Technical articles A selection of technical papers and articles, relevant to your industry.
Data Services Over Optical Transport Networks  | Last mile, light speed (fibre optic networks in the home)
Richard Low, Freescale Semiconductor (August 2004)
Fibre-based passive optical networks (PONs) are considered by a number of telecom carriers to be the next-generation access solution, providing unlimited bandwidth to end-users. Broadband PONs are enabling a more than 10-fold increase in bandwidth over existing copper-based technologies, and with lower maintenance and operating costs.
Source: Communications Engineer, August 2004 | | | An Integrated Approach To Metro Ethernet Design
T J Pennell, Cisco Systems (June 2003)
More than ever, today's evolving networks are driven by the demand for a wide array of high-bandwidth data services. Enterprises must upscale and centralize their information technology to stay competitive. Service providers must increase capacity and service offerings to meet customer requirements, but at the same time maintain their own profitability. Both enterprises and service providers need to lower capital and operating expenditures while they evolve their networks to a simplified architecture. In addition, service providers must accelerate time to market for the delivery of value-added services, and enterprises must accelerate and simplify the process for adding new users.
Source: IEE Seminar on Data Services over Optical Transport Networks, 5 June 2003 | | | Global framework and specific aspects for data services over optical networks
L Le Beller, France Telecom R&D (June 2003)
In the world of today's telecommunication, modelling of networks and services has become an essential activity to cope with the constant increasing diversity of services, technologies and actors. Many of the elements included in these three domains are interacting together, and the global behaviour of such a system can't be predicted without an adequate modelling tool.
Source: IEE Seminar on Data Services over Optical Transport Networks, 5 June 2003 | | | Physical Integration of SDH Switching And Ethernet Switching ? Analysing The Opportunities And Constraints
G W Rees, Marconi (June 2003)
SDH/SONET is the established Layer-1 transmission technology for public networks (WAN) across the globe. Ethernet, a Layer-1 and Layer-2 transmission and switching protocol, occupies a similar position for private networks (LAN). In anticipation of substantial growth in Ethernet services across the public network SDH/SONET is providing new functionality to support Ethernet services in a cost-effective manner. This paper discusses the balance between providing cost-effective interfaces between the SDH/SONET and Ethernet equipment or physically integrating the SDH/SONET and Ethernet equipment.
Source: IEE Seminar on Data Services over Optical Transport Networks, 5 June 2003 | | | Metro WDM for extended SAN applications [Slides]
F Tassara, Alcatel (June 2003)
Enterprises are generating an ever- increasing amount of data which is vital to their operations due to new applications (e-commerce, ERP, CRM, SCM, multimedia). Data needs to be protected against equipment and operator failures as well as disasters (natural and man- made) hence high reliability, high performance, automation and geographic separation are required. Costs in the present climate are a major concern thus storage consolidation, efficiency and scalability are of paramount importance
Source: IEE Seminar on Data Services over Optical Transport Networks, 5 June 2003 | | | Data over SONET/ SDH - New Technology Standards and Test Challenges [Slides]
A Frew, Agilent Technology (June 2003)
This presentation covers data over SONET/ SDH (DoS) market drivers, New DoS technologies including Generic Framing Procedure (GFP) and Virtual Concatenation (VC) and test challenges for new DoS technologies.
Source: IEE Seminar on Data Services over Optical Transport Networks, 5 June 2003 | | | Emerging Standards & Applications For Transport of Data Services [Slides]
A McGuire, BTexact & G Abbas, Marconi (June 2003)
Topics covered include Ethernet Transport Network Architecture Standards, Data Signal Mappings Standards, Direct mappings, Generic Framing Procedure (GFP), Link Capacity Adjustment scheme (LCAS) and Next Generation SDH
Source: IEE Seminar on Data Services over Optical Transport Networks, 5 June 2003 |
Design | | Microwaves meet digital signal integrity (digital design)
Randy Weber, Agilent Technologies (August 2004)
Digital design now demands mixed-signal design techniques to ensure that high-speed onboard signal traces will work in the target system. The speeds now demanded by protocols such as PCI Express even demand the use of mixed-signal techniques from the microwaves world.
Source: Electronics Systems and Software, August 2004 | | | Low-power transceivers get patients mobile
C Falcon, AMI Semiconductor (June 2004)
Low power wireless systems are delivering mobility, improved patient care and relative comfort both inside and outside the medical facility. Medical electronic devices are benefiting from transceivers that use the latest mixed-signal ASIC technology to provide desired rates of data transfer over short ranges.
Source: Communications Engineer, June 2004 | | | We mast do something about it
S Harris (June 2004)
Downward pressure on costs is creating technical and commercial challenges for manufacturers of basestations and basestation components.
Source: Communications Engineer, June 2004 | | | Designing buildings for the wireless age
A Newbold, Arup Communications (June 2004)
An emerging technology called FSS (frequency selective surface) enables the deployment of secure wireless systems in indoor environments. FSS takes advantage of innovative techniques in building design and the use of attenuating materials.
Source: Communications Engineer, June 2004 | | | In-building wireless system design
S R Saunders, Cellular Design Services Ltd. (March 2004)
In-building systems are an essential component of most wireless systems. They provide improved coverage in the locations where over 70% of mobile calls originate and terminate, focused capacity for large-public hot-spots such as airports, flexible tariffs and wireless services for corporate offices, and excellent control of interference and wideband channel dispersion for high data rate systems. Many of today’s technologies require the deployment of such systems, including 2G and 3G cellular, TETRA and Wireless LAN. However, despite the increasing maturity and volume of in-building systems, no standard design approach has yet emerged. The absence of objective methods for evaluating and optimising the performance of the system tends to lead to over-design, increasing the expense of systems and reducing the overall take-up of in-building systems, to the detriment of the market.
Source: Communications Engineer, April 2004 - online | | | When analogue is better
J Ju, Fairchild Semiconductor (February 2004)
High performance analogue switches are helping designers to meet the demand for convergent functionality in GSM/GPRS and even 3G multimode mobile phones, and other portable devices.
Source: Communications Engineer, February 2004 | | | Design considerations for adaptive active phased-area ?multifunction? radars
J Holloway, BAE Systems (November 2001)
Adaptive active phased-array radars are seen as the best candidate for a true ?multifunction? radar system. Their adaptive nature and real-time task scheduling allows them to operate at performance levels well above conventional radar designs, and their ability to use of all the available RF power and to minimise RF losses also makes them suitable for very long range radars. The design of such radars is addressed in terms of the system and its component parts and the operational requirements that drive the design, and some futures uses outside the military field are considered.
Source: Electronics & Communication Engineering Journal, December 2001 | | | Design-for-reusability in VHDL
J Morris Chang and S. Kagan Agun, Illinois Institute of Technology (September 2001)
The reuse of electronic components can improve productivity in system design. However, without careful planning, components are rarely designed for reuse. Hardware description languages are commonly used to construct from simple hardware to complex ones. HDLs allow the creation of reusable models, but the reusability of a design does not come with language features alone. It requires design disciplines to reach an efficient reusable design. Reusability issues and design methodologies to achieve design-for-reusability (DFR) are presented. Results of measuring the reusability of ten VHDL applications, based on the proposed reusable models, are summarised. This research allows us to gain an insight into DFR.
Source: Electronics & Communication Engineering Journal October 2001 | | | Fully integrated 38GHz transmitter and receiver MMICs for communications applications
S Nam et al. (February 1999)
In this paper the design of resistive PHEMT mixers and their applications in fully integrated millimetre-wave monolithic transmitter and receiver chips are described. In particular, techniques for obtaining low conversion loss of the resistive mixer in single-chip transmitters and receivers are described.
Source: IEE Colloquium on MM-Wave Circuits and Technology for Commercial Applications, March 1999 | | | The basics of radio system design
M Hunter, Plextek Communications Technology Consultants (April 2000)
An introductory overview is given of the design of radio transceivers. It is shown how the requirements of a radio are derived from link budget calculations and then the modulation scheme, transmitter and receiver cascades are designed to fulfil them.
Source: IEE Seminar on How to Design RF Circuits, April 2000 | | | Amplifier design for high efficiency performance
A S Virdee & B S Virdee, Filtronic Components (December 2000)
This paper describes the design and performance of high efficiency power amplifiers at X-band using state-of-the-art power heterostructure FET (HFET) devices operating in Class AB/F. Conventional MIC technology was employed for practically realising the designs. The amplifiers exhibited power-added efficiencies significantly higher than conventional power devices.
Source: IEE Seminar on Microwave and RF Power Amplifiers, December 2000 | | | How to design RF circuits ? Synthesisers
S Williamson, Plextek Ltd. (April 2000)
Frequency synthesisers form the basis of most radio system designs and their performance is often key to the overall operation. This paper presents an introductory overview of the basic parameters governing the design of a phase locked loop frequency synthesiser and their effects, with the sources of phase noise within a design also being considered. Finally a list of common problems, along with some possible solutions, is given.
Source: IEE Colloquium on How to Design RF Circuits, April 2000 | | | How to design RF Circuits ? Oscillators
A Dearn, Plextek Ltd (April 2000)
Oscillators can generally be categorised as either amplifiers with positive feedback or as negative resistance circuits At RF and Microwave frequencies the negative resistance design technique is generally favoured. This paper will now concentrate on a worked example of a Clapp oscillator, using a varactor tuned ceramic coaxial resonator for voltage control of the output frequency.
Source: IEE Colloquium on How to Design RF Circuits, April 2000 | | | Microstrip Circuits
J L B Walker, Semelab plc (April 2000)
When the length of the wires used to interconnect components becomes greater than about one-tenth of a wavelength, then the transmission line effects associated with the distributed series inductance and shunt capacitance must be taken into account. The interconnecting wires, which often take the form of tracks on a printed circuit board, need to have a well-defined cross-sectional structure. The possible structures are illustrated and considered in detail.
Source: IEE Seminar on How to Design RF Circuits, April 2000 | | | FLO/STRESS: an integrated software module to predict stress in electronic products
C Bailey, M Warner, A Agha and K Pericleous, University of Greenwich and J Parry, C Marooney, H Reeves and I Clark, Flomerics Ltd (May 2002)
Software technology that predicts stress in electronic systems and packages, developed as part of TCS Programme, is described. The software is closely integrated within a thermal design tool providing the ability to simulate the coupled effects of airflow, temperature and stress on product performance. This integrated approach to analysis will help decrease the number of design cycles.
Source: Computing & Control Engineering Journal June 2002 | | | Virtual test reduces semiconductor product development time
T Hogan and D Heffernan, University of Limerick (April 2001)
The speed at which IC products are introduced to the market-place is key to the competitive success of individual companies and IC manufacturers are predicting a significant reduction in product development times over the next decade. Virtual test is an emerging methodology that allows test engineers to create an early simulation of the manufacturing test environment for a new semiconductor IC product and could reduce total IC development time by more than 15%.
Source: Electronics & Communication Engineering Journal April 2001 |
Digital Communication  | Telecommunications Hot Topics Forum
Communications PN (November 2004)
Presentations from speakers at The IEE Telecommunications Hot Topics Forum - Telecoms Networks The Next Generation, held from 9 - 10 November 2004 at The IEE Savoy Place, London.
Source: Hot Topics Forum 2004 | | | A comparison of competing broadband in-home technologies
T Zahariadis, Bell Labs et al. (August 2002)
Although a large number of homes have PCs, modems or multimedia network-enabled appliances, the majority are not equipped to support their interconnection, and most consumers are unwilling or cannot afford to have their homes rewired. This paper reviews and compares the available competing broadband home-networking technologies: technologies that reuse the mains or telephone wiring, technologies requiring new wiring and, in particular, radio networking technologies. The residential gateway between the access and in-home networks is also discussed.
Source: Electronics & Communication Engineering Journal, August 2002 | | | Quality of service management for broadband residential video services
R J Green,Birmingham University, et al. (December 2001)
This paper introduces an approach to managing quality-of-service (QoS) for a residential video-on-demand (VoD) service employing MPEG-2 transport streams using an experimental asynchronous transfer mode (ATM)/asymmetric digital subscriber line (ADSL) access network testbed.
Source: Electronics & Communication Engineering Journal, December 2001 | | | Boxing clever
V Seferidis, Toshiba Information Systems (UK) (November 2001)
Vassilis Seferidis describes how Toshiba’s Unified Digital Architecture will enable the convergence of home entertainment and computing.
Source: IEE Review November 2001 | Broadband Applications | | Broadband communications for broadcasting ? forcing the debate on convergence [slides]
S Lowe, Broadband Wireless Association Ltd & Telewest (December 2001)
Describing the available and emerging broadband access technologies, this presentation covers DSL, cable modems, fibre, coax, satellite and free space optics but concentrates on Broadband Fixed Wireless Access. After a look at the engineering and technical elements, the commercial, regulatory and service impact of broadband on the traditional markets of broadcasting, telecoms and cable TV are assessed.
Source: IEE MMC PN Launch event: Multimedia Communications in the 21st Century - Winners and Losers?, 10 Dec 2001. | | | Broadband communications for broadcasting ? forcing the debate on convergence
S Lowe, Broadband Wireless Association Ltd & Telewest (December 2001)
Describing the available and emerging broadband access technologies, this presentation covers DSL, cable modems, fibre, coax, satellite and free space optics but concentrates on Broadband Fixed Wireless Access. After a look at the engineering and technical elements, the commercial, regulatory and service impact of broadband on the traditional markets of broadcasting, telecoms and cable TV are assessed.
Source: IEE MMC PN Launch event: Multimedia Communications in the 21st Century - Winners and Losers?, 10 Dec 2001. | | | The broadband discontinuity
P Radley, Alcatel (March 2002)
The Economist has stated ‘Broadband will create as big a behavioural shift as electrification over a century ago’. This presentation focuses on two key areas in which broadband can help create a ‘behavioural shift’: teleworking – not from home, but in the community through a series of BroadPlaces within walking distance of where people live; and education - targets for university education will put extra strain on schools struggling to recruit specialist teachers. Broadband can help share those key skills between schools. How do we as engineers best play our part in translating technology evolution into revolution in society?
Source: Eric Eastwood Lecture, 26 March 2002 | | | Realising the broadband future
W Webb, Motorola (July 2000)
The convergence of fixed and mobile networks into a seamless broadband communications infrastructure remains a tantalising dream. Describes how the dream might be transformed into a ubiquitous reality.
Source: IEE Review July 2000 | | | Mesh networks for broadband access
T Fowler, Radlant Networks (January 2001)
Broadband wireless access systems must satisfy exacting technical and commercial requirements. Describes a novel approach that uses Internet-like routing to bridge the infamous ‘last mile’.
Source: IEE Review January 2001 | | | Broad is the way
T Mitchell, Multiple Access Communications (January 2001)
Will ultra-wideband technology deliver on its promise to make better use of bandwidth? Describes the basic principles and the role of regulation in determining the UWB devices destined for commercial deployment. One consequence of the severe constraints on spectrum availability has been a growing interest in the development of novel technologies aimed at allowing new services to use spectrum already allocated to established services, but without causing significant interference to incumbent users. Ultra-wideband (UWB) systems, which combine definition by adding all signals that have bandwidths in excess of 1·5 GHz.
Source: IEE Review January 2001 | | | Wireline access evolution
A Pickering (January 2000)
This paper provides an overview of the evolution of digital transmission in the copper access network from voice-band modems to Digital Subscriber Line (DSL) technologies.
Source: IEE Seminar - 'Multimedia in the local loop: the DSL seminar'. January 2000. | | | Combining digital watermarks and collusion secure fingerprints for customer copy monitoring
J Dittmann, GMD - German National Research Center for Information Techology (April 2000)
Digital watermarking is the enabling technology to prove ownership on copyrighted material, detect originators of illegally made copies, monitor the usage of the copyrighted multimedia data and analyze the spread spectrum of the data over networks and servers. This paper presents a technology for combining a collusion-secure fingerprinting scheme based on finite geometries and a watermarking mechanism with special marking points for digital images.
Source: IEE Seminar - Secure images and image authentication. April 2000. | | | Voice over DSL [slides]
M Grant, Nortel (January 2000)
Slides presented at IEE Seminar - Multimedia in the local loop: The DSL seminar. January 2000.
Source: IEE Seminar - Multimedia in the local loop: The DSL seminar. January 2000. | | | DSL in the access network
D Jenkinson, Telspec (January 2000)
Telspec has been a supplier of DSL based access equipment to world-wide markets for many years. The current number of subscribers connected via Telspec access equipment exceeds 5 million lines This paper considers the issues (technology and market related) that have influenced Telspec’s DSL product roadmap.
Source: IEE Seminar - Multimedia in the local loop: The DSL seminar. January 2000. | | | Next generation access technologies: SDSL & VDSL
C Metzger, Infineon Technologies (January 2000)
Many DSL technologies are currently taken into consideration to transform the last mile of copper infrastructure from the voice-grade world to the broadband universe. As far as the public discussion in the media is concerned ADSL is much praised and deserves a lot of attention. However despite its’popularity ADSL does not seem to be able to solve the biggest challenges lurking for telecom operators relying on the copper infrastructure. Those challenges are to satisfy the need for symmetric data-rates and to cope with the emerging threats posed by cable network operators.
Source: IEE Seminar - Multimedia in the local loop: The DSL seminar. January 2000. | | | Access to bandwidth
D P Clarkson, OFTEL (January 2000)
In November 1999, after two consultation documents, OFTEL issued a statement on access to bandwidth. The statement confirmed that BT would be required to lease circuits within the local copper access network to other operators so that they could be converted to a broadband data channel, using technologies such as digital subscriber line (DSL). This paper identifies some of the main technical issues that need to be resolved to ensure the reliable delivery of broadband services using the local access network.
Source: IEE Seminar: 'Multimedia in the local loop: the DSL seminar' January 2000 |
Digital Communication | | Voice Over IP
David Lake, CISCO Systems Ltd (November 2004)
View the Power Point slides from David Lake's paper presented at the Hot Topics Forum, November 2004.
Source: Hot Topics Forum, November 2004 | | | Look Who's Talking
Ian Germer, Orange (November 2004)
View the Power Point Presentation from Ian Germer's paper presented at the Hot Topics Forum.
Source: Hot Topics Forum- November 2004 | | | Next Generation Networks
Husam Awadalla (November 2004)
View the Power Point presentation of Husam Awadalla's paper presented at the Communications Hot Topic Forum in November 2004.
Source: Communications Hot Topics Forum- November 2004 | | | Push to Talk- an overview of the past, present and Future
Steve Griffin, PA Consulting Group (November 2004)
This presentation considers: * Where Push-To-Talk (PTT) has come from and what all the excitement is about * Current Market and Technical options and issues * Strategic Questions moving forward and Keys to Success
Source: IEE Annual Hot Topics Forum, November 2004 | | | Just What Is...ATCA?
Jurgen Eder, SBS Technologies (October 2004)
What does the Advanced Telecom Computing Architecture mean to systems integrators and designers?
Source: Electronics Systems and Software - October 2004 | | | Look closer (wireless modulation techniques)
Dean Miles, Tektronix (August 2004)
A look at the advantages of real-time spectrum analysis over conventional swept spectrum techniques.
Source: Communications Engineer, August 2004 | | | Peer to peer
C Smith and K Jonsson (March 2004)
The next-generation version of Internet Protocol, IPv6, will increase dramatically the number of available IP addresses and enable secure peer-to-peer communication. Two key areas to be considered in the changeover to IPv6 are the way in which the new IP version will address the shortcomings of today's Network Address Translation (NAT) system, and its impact on security.
Source: Communications Engineer, April 2004 | | | A comparison of competing broadband in-home technologies
T Zahariadis, Bell Labs et al. (August 2002)
Although a large number of homes have PCs, modems or multimedia network-enabled appliances, the majority are not equipped to support their interconnection, and most consumers are unwilling or cannot afford to have their homes rewired. This paper reviews and compares the available competing broadband home-networking technologies: technologies that reuse the mains or telephone wiring, technologies requiring new wiring and, in particular, radio networking technologies. The residential gateway between the access and in-home networks is also discussed.
Source: Electronics & Communication Engineering Journal, August 2002 | Broadband Applications | | Voice Over IP
David Lake, CISCO Systems Ltd (November 2004)
View the Power Point slides from David Lake's paper presented at the Hot Topics Forum, November 2004.
Source: Hot Topics Forum, November 2004 | | | Revolution in home security
D Rose, BTexact Technologies (February 2003)
Deployment of broadband communications into residential properties enables the use of high quality audio and video for home security monitoring. This article reviews the technology.
Source: Communications Engineer, February 2003 | | | Content engineering
J O?Reilly, EPSRC (July 2002)
Given the need for content where will it all come from and how and by whom will it be generated? This last aspect has led the author to start to formulate thoughts that may facilitate development within the IEE of ‘content engineering’.
Source: Electronics & Communication Engineering Journal, August 2002 | | | The broadband discontinuity
P Radley, Alcatel (March 2002)
The Economist has stated ‘Broadband will create as big a behavioural shift as electrification over a century ago’. This presentation focuses on two key areas in which broadband can help create a ‘behavioural shift’: teleworking – not from home, but in the community through a series of BroadPlaces within walking distance of where people live; and education - targets for university education will put extra strain on schools struggling to recruit specialist teachers. Broadband can help share those key skills between schools. How do we as engineers best play our part in translating technology evolution into revolution in society?
Source: Eric Eastwood Lecture, 26 March 2002 |
EMC | | EMC - it's nearly all about the cabling
(April 2003)
Anyone working in a systems electromagnetic compatibility environment is usually painfully aware of the fact that, often, the weakest link in the system is the cabling. Whether this is the cable or the connectors themselves, or more likely the interface between the cable and the connectors where there may be a poor connection of the cable screen, the ability of cabling to leak or absorb spurious signals is a cause of much EMC frustration. There are a number of factors working together to increase the relevance of cabling EMC to industry and academia, particularly for communications cabling. These include higher data rates and developments in EMC standards and legislation. The purpose of this seminar was to bring together industry, academia and consultants to discuss EMC issues, including techniques to improve EMC behaviour and to clarify upcoming standards.
Source: IEE Seminar |
Fibre Optics | | Fibre optics challenges
K Stubkjaer, Technical University of Denmark (February 2002)
The fibre optics future is packed with lots of exciting challenges as the demand for bandwidth increases steadily. We have already reached breathtaking numbers for transmission capacity on an optical fibre, but what will we do when today’s techniques and technologies have run out of steam?
Source: Photonics Professional Network Lecture, 19 February 2002 | | | Fibre optic warning tapes for cable systems
J Warner, Boddingtons (January 2000)
This paper gives an example of an early warning alarm system, named OVERLORD, which uses fibre optic technology to warn utilities and network providers of major disturbances to any buried services such as electricity, gas, water, or telecommunications.
Source: IEE Seminar on Asset Management of Cable Systems, London, February 2000. | | | The use of fibre-optic-links in pulsed power measurements
R. Newell, PPM Ltd (May 2000)
This paper discusses analogue Fibre-Optic-Links and their many inherent advantages in high voltage/energy pulsed power measurements. The most important types of Fibre-Optic-Links are presented, together with their methods of operation and the relative advantages of each type for different measurement applications.
Source: IEE Seminar - Pulsed Power 2000. May 2000. |
Filters | | Buried pipeline mapping from satellite images
M Petrou, University of Surrey and I Gracia, University Jaume (July 2002)
There are approximately 5 million kilometres of high-pressure pipelines in the world with an average lifetime of 30 years. Ground instabilities may cause ground movement and the use of the land over and around a pipeline may change. As governmental authorities increasingly require pipeline operators to produce accurate location maps of pipeline routes, mainly for safety reasons, it is necessary to remap pipelines regularly.
Source: Electronics & Communication Engineering Journal, August 2002 | | | Cancellation of siren noise from two-way voice communication inside emergency vehicles
C G Guy, R S Sherratt, University of Reading & D M Townsend, Panasonic (January 2002)
The development of an adaptive filter system, capable of reducing significantly the effect of siren noise within the cab of an emergency vehicle, is described. The system is capable of removing the siren noise picked up by the radio microphone inside the vehicle, without degrading the wanted voice signal, thus allowing the siren to be used at all times.
Source: Computing & Control Engineering Journal, February 2002 | | | A synthesis based approach to automated filter tuning
D Ibbetson, Filtronic plc. (November 2000)
The process described here has been verified on data obtained from simulations and on real filters currently in production at Filtronic Comtek; the results have been extremely promising and the process is being incorporated into production lines. The initial system is a guidance system for human operators and allows the devices to be aligned faster than the average technician can achieve without guidance. If the filter to be aligned can be measured accurately, the device structure is known and a synthesis procedure for the structure is known then the procedure can be applied with success.
Source: IEE Seminar on Microwave Filters and Multiplexers, November 2000 | | | Filters
J L B Walker, SEMELAB (April 2000)
This introducton to the role of filters in RF circuits consider filters designed only for a specific amplitude response - that is, for applications where the phase response of a filter is of no consequence.
Source: IEE Seminar on How to Design RF Circuits, April 2000 | | | Compact pseudo-lumped element quasi-elliptic filters
H T Su, F Huang et al, University of Birmingham (October 2000)
Quasi-lumped element planar high temperature superconductor bandpass filters with very compact new resonator structures are reported. Cross coupling is introduced by using an electrically short transmission line. Experiments show good agreement with theoretical responses.
Source: IEE Seminar on Microwave filters and multiplexers, London, November 2000 | | | Numerical modeling of waveguide and microstrip filters
H Y Wang, J M Oakley et al., Vector Field (October 2000)
This paper discusses the simulation of microwave filters using a Finite-Difference Time-Domain (FDTD) simulator. The algorithm in the simulator discretises and solves time-dependent Maxwell?s curl equations in both the time and space domains. A variety of waveguide and microstrip filters at various frequency bands were examined using the FDTD simulator. The agreements between simulated and measured results are excellent.
Source: IEE Seminar on Microwave filters and multiplexers, London, November 2000 | | | Peak voltage analysis in high power microwave filters
A R Harish and R J Cameron, ComDev (October 2000)
As part of the design process of a high power microwave bandpass filter or multiplexer, it is important to know the strengths and directions of the electric fields within each of the resonant cavities. For cavities with complex geometry, numerical techniques such as finite element (FE) analysis must be used. This means setting up an FE model and 'soft tuning' it before analysing it, a slow process. This paper outlines a method which will speed the process up considerably.
Source: IEE Seminar on Microwave filters and multiplexers, London, November 2000 | | | High frequency thin film ferroelectric acoustic resonators
P Kirby, Q-X Su, Cranfield University, et al. (October 2000)
Presently front-end RF filters are one of the largest elements in the PCS Handset and it is very difficult to fabricate them on chip. To achieve component miniaturisation and integration in future mobile communication systems, Thin Film Bulk Acoustic Resonators (FBAR) will be the best choice to replace the current ceramic or Surface Acoustic Wave (SAW) devices because they are compact, have low-loss and are largely compatible with the existing high frequency Si/GaAs IC processing.
Source: IEE Seminar on Microwave filters and multiplexers, London, November 2000 |
Filters | | Compact pseudo-lumped element quasi-elliptic filters
H T Su, F Huang et al, University of Birmingham (October 2000)
Quasi-lumped element planar high temperature superconductor bandpass filters with very compact new resonator structures are reported. Cross coupling is introduced by using an electrically short transmission line. Experiments show good agreement with theoretical responses.
Source: IEE Seminar on Microwave filters and multiplexers, London, November 2000 | | | Numerical modeling of waveguide and microstrip filters
H Y Wang, J M Oakley et al., Vector Field (October 2000)
This paper discusses the simulation of microwave filters using a Finite-Difference Time-Domain (FDTD) simulator. The algorithm in the simulator discretises and solves time-dependent Maxwell?s curl equations in both the time and space domains. A variety of waveguide and microstrip filters at various frequency bands were examined using the FDTD simulator. The agreements between simulated and measured results are excellent.
Source: IEE Seminar on Microwave filters and multiplexers, London, November 2000 | | | Peak voltage analysis in high power microwave filters
A R Harish and R J Cameron, ComDev (October 2000)
As part of the design process of a high power microwave bandpass filter or multiplexer, it is important to know the strengths and directions of the electric fields within each of the resonant cavities. For cavities with complex geometry, numerical techniques such as finite element (FE) analysis must be used. This means setting up an FE model and 'soft tuning' it before analysing it, a slow process. This paper outlines a method which will speed the process up considerably.
Source: IEE Seminar on Microwave filters and multiplexers, London, November 2000 |
Finite Element Analysis | | Efficient methods for modelling substrate coupling in mixed-signal integrated circuits
R Singh, S Sali & W L Woo, University of Newcastle (November 2001)
A key problem in the design of large mixed-signal circuits is the noise caused by the coupling of digital signals into the substrate. This paper describes methods that allow circuit designers to model efficiently such substrate noise in large mixed-signal SPICE designs. A new methodology is presented for efficiently modelling the substrate noise caused by current injection and its coupling to analogue signals; this is then extended to real-time modelling. The methods are demonstrated on several prototype example circuits.
Source: Electronics & Communication Engineering Journal December 2001 | | | Finite Element Analysis in the Design of Permanent Magnet Machines
Z Q Zhu, G W Jewell, and D Howe, University of Sheffield (January 2000)
This presentation focuses on permanent magnet brushless machines, and illustrates the application of finite element analysis to both linear and rotary machine topologies, demonstrating how it aids prediction of iron loss and eddy current loss, and the influence of magnet powder alignment and impulse magnetisation systems on machine performance.
Source: Presented at IEE Seminar on Current Trends in the Use of Finite Elements in Electromechanical Design and Analysis, London, January 2000. |
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