Trusted Resource for the Working RF Engineer
Search MWRF
Home
Product Directory
Topics
Note Pad
MTT-S Video Coverage
Back Issues
RF Blogs
Military Electronics
Subscribe
News
Online News
Design Features
Web Seminars
PartFinder
Whitepapers
Microwave Legends
Newsletter
EuMW 2007
WebConnect
RF Design
RSS
RSS
Sponsored Links
 |
|
ISSUE DATE: MAY 2005 | |
|
OPTIONS | |
||
|
|
|
|
• Get a FREE Subscription • Renew Subscription • Reprints/Licensing • Submit Article Ideas |
|
|||
|
|
|
|
|
|
|
|
May 2005 - In This Issue [Cover Story] Improvements Propel Peak Power Meter Consider the challenge of improving a proven performer, the 4500A peak power meter from Boonton Electronics (Parsippany, NJ). That was the task facing the popular instrument's design team, which responded with the new model 4500B after incorporating both analog and digital refinements. The firm's latest instrument brings new test and display capabilities to continuous-wave (CW), modulated-signal, and peak power measurements from 30 MHz to 40 GHz. Since most modern... — Jack Browne [News] Microwave Week Returns To Sunny California Every year, microwave engineers descend upon one destination to hear the newest microwave theories and catch a glimpse of the latest products. That destination is the site of the IEEE MTT-S International Microwave Symposium (IMS). This year, Long Beach, CA is playing host to the conference and exhibition. The conference is brimming with plenary, technical, and panel sessions. It also offers tutorials, workshops, and an interactive forum. To round out this year's experience, attendees also... — Nancy Friedrich [Design Features] Make Ultrawideband OFDM Transmitter Measurements Ultrawideband (UWB) communications systems offer great promise of fast data rates and video transmissions without RF carriers. Based on short, time-sequenced pulses, these systems exhibit wide bandwidths, but considerable engineering challenges for reliable spectrum shaping. Engineering challenges also exist in testing UWB devices, since traditional test instruments are based on evaluating narrowband signals. Fortunately, with advances in RF signal generators, analyzers, and digital... — Peter Cain [Design Features] Analyze Circulator Design Equations Circulators are essential elements in high-power microwave systems and antenna networks in which energy must be directed and isolated. Circulator design involves the use of well-studied models based on classic equations presented by Bosma.1 Although computers gain in processing speed, and computer-aided-engineering (CAE) programs grow in sophistication, these two equations nonetheless provide the background for high-frequency circulator development and modeling. Using these two... — Zelman Harbater [Design Features] MESFET Process Yields MMIC Ka-Band PAs Millimeter-wave components promise to deliver the broadband performance needed for multimedia services. Achieving these services, however, required reliable, low-cost monolithic microwave integrated circuits (MMICs) suitable for millimeter-wave use. Based on the multifunction-self-aligned-gate (MSAG™) MESFET process from M/A-COM (Roanoke, VA), a design approach was developed for several Ka-band MMIC power amplifiers. The amplifiers, which delivered several watts of output power at... — Inder Bahl [Product Technology] Stable Sources Limit Phase Hits Communication systems rely on stable oscillators to maintain phase-locked conditions and ensure transmitted data integrity. Many third- and later-generation systems incorporate multiple narrowband coupled-resonator oscillators (NCROs) to cover their required bandwidths. As an alternative, however, the new series of voltage-controlled oscillators (VCOs) from Synergy Microwave (Paterson, NJ) can provide the equivalent bandwidth and tuning range of multiple NCROs, with the low... — Jack Browne [Product Technology] Software Supports Signal-Integrity Analysis Signal-integrity (SI) issues were once a concern of digital circuit designers rather than RF/microwave engineers. But the divide between the two groups has narrowed to a relatively thin line in recent years, prompting software developers to address device and circuit models within an environment suited for SI analysis. One of these developers, Applied Wave Research (El Segundo, CA), now offers a solution for engineers faced with SI issues: the company's AWR SI 2005 design suite... — Jack Browne [Editorial] Searching For The News At The MTT-S May brings with it thoughts of mid-year goals and planning for that annual tradition: the Microwave Theory & Techniques Symposium (MTT-S). The site for theMTT-S is Long Beach, CA, and it will take place during the week of June 12-17. Our preview of that important microwave event, presented by Editor Nancy Friedrich, begins on p. 33. It includes a look at some of the technical presentations, along with a number of key product introductions. While the MTT-S technical... — Jack Browne |
|
Resources
Electronic Design