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Industry News

Design of High Gain Microstrip Antennas

Use of gain-enhancement techniques previously developed for conventional patch antennas to improve the performance of cavity-backed patch antennas
September 1, 1999
Technical Feature Design of High Gain Microstrip Antennas Frank Zavosh and James T. Aberle Please click here to view the pdf file of the Technical Feature  ...
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Microstrip Resonant Phase Shifters

The design of a continuously adjustable delay for the STM64 (OC192)-specified 10 GHz clock frequency and its integer multiples and submultiples to control different electro-optical devices in optical-fiber line-terminal equipment
September 1, 1999
Microstrip Resonant Phase Shifters Matjaz Vidmar University of Ljubljana Slovenia There are several possible designs for adjustable phase shifters (or adjustable delay lines) depending on the operating frequency, required bandwidth, power handling and technology used (mechanical, ferrite, PIN diode, varactor or I/Q modulator). This article describes the particular problem...
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Increased Accuracy of Absolute Group Delay Measurements

A two-step approach to measuring absolute group delay of frequency-translation devices that reduces ripple and increases accuracy to ±150 ps
September 1, 1999
Technical Feature Increased Accuracy of Absolute Group Delay Measurements My Le Truong Please click here to view the pdf file of the Technical Feature...
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3G is Poised to Take Over the Cellular World

A look at third-generation (3G) hardware and software, which are expected to significantly expand the range of available wireless options
September 1, 1999
3G is Poised to Take Over the Cellular World After much hoopla, third-generation (3G) hardware and software are finally preparing to become a reality at a global scale. Unresolved design and protocol questions are rapidly being addressed — but does anyone want a hand-held unit for the Internet? Ernest...
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Publish or Perish: It’s Not Just for Academics Anymore

Publishing as an important part of a successful professional career
September 1, 1999
Publish or Perish: It’s Not Just for Academics Anymore Harlan Howe, Jr. Microwave Journal Publisher/Editor The academic community has a long history of measuring the accomplishment of its members by their proclivity to publish and to base growth and advancement on the sheer quantity of those publications. “Publish or...
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Design Equations for Maximum Power Transfer in Back-to-back Stacked Microstrips

The design of noncontacting RF interconnections using a slot in the common ground plane for application in mulitlayered structures
September 1, 1999
Technical Note Design Equations for Maximum Power Transfer in Back-to-back Stacked Microstrips K. Rambabu, M. Ramesh and A.T. Kalghatgi Please click here to view the pdf file of the Technical Note...
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Understanding Phase-locked DRO Aspects

Phase noise considerations, a loop optimization procedure and a specific acquisition technique for phase-locked dielectric resonator oscillators (DRO)
September 1, 1999
Technical Feature Understanding Phase-locked DRO Design Aspects Avi Brillant Please click here to view the pdf file of the Technical Feature  ...
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RAWCON ’99 Conference Report

A recap of the 1999 IEEE Radio and Wireless Conference (RAWCON '99) held August 1-4 in Denver, CO
September 1, 1999
RAWCON ’99 Conference Report The 1999 IEEE Radio and Wireless conference (RAWCON ’99) was held in Denver, CO August 1–4, and proved to be a great success. This conference has evolved over the past few years into a very solid technical meeting, which emphasizes the interdisciplinary understanding of technologies...
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Components

September 1, 1999
Components Five-bit Digital Attenuator The model AD280-25 GaAs IC FET five-bit digital attenuator operates over the frequency range from DC to 2 GHz and features a least significant bit of 0.5 dB and a total attenuation of 15.5 dB. Bit values are 0.5, 1, 2, 4 and 8 dB....
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Sources

September 1, 1999
Sources Synthesized Telemetry Transmitter The ST400QF series airborne synthesized patented FEHER quadrature phase-shift keying (QPSK) telemetry transmitter doubles the information bandwidth (when compared to conventional PCM-FM) while utilizing class C power amplifiers, which maintain the power efficiency associated with standard FM transmitters. Available in 2, 5, 8 and 10...
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