Industry News | Microwave Journal

Using Guided Wavelength as a Basis for the Design of Dielectric Rod Antennas

May 1, 2003

Carl L. Everett, Bell Helicopter Textron Inc.

When designing dielectric rod antennas for maximum bandwidth, maximum gain, minimum beamwidth and/or low side lobes, design parameters reported in the literature are provided in terms of free-space wavelength. While this methodology lends itself well to other antenna types, it is not as useful when used to describe dielectric...

Fast and Accurate High Power Device Characterization with a Microstrip SOL Method

High power device characterizations, performed with a microstrip short-open-load (SOL) calibration kit, are presented. This article demonstrates an interesting alternative to the classical through-reflect-line (TRL) method, when only terminating impeda...

May 1, 2003

Pierre Bertram, Thales Air Defense

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Precise device characterization is the starting point of any good circuit design. This task can be particularly challenging when the device is a high power transistor having low input and output impedances. For devices working only under pulse conditions, specific test benches exist 1 but are rather complicated and...

An Aircraft Single-antenna FM Radio Altimeter

Advantages of a frequency modulated single-antenna radio altimeter, including lower cost and weight, improved accuracy and higher altitude range

May 1, 2003

Leo G. Maloratsky, Rockwell Collins

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As is well known, there are two general types of altimeter systems - a pulse radar altimeter and a frequency modulated, continuous wave (FM-CW) radio altimeter. Aircraft radio altimeters typically operate at altitudes from 0 to 8000 feet utilizing separate antennas for transmit and receive. Such radio altimeters have...

Welcome to the 2003 International Microwave Symposium

May 1, 2003

Richard V. Snyder

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Welcome to Philadelphia, home of the 2003 International Microwave Symposium! The fifth-largest city in the United States and the second largest on the East Coast, Philadelphia (known from June 8-13, 2003 as Microwave Metropolis) is one of the world's most dynamic destinations. In Philadelphia, you will be at the...

Attending the Conference

May 1, 2003

Harlan Howe, Jr., Editor, <I>Microwave Journal</I>

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This year the IEEE MTT-S International Microwave Symposium (IMS) and Exhibition will be held in Philadelphia, PA at the Pennsylvania Convention Center. Although the MTT-S Symposium was hosted by the Philadelphia Chapter of MTT-S at Cherry Hill, NJ in 1976, this is the first time the IMS will be...

Philadelphia: So Much to Do, So Little Time

May 1, 2003

Walter Witt, Amplifonix

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Philadelphia, nestled between New York City and Washington, DC, has at times been overlooked or forgotten when noting major US cities. But since it is one of America's oldest cities (1682), Philly has had, I guess you could say, a little head start over other towns. No wonder she...

2003 IMS Exhibitors

May 1, 2003

Microwave Journal Staff

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The following list is complete as of April 9, 2003. 7 Layers.......... 2619 A-Alpha Waveguide Co........... 2410 AC Microwave.......... 1048 Accent Optical Technologies.......... 2010 Accumet Engineering Corp........... 2406 ACE Technology.......... 1949 Actipass Co. Ltd........... 2251 Advance Reproductions Corp........... 2404 Advanced Control Components.......... 2519 Advanced Power Technology RF.......... 1148 Advanced...

Pennsylvania Convention Center Floor Plan

May 1, 2003

Microwave Journal Staff

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Click here to view the floor plan in pdf format....

Design and Operation of Automatic Gain Control Loops for Receivers in Modern Communications Systems

This article is intended to provide insight into the effective operation of variable gain amplifiers (VGA) in automatic gain control (AGC) applications.

May 1, 2003

Dana Whitlow, Analog Devices

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This article is intended to provide insight into the effective operation of variable gain amplifiers (VGA) in automatic gain control (AGC) applications. Figure 1 is a general block diagram for an AGC loop. The input signal passes through the VGA to produce the output level to be stabilized. The...