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A new miniature wide band frequency synthesizer has been introduced that operates from 2.25 to 18 GHz, permits 3 ms tuning, exhibits a volume of 334.3cc (20.4 in 3 ), consumes just 22 W of DC power and provides a clean RF output spectrum with an absolute accuracy better...

Over the last several years, III-V heterojunction bipolar transistors (HBT) have become an increasingly important technology for a variety of rapidly growing markets. GaAs-based HBTs now play a major role in wireless communications. Key applications include power amplifiers for handset phones, wireless LAN and numerous other high speed analog...

There are a number of communications, radar and imaging applications spanning Ka-band through W-band (26 to 110 GHz) that require transmitter output powers in the range of a few watts to a few tens of watts. Vacuum-tube sources and amplifiers have long been available that can produce output power...

For specific applications, there is a need for materials or composite structures which can reflect and/or absorb the electromagnetic (EM) energy incident upon them in a desired or controllable fashion. Such reflective EM absorbing/reflecting materials 1-3 are useful in designing smart radar cross-section (smart RCS) surfaces and radio frequency...

ANTENNAS Everett, Carl L . "Using Guided Wavelength as a Basis for the Design of Dielectric Rod Antennas," No. 5, p. 222. Haupt, Randy "Generating a Plane Wave in the Near Field with a Planar Array Antenna," No. 9, p. 152. Jang, Yong-Woong and Ho-Sub Shin "A Wideband and...

The detonation by the United States of a nuclear warhead 30,000 feet above Johnston Atoll in July 1962 lit up the night sky above the Hawaiian Islands, 800 miles away. It also created a power surge that shut down the streetlights and phone system of Oahu as well as...

Baseband pulses are video or carrier-less pulses of very short duration. Their spectral content is concentrated primarily from zero frequency through the microwave region of the spectrum. This tutorial attempts to describe some of the vagaries of these pulses and their use in ground penetration radars and communications. Figure...

The setups presented are essentially of two types - thin dielectric sheet testers and z-axis testers. These are the tools that are employed to independently measure the components of the substrate dielectric constant. It is supposed that suitable propagation models may use this information to better predict propagation mode...

ASK HARLAN YOUR RF & MICROWAVE TECH Q&A RESOURCE You may know Harlan Howe from his twelve years as publisher and editor of Microwave Journal ®, or from his 34 years as a Microwave design engineer and engineering manager, or from his service as an IEEE fellow and past...

High Technology Solutions This redesigned Web site incorporates the company’s new corporate identity and integrates all the products from Aeroflex’s eight product divisions into one complete, searchable site. The home page features a snapshot of Aeroflex including: What’s New, Trade Shows, Business News, and a link to sign up...