advertisment Advertisement
This ad will close in  seconds. Skip now
advertisment Advertisement
advertisment Advertisement
advertisment Advertisement
advertisment Advertisement

Industry News

An Actively-controlled Microwave Reflecting Surface with Binary-pattern Modulation

This article describes an actively-controlled reflecting surface, capable of modulating the microwave energy incident upon it. The surface is a composite structure holding an array of conventional semiconductor diodes excited with a set of pulses in a ...
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...
Read More

2003 Editorial Index

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...
Read More

Flash in the Plan

Directed-energy weapons remain more experimental than available.
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...
Read More

A Brief Exposure to Ultra-wideband Signaling

Ultra-wideband (UWB) techniques are based on the generation of extremely short digital pulses in the sub-nanosecond range (1 to 1000 picoseconds). The technology is vastly different from classical radio transmission. The extremely short pulses are gene...
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...
Read More

Cavity Techniques for Substrate Properties at Microwave/Millimeter-wave Bands

For quality control in the design of microwave and millimeter-wave circuitry and devices, it is important to have a good measure of the dielectric properties of the materials employed. The standards and methods that are often employed for this purpose ...
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...
Read More

Ask Harlan: December 9, 2003

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...
Read More

Ask Harlan: December 16, 2003

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...
Read More

Ask Harlan: January 13, 2004

Dear Khalid, <P> In my view, the hot topics are nanotechnology, continued compound semiconductor research and MEMS.
HARLAN HOWE Click here to submit your question to Harlan now . 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...
Read More

Sign-In

Forgot your password?

No Account? Sign Up!

Get access to premium content and e-newsletters by registering on the web site.  You can also subscribe to Microwave Journal magazine.

Sign-Up

advertisment Advertisement