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Industry News

Dual-band GSM/PCS Handset Antennas

A new dual-band antenna set that uses a descending- pitch helical configuration to overcome the problem of a helical antenna tuned and matched to the PCS at 1800 MHz that has too much of a capacitive component at GSM frequencies
Ace Antenna Co.
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Dual-band GSM/PCS Handset Antennas Ace Antenna Co. Chatsworth, CA Today's new cellular telephone must be capable of operating in two distinct frequency bands to be compatible with the various operating systems it is likely to encounter. As a result, the unit's single-handset antenna must perform efficiently and effectively within...
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A 2 kW Solid-state Pulse Amplifier

A stand-alone, 19-inch, rack-mount power amplifier system capable of amplifying RF pulses to a level in excess of 2000 W peak power with five percent duty cycle
Wavesat Telecom
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A 2 kW Solid-state Pulse Amplifier Wavesat Te´le´com Inc. St-Laurent, Quebec, Canada The model WPA-129063-53PR solid-state power amplifier system is a stand-alone, 19" rack-mount unit capable of amplifying RF pulses to a level in excess of 2000 W peak power with five percent duty cycle (100 W average power)....
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Test Equipment Synchronization: Problems and Solutions

Issues to be dealt with while running CDMA tests as well as some suggested solutions
Boris Sheyer
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Technical Feature Test Equipment Synchronization: Problems and Solutions Boris Sheyer Please click here to view the pdf file of the Technical Feature...
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Testing of Smart Antenna Systems

Key tests that can be performed on switched beam systems, which are considered the simplest, but most popular, smart antenna technologies
David Robbins and Moeness G. Amin
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Testing of Smart Antenna Systems Smart antenna systems must be tested to verify the various claims made by the system designer and manufacturer. The tests should be performed primarily to evaluate the most and least successful functions of the system under consideration. Extensive testing should also establish the best...
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Experimental Adaptive Nulling with a Genetic Algorithm

Application of a genetic algorithm with an experimental antenna for placing a null in the direction of an interference source
Ranfy Haupt and Hugh Southall
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Experimental Adaptive Nulling with a Genetic Algorithm An adaptive antenna system rejects interference by placing a null in its antenna pattern in the direction of the interfering source. A single-element antenna needs at least one other element or some scattering object to form a null. Thus, adaptive antennas are...
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Broadside Radar Echoes from Wires and Strings

Simple formulas for calculating the broadside radar cross section of both metal wires and strings
E.F. Knott, A.W. Reed and P.S.P. Wei
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Technical Feature Broadside Radar Echoes from Wires and Strings E.F. Knott, A.W. Reed and P.S.P Wei Please click here to view the pdf file of the Technical Feature...
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A Novel Tapered Slot PCS Antenna Array and Model

A modification to the conventional tapered slot aperature that results in improved SWR performance as well as an acute radiation pattern prediction of tapered slot antenna arrays
Ronald A. Marino
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A Novel Tapered Slot PCS Antenna Array and Model An antenna array comprising multiple tapered slot radiators and its microstrip feed network has the capability to be etched on a single piece of thin dielectric circuit board, resulting in the relatively inexpensive mass production of a highly consistent product....
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Near-field Focusing of a High Field EMC Test Antenna

A novel antenna for high field strength electromagnetic compatibility (EMC) susceptibility testing
John M. Seavey
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Near-field Focusing of a High Field EMC Test Antenna This article describes a novel antenna for high field strength electromagnetic compatibility (EMC) susceptibility testing. The antenna system includes a small parabolic antenna and a set of five interchangeable feeds located laterally and axially off the reflector axis. The antenna...
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Network Analyzer Measurements

RF and microwave production testing and ways to reduce its contribution to manufacturing time while maintaining accuracy
Mirin Lew
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Network Analyzer Measurements Mirin Lew Hewlett-Packard Co., Microwave Instruments Division Santa Rosa, CA Increased manufacturing throughput is one of the keys to achieving success in high volume, low cost markets such as wireless communications. As part of the manufacturing process, component and subsystem testing can either increase or decrease...
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A Microstrip Patch Antenna Using Novel Photonic Band-gap Structures

A novel two-dimensional photonic band-gap lattice and its application in microstrip patch antenna design
Yongxi Qian, Roberto Coccioli, Dan Sievenpiper, Vesna Radisic, Eli Yablonovitch and Tatsu Itoh
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A Microstrip Patch Antenna Using Novel Photonic Band-gap Structures The microstrip patch is one of the most preferred antenna structures for low cost and compact design of wireless communication systems and RF sensors. However, as applications move to higher frequencies, conventional patch antenna designs encounter severe limitations such as...
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