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For the effective use of the available frequency spectrums, the channels of conventional communications satellite systems are allocated contiguously in frequency. Each channel is filtered by a channel filter with high frequency selectivity, amplified by a high power amplifier and transmitted to the ground through a single beam. Modern...

Rapidly growing wireless systems call for low loss filters with special requirements such as a suppressed second harmonic and a wide stop band region. Although conventional parallel coupled-line filters have many salient features, 1 their spurious response at 2f o make them unsuitable for modern day wireless systems. This...

In the RF and wireless industries, system performance requirements seem to expand almost daily. These systems continue to encompass more and more of today’s broad-reaching technologies. Engineers working in this environment are often tasked with designs that must combine and distribute RF signals from multiple input devices while, at...

Military Brochure The revised military brochure from AR Worldwide Modular RF features a family of booster amplifiers for tactical military radios that covers 30 to 512 MHz and 12 to 40 W. The family features several versions including manpack or vehicular mounted, manual or automatic band switching and a...

Space/Flight Qualified Low Noise Amplifiers These low noise amplifiers are designed, manufactured, tested and screened to be extremely reliable and rugged for space or flight applications. Screening options include MIL-STD-883 and MIL-PRF-38534. In addition to the testing and standards that go into these amps, the company also provides complete...

Modern Microwave and Millimeter-Wave Power Electronics Robert J. Barker, John H. Booske, Neville C. Luhmann, Jr. and Gregory S. Nusinovich, Editors Wiley Interscience • 864 pages; $145 The designers of present and future microwave and millimeter-wave power electronics systems need to be aware of the unique and rich characteristics...

TNO is to participate in a Dutch consortium on biomedical materials. The BioMedical Materials consortium (BMM) aims to provide a leadership position to the Netherlands in biomedical materials and will facilitate novel product development for various medical applications. The BMM will use public-private partnerships to fully utilize the strong...

Published June 30, 2006 From: Jean Almira, Eudyna Devices Asia Singapore Dear Harlan, I would like to ask your advice regarding directional couplers. I am confused about backward wave couplers and forward wave couplers. I have read some articles: waveguide couplers in the forward direction (forward wave couplers) and...

TriQuint Semiconductor Inc. , a supplier of wireless handset RF front-end modules and network base station components, announced the intent to open a new design and support center in High Point, North Carolina. The facility will be known as the North Carolina Design Center (NCDC), and is part of...

L-3 Communications announced that its Interstate Electronics Corp. (IEC) subsidiary was awarded $37 M for the first phase of the US Air Force Modernized USER Equipment (MUE) Program by the US Air Force NAVSTAR Global Positioning System (GPS) Joint Program Office. The total potential contract value for IEC, including...