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The Book End Green's Function, Finite Elements and Microwave Planar Circuits J. Helszajn John Wiley & Sons Ltd. 259 pages; $65 Applying Green's function to planar microwave circuits is well accepted as a fundamental tool in electromagnetic analysis. This book presents comprehensive and detailed methods for describing practical microwave...

A Portable Rubidium Reference Timebase Generator United Computer and Telecommunication Inc. (UCT) Irvine, CA With today's sophisticated communications systems comes the need for better frequency accuracy, control and correlation. Rubidium-based frequency and time standards have been the ultimate accurate signal source for laboratory use, but these instruments have not...

A Wideband Synthesized Test Translator A new wideband synthesized test translator has been developed to simulate the transmission paths for direct-broadcast satellite (DBS) systems and to automate testing of set-top boxes used in broadband wireless applications. The model UC-140/1485-003 test translator provides a convenient way to characterize DBS systems...

Plastic Surface-mount Doublers That Cover Up to 6 GHz Hittite Microwave Corp. Woburn, MA Wireless communications applications continue to evolve at a furious pace. New applications are emerging endlessly such as wireless local loops and multipoint multichannel distribution systems. Wireless local area networks are increasing in frequency from 900...

A Variable Data Rate VSAT Broadband Receiver Stanford Telecom, Telecom Component Products Group Sunnyvale, CA Very small aperture terminal (VSAT) system suppliers are constantly seeking ways to keep their systems flexible and up-to-date with current and future data rate requirements. In addition, there is constant pressure to reduce system...

Microwave Applications Using Photo-imageable Technology The need to reduce manufacturing costs requires technologies that allow the integration of a microwave circuit and its associated driver on the same substrate. FODEL® photo-imageable technology, an extension of a traditional thick-film process providing a higher line resolution, has been considered in the...

A Multilayer Microstrip Patch Antenna Subarray Design Using CAD This article describes the design and development of an X-band, linearly polarized 4 × 4 element aperture-coupled microstrip patch antenna (ACMPA) subarray with a corporate feeding network. To reduce the design cycle time, commercially available CAD software packages are utilized...

Backside Connections Bill Oldfield Wiltron Co. Morgan Hill, CA The connector interface and its effect on calibration accuracy have been discussed previously. 1 This article focuses on the other side of the connector, the backside, where the connector interfaces with the circuit. It is this area where the design...

Integrated Radar Receiver Front Ends Part two of a two-part tutorial series on radar front-end components follows. Part one appeared in the January issue of Microwave Journal and discussed low noise amplifier (LNA) characteristics for radar front-end applications. This article takes a broader look at the radar receiver front...

Comparing Analog and Digital Techniques for Measuring Noise Power Ratio Generally, noise power ratio (NPR) measurement is accomplished with a diode-based noise generator as a stimulus and a spectrum analyzer for analysis. However, a digitally generated stimulus and vector signal analyzer deliver more repeatable results in less time. Roland...