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An AlGaAs/GaAs HBT PA-LNA Transceiver MMIC Chip for 1.9 GHz PHS Digital Cordless Telephones The first results of a GaAs heterojunction bipolar transistor (HBT) power amplifier (PA)-low noise amplifier (LNA) integrated MMIC transceiver, developed for the Japanese 1.9 GHz personal handyphone system (PHS) digital cordless telephone, are reported. The...

A Review of the 1997 Wireless Workshop Frank Bashore Microwave Journal Staff The 1997 Wireless Workshop was held October 26–29 to serve as a technical forum for approximately 85 engineering and technical representatives of leading companies involved in the design and manufacturing of materials and circuits for today's wireless...

A Quadrafilar Helical Antenna for Low Elevation GPS Applications This article presents a low cost implementation of a quadrafilar helical antenna for Global Positioning System (GPS) applications. The antenna is designed to produce a right-hand circularly polarized (RHCP), elevated omnidirectional radiation pattern with constant azimuth gain at low elevation...

Ball Grid Arrays: A DC to 31.5 GHz Low Cost Packaging Solution for Microwave and mm-wave MMICs The VIA/PAK™ ball grid array (VBGA) surface-mount packaging technology for high frequency RF and mm-wave applications is described in this article. The package was developed for the frequency range from DC to...

Around the Circuit INDUSTRY NEWS Microwave multifunction module designer and manufacturer REMEC Inc. , San Diego, CA, has completed its merger with Q-bit Corp. and its acquisition of Nanowave Technologies Inc. Details of the transactions were not disclosed. Siemens Matsushita Components GmbH & Co. KG (S+M) , Munich, Germany,...

New Literature Programmable Power Supply Brochure This four-page brochure details the company's PowerDigm line of programmable power supplies, including DC power and switching power supplies, and programmable loads. Key features are listed. Product photographs are provided. American Reliance Inc. (AMREL), Arcadia, CA (800) 654-9838 or (818) 303-6688. Clamp Catalog...

Components High Power Limiter The model ACLM-4932HC24 high power limiter operates over the frequency range from 0.002 to 1.5 GHz. The limiter offers 100 W of CW power protection and 100 W (peak) at a pulse width of 1 ms. Other pulse power-handling capabilities include 600 W (peak) at...

Antennas 806 - 902 MHz Directional Yagi Antenna The model PC804N directional Yagi antenna provides for reception and transmission in the 806 to 902 MHz frequency band and is designed to be completely weatherproof. Complete weatherproofing is achieved by enclosing the feed system in a potted PVC radome that...

Amplifiers DC - 4 GHz HBT GaAs MMIC Amplifier The model AHB107 monolithic heterojunction bipolar transistor (HBT) Darlington amplifier is designed for use as a general-purpose 50 W gain block. External DC blocking capacitors determine low frequency response and an external bias resistor provides bias voltage flexibility. Features include...

Devices MESFET The NEC model NE72118 MESFET delivers power gain performance of 5.5 dB at 12 GHz, making it suitable for use as the oscillator stage in low noise block applications for direct-broadcast satellite receivers. It is housed in a miniature, four-pin SOT-343 plastic surface-mount package and can be...