Microwave Journal articles from January 1998

Microwave Journal archives from January 1998

Thin dielectric radome design guidelines for SATCOM antennas. (satellite communications)
January 1, 1998... For most antenna applications, a thin dielectric radome is used to protect the radiating elements from the outdoor environment. An ideal radome is electrically transparent to RF and, therefore, does not affect the antenna's radiating pattern...

Double-Y baluns for MMICs and wireless applications.(Wireless Report)
January 1, 1998... Balun circuits find wide application in a variety of important microwave components such as balanced mixers, push-pull amplifiers, multipliers, antennas and other applications requiring conversion between an unbalanced transmission line, such as...

An AIGaAs/GaAs HBT PA-LNA transceiver MMIC chip for 1.9 GHz PHS digital cordless telephones. (heterojunction bipolar transistor; power amplifier-low noise amplifier; personal handyphone system; microwave integrated circuits)(Wireless Report)
January 1, 1998... 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...

Design options for SAW IF filters used in wireless applications. (surface acoustic wave)(Wireless Report)
January 1, 1998... With the wireless industry poised for exponential growth, the trend in the various wireless equipment is toward miniaturization. Thus, components used in this equipment are under constant pressure to become smaller. SAW filters that are used...

A review of the 1997 Wireless Workshop.(Wireless Report)
January 1, 1998... 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...

1998 wireless/portable by design exhibition showcase. (tabular data only)(Wireless Report)(Directory)
January 1, 1998... * S-PARAMETER DISK American Technical Ceramics (ATC) Wireless Exhibition 633,635 This new S-Parameter disk contains files with two-port descriptions for the company's multilayer capacitors. Each S-Parameter file corresponds to a specific...

Ball grid arrays: a DC to 31.5 GHz low cost packaging solution for microwave and mm-wave MMICs. (microwave integrated circuits)
January 1, 1998... The burgeoning wireless market encompassing voice, video and high speed data transfer is creating an ever-increasing demand for high speed GaAs semiconductor ICs. In turn, this requirement has created a need for low cost, easy-to-use MMIC...

Experimental performance of an L-band microstrip antenna.
January 1, 1998... Microstrip patch antennas have many attractive features such as low profile, light weight and small size. In addition, they are able to conform to the body of a host object and are inexpensive to manufacture compared to other types of...

A quadrafilar helical antenna for low elevation GPS applications. (Global Positioning System)
January 1, 1998... DGPS technologies are being used extensively for various commercial services related to geophysical surveying and mapping, geographic information management, construction and farming. For such applications at remote sites, these services rely on...

Antenna basics.
January 1, 1998... An antenna is a device that transforms impedance and directs RF and/or microwave energy. This definition points out the twofold nature of most antennas and leads into the article's first topic: the antenna's impedance-matching function....

Increased speed and performance from an RF VNA. (radio frequency; vector network analyzer)(Cover Story)
January 1, 1998... The introduction of the original model HP 8753A vector network analyzer (VNA) in 1986 marked the first offering of a compact VNA with an integrated synthesized source and comprehensive capabilities such as direct measurement of group delay and...

An ultra-thin silicon technology that provides integration solutions on standard CMOS. (complementary metal oxide semiconductor)
January 1, 1998... System engineers and microwave designers are fighting a constant battle to increase the integration, size, cost effectiveness and power savings of wireless devices while simultaneously maintaining and even improving performance. Historically,...

An IFM receiver on a single PCB. (instantaneous frequency measurement; printed circuit board)
January 1, 1998... Instantaneous frequency measurement (IFM) devices traditionally have been large, cumbersome assemblies comprising multiple PCBs with the RF sections, and analog and digital circuitry located on separate boards. This configuration is both...

Ultraminiature, high reliability RF bypass relays. (radio frequency)
January 1, 1998... Double-pole double-throw (DPDT) relays have long been used as the switching mechanism for applications such as attenuators, circuit and component bypassing and other specialized circuits such as selecting between unity and a preset amplifier...

A GPS chipset with low power consumption. (global positioning system)
January 1, 1998... The advent of global positioning system (GPS) products into consumer applications has created the need for low power, small, low priced components for use in battery-operated devices. The SiRFstar[TM]I/LX chipset and software is a...