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Industry News

Controlled Expansion Alloys for High Reliability Packaging Solutions

The trend towards faster and higher frequency communications is driving the search for high reliability packaging solutions that satisfy ever more demanding performance requirements. However, when utilizing the packaging materials commonly available today, designers often come up against thermal, mechanical and/or cost barriers. To meet these demands, Osprey Metals,...
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HFSS Software for Next-generation Design

When HFSS™ was introduced in February 1990, it created a new era in microwave design. Prior to this event, microwave design was limited to simple analyses and cut-and-try methods. With HFSS, engineers could conveniently build, analyze and refine three-dimensional (3D) microwave prototypes using their computers. For the first time,...
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A 28 GHz 2 x 16 Antenna T/R Switch Matrix

Fabricating a high performance 2 x 16 transmit/receive (T/R) switch to feed a millimeter-wave Rotman or Lunenburg lens antenna array has in the past been a complex and space-consuming configuration. A new T/R switch assembly has been designed that features a compact, unique package containing a 2 x 16...
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New Enhancements for the GENESYS Software Suite

All 15 modules of the GENESYS RF/microwave design software suite have recently been enhanced. For 17 years, Eagleware has worked with thousands of customers worldwide to continuously upgrade its suite of synthesis, simulation and design environment tools. Major enhancements in the current release include new models, an antenna pattern...
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A Wideband and High Gain Microstrip Four-slot Antenna Array

A numerical simulation and an experimental implementation of a cross-shaped, microstripline-fed, printed, four-element slot antenna array are presented in this article. The proposed antenna, with a relative permittivity of 4.3 and a thickness of 1.0 mm...
Since microwave communications equipment is low profile and light weight, low profile and light weight antennas are essential. A microstrip antenna has been developed to meet this requirement. Microstrip antennas offer a conformal structure, low cost and ease of integration with solid-state devices, and are low profile and lightweight....
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A Low Cost Pencil-beam Microstrip Antenna at 76.5 GHz

This article describes the design of a 76.5 GHz microstrip antenna using a simple waveguide distributor. This type of antenna permits any complicated radiation pattern to be obtained. It can be used as part of the transmit/receive module for a compact ...
The design of a millimeter-wave antenna with a pencil-beam pattern is complicated when using a slotted waveguide and results in unacceptable dissipating losses, as high as 8 to 10 dB for a microstrip (RT duroid or Cu/PTFE substrate) distributor. This is why most submillimeter-wave antenna designers avoid traditional VHF...
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Development of an Advanced Airborne Precipitation Radar

Radar has been used for observation of weather since the 1940s. 1 Advances in weather radar include the incorporation of Doppler capability, which allows measurement of wind velocity, and the use of multiple polarizations, which enhance rainfall estimation and provide the ability to discriminate between types of hydrometeors, such...
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A 2.4 GHz CMOS Power Amplifier with 20 dBm Output Power for Bluetooth and WLAN Applications

This article presents a 2.4 GHz CMOS power amplifier (PA) with an output power of 20 dBm using a 0.25 µm 1P5M standard CMOS process. The PA uses a diode connected NMOS transistor functioning as a diode linearizer. It is believed that this is the first ...
Due to the fast development of wireless communications, a low cost, high performance, high integration technology is needed for system on a chip (SOC) implementation. The CMOS technology provides a good solution for SOC integration. 1 Recent improvements of the standard CMOS process make it possible to implement RF...
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An RF Module Design for a Multi-mode Handset

This article describes a novel design of an RF module for a multi-mode handset and presents an example of an RF module for a W-CDMA/GSM/DCS tri-band and dual-mode handset. The entire module, including a direct modulation transmitter and a superheterody...
The number of mobile users is predicted to reach 1.7 billion by the year 2010. More than 45 percent of them will use high data speed services. W-CDMA, proposed by IMT2000, has become the most practical and important system for the development of new wireless communications. Nevertheless, second generation...
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Trends in Antennas for Wireless Communications

Examination of a series of innovative approaches in use to meet the demand for antennas that include small size, wide bandwidth, high gain and adaptive pattern control
From mobile telephones to wireless Internet access to networked appliances and peripherals, there is an increasing reliance on wireless communications to provide or enhance functionality for products and services. The wireless communications industry continues to generate new products and applications for consumers and new opportunities for businesses. The enormity...
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