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Industry News

FM/FSK ICs for a Complete UHF Radio Transceiver

Two ICs that can be integrated to form a transceiver capable of transmittingand receiving FM or frequency-shift keying (FSK) signals at 860 to 965 MHz
FM/FSK ICs for a Complete UHF Radio Transceiver MX-COM Inc. Winston-Salem, NC The industrial, scientific and medical (ISM) frequencies in the 900 MHz region and the European 868 to 870 MHz bands have been proving ground for a wide array of communications systems, from medical and industrial telemetry to...
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WLAN Directional Panel Antennas with Superior Gain and Small Size

A new series of compact directional panel antennas for wireless local area network (WLAN) applications over the 2.4 GHz industrial, scientific and medical band
WLAN Directional Panel Antennas with Superior Gain and Small Size MAXRAD Inc. Hanover Park, IL A new series of compact directional panel antennas for wireless local area network (WLAN) applications over the 2.4 GHz industrial, scientific and medical (ISM) band has been introduced that features a patent-pending printed circuit...
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Prematching Tuners for Very High SWR and Power Load Pull Measurements

This month's cover features programmable prematching tuners that use a new calibration technique and interpolation routines with fine tuning resolution equivalent to manual tuners
Prematching Tuners for Very High SWR and Power Load Pull Measurements Focus Microwaves Ville St-Laurent, Quebec, Canada Load pull testing of high power transistors in the PCS and cellular frequency range (0.85 to 3 GHz) requires accurate tuning capability around 1 W output impedance or less. Meanwhile, RF power...
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High Power, Low Cost Ceramic Quadrature Couplers

Cellular and PCS ceramic quadrature couplers developed using a plated and bonded copper on ceramic process that provides 50 to 100 percent more power handling capability with little or no increase in size
High Power, Low Cost Ceramic Quadrature Couplers CirQon Technologies Corp. Gurnee, IL Many of today’s high power amplifiers for cellular and PCS base station use are assembled in a network composed of several medium power amplifier stages coupled with 90° quadrature hybrids or couplers. The quadrature couplers are preferred...
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A Transmit Frequency Converter for LMDS Set Top Box Applications

A frequency converter module set suitable for use in set top boxes in local multipoint distribution system (LDMS) applications
A Transmit Frequency Converter for LMDS Set Top Box Applications Vari-L Company Inc. Denver, CO A frequency converter module set suitable for set top boxes used in local multipoint distribution system (LMDS) applications has been developed. The module set has been designed in accordance with the standards established by...
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A High Stability Phase-locked Source for QAM Radio Application

A new 9 to 13 GHz high stability, low noise phase- locked source that addresses the 155 Mbps data rate requirements of quadrature amplitude modulation (QAM) radios
A High Stability Phase-locked Source for QAM Radio Applications Microwave dB Newbury Park, CA Consumers have pressured service providers who, in turn, have pressured equipment manufacturers to design wireless communications systems that are more reliable while simultaneously demanding significantly higher data rates. This new generation of radios provides high...
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New Fractal Antennas for Compact and Versatile Telecommunication Services

Base station multiband antennas based on the fractal-shaped antenna concept that operate concurrently at the GSM 900 and GSM 1800 bands
New Fractal Antennas for Compact and Versatile Telecommunication Services Fractus SA Barcelona, Spain The wireless telecommunication market is constantly subjected to turbulent and rapid changes. Today’s telecom applications require total mobility as well as constant improvement toward the integration of multiple services. These features, accompanied by an ongoing cost...
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Design of an Ultralinear Wideband Feedforward Amplifier Using EDA Tools

An electronic design automation (EDA)-based method to design an ultralinear wideband feedforward amplifier in the 460 MHz grequency band
Technical Feature Design of an Ultralinear Wideband Feedforward Amplifier Using EDA Tools Jianyi Zhou, Limin Feng, Xiaowei Zhu and Wei Hong Please click here to view the pdf file of the Technical Feature...
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Microwave FET Oscillators: An Analytic Approach to Simplify Computer-aided Design

A simple analytic approach to microwave FET oscillator design that defines explicit expressions for optimum values of feedback elements through transistor Z parameters
Technical Feature Microwave FET Oscillators: An Analytic Approach to Simplify Computer-aided Design Andrey V. Grebennikov Please click here to view the pdf file of the Technical Feature...
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Phase Noise Theory and Measurements: A Short Review

Phase noise theory, phase noise modeling of a VCO and phase-locked loop source with a focus on practical considerations and the various methods used to measure phase noise
Tutorial Phase Noise Theory and Measurements: A Short Review Bar-Giora Goldberg Please click here to view the pdf file of the Tutorial...
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