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Technical Feature Intermodulation Products for a Mixer Subjected to a Multi-carrier Signal Applying a multi-carrier signal to a mixer leads to a large range of intermodulation products. To perform a link budget of a multi-carrier transmit-receive system, it is important to predict the location and magnitude of those intermodulation...

Product Feature Cost-effective Wireless Antenna Measurement Systems MI Technologies Duluth, GA Two new antenna measurement systems have recently been introduced that add to the MI-3600 antenna measurement product line. The MI-3600 family is comprised of 20 antenna measurement systems for single- or dual-axis antenna pattern measurements in the popular...

Product Feature A CMOS-based Front-end Downconverter for GPS Applications Valence Semiconductor Irvine, CA The industry is striving for single-chip Global Positioning System (GPS) designs given the limited real estate available within cell phones, personal digital assistants (PDA) and other consumer electronic devices. Since GPS designs are typically comprised of...

Technical Feature Antenna Selection to Minimize Pointing Requirements Traditionally, when designing a satellite communications system, an allowance is made in the link budget for pointing loss. The earth station's antenna size is then selected to achieve the desired gain margin. In this article, a different approach called antenna optimization...

Technical Feature A Feedforward Power Amplifier with Loops to Reduce RX Band Noise and Intermodulation Distortion This article proposes a new power amplifier approach for the reduction of amplified noise signals in the receiver (RX) band as well as intermodulation distortion signals in the transmitter (TX) band using a...

Technical Feature Topics in Communication System Design: Carrier Triple Beats Howard Hausman Miteq Inc. Hauppauge, NY Intermodulation interference is typically calculated based on two signals present in the RF or IF bandwidth. When the bandwidth is less than an octave, even-order intermodulation products, such as second- and fourth-order intermodulation...

Product Feature A Hardware Multichannel Simulator for Wideband Wireless Systems Elektrobit Kauniainen, Finland Hardware-based multipath fading simulators have traditionally been used to generate up to two simultaneous fading channels. Mobile network testing and future wireless applications like geolocation, smart antennas and multiple input multiple output (MIMO) systems, however, require...

Cover Feature Vector Network Analyzers For Measurements to 50 GHz Agilent Technologies Inc. Santa Rosa, CA The HP 8510 vector network analyzer introduced by Hewlett-Packard in 1985 revolutionized microwave measurements by combining advanced techniques for characterizing components with the computational power afforded by the microprocessor. For the first time,...

Product Feature An Ultra-linear 3G Power Amplifier Unity Wireless Systems Corp. Burnaby, B.C., Canada Fig. 1 The amplifier's typical intermodulation performance. Third Generation (3G) wireless is the next phase in wireless communications, defined by the migration to packet-switched networks at high speed data rates. 3G capability will be a...

Technical Feature Orthogonal Frequency Division Multiplex Overview Ali Zamanian Fluor Corp. Wireless broadband, also called wireless cable, was developed to provide local access to small business and residential users for the delivery of high quality digital data, video and voice services. Orthogonal frequency division multiplex (OFDM) is a modulation...