RF & Microwave Industry News

Design of a Microwave Group Delay Time Adjuster and Its Application to a Feedforward Power Amplifier

This article presents a design method for a microwave group delay time adjuster (GDTA) and its application to a feedforward (FFW) power amplifier (PA). The GDTA consists of a variable capacitor and a variable equivalent inductor. The variable equivalen...
As linear modulation and demodulation is adopted in communication systems for spectrum efficiency, the system performance is limited due to nonlinearity, particularly in the power amplifier. The nonlinearity of a system can be explained as AM-AM, AM-PM, intermodulation distortion (IMD) and adjacent channel leakage ratio (ACLR). Several linearizing techniques...
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Expert Advice Responses Page (Febuary)

Published Tuesday, Febuary 19, 2008 | Last Update 3.04.08 Here are your replies to the Febuary Expert Advice column This month, Rafi Hershtig, K&L Microwave talks About the Band-Reject Filter (BRF), or Band-Stop, is the solution of choice in an increasing number of cases. Exhibiting low loss and good...
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Skyworks Increases Shipments of GPRS Front-End Modules for SoC Applications

Mobile World Congress, Barcelona, Spain
Skyworks Solutions Inc., a developer of high performance analog and mixed signal semiconductors enabling mobile connectivity, announced that it has expanded its position in (GPRS) front-end modules (FEMs) through strategic engagements with leading system on chip (SoC) providers. To date, Skyworks has shipped more than 750 million GPRS power...
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TriQuint Launches Compact Quad-Band GSM/Edge Transmit Module

Mobile World Congress, Barcelona, Spain
TriQuint Semiconductor announced the release of its latest quad-band transmit module, the TQM6M5001, as a key member of its wideband code division multiple access (WCDMA) total RF front-end strategy. The module, in the same size footprint of its predecessor, provides full GSM/EDGE (enhanced data rates for GSM evolution) capability....
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RFMD Achieves DigRF3G Hardware Validation with Handset Baseband Manufacturer

Mobile World Congress, Barcelona, Spain
RF Micro Devices Inc. (RFMD), a designer and manufacturer of high-performance radio systems and solutions, announced the company has validated the interface between RFMD's DigRF3G-compliant RF hardware and the baseband processor IC of a top-tier cellular handset baseband manufacturer. This is one of the industry's first DigRF3G hardware validations...
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Agilent Adds WiMAX Software to Signaling Analyzer Products

Mobile World Congress, Barcelona, Spain
Agilent Technologies Inc. announced the addition of powerful and easy-to-use WiMAX analysis software to its signaling analyzer platform. Using this software and platform, service providers and network equipment manufacturers will be able to accelerate the development and deployment of WiMAX networks. Mobile WiMAX is regarded as one of key...
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Rohde & Schwarz Adds MIMO Precoding and Channel Coding to 3GPP LTE Signal Generators

Mobile World Congress, Barcelona, Spain
Rohde & Schwarz has added channel coding and MIMO precoding for up to four transmit antennas to its signal generators for 3GPP LTE (uplink and downlink). Whether mobile equipment manufacturers are looking for a unique all-in-one solution for 2x2 MIMO signals and realtime fading or simply need standard-compliant RF...
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Jazz Releases Advanced MOS Varactor Model Libraries

Jazz Semiconductor®, a developer of analog-intensive mixed-signal (AIMS) foundry solutions, announced the release of MOSVAR model libraries in its 0.13 and 0.18-micron AIMS technology platforms targeting wireless and other communication products. The new model improves simulation accuracy reducing product development time and is integrated as a standard component in...
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