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Passive Components

Monolithic RF Matrix Switches

Introduction to a new line of fully monolithic RF matrix switches for cellular infrastructure applications
April 1, 2002
Product Feature Monolithic RF Matrix Switches Peregrine Semiconductor Corp. San Diego, CA A new line of fully monolithic 4 x 6 RF matrix switches for cellular infrastructure applications has been introduced. The parts feature low insertion loss, very high port-to-port isolation and serial programmability. These designs represent the state-of-the-art...
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Temperature Variable Attentuator for Millimeter-wave Applications

A temperature variable attenuator designed for millimeter-wave applications is featured
April 1, 2002
Cover Feature Temperature Variable Attenuator for Millimeter-wave Applications EMC Technology Inc. Cherry Hill, NJ The Thermopad® temperature variable attenuator (TVA) has gained widespread popularity among RF and microwave circuit designers as a simple solution to compensate gain variation over temperature. The TVA is a special case of the absorptive...
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The Use of Intermodulation Tables for Mixer Simulations

Use of intermodulation table files to accurately predict the output frequency content of an up-converting or down-converting mixer in system simulations
April 1, 2002
Technical Feature The Use of Intermodulation Tables for Mixer Simulations The use of intermodulation table (IMT) files can lead to accurate prediction of the output frequency content of an up-converting or down-converting mixer in system simulations. For best results, custom IMT files should be constructed from mixer output spectrum...
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Software for Optimizing the Design and Low Cost Production of Waveguide Filters

Presentation of a newly released coupled-cavity filter software developed to allow optimized design of millimeter-wave waveguide bandpass filters
March 1, 2002
Product Feature Software for Optimizing the Design and Low Cost Production of Waveguide Filters Zeland Software Inc. Fremont, CA Because of their low loss and high power-handling capability, waveguide filters have been widely used in telecommunications and wireless communications systems. The key to gaining a competitive edge in the...
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Fixing the Curtice FET Model

Method used to prevent convergence difficulties in the Curtice model when parameter extraction is imperfect
March 1, 2002
Technical Feature Fixing the Curtice FET Model Convergence difficulties are common in nonlinear analyses of circuits using a Curtice model. The problem is not the model itself, but the limitations of the parameters describing the gate I/V characteristic. In this article, we show why that failure occurs, and how...
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Simulating Multi-finger HBTS

Introduction to a new model of multi-finger heterojunction bipolar transistors used to analyze and predict current collapse, bias dependence and output power
March 1, 2002
Technical Feature Simulating Multi-finger Power HBTs A new model of multi-finger heterojunction bipolar transistors (HBT) is presented to analyze and predict current collapse, bias dependence and output power. The simulation of multi-finger HBTs has proven to be very challenging in both computer-aided design and electromagnetic (EM) simulation. However, by...
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The Importance of the Current-voltage Characteristics of FETs, HEMTs, and Bipolar Transistors in Contemporary Circuit Design

Description of the application in nonlinear circuit design of an instrument which measures the dynamic large-signal characteristics of FETs, PHEMTs and bipolar transistors
March 1, 2002
Tutorial The Importance of the Current-voltage Characteristics of FETs, HEMTs and Bipolar Transistors in Contemporary Circuit Design Peter Ladbrooke and James Bridge Accent Optical Technologies Bend, OR Traditionally, when applying computer-aided methods to the design and practical realization of nonlinear circuits, the active device models required for the circuit...
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A High Gain Power Amplifier with Variable Bias for Multi-mode WCMDA Applications

A new high performance power amplifier for WCDMA applications is featured this month
February 1, 2002
Cover Feature A High Gain Power Amplifier with Variable Bias for Multi-mode WCMDA Applications RF Micro Devices Greensboro, NC This article describes a new high performance power amplifier (PA) for wideband code division multiple access (WCDMA) applications. With the transition from second generation (2G) systems, such as Global System...
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Low Phase Noise SiGe Voltage-controlled Oscillators for Wireless Applications

Description of transmit and receive voltage-controlled oscillator design solutions developed in high performance SiGe technology
February 1, 2002
Technical Feature Low Phase Noise SiGe Voltage-controlled Oscillators for Wireless Applications A low phase noise voltage-controlled oscillator (VCO) is one of the critical circuits in modern telecommunications systems. In recent years, silicon germanium (SiGe) BiCMOS technology has become one of the most promising technologies for VCO designs. This article...
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A Varactor-tuned Oscillator with Linear Tuning Characteristics

Proposed design procedure for emphasizing the tuning linearity of a varacter-tuned oscillator
February 1, 2002
Technical Feature A Varactor-tuned Oscillator with Linear Tuning Characteristic Munkyo Seo, Joo-Yeol Lee and Kyung-Kuk Lee LG Electronics Inc. Seoul, Korea Sangwook Nam Seoul National University Seoul, Korea In certain areas of microwave applications such as FMCW radars, FM modulators and phase-locked loop (PLL) circuits, the system performance is...
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