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Passive Components

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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A New Type of Amplitude Equalizer for In-band Flatness Improvement

Presentation of a cascade amplitude equalizer used for improving the performance of a bandpass filter frequency response in cellular band
February 1, 2002
Technical Feature A New Type of Amplitude Equalizer for In-band Flatness Improvement There is a growing need in modern communication systems for low cost bandpass filters of small size, high selectivity and flat passband response in order to meet the demands for inter-channel power balance, and to avoid interference....
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Technology and Innovation in Single Layer Capacitors

Introduction to the buried single layer capacitor,™ a technologically advanced device manufactured for high frequency microwave applications
February 1, 2002
Application Note Technology and Innovation in Single Layer Capacitors Lambert Devoe and Alan Devoe Presidio Components Inc. San Diego, CA Single layer capacitors have been manufactured for many years for high frequency microwave applications. The simple parallel plate structure has advantages over multi-layer capacitors up to gigahertz frequencies due...
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