Passive Components

Dual Mode Broadband Hybrids: Theory and Experiment

Development of a theoretical approach to the control and optimization of the major parameters of side and top wall hybrid couplers
Technical Feature Dual Mode Broadband Hybrids: Theory and Experiment Alex D. Lapidus Microwave Communications Company International Inc. Valencia, CA A theoretical approach to both side and top wall (hybrid) couplers based on strong experimental work is developed. Broadband operation, related to dual mode propagation through the coupling section, is...
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Implementation of a Neural Network HEMT Model into ADS

An approach for implementing a neural network algorithm to develop a large-signal HEMT model into ADS
Technical Feature Implementation of a Neural Network HEMT Model into ADS Neural network algorithms have been applied to various areas of engineering and computer science. A high electron-mobility transistor (HEMT) large-signal model has been implemented in the Advanced Design System (ADS) software package using a multilayered neural network. The...
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A Broadband Planar Isolator Using Coupled Microstrip Lines on a Magnetized Gyrotropic Substrate

Introduction to a new type of broadband isolator using nonreciprocal coupling between two microstrip lines fabricated on a magnetized gyrotropic substrate
Technical Feature A Broadband Planar Isolator Using Coupled Microstrip Lines on a Magnetized Gyrotropic Substrate A new type of broadband isolator, using coupled microstrip lines on a transversely magnetized gyrotropic substrate, is proposed in this article. The nonreciprocal coupling between two microstrip lines can be used to create an...
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Aluminum Nitride vs. Beryllium Oxide for High Power Resistor Products

Extensive study on the use aluminum nitride as an alternative to beryllium oxide for high power resistor and termination applications
Technical Feature Aluminum Nitride vs. Beryllium Oxide for High Power Resistor Products Michael Kettner, Patrick Biebersmith, Nelson Roldan And Balram K. Sharma Florida RF Labs Inc. Stuart, FL For the past few decades, beryllium oxide (BeO) has been the main substrate material used for RF resistors and terminations for...
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Rigorous Analytical Expressions for Electromagnetic Parameters of Transmission Lines: Coupled Sliced Coaxial Cable

A set of accurate closed-form formulas for primary parameter matrices and even- and odd-mode impedances for coupled sliced coaxial cables
Technical Feature Rigorous Analytical Expressions for Electromagnetic Parameters of Transmission Lines: Coupled Sliced Coaxial Cable This article is a continuation of a previous article that appeared in Microwave Journal and is the first part in the development of accurate closed-form formulas for the primary parameters (inductance [L] and capacitance...
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Coping with Hidden Spurious Harmonic Modes in the Design of Low Pass Corrugated Waveguide Filters

Proposed simulation scheme to predict the frequency band location and hidden spurious harmonic modes in low pass corrugated waveguide filters
Technical Note Coping with Hidden Spurious Harmonic Modes in the Design of Low Pass Corrugated Waveguide Filters Hidden spurious harmonic modes in corrugated waveguide filters are investigated from both theoretical and practical points of view. It has been found that multiple mode couplings occurring at more than one place...
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An Automatic Macro Program for Radio Frequency MOSFET Characteristics Analysis

Introduction to an automatic macro program used for the analysis of radio frequency MOSFETs
Technical Feature An Automatic Macro Program for Radio Frequency MOSFET Characteristics Analysis The parameter extraction language (PEL) in Agilent IC-CAP software is used to develop an automatic macro program for the analysis of the characteristics of RF MOSFETs. By using this powerful macro program, the time spent on the...
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A DC to 50 GHz and Beyond MMIC Carrier

Introduction to a novel interconnection structure for high performance and high volume DC to millimeter-wave chip carrier applications
Product Feature A DC to 50 GHz and Beyond MMIC Carrier HEI Broadband, HEI Inc. Victoria, MN With frequency spectrum demands at a premium many of today's wireless applications are moving higher and higher in frequency. Many of the systems now operate in the Ku and Ka frequency bands....
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Network Analyzer Software for Simplified Bandpass Filter Tuning

Use of newly developed filter tuning application software to accurately tune coupled-resonator bandpass filters
Product Feature Network Analyzer Software for Simplified Bandpass Filter Tuning Agilent Technologies Inc. Santa Rosa, CA Tuning the multiple poles and zeros of a coupled-resonator bandpass filter is generally labor-intensive and time-consuming. Often performed by a company's most experienced technicians armed with a vector network analyzer, such tuning requires...
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Research@mwjournal.com

Comprehensive overview of microwave technology research projects currently being investigated by European academic institutions and commercial organizations
European Supplement Research@mwjournal.com Richard Mumford Microwave Journal European Editor A commitment to well funded, focused, commercially viable research is critical to the future prosperity of the microwave industry. In this special report Microwave Journal takes a snapshot of the research projects being investigated by academic and commercial establishments across...
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