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Passive Components

Design of Bias Tees for a Pulsed-bias, Pulsed-RF Test System Using Accurate Component Models

In this article, a design of custom bias tees to be used in a pulsed-bias, pulsed-RF measurement system is described. The bias tee design is such that the DC path allows bias pulses to pass through to the device unchanged, while still allowing RF measu...
Charles Baylis University of South Florida Tampa, FL; Lawrence Dunleavy University of South Florida and Modelithics Inc.Tampa, FL; William Clausen Mod
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This article describes the design of a bias tee for a pulsed-bias, pulsed-RF test system. The cut-off frequency of the DC path was raised to allow pulsing of the bias signal. The theory of bias tee design for pulsed measurements is first presented. The simulation results for the design...
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Novel Low Pass Filters Using a Defected Microstrip Structure

In this article, the stop-band characteristics of a novel defected microstrip structure (DMS) are studied and its application to a low pass filter is proposed. The equivalent circuit model of the unit defected microstrip structure is used to explain th...
Sheng Zhang, Jian-Kang Xiao, Zi-Hua Wang and Ying Li, Shanghai University Shanghai, China
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A novel defected microstrip structure (DMS), which behaves in a way similar to the known defected ground structure (DGS) unit cell, 1–10 is studied in this article. The unit DMS 3,4 is made by etching slots in the microstrip line, which then exhibits the property of rejecting microwaves at...
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Rigorous Analytical Expressions for the Electromagnetic Parameters of Rectangular Coaxial Couplers with Circular and Square Inner Conductors

<p>This article presents a set of accurate closed-form formulas for the primary parameters (inductance [L] and capacitance [C] matrices) and the impedances (Z<span class="storybodysubscript">oe</span>, Z<span class="storybodysubscript">oo</span>) of th...
N. Benahmed and S. Seghier, University of Tlemcen
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The electrical properties of a loss-less coupler, using TEM mode coupled lines, can be described in terms of even- (Z oe ) and odd- (Z oo ) mode impedances and its primary parameters [L] and [C] matrices 2 where L o and C o are the proper inductance and...
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A Dual-band Branch-line Coupler Using Quasi-composite Right/Left-handed Transmission Lines

A quasi-RH/LH dual-band 3 dB branch-line coupler (BLC) constructed in microstrip form is proposed. The designed BLC circuit replaces the conventional chip inductors in the coupler arms with microstrip stubs for easier circuit integration and lower fabr...
He-Kai Jhuang and Ching-Her Lee, National Changhua University of Education; Po-Min Hu and Chung-I G. Hsu, Da-Yeh University
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Branch-line couplers (BLC) are widely used as 90° signal dividers in microwave and millimeter-wave circuits. A BLC can provide two quadrature-phased signals from a single local oscillator for use in image rejection mixers. 1 It can be used as part of the feeding network for antennas to produce circularly...
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NEW BROCHURE DETAILS PASSIVE COMPONENT AND CONNECTIVITY PRODUCTS AND CAPABILITIES

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Response Microwave, Inc. a global specialist in providing RF/Microwave customer solutions, is pleased to announce the availability of its new product selection guide.
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RFMW ANNOUNCES DISTRIBUTION AGREEMENT WITH EMC TECHNOLOGY

Micrwoave Journal
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RFMW Ltd. announced that it has signed a distribution agreement for the Americas with EMC Technology Inc., a manufacturer of RF/microwave surface-mount terminations, attenuators and resistive products.

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The Grid Amplifier: Enabling High Power Millimeter-wave Systems

James J. Rosenberg, Michael P. DeLisio and Blythe C. Deckman Wavestream Corp., Chun-Tung Cheung and David B. Rutledge California Institute of Technolo
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There are a number of communications, radar and imaging applications spanning Ka-band through W-band (26 to 110 GHz) that require transmitter output powers in the range of a few watts to a few tens of watts. Vacuum-tube sources and amplifiers have long been available that can produce output power...
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An Actively-controlled Microwave Reflecting Surface with Binary-pattern Modulation

This article describes an actively-controlled reflecting surface, capable of modulating the microwave energy incident upon it. The surface is a composite structure holding an array of conventional semiconductor diodes excited with a set of pulses in a ...
P.S. Neelakanta, A.K. Stampalia and D. De Groff, Florida Atlantic University
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For specific applications, there is a need for materials or composite structures which can reflect and/or absorb the electromagnetic (EM) energy incident upon them in a desired or controllable fashion. Such reflective EM absorbing/reflecting materials 1-3 are useful in designing smart radar cross-section (smart RCS) surfaces and radio frequency...
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Subminiature Broadband Coaxial Switches for VXI Applications

Dow-Key Microwave Corp.
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In recent years the VXIbus architecture has proven to be a versatile interface standard for instruments from many diverse manufacturers to operate within the same mainframe. The VXIbus incorporates the user-friendly features of instruments designed to operate within the General Purpose Interface Bus (GPIB) (for example, using ASCII-level programming)...
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Ultra-low ESR Microwave Multilater Capacitors

Dielectric Laboratories Inc.
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A family of Ultra-low ESR products has been introduced that set a new standard for low loss microwave performance. The equivalent series resistance (ESR) is half that of previous products. The series, designated UL (Ultra-low), is currently available in both 0603 and 0505 case sizes with addition parts to...
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