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Industry News

A 17 to 27 GHz GaAs MMIC Gain Block Amplifier from Multiple Sources

Development of GaAs MMIC three-stage gain block amplifier covering the 17 to 27 GHz frequency range
Mimix Broadband
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PRODUCT FEATURE A 17 to 27 GHz GaAs MMIC Gain Block Amplifier from Multiple Sources Mimix Broadband Webster, TX A GaAs MMIC three-stage gain block amplifier covering the 17 to 27 GHz frequency range has been developed that features the option of individually biasing the three stages or biasing...
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Finite Element Determination of the Intrinsic Small-signal Equivalent Circuit of MESFETs

Description of a theoretical procedure used to calculate the intrinsic elements of a FET small-signal equivalent circuit
M. Kameche, M. Feham
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TECHNICAL FEATURE Finite Element Determination of the Intrinsic Small-signal Equivalent Circuit of MESFETs The finite element time domain method is used to determine the intrinsic elements of a broadband, small-signal equivalent circuit (SSEC) of FETs. The values of the different elements are calculated from the Y parameters of the...
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A New Spread-spectrum Measurement Method for Satellite Transponder In-orbit Testing

Introduction to a new measurement method for beginning-of-life and in-service testing of satellite transponders that utilizes spread-spectrum signals
Thomas Kleine-Ostmann, Buy Harles
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A New Spread-spectrum Measurement Method for Satellite Transponder In-orbit Testing This article introduces a new measurement method for beginning-of-life and in-service testing of satellite transponders that utilizes spread-spectrum signals. The basics of this new method, which permit measurement of amplitude and group delay of a transponder channel, are presented....
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A High Efficiency Bow-tie Antenna for Impulse Propagation

Presentation of experimental data used to improve the time domain characteristics of a bow-tie antenna
Roger Clarke
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TECHNICAL FEATURE A High Efficiency Bow-tie Antenna for Impulse Propagation An investigation into the problems associated with using modified dipole antennas to propagate temporally short electrical impulses is described. Experimental data is presented which shows that the time domain characteristics of the bow-tie antenna can be improved by reactively...
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A Method of Measuring Large-signal S-parameters of High Power Transistors

Determination of large-signal scattering parameters of high power transistors from measured data during normal operation
Seok Kyun Park, Ik Soo Chang, Yun Seo Choi, Jun Won Huh, Young Kim
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TECHNICAL FEATURE A Method of Measuring Large-signal S-parameters of High Power Transistors A measurement method for scattering parameters (S-parameters) of high power transistors is presented. The proposed method directly determines the S-parameters of high power transistors by measuring overall gain, phase and S-parameters of input and output matching network...
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Improved Gain for a Dynamic Envelope Tracking Amplifier in Cellular Radio Handsets

Use of varactor diode to improve gain in an envelope tracking amplifier in third generation cellular phones
In-ho Kang, Joo-yeon Kim
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TECHNICAL FEATURE Improved Gain for a Dynamic Envelope Tracking Amplifier in Cellular Radio Handsets An envelope tracking (ET) amplifier with variable bias voltage is a potentially more efficient power amplifier technique for third generation cellular phones. However, the input and output impedances of the transistors vary with the bias...
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Design of a Planar Microstrip Balun at S-band

Design, simulation and measured results of a planar microstrip balun at S-band
Jwo-Shiun Sun, Tsung-Lin Lee
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TECHNICAL FEATURE Design of a Planar Microstrip Balun at S-band An innovation for the Marchand balun model is presented. The structure of the designed planar microstrip matching circuit is fairly simple, practical and easily fabricated without requiring complex multiple metal or dielectric layers. Moreover, the designed balun performs well....
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IMS 2001: Chicken Little Was Wrong

No, the sky isn't falling, not after another successful show at the 2001 International Microwave Symposium (IMS) and Exhibition held May 20 to 25 in Phoenix
Frank Bashore
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IMS 2001: Chicken Little Was Wrong Frank Bashore Microwave Journal staff How can the sky be falling on the RF/microwave industry when over 11,000 participants braved 100°+ heat to attend Microwave Week in Phoenix in May? IMS 2001 was the biggest and best symposium and exhibition yet, and the...
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The Bookend

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THE BOOKEND * Radio-Electronic Transmission Fundamentals B. Whitfield Griffith, Jr. Noble Publishing Corp. 648 pages; $75 ISBN: 1-884932-13-4 This is a reprint of a textbook originally published in 1962. It is intended to bridge the gap between the elementary and advanced technical works pertaining to the generation and transmission...
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Around the Circuit

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AROUND THE CIRCUIT INDUSTRY NEWS * Plexus Corp. completed its previously announced acquisition of electronic manufacturing services provider Qtron Inc. Plexus paid approximately $30 M in cash and assumed approximately $17 M in debt, in addition to Qtron's ordinary trade payables. The acquisition was financed through Plexus' existing capital...
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