Journal ArticleDOI
An Evaluation of Materials and Processes for Integrated Microwave Circuits
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TLDR
Sapphire and high-purity alumina (99.5 percent pure or better) substrates were found superior as substrates for microstrip circuits and vacuum deposited chromium-gold thin film which was gold electroplated and photoetched to delineate the microwave pattern.Abstract:
This paper presents an evaluation of materials and processes applicable to the fabrication of hybrid microstrip microwave circuits. Substrate materials evaluated included aluminas, beryllias, quartz, and glass of varying purities and surface finishes. Conductor materials evaluated included silver, copper, gold, and aluminum. Fabrication processes studied included vacuum deposition, sputtering, electroless and electroplating, thick-film screening and firing, and photoetching. Sapphire and high-purity alumina (99.5 percent pure or better) substrates were found superior as substrates for microstrip circuits. Conductor materials and processing methods found best were 1) vacuum deposited chromium-gold thin film which was gold electroplated and photoetched; 2) thick-film silver which was photoetched to delineate the microwave pattern.read more
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Journal ArticleDOI
A New Electroless Method for Low-Loss Microwave Integrated Circuits
S. Mahapatra,S. Prasad +1 more
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Ruthroff transmission line transformers, Guanella baluns, lowpass and bandpass filters, and balanced transmission lines using multilayer technology
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Proceedings ArticleDOI
Ceramic Microstrip For Microwave Hybrid Integrated Circuitry
TL;DR: In this article, some of the characteristics of microstrip transmission lines on homogeneous ceramic dielectric substrates and on the two-dielectric substrate is discussed along with some examples of incorporating semiconductor devices with ceramic microstrip components to accomplish high performance microwave hybrid integrated circuitry.
Proceedings ArticleDOI
Integrated S band mixers
C. Genzabella,C. Howell +1 more
TL;DR: In this article, the authors describe the approaches used and some of the results obtained building integrated mixers in S band with a unique bilithic Schottky-barrier diode chip and evaporated microstrip circuitry on alumina dielectric.
Microwave solid-state devices and circuits.
TL;DR: In this article, the progress and state-of-the-art in the areas of microwave solid-state devices and circuits are presented, and the performance of most of them is evaluated both available and predicted.