paper 150204233645

Published: 2015-07-09

Compact Waveguide Load with Thin Film Resistor

Changsoo Kwak,

Changsoo Kwak

Electronics and Telecommunications Research Institute, Korea

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Hongyeal Lee,

Hongyeal Lee

Electronics and Telecommunications Research Institute, Korea

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ManSeok Uhm,

ManSeok Uhm

Electronics and Telecommunications Research Institute, South Korea

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In-Bok Yom,

In-Bok Yom

Electronics and Telecommunications Research Institute, Korea

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Sohyeun Yun

Electronics and Telecommunications Research Institute, Korea

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Proceedings of 2015 Photonics & Electromagnetics Research Symposium, Prague, July 6 - 9，Page(s)1402-1405

Abstract

In this paper, we present a compact rectangular waveguide load using tantalum nitride (TaN) thin film resistor (TFR) as an absorber for Ka band applications. The TFR having good temperature coefficient and stable performances is attached on an alumina substrate. It can be easily attached to an end wall of a waveguide for connecting an adjacent waveguide flange. To achieve good impedance matching over a wide frequency range, we put TFR with stepped shape at the center of waveguide. It is designed with an alumina substrate with TaN TFR. The actual size of the 5 mil alumina substrate with sheet resistance of 100 Ω/sq is 3.5 mm × 9.0 mm. Verification of the design results has been carried out by fabrication and measurement of the waveguide load. Return loss above 20.0 dB has been obtained over frequency range of 4.0 GHz in the Ka band.

Citation

Changsoo Kwak, Hongyeal Lee, ManSeok Uhm, In-Bok Yom, and Sohyeun Yun, "Compact Waveguide Load with Thin Film Resistor," Proceedings of 2015 Photonics & Electromagnetics Research Symposium, Prague, July 6 - 9，Page(s)1402-1405

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