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Conference Paper
Compact Waveguided Load with Thin Film Resistor
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- Authors
- Manseok Uhm, Hongyeal Lee, Changsoo Kwak, Sohyeun Yun, Inbok Yom
- Issue Date
- 2015-07
- Citation
- Progress in Electromagnetics Research Symposium (PIERS) 2015 in Prague, pp.1402-1405
- Publisher
- IEEE
- Language
- English
- Type
- Conference Paper
- 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.
- KSP Keywords
- 3.5 mm, Alumina substrate, End wall, Ka-Band, Rectangular Waveguide, Return Loss, Tantalum nitride(TaN), Temperature Coefficient, Wide Frequency Range, impedance matching, sheet resistance