Millimeter-Wave Transmission-Line Reflectionless Filters
Matthew A. Morgan, Matt Bauwens, Seng Loo, Miho Hunter, Tod A. Boyd, Robert M. Weikle

TL;DR
This paper presents the design and fabrication of millimeter-wave reflectionless filters operating at 100 GHz and 230 GHz, achieving high stopband absorption up to 500 GHz, with experimental results aligning well with theoretical predictions.
Contribution
First successful implementation of reflectionless filters at millimeter-wave frequencies using advanced thin-film fabrication on Alumina substrates.
Findings
Filters operate effectively at 100 GHz and 230 GHz
Stopband absorption achieved up to 500 GHz
Measurements agree with theoretical models
Abstract
We report on the development of transmission-line reflectionless filters operating with passbands at 100 GHz and 230 GHz, and stopband absorption up to 500 GHz, the highest operating frequencies yet recorded for such filters. The designs are based on a previously reported mathematical solution to the reflectionless condition, now successfully implemented for the first time, using an advanced thin-film fabrication process on Alumina substrates. Sub-millimeter wave wafer probe measurements show good agreement with theory.
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Taxonomy
TopicsMicrowave Engineering and Waveguides · Microwave and Dielectric Measurement Techniques · Optical Coatings and Gratings
