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A 300 GHz waveguide filter, designed to block the unwanted upper sideband from reaching a heterodyne mixer, is presented. This WR-3 filter is based on three cross-coupled TE101 resonators. It is designed to have a Chebyshev response, and cross-coupling between first and third resonators provides transmission zeros in the stopband. The filter is fabricated using a multilayered SU-8 micromachining process...
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