Abstract
In this article, a single-face, membrane-supported, miniaturized-element frequency selective surface (MEFSS) for suppressing the image response of a J-band upconvertor mixer is presented. In this design, a new miniaturized-element patch-wire MEFSS configuration is proposed to select the upper-side band (USB) response of a wave radiated from an upconvertor. The proposed MEFSS produces a single pole and an adjacent transmission zero to suppress the lower sideband. It is shown that the frequency response of this MEFSS can be designed readily using an equivalent circuit model. MEFSS elements are supported and protected by a 10μm thick low-loss polymer membrane which allows flexible handling and minimizes substrate losses. The membrane-supported MEFSS is fabricated using wafer microfabrication technology. Experimental results show that transmission response has 0.6 dB insertion loss in the passband (221-223 GHz) and more than 25 dB rejection out-of-band (206-208 GHz) which is in good agreement with full-wave simulation and its circuit model prediction.
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