Title :
A spatial image rejection filter based on miniaturized-element FSS for J-band radar applications
Author :
Moallem, M. ; Sarabandi, K.
Author_Institution :
EECS Dept., Univ. of Michigan, Ann Arbor, MI, USA
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.
Keywords :
equivalent circuits; frequency response; frequency selective surfaces; microfabrication; millimetre wave filters; millimetre wave frequency convertors; millimetre wave mixers; millimetre wave radar; polymers; spatial filters; J-band radar applications; J-band upconvertor mixer; USB response; adjacent transmission zero; equivalent circuit model; frequency 206 GHz to 208 GHz; frequency 221 GHz to 223 GHz; frequency response; full-wave simulation; image response supression; insertion loss; loss 0.6 dB; low-loss polymer membrane; lower sideband suppression; membrane-supported MEFSS; membrane-supported frequency selective surface; miniaturized-element FSS; miniaturized-element frequency selective surface; miniaturized-element patch-wire MEFSS configuration; single-face frequency selective surface; size 10 mum; spatial image rejection filter; substrate losses; upper-side band response; wafer microfabrication technology; Equivalent circuits; Filtering theory; Frequency response; Frequency selective surfaces; Integrated circuit modeling; Resonant frequency;
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2012 IEEE
Conference_Location :
Chicago, IL
Print_ISBN :
978-1-4673-0461-0
DOI :
10.1109/APS.2012.6348720
