A Tri-Band Frequency Selective Surface (FSS) to Diplex Widely Separated Bands for Millimeter Wave Remote Sensing

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• 作者：Jayaprakash Poojali ; Shaumik Ray…
• 关键词：Frequency selective surface ; Millimeter wave ; Remote sensing ; Tri ; band FSS
• 刊名：International Journal of Infrared and Millimeter Waves
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：37
• 期：10
• 页码：944-952
• 全文大小：995 KB
• 刊物类别：Physics and Astronomy
• 刊物主题：None Assigned
• 出版者：Springer New York
• ISSN：1866-6906
• 卷排序：37

文摘

A substrate-backed frequency selective surface (FSS) is presented for diplexing the widely separated frequency spectrum centered at 55, 89, and 183 GHz with varying bandwidth for spatial separation in the quasi-optical feed network of the millimeter wave sounder. A unit cell composed of a crossed dipole integrated with a circular ring and loaded inside a square ring is optimized for tri-band frequency response with transmission window at 89 GHz and rejection windows at 55 and 183 GHz. The reflection and transmission losses predicted for the optimized unit cell (728 μm × 728 μm) composed of dissimilar resonant shapes is less than 0.5 dB for transverse electric (TE) and transverse magnetic (TM) polarizations and wide angle of incidence (0°–45°). The FSS is fabricated on a 175-μm-thick quartz substrate using microfabrication techniques. The transmission characteristics measured with continuous wave (CW) terahertz transmit receive system are in good agreement with the numerical simulations.