Journal
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
Volume 58, Issue 7, Pages 2457-2459Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2010.2048874
Keywords
Circular-polarization; frequency selective surfaces; polarization conversion; split ring resonator
Funding
- U.K. Engineering and Physical Science Research Council [EP/E01707X/1]
- Northern Ireland Department of Education
- Engineering and Physical Sciences Research Council [EP/D045835/1, EP/E01707X/1] Funding Source: researchfish
- EPSRC [EP/E01707X/1, EP/D045835/1] Funding Source: UKRI
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A single layer, frequency selective surface based, sub-millimeter wave transmission polarizer is presented that converts incident slant linear 45 degrees polarization into circular polarization upon transmission. The polarization convertor consists of a 30 mm diameter 10 mu m thick silicon reinforced metalized screen containing 2700 resonator cells and perforated with nested split ring slot apertures. The screen was designed and optimized using CST Microwave Studio and predictions were validated experimentally by transmission measurements over the 250-365 GHz frequency range. This frequency range is used for remote environmental monitoring and 325 GHz represents a molecular emission line for H2O. The results obtained show good agreement between measured and modeled predictions. The measured 3 dB axial ratio bandwidth was 11.75%, measured minimum Axial Ratio was 0.19 dB and the measured insertion loss of the single layer screen was 3.38 dB.
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