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A C/ka dual frequency dual Layer circularly polarized reflectarray antenna with microstrip ring elements

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4 Author(s)
Chulmin Han ; Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA ; Rodenbeck, C. ; Huang, J. ; Kai Chang

This paper reports a dual frequency dual layer circularly polarized reflectarray operating in the C and Ka bands. A 0.5-m right-hand circularly polarized planar reflectarray antenna is designed using microstrip ring elements of variable rotations to achieve a cophasal beam at broadside. The microstrip ring elements are more compact than the traditional reflectarray elements and can minimize blockage for the multilayer multifrequency applications. The highest efficiencies measured are 46% at 7.3 GHz and 38% at 31.75 GHz. The tested cross-polarization levels are -21 dB at 7.3 GHz and -29.2 dB at 31.75 GHz at the broadside direction. The tested results show that the designed ring element is suitable for both the single and dual layer applications with good bandwidth and circularly polarized performance.

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:52 ,  Issue: 11 )

Date of Publication:

Nov. 2004

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