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Proof of Concept of a Dual-Band Circularly-Polarized RF MEMS Beam-Switching Reflectarray
Date
2012-11-01
Author
Guclu, Caner
Perruisseau-Carrier, Julien
Aydın Çivi, Hatice Özlem
Metadata
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This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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In this communication we propose the concept of a circularly polarized reflectarray (RA) antenna capable of independent beam-switching in both K and Ka bands. The RA unit cell comprises one microstrip ring per each operation frequency. Each ring is integrated with six equally spaced series RF micro electro-mechanical systems (RF MEMS) switches, which allows implementing the sequential rotation principle formerly used in circularly-polarized RA for single-frequency operation. A detailed design is proposed, considering the best relative arrangement of the rings corresponding to each frequency, the accurate modeling of the RF MEMS switches, and the full-wave simulation of the full array. The designed RA is implemented on a 4-inch quartz wafer and comprises 109 K-band and 124 Ka-band split-rings. Two prototypes representing two frozen states of the reconfigurable antenna are fabricated and measured. The designed RA can +/- 120 degrees provide progressive phase difference in both operation bands exhibiting beam switching to +/- 35 degrees and +/- 24 degrees off the broad-side in K and Ka bands respectively. The performance of the designed antenna is verified by the agreement of the measured and simulated radiation patterns.
Subject Keywords
Circularly polarized
,
Dual band
,
Reconfigurable
,
Reflectarray
,
RF MEMS
,
Split-ring
URI
https://hdl.handle.net/11511/46002
Journal
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
DOI
https://doi.org/10.1109/tap.2012.2207690
Collections
Department of Electrical and Electronics Engineering, Article