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Performance Assessment of a Reconfigurable circularly Polarized Reflectarray at K-Band

Farias, R. L. ; Peixeiro, C. ; Heckler, M. V. T.

Performance Assessment of a Reconfigurable circularly Polarized Reflectarray at K-Band, Proc European Conf. on Antennas & Propagation - EUCAP, Copenhagen, Denmark, Vol. , pp. - , March, 2020.

Digital Object Identifier: 10.23919/EuCAP48036.2020.9136000

 

Abstract
The performance assessment of a two-beam electronically switchable circularly polarized reflectarray antenna based on single-layer circular microstrip patches with phase delay line stubs is presented. Preliminary numerical analysis demonstrates the reflectarray capability to switch its main beam between 9.1° and 18.2° from the boresight in K-band (17.7-20.2 GHz). A very simple preliminary model is used for the envisaged PIN diode switches. For an array with 20x20 unit-cells, the achieved gain is above 27.2 dBic and the side-lobe level is below –18.2 dB at f 0 . Moreover, a remarkably low axial ratio of 1.1 dB is obtained for the whole frequency band of operation.