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Design of an Electronically Beam Scanning Reflectarray Using Aperture-Coupled Elements

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2 Author(s)
Mathieu Riel ; Dept. of Electr. Eng., Ecole Polytech. de Montreal, Que. ; Jean-Jacques Laurin

The design of a C-band electronically beam scanning reflectarray is presented. The reconfigurable reflectarray element consists of a microstrip patch, printed on a flexible membrane substrate, aperture-coupled to a transmission line loaded with two varactor diodes. The designed element allows continuous tuning of the reflected signal's phase over a 360deg range with a maximum loss of 2.4 dB at 5.4 GHz. The measured results on a 30-element reflectarray breadboard show that by varying the bias voltages on each element the main beam can be steered to large angles, up to 40deg from broadside in the H-plane. A loss analysis of the proposed reflectarray is also presented

Published in:

IEEE Transactions on Antennas and Propagation  (Volume:55 ,  Issue: 5 )