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X-Band Reflectarray Antenna With Switching-Beam Using PIN Diodes and Gathered Elements

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3 Author(s)
Carrasco, E. ; Electromagn. & Circuit Theor. Dept., Univ. Politec. de Madrid, Madrid, Spain ; Barba, M. ; Encinar, J.A.

An electronically switching-beam reflectarray antenna to be used in X-band has been designed, manufactured and tested, using PIN diodes as switching device. The antenna has 244 elements arranged in a circular aperture. With the aim of saving electronic devices and reducing both manufacturing complexity and cost, the phase control has been implemented at sub-array level, using aperture-coupled patches gathered by pairs to a common delay line. The antenna was designed to switch the beam between ±5°, in a scanning plane tilted 18.3° with respect to the YZ plane. Each state was obtained by forward biasing one half of the diodes, while the other half remains in reverse biasing. A third state with the beam pointing to 0° was obtained when all the diodes are in reverse biasing. The concept has been demonstrated by manufacturing and testing a breadboard. The measured radiation patterns fulfill the design requirements.

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:60 ,  Issue: 12 )

Date of Publication:

Dec. 2012

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