4.7 Article

Electronically Reconfigurable FSS-Inspired Transmitarray for 2-D Beamsteering

Journal

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
Volume 65, Issue 9, Pages 4880-4885

Publisher

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2017.2723087

Keywords

Antenna arrays; antennas; beam steering; frequency selective surfaces (FSS); transmitarray (TA)

Funding

  1. University of South Wales, U.K.
  2. Portuguese Government [SAICT-45-2015-03/16432, POCI-01/-0145-FEDER-016432]
  3. FEDER within COMPETE
  4. Instituto de Telecomunicacoes [PEst-OE/EEI/LA0008/2016]
  5. Engineering and Physical Sciences Research Council [EP/I029613/1] Funding Source: researchfish
  6. EPSRC [EP/I029613/1] Funding Source: UKRI

Ask authors/readers for more resources

A novel electronically reconfigurable transmitarray (TA) with 2-D beamsteering capability is presented in this communication. The proposed structure, inspired on frequency selective surfaces loaded with varactor diodes, allows the phase range of each TA element to be individually controlled enabling an automated steering of the main lobe of an original antenna pattern, in both elevation and azimuth planes (2-D beamsteering). This has been demonstrated on a 5 x 5 unit-cell stacked structure with active feeding, coupled to the aperture of a standard gain horn antenna. A complete electromagnetic study using CST Microwave Studio is presented to evaluate and characterize the TA elements and the effect the proposed feeding network has on the structure's behavior. Following initial simulations, a prototype of the active TA has been characterized. Automated antenna beamsteering with ranges up to Az = 28 degrees and El = 26 degrees and 1 degrees of angular resolution, is achieved by means of electromagnetic simulations and validated against experimental results at 5.2 GHz.

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