4.7 Article

Electronically Reconfigurable FSS-Inspired Transmitarray for 2-D Beamsteering

期刊

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
卷 65, 期 9, 页码 4880-4885

出版社

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

关键词

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

资金

  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

向作者/读者索取更多资源

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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