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