4.7 Article

Code-Dependent Beam Shaping and Polarization Control by Binary Transmitarray

期刊

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
卷 71, 期 6, 页码 4834-4842

出版社

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2023.3265460

关键词

Antenna radiation patterns; Antenna arrays; Polarization; Lighting; Patch antennas; Phased arrays; Binary codes; Beam shaping; binary transmitarray (BTA); code-dependent; polarization control; polarization switching; programmable transmitarray (TA)

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A code-dependent methodology is proposed to simultaneously realize beam shaping and polarization control using binary transmit arrays (BTA). By individually designing binary codes for different unit elements, the radiation pattern and polarization of the synthetic field can be defined. Simulations and measurements have verified that this methodology provides a completely code-dependent mechanism to design radiation patterns and polarizations of BTAs. The methodology has great potential in communication and radar applications.
A code-dependent methodology is proposed to realize beam shaping and polarization control simultaneously by using binary transmitarray (BTA). The BTA unit elements are divided into two types, which are linearly polarized in orthogonal directions. By individually designing binary code for each type of unit elements, the radiation pattern and polarization of the synthetic field can be simultaneously defined. To verify this mechanism, four BTAs are designed at Ka-band with the same structures but with different binary codes to produce broadside directional beams with horizontal, vertical, left-handed circular, and right-handed circular polarizations, respectively. Furthermore, another BTA is designed to produce two directional beams pointing at different directions with left-handed and right-handed circular polarizations, respectively. Both simulations and measurements have verified that the proposed methodology provides a completely code-dependent mechanism to arbitrarily and independently design radiation patterns and polarizations of the BTAs. This methodology can be readily used to design binary programmable transmit arrays by integrating p-i-n or varactor diodes to the unit elements, so that radiation patterns and polarizations of the transmit arrays can be dynamically configured by merely changing the aperture codes, hence showing great values and potentials in communication and radar applications.

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