A Compact Dual-Band Van Atta Array Based on the Single-Port Single-Band/Dual-Band Antennas
Xiao-Fei Li, Yong‐Ling Ban, Qiang Sun, Yongxing Che, Jun Hu, Zaiping Nie
Abstract
A compact dual-band Van Atta array work at <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">C</i> / <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">X</i> bands is proposed in this letter. A single-port dual-band antenna (SPDBA) and single-port single-band antenna (SPSBA) are designed for the dual-band Van Atta array. The structure reused method is employed in the design of the SPDBA. The high-frequency antenna is reused as the excitation structure of the low frequency antenna. The SPDBAs and the SPSBAs are interlaced to form a dual-band antenna array, which can reduce the number of antennas and control the antenna spacings. The spacings of the antennas in <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">C</i> / <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">X</i> bands are 0.54 <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">λ</i> <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">L0</sub> and 0.51 <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">λ</i> <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">H0,</sub> respectively. The single-layer and single-port structure of the antennas effectively reduce the number of transmission lines and the size of the dual-band Van Atta array. The total size of the compact dual-band Van Atta array is 142 × 30 × 3.2 mm. The −4 dB beamwidths of the monostatic radar cross section at 5.8 and 10.6 GHz are 59° and 62°.