Bi-directionally fed phased-array antenna downsized with variable impedance phase shifter for ISM band
Bi-directionally fed phased-array antenna downsized with variable impedance phase shifter for ISM band
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ISM 频段具有可变阻抗移相器的小型双向馈电相控阵天线
DOI：
10.1109/tmtt.2006.877420
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发表时间：
2006
影响因子：
4.3
通讯作者：
Masatoshi Tsuji
中科院分区：
文献类型：
--
作者：
Masatoshi Tsuji
提出了一种新型双向馈电相控阵天线。在相同的性能下，BiPA的相移是传统天线的一半，因此体积更小，成本更低。BiPA的主要部件是天线元件和可变阻抗移相器（vips）。VIPS由三个谐振电路组成，其中包括可变电容，由于输入/输出阻抗和相移可以独立变化，因此它既可以用作功率分配器，也可以用作阻抗匹配器件。在2.45 ghz工业-科学-医疗频段对带有VIPS的BiPA进行了仿真和评估。实测结果与模拟结果吻合较好。在控制电压为0 ~ 3.5 v DC时，当相移为0/spl sim/80/spl°/时，双声压放大器的插入损耗为1.4 dB，回波损耗为- 17db。双声压放大器的测量辐射方向图为/spl plusmn/30/spl°/，波束宽度为24/spl°/，旁瓣为- 9db。此外，可以通过改变每个天线元件的功率比来增强副瓣抑制。
A novel bi-directionally fed phased-array antenna (BiPA) is presented. A BiPA can operate at half the phase shift of the conventional antenna with the same performance, leading to smaller size and lower cost. Main components of a BiPA are antenna elements and variable impedance phase shifters (VIPSs). The VIPS consists of three resonant circuits that include variable capacitors, it is applicable for both functions as a power divider and as an impedance-matching device, since the input/output impedance and the phase shift can be independently varied. The BiPA with a VIPS is simulated and evaluated at a 2.45-GHz industrial-scientific-medical band. The measured results agree well with the simulated ones. The performances of the VIPSs are confirmed as 1.4 dB in insertion loss, and -17dB in return loss for a phase shift of 0/spl sim/80/spl deg/ with the control voltage from 0- to 3.5-V DC, and the measured radiation pattern of the BiPA is /spl plusmn/30/spl deg/ in the steering angle, 24/spl deg/ in beamwidth, and -9dB in the sidelobe. Furthermore, an enhancement of the sidelobe suppression can be expected by changing the power ratio of each antenna element.