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提出一种用于移动通信电调天线的宽频移相器。该移相器通过介质滑动来改变相位,通过局部阻抗匹配保证介质滑动过程中各支路阻抗的小幅波动,实现稳定的功率分配。仿真和实测结果表明,该移相器在1.71GHz-2.69 GHz范围内,电压驻波比(VSWR)小于1.25,传输系数波动不超过±1dB,在最大相移位置,相位离散性在±7.5%以内。该移相器具有工作频带宽、通用性强、布局紧凑、体积小等优点。
A broadband phase shifter for mobile communication antenna is proposed. The phase shifter can change the phase through the sliding of the medium and ensure the slight fluctuation of the impedance of each branch during the sliding of the medium through the local impedance matching so as to realize the stable power distribution. The simulation and experimental results show that the phase shifter has a VSWR of less than 1.25 and a transmission coefficient of ± 1 dB within the range of 1.71 GHz to 2.69 GHz. At the maximum phase shift position, the phase dispersion is within ± 7.5% Within. The phase shifter with a wide frequency band, versatility, layout, compact, small size and so on.