近几年来,由于单边带无线电通信中相移法和第三种方法的迅速发展,需要设计一种宽频带相移网络,使信号经过该网络后,所引起的相移之差近似地等于90°,所引起的相位不对称小于1°,以满足边带抑制比40分贝的要求.因而对宽频带相移网络提出了极为严 In recent years, due to the rapid development of the phase shift method and the third method in single sideband radio communication, it is necessary to design a wideband phase shift network so that the difference in phase shift caused when a signal passes through the network is approximately equal to 90 °, the phase asymmetry caused by less than 1 °, in order to meet the sideband rejection ratio of 40 dB requirements.Therefore, proposed for the broadband phase shift network is extremely strict