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为了实现倍频器多谐波输出,满足系统多频率需求,同时减少成本,增加系统集成度,引入了改进紧凑型悬置微带谐振单元(Compact Suspended Microstrip Resonators(CSMRs))滤波器,主要研究并实现了170 GHz和340 GHz双频段分别输出。仿真中分别设计170 GHz和340 GHz探针,引入CSMRs低通滤波器增加170 GHz对高频段的隔离,减小波导高度,提高WR.2.8波导截止频率,增加对300 GHz以下频段抑制,为了测试其输出特性和网络损耗,设计170~340 GHz背靠背模块。仿真结果为低通CSMRs滤波器满足在20~180 GHz通带内反射系数小于-18 d B,在266~520 GHz阻带内抑制度大于20 d B,背靠背结构仿真170 GHz与340 GHz频段反射系数均小于-15 d B,端口隔离大于30 d B,表现出良好的选频特性。测试结果表明:在170 GHz端口通带为150~185 GHz,反射系数小于-10 d B,损耗大于1.2 d B;在340 GHz端口,通带为306~355 GHz,反射系数小于-10 d B,损耗2 d B,两端口隔离度大于10 d B,最好60 d B。
In order to achieve multiple harmonic output of the frequency multiplier, meet the multi-frequency requirements of the system, reduce the cost and increase the system integration degree at the same time, an improved Compact Suspended Microstrip Resonators (CSMRs) filter is introduced. The main research And achieved the 170 GHz and 340 GHz dual band output. In the simulation, 170 GHz and 340 GHz probes were designed respectively. CSMRs low-pass filter was introduced to increase the isolation of 170 GHz from the high frequency band, reduce the waveguide height, increase the cut-off frequency of WR.2.8 waveguide and increase the suppression to the band below 300 GHz. Its output characteristics and network loss, design 170 ~ 340 GHz back-to-back module. The simulation results show that the low-pass CSMRs filter satisfies the reflection coefficient of less than -18 dB in the passband of 20-180 GHz and the suppression of more than 20 dB in the stopband of 266-520 GHz. The back-to-back structure simulates the reflections at 170 GHz and 340 GHz The coefficients are all less than -15 d B and the port isolation is greater than 30 d B, showing good frequency selectivity. The test results show that the passband of the 170 GHz port is 150-185 GHz, the reflection coefficient is less than -10 d B, and the loss is greater than 1.2 d B; in the 340 GHz port, the passband is 306-355 GHz and the reflection coefficient is less than -10 d B , Loss 2 d B, two port isolation greater than 10 d B, preferably 60 d B.