A novel Ka-band compact parallel-coupled microstrip bandpass filter with harmonic suppression performance has been designed, implemented and tested on GaAs MMIC.,This proposed filter consists of modified coupled-line units with T-shaped open-stubs.,The proposed filter with T-shaped open-stubs is valuable in performance with low loss at fundamental frequency, suppression at harmonic frequencies and small size. The simulation is based on full-wave electromagnetic analysis and the measurement is based on chip test. It shows an insertion loss below 1.2 dB, return loss better than 20 dB in the pass band and high than 28 dB suppression at harmonic frequencies.,This Ka-band MMIC filter with harmonic suppression is attractive for the millimeter-wave system.

中文翻译：

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一种新型的具有谐波抑制功能的Ka波段MMIC耦合滤波器

在 GaAs MMIC 上设计、实现并测试了一种具有谐波抑制性能的新型 Ka 波段紧凑型平行耦合微带带通滤波器。该滤波器由带有 T 形开路短截线的改进耦合线单元组成。,该滤波器T 形开路短截线在基频低损耗、谐波频率抑制和小尺寸方面的性能很有价值。仿真基于全波电磁分析，测量基于芯片测试。它表现出低于 1.2 dB 的插入损耗、在通带中优于 20 dB 的回波损耗以及在谐波频率下高于 28 dB 的抑制。这种具有谐波抑制功能的 Ka 波段 MMIC 滤波器对毫米波系统具有吸引力。