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首页> 外文会议>International Workshop on Microwave and Millimeter Wave Circuits and System Technology >Compact bandpass filter with improved stopband characteristics using S-L coupling
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Compact bandpass filter with improved stopband characteristics using S-L coupling

机译：紧凑带通滤波器，使用S-L耦合具有改进的阻带特性

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摘要

A compact bandpass filter (BPF) with improved stopband performance using mixed electric/magnetic (E/M) coupling and Source-Load (S-L) coupling is presented. Due to the cancelling effect of the mixed coupling, a transmission zero (TZs) is employed near the passband. The design is implemented to a circular structure to achieve compact size. For realizing wide stopband characteristic, an extra transmission zero is achieved in the upper stopband owing to the S-L coupling introduced between the input and output port. A new filter centered at 1.08GHz has been analyzed, simulated and fabricated to verify the validity of the proposed method. The measured results show that there are three finite transmission zeros near the passband, which are located at 0.78GHz with 53.8dB rejection, 1.86GHz with 67.6dB rejection, 3.01GHz with 53.6dB rejection, respectively. The out-of-band rejection better than 30 dB is up to 6GHz. And the circuit only occupies 13.5×11.5mm2.
机译：提出了一种具有改进的使用混合电/磁性/磁性（E / M）耦合和源负载（S-L）耦合的紧凑带通滤波器（BPF）。由于混合耦合的抵消效果，在通带附近采用传输零（TZ）。该设计实现为圆形结构以实现紧凑的尺寸。为了实现宽的停止区特性，由于输入和输出端口之间引入的S-L耦合，在上部阻带中实现额外的传输零。已经分析了以1.08GHz为中心的新滤波器，模拟和制造，以验证所提出的方法的有效性。测量结果表明，通带附近有三个有限透射零，其位于0.78GHz，排斥为53.8dB，1.86GHz，排斥为67.6dB，分别为3.01gHz，排斥为53.6dB。带外抑制优于30 dB的带外抑制量高达6GHz。电路仅占13.5×11.5mm 2 。

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