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Dual-channel filter based on dielectric resonator for 5G massive MIMO system

机译:基于5G大型MIMO系统的介质谐振器的双通道滤波器

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In this paper, we present a method for designing dual-channel bandpass filters (BPFs) using dielectric resonator (DR). Two BPFs are integrated as one dual-channel filter with two input ports and two output ports. By using a common quad-mode DR shared by two second-order BPFs, only one metallic cavity is needed, which greatly reduces the circuit size. By properly arranging the input and output feeding probes, two of the resonant modes are excited for one channel and other two for the other channel. Since the feeding probes of one channel filter do not excite the resonant modes of the other one, isolation between two filters is achieved. Three transmission zeros are generated near the passband, resulting in high selectivity and good out-of-band rejection. For verification, the dual-channel filter is implemented, which features good bandpass responses and offers a significant size reduction in comparison with conventional two DR filters.
机译:在本文中,我们介绍了一种使用介质谐振器(DR)设计双通道带通滤波器(BPF)的方法。将两个BPF集成为一个具有两个输入端口和两个输出端口的双通道过滤器。通过使用由两个二阶BPF共享的共同共享的共同模式DR,仅需要一个金属腔,这大大降低了电路尺寸。通过适当地布置输入和输出馈电探针,对于另一个通道,将两个谐振模式激发了两个谐振模式。由于一个通道滤波器的馈电探针不激发另一个频官的谐振模式,因此实现了两个滤波器之间的隔离。在通带附近产生三个传动零,从而产生高选择性和良好的带外抑制。为了验证,实现了双通道滤波器,其具有良好的带通响应,并且与传统的两个DR滤波器相比,提供了显着的尺寸减小。

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