5G毫米波双频段基片集成波导双工器

Dual-Band SIW Duplexers for 5G Millimeter-Wave Systems

提出一种适用于5G毫米波无线通信系统的具有高隔离度和优异通带性能的双频段基片集成波导(SIW)双工器。该双工器由一种新型的Y型耦合谐振器和频带独立可控的新型双频段滤波器组成。新型双频段滤波器基于SIW三角形谐振腔,相比传统矩形SIW谐振腔空载Q值更高,并且设置多种扰动元件以实现两个频带的独立可控。Y型耦合谐振器由圆弧状的微带线拼接而成,最大限度地减弱通道互耦合以提高隔离度。该双频段双工器具有结构紧凑、尺寸小的优点。实际制作的双频段双工器接收通道中心频率分别为27 GHz和36 GHz,发射通道中心频率分别为29 GHz和39 GHz。实测结果其阻带抑制优于-60 dB,隔离度优于-50 dB,验证了该设计方法的有效性。

A dual-band substrate integrated waveguide(SIW) duplexer with high isolation and excellent passband performance suitable for 5 G millimeter wave wireless communication systems is proposed in this paper. The duplexer consists of a new Y-type coupled resonator and a new dual-band filter with independently controllable frequency bands. The dual-band filter is based on the SIW triangular resonator, which has higher Q value without load than that of the traditional rectangular SIW resonator. It is equipped with a variety of perturbation elements to achieve independent controllability for the two frequency bands. The Y-type coupled resonator proposed in this paper is formed by splicing arc-type microstrip lines to minimize the mutual coupling between channels to improve the isolation. The dual-frequency duplexer has advantages of compact structure and small size. The center frequencies of the receiving channel are 27 and 36 GHz respectively, and the center frequencies of the transmitting channel are 29 and 39 GHz. We designed and manufactured the dual-band duplexer. The actual measurement results show that all of the stopband rejections are better than-60 dB, and all of the isolation are better than-50 dB, which verifies the effectiveness of this design method.