W波段32路宽带高效率功率合成器设计与实现

Design and realization of a W-band 32-way broadband high- efficiency power combiner

摘要:

设计了一款W波段32路全波导带宽、高效率功率合成器。该器件采用E?H面T型结混合的实现方法，提高了功率合成器的紧凑性。为了扩展多路合成带宽，引入脊波导传输线，并采用多节阻抗匹配阶梯、渐变式过渡等形式。该结构具有结构紧凑、全波导带宽匹配、高效率的特点。为了验证该方法，加工并测试了32路功率合成器背靠背结构。在W波段范围内，该结构回波损耗优于15 dB，插入损耗低于1.05 dB，相对带宽为37.8%，合成效率大于78.4%。实测结果证明了该设计方法的有效性，对于多路功率合成场景具有很好的应用价值。

Abstract:

A 32-way wideband and high-efficiency power combiner operating at the W-band is designed. The component employs a hybrid E-H plane T-junction to enhance the compactness of the power combiner. To extend the combining bandwidth, ridge waveguide transmission lines are introduced, along with multi-section impedance matching steps and gradual transitions. This structure features compactness, wideband matching, and high efficiency. To validate the proposed method, a 32-way back-to-back power combiner was fabricated and tested. Experimental results show that the structure achieves a return loss better than 15 dB, an insertion loss below 1.05 dB, a relative bandwidth of 37.8%, and a combining efficiency exceeding 78.4% across the W-band. These results confirm the effectiveness of the proposed design method, demonstrating significant application potential for multi-channel power combining scenarios.