强激光与粒子束2026，Vol.38Issue(10)：26-32,7.DOI:10.11884/HPLPB202638.250447
一分四路高功率容量开口波导单元及其阵列设计
Design of a low-grating-lobe high power open waveguide antenna with a four-way power divider
摘要
Abstract
[Background]With the rapid development of high-power microwave systems,array antennas are increasingly required to possess high power handling capability,high radiation efficiency,and low-profile characteristics.Open waveguide array antennas are widely used due to their high power capacity and structural robustness.However,conventional large-aperture open waveguide elements usually require complex multi-stage power distribution networks,which increases system height and may introduce higher-order modes,leading to reduced aperture efficiency and elevated grating lobes in array configurations.[Purpose]This paper aims to propose a high power handling open waveguide antenna element with reduced structural complexity and suppressed grating lobes,and to construct a low-profile array with high aperture efficiency.The main objective is to design a one-to-four radiation open waveguide unit capable of simplifying the rear-end power distribution network while improving field uniformity and array radiation performance.[Methods]A one-to-four high power handling open waveguide antenna element was proposed by incorporating crossed metal bars at the radiation aperture to achieve in-phase quadruple energy radiation.A three-stage matching cascade was introduced between the input port and the aperture plane to improve impedance matching.An E-plane metal block was added at the final matching stage to suppress higher-order modes at the independent small apertures,thereby ensuring a purer TE10 mode distribution.Based on the designed unit,a 16×16 array configuration was constructed to evaluate its radiation and grating lobe performance.[Results]Simulation results show that the proposed open waveguide unit achieves a reflection coefficient lower than-17 dB within the frequency range of 9.2-9.8 GHz.At the center frequency of 9.5 GHz,the unit exhibits a gain of 12.9 dB and an aperture efficiency of 90.1%,with a profile height of 0.9 λ.The constructed 16×16 array demonstrates grating lobe levels below-22 dB,indicating effective suppression of unwanted radiation and stable array performance.[Conclusions]The proposed open waveguide antenna element and array design effectively reduce the complexity of the power distribution network while maintaining high aperture efficiency and low grating lobe levels.The structure exhibits advantages of low profile,high efficiency,and strong grating lobe suppression,making it a promising candidate for high-power microwave array antenna applications.关键词
高功率微波/开口波导/低栅瓣/十字栅条/金属抑制块Key words
high power microwave/open waveguide/low grating lobe/crossed metal bar/metal block分类
信息技术与安全科学引用本文复制引用
秦笙,李相强,王祚,张健穹,王庆峰..一分四路高功率容量开口波导单元及其阵列设计[J].强激光与粒子束,2026,38(10):26-32,7.基金项目
国家自然科学基金项目(62531021) （62531021）
