华东师范大学学报（自然科学版）Issue(2)：25-34,10.DOI:10.3969/j.issn.1000-5641.2026.02.003
一种高隔离度、宽带增益K波段收发阵列天线设计
Design of a K-band array antenna with high isolation and broadband gain
摘要
Abstract
Microstrip comb antennas typically adopt parallel microstrip arrangements and are well suited for large-scale array designs because of their fixed element spacing and compact size.However,the bandwidth of comb arrays is often constrained by the resonant characteristics of microstrip lines,and the linear arrangement of elements can easily result in high cross-polarization levels.Microstrip grid array antennas,through symmetric element configurations and coupling design,can achieve flatter gain and broader impedance bandwidth.Furthermore,optimization of the element layout and feed network effectively suppresses sidelobes,improves polarization purity,and reduces transmission loss.This paper proposes a K-band array antenna that integrates a series-fed receiving and a series-parallel-fed transmitting antenna,employing Rogers RO5880 substrate with a dielectric constant of εr=2.2.A Chebyshev amplitude distribution is employed to realize non-uniform excitation of the elements for sidelobe reduction.Measurement results demonstrate that within the 23.0～24.3 GHz band,the antenna achieves an overall gain of 23.4 dBi,with a 3 dB gain bandwidth covering 23.02～24.08 GHz.The inter-array isolation remains below-46 dB across the operating band.At a center frequency of 23.5 GHz,the E-plane and H-plane sidelobe levels are both below-15 dB,indicating suitability for dense applications such as automotive radar,short-range high-data-rate communications,and 5G base stations.关键词
K波段/微带栅格天线/增益平坦性/隔离度/低副瓣Key words
K-band/microstrip grid antenna/gain flatness/high isolation/sidelobe reduction分类
信息技术与安全科学引用本文复制引用
周洋,蒋哲奥,朱越,张润曦..一种高隔离度、宽带增益K波段收发阵列天线设计[J].华东师范大学学报（自然科学版）,2026,(2):25-34,10.基金项目
上海东方英才青年项目(15904-412214-24013) （15904-412214-24013）
