X波段加载部分反射表面的宽带谐振腔天线

Wideband Resonant Cavity Antenna with Partially ReflectiveSurface for X-band

摘要:

针对传统谐振腔天线的带宽窄的问题,提出了一种新型的X波段加载紧凑型部分反射表面的宽带谐振腔天线。其部分反射表面为双面覆有周期阵列结构的介质基板,具有紧凑的结构,能够提供相对更高的增益性能,并且在较宽的频段内具有正反射系数相位梯度。馈源天线是一个宽带的孔径耦合贴片天线,由方形贴片天线、矩形开槽的接地平面以及Y 形馈电网络组成。仿真结果表明,该谐振腔天线能够在X 波段实现相对带宽22.3%、增益(12.78~14.00)dBi等指标。

Abstract:

Aiming at the narrowband problem of traditional resonant cavity antenna(RCA), a novel wideband resonant cavity antenna with compact partially reflective surface(PRS) for X-band is presented. PRS is a dielectric slab with double-deck periodic arraystructure, which can provide relatively higher gain performance with compact structure. Inaddition,the reflection coefficient phase gradient of PRS is positive in wider band, The feedantenna is a wideband aperture-coupled patch antenna, which is composed of square patchantenna, ground plane with rectangular slot and Y-shaped feed network, The simulationresults show that the relative bandwidth of RCA is 22. 3% and the gain is between 12. 78 dBiand 14.00 dBi in X-band.