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运用混合降耦方法,提出了一种简单但高效率的减小背腔式缝隙天线耦合的结构,通过放置两对称寄生单元和去介质的降耦方法,经点频优化,与无附加结构的天线相比,在反射系数小于-10d B的1.7%带宽范围内(中心频率为12GHz)互耦降低了9.7d B,天线的方向图得到了改善,端射方向的能量减小。在点频优化的基础上,通过带宽内的优化进一步改善了耦合性能,在反射系数小于-10d B的2.2%带宽范围内互耦降低了11.5d B。该降耦方法结构简单、成本低、易加工。
A hybrid hybrid decoupling method is proposed to reduce the coupling of back cavity slot antenna with a simple but efficient method. By placing two symmetrical parasitic elements and decoupling method of decoupling, the optimal frequency is optimized with no additional structure Compared to the antenna, the mutual coupling decreases by 9.7d B within 1.7% of the bandwidth with the reflection coefficient less than -10d B (the center frequency is 12GHz). The antenna pattern is improved and the energy in the endfire direction is reduced. Coupling performance is further improved by optimization within the bandwidth based on point-frequency optimization, with a 11.5 dB reduction in mutual coupling across the 2.2% bandwidth with a reflection coefficient of less than -10 dB. The decoupling method has the advantages of simple structure, low cost and easy processing.