适合临近空间通信的Ka/V双频口径耦合天线设计

Aperture Coupled Antenna Design Suitable for Near Space Communication in Ka/V Dual-Band

为了减缓飞行器在临近空间高速飞行时产生的等离子体鞘套"黑障"对其通信影响,根据ITU分配的临近空间3区业务频段,设计了一种在Ka/V双频段工作的口径耦合微带天线。该天线在中间缝隙开一圆孔,通过改变圆孔大小实现双频工作,并组成1×4的天线阵列,实现了在Ka和V两个频段的通信。设计结果表明:在Ka频段的-10 d B带宽达到11.33%,V频段带宽达到2.52%,满足其在临近空间3区业务的通信频段。该天线易于实现,结构简单,可为临近空间通信飞行器天线设计提供参考。

In order to alleviate the plasma sheath set ＇ blackout＇ impact on the communication when the vehicle flying in the near space at high speed. According to the ITU distributed business of third frequency of near space, an aperture coupled microstrip antenna is designed for working in Ka/V dual-band. A round hole is opened in the middle gap of the antenna aperture, by changing the hole size to work in Ka/V dual-band. Then a 1- 4 array antenna is composed to work at Ka and V two communication frequency bands. This design shows that the -10 dB bandwidth can be reached 11.33% in Ka band and 2.52% in V band respectively, thus satisfying their business in third area of near space communication frequency. This antenna has many advantages, such as an oversimplified structure and easy fabrication. The antenna provides an example for design of vehicle antenna for near space communication.