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五、圆环微带天线微带天线在飞行器天线中的应用很广泛,文献报导甚多。微带线用于天线系统,其谐振频率仅与带长和介质的介电常数有关,增加微带的宽度或微带与接地面之间的距离,辐射效率也随之提高。电磁能量被限制在非常靠近微带的区域内,只要接地面的宽度比微带本身的宽度大3倍以上,就可以认为接地面的宽度为无限大。若微带和与它平行的其他导电面之间的距离足够大,就可以避免横向耦合的损失。因此,微带辐射器基本上不受周围环境条件的影响,安装在弹体上的性能与弹体形状尺寸无关。
Fifth, the circular microstrip antenna Microstrip antenna in the aircraft antenna is widely used in the literature reported a lot. The microstrip line is used in the antenna system. The resonant frequency of the microstrip line is only related to the length of the dielectric and the dielectric constant of the medium, which increases the width of the microstrip or the distance between the microstrip and the ground plane and improves the radiation efficiency. Electromagnetic energy is limited to very close to the microstrip area, as long as the width of the ground plane is greater than three times the width of the microstrip itself, it can be considered that the width of the ground plane is infinite. If the distance between the microstrip and other conductive surfaces parallel to it is large enough, the loss of lateral coupling can be avoided. Therefore, the microstrip radiator is basically unaffected by the ambient conditions, and the performance on the projectile is independent of the projectile’s shape and size.