To increase the radiation efficiency and broaden the operation bandwidth, an aperture-coupled microstrip antennaof high temperature superconductor with multi-layer substrates is designed.
为提高辐射效率和扩展工作带宽，对一种口径耦合馈电的多层介质高温超导微带天线进行了设计。
2
The narrow bandwidth property of a microstrip antenna is one of the important reasons to restrict its wide application.
微带天线的窄频特性是限制它广泛应用的原因之一。
3
Helical antenna has not only almost identical to the resistive input impedance in broad bandwidth, but also works by the end of super-gain front lobed map in the same frequency band.