應用射頻開關之可電子控制波束方向天線

Electronically Controlled Beam Switching Antennas using RF Switches

胡維龍(Wei-Long Hu)

指導教授 ： 周錫增

共同指導教授 ： 廖文照

元智大學/電機通訊學院/通訊工程學系/碩士(2007年)

https://doi.org/10.6838/YZU.2007.00051

摘要

本論文中我們提出ㄧ種新穎的可電子控制的波束切換天線，此天線包含有一個圓柱型銅片，其上結合多個水平狹縫，中間是一根偶極天線，當作狹縫的訊號饋入源使用。利用不同位置上射頻開關導通與不導通的狀態設置，進而改變波束的方向。本研究所提出的天線構型，具有體積小、低成本的特性，對於無線通訊系統，適合作為小型的智慧型基地台天線使用。
本論文中另一個波束切換天線設計是一個中心饋入的平面式槽孔天線。二極體射頻開關是放置於天線槽孔上。可藉由電子方式控制射頻開關的導通與不導通，進而改變波束的方向。槽孔開口可以被調整往水平面的不同角度，產生一個指向性的波束，進而增加通訊連結的距離和加強訊噪比。此天線可以在不同的無線通訊規格中，應用於基地台和客戶端天線，這種平面槽孔式的天線結構，特別適用於汽車上。

關鍵字

射頻開關

並列摘要

A novel beam switching antenna design is proposed in this work. This antenna uses a dipole as the feed and a cylindrical metal enclosure with a stack of circular slits to allow wave propagation from the feed. An array of RF switches made of pin diodes are placed across the slits. The antenna beam can adjusted to the desired direction by changing on/off states of the switches. The beam switching feature of the proposed antenna makes it an attractive, low-cost alternative to wireless communication systems that need to implement smart antenna in their base stations.
A center-fed planar slot antenna configuration that provides a reconfigurable beam is also proposed. The direction of the antenna beam is controlled by RF switches mounted across the slot opening. By adjusting the connection configuration of the RF switch array, the slot opening can be directed toward different angles on the azimuth plane and hence provides a directional beam to extend the connection distance or enhance the signal-to-noise ratio. Such an antenna can be applied to both base station and client antennas for various wireless communications. The slot antenna structure and planar configuration make this antenna especially attractive as an automotive antenna.

並列關鍵字

RF Switches

參考文獻

dual-band dipole antenna on silicon using series MEMS switches,”

Antennas and Propagation Society International Symposium, 2003.

slot antennas,” IEEE Trans. Antennas Propaga., vol. 53, pp. 645-654,

Reconfigurable Operating Babd, Master Thesis, Yuan Ze University,

[4] R. V. Garver, “Microwave semiconductor switching techniques,” IRE