適用於數位電視之印刷式平面天線設計

Design of Printed Plane Antenna for DVB-T

徐嘉宏(Chia-Hung Hsu)

指導教授 ： 林信標

國立臺北科技大學/電資學院/電子電腦與通訊產業研發碩士專班/碩士(2007年)

https://doi.org/10.6841/NTUT.2007.00228

摘要

本論文提出一適用於數位電視(Digital Video Broadcasting, DVB)系統的印刷式平面天線設計，以符合台灣數位電視地面廣播(Digital Video Broadcasting - Terrestrial, DVB-T)所應用的頻段(533 MHz ~ 599 MHz)。利用FR4的印刷電路板(Printed Circuit Board, PCB)來製作，設計上的特色為成本低、體積小、製作簡單，並利用耦合及繞線曲折的觀念來得到較大的頻寬，使得操作頻段能涵蓋數位電視UHF(Ultrahigh Frequency)頻段(470 MHz ~ 870 MHz)的全頻段。

由研究結果中得知，使用繞線曲折式的設計，可在整體尺寸受局限時能達到所需要的1/4λ路徑長度，藉此方法來減少天線面積，並利用單極天線(Monopole Antenna)、繞線曲折式天線(Meander-line Antenna)及印刷式天線(Print Antenna)等天線為基礎，藉此設計出本論文所提出的倒H型曲折式天線。此倒H型曲折式天線，其面積尺寸大小為34mm × 124mm，天線場型分別在470 MHz、570MHz及870MHz的XZ平面都具有全方向性(Omni-directional)的特性，經實際測試頻道接收度，台灣目前可接收的頻道均可平穩收看(15個數位電視頻道以及1個數位廣播頻道)。

關鍵字

單極天線 ； UHF頻段數位電視地面廣播 ； 繞線曲折式天線

並列摘要

In this thesis, the design of printed plane antenna for Taiwan DVB-T system applications are proposed. The propose antenna use coupling and meander-line to enhance bandwidth to cover full band of UHF (470 MHz ~ 870 MHz). Further, the advantage of this antenna is low cost, small size and easy to implement using FR4 PCB board.

As the result shows, using the design of meander-line that can reduce the area of the antenna. The invert H meander-line antenna proposed in this paper is based on such antenna as monopole antenna, meander-line antenna and print antenna. The area of the invert H meander-line antenna is 34mm × 124mm. The radiation pattern of the invert H meander-line antenna in the XY plane of 470 MHz, 570MHz and 870MHz separately are omni-directional, and can receive all the channels of Taiwan DVB-T system.

並列關鍵字

Monopole Antenna ； UHF Band ； DVB-T ； Meander-line Antenna

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