雙頻與三頻天線應用於無線通訊之設計與分析

Design and Analysis of Dual-band Antenna and Triple-band Antenna for Wireless Communication Applications

林建宏(Chien-Hung Lin)

指導教授 ： 林丁丙 ； 吳俊德

國立臺北科技大學/機電學院/電腦與通訊研究所/碩士(2005年)

https://doi.org/10.6841/NTUT.2005.00033

摘要

本篇論文，將探討兩個天線主題，分別為雙頻天線應用於無線區域網路與三頻天線應用於無線通訊系統。在一開始先介紹一個四分之波長共振結構平面雙L天線 Planar Dual-L Antenna (PDLA)，利用此共振結構加以設計雙頻與三頻天線。在PDLA天線的結構中，在兩端分別給予饋入以及短路，並且天線中央為開路耦合結構如此使得於共振頻率電流同向，經由適當調整中央開路耦合結構便可取得阻抗匹配。
本論文的第一個天線主題為雙頻天線設計應用於無線區域網路802.11 a / b / g。其中又分成兩個結構來討論，第一個天線結構為利用PDLA結合彎折的微帶天線，使兩個共振結構能夠個別工作在設計頻段2.4GHz與5.2GHz。第二個天線結構為利用PDLA與平面倒F天線(PIFA)做結合，使之分別工作於所設計之頻段，再將其PDLA結構彎折使其面積縮小。第二個天線主題為三頻天線設計應用於無線通訊系統，在此討論主題中亦分成兩個結構來討論。首先利用第一個天線主題的第二個天線結構再加以延伸，使之能夠操作在GSM1800、Bluetooth與WLAN 802.11 a這三個頻段。第二個天線主題為利用結合兩個PDLA，使之能夠操作於GSM1800、CDMA1900與WLAN 802.11 b / g三個頻段。

關鍵字

雙頻天線 ； 三頻天線 ； 多頻天線

並列摘要

In this thesis, two topics about antenna will be discussed. These two topics are designs of dual-band antenna for wireless local area network application and triple-band antenna for wireless communication application. First of all, a resonant structure with quarter wavelength, Planar Dual-L Antenna (PDLA), used for designing dual-band and triple-band antenna is introduced. The elementary structure of the PDLA is that shorting and feeding positions are located respectively on both sides of the designed antenna. The gap in the middle of PDLA can provide in-phase current at the resonant frequency. Therefore, good impedance-matching can be obtained by adjusting the length of gap on PDLA.
The first antenna topic is the designs of dual-band antennas for wireless local area networks 802.11 a b g, and the first topic is divided into two parts to discuss. First dual-band is designed to resonate at WLAN bands, 2.4GHz and 5.2GHz. This antenna structure is combined by a PDLA and a bent microstrip antenna. The second antenna of the first topic takes advantage of combining a bent PDLA and a PIFA to resonate at 2.4GHz and 5.2GHz. The second topic is the designs of triple-band antennas for wireless communication systems, and this topic is also divided into two parts to discuss. The first antenna in the second topic can be operated at GSM1800, Bluetooth and WLAN 802.11 a bands. This antenna structure is the extension of the second antenna in the first topic. The second antenna in the second topic takes advantage of combining two PDLAs which can operate at GSM1800, CDMA1900 and WLAN 802.11 b g bands.

並列關鍵字

Dual-band Antennas ； Triple-band Antenna ； Multi-band Antenna

參考文獻

[3]S.-H. Yeh, K.-L. Wong, T.-W. Chiou, and S.-T. Fang,

substrate for wireless communication,” IEEE 2003

Transactions on Antennas and Propagation, Vol 1, pp 435-

438, June 2003.

[2]C. A. Balanis, Antenna theory: analysis and design,