A frequency tuning method for a planar inverted-F antenna

被引：42

作者：

Komulainen, Mikko ^{[1
,2
]}

Berg, Markus ^{[3
]}

Jantunen, Heli ^{[1
,2
]}

Salonen, Erkki T. ^{[3
]}

Free, Charles ^{[4
]}

机构：

[1] Univ Oulu, Res Grp Infotech Oulu, Microelect & Mat Phys Labs, FIN-90014 Oulu, Finland

[2] Univ Oulu, Res Grp Infotech Oulu, EMPART, FIN-90014 Oulu, Finland

[3] Univ Oulu, Telecommun Lab, FIN-90014 Oulu, Finland

[4] Univ Surrey, Adv Technol Inst, Guildford GU2 7XH, Surrey, England

来源：

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2008年 / 56卷 / 04期

关键词：

frequency tuning; mobile antennas; planar inverted-F antenna (PIFA); RF switches;

D O I：

10.1109/TAP.2008.919200

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A novel method is presented for electrically tuning the frequency of a planar inverted-F antenna (PIFA). A tuning circuit, comprising an RF switch and discrete passive components, has been completely integrated into the antenna element, which is thus free of dc wires. The proposed tuning method has been demonstrated with a dual-band PIFA capable of operating in four frequency bands. The antenna covers the GSM850, GSM900, GSM1800, PCS1900 and UNITS frequency ranges with over 40% total efficiency. The impact of the tuning circuit on the antenna's efficiency and radiation pattern have been experimentally studied through comparison with the performance of a reference antenna not incorporating the tuning circuit. The proposed frequency tuning concept can be extended to more complex PIFA structures as well as other types of antennas to give enhanced electrical performance.

引用

页码：944 / 950

页数：7

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