An Active Integrated Leaky-Mode Antenna Array for Radio Frequency Identification

Author

Tzuang, Ching-Kuang C. ; Chen, Chao-Tsu ; Wang, To-Po ; Hu, Cheng-Nan ; Hsu, Tso-Cheng ; Lin, Fung-Yaw ; Chao, Antony C.C. ; Cho, Hsun-Jung

Author_Institution

Institute of Electrical Communication Engineering, National Chiao Tung University, 1001 Ta Hsueh Road, Hsinchu, Taiwan. Tel: +886 3 573 1847, Fax: +886 3 571 9247, e-mail: cktzuang@cc.nctu.edu.tw

Volume

3

fYear

1999

fDate

Oct. 1999

Firstpage

130

Lastpage

133

Abstract

A battery-free identification transponder is presented. It incorporates a dual-beam angle-diversity leaky-mode antenna array, connected to two power divider/combiner networks. The integrated antenna shows 20.4 dBi directivity and 16.3 dB gain by measurement The first-trial designs also include an RF-to-DC converter of 20% efficiency and an oscillator of 18% DC-to-RF efficiency. By placing two horn antennas in the base station, one at 1 meter away for sending the interrogating CW signals and another at 2.5 meters away for receiving the coded, modulated signals from the transponder, we obtain the demodulated signals matched identically to the coding signals at the transponder for data rates up to 15K bps.

Keywords

Antenna arrays; Antenna measurements; Base stations; Gain measurement; Horn antennas; Oscillators; Power dividers; Radiofrequency identification; Receiving antennas; Transponders;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 1999. 29th European

Conference_Location

Munich, Germany

Type

conf

DOI

10.1109/EUMA.1999.338545

Filename

4139568