Compact frequency reconfigurable slot antenna with continuous tuning range for cognitive radios

Author

Cheung, S.W. ; Cao, Y.F. ; Yuk, T.I.

Author_Institution

Dept. of Electr. & Electron. Eng., Univ. of Hong Kong, Hong Kong, China

fYear

2015

fDate

13-17 April 2015

Firstpage

1

Lastpage

4

Abstract

The design of a compact frequency-reconfigurable slot antenna for cognitive radios is proposed in this paper. The antenna consists of a rectangular-ring slot, a T-shaped feed line, an inverted T-shaped stub and two varactors. The length of the rectangular-ring slot is designed to resonate at about 2.4 GHz. The inverted T-shaped stub is used to extend the current path, making the total size of the antenna smaller for low frequency operation. The two varactors are used to achieve continuous tuning. The proposed antenna is studied and designed using computer simulation. The simulated return loss, radiation pattern, realized peak gain and efficiency of the antenna are presented. Results show that the antenna has a wide tuning range from 2.14 to 3.33 GHz (43.51%) and is a potential candidate for use in cognitive radios.

Keywords

UHF antennas; antenna feeds; antenna radiation patterns; cognitive radio; slot antennas; software radio; tuning; varactors; T-shaped feed line; cognitive radio; compact frequency reconfigurable slot antenna design; continuous tuning range; frequency 2.14 GHz to 3.33 GHz; inverted T-shaped stub; low frequency operation; radiation pattern; rectangular ring slot; simulated return loss; varactor; Cognitive radio; Feeds; Resonant frequency; Slot antennas; Tuning; Varactors; biasing circuit; cognitive radio; continuous tuning; frequency reconfigurable; slot antenna;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation (EuCAP), 2015 9th European Conference on

Conference_Location

Lisbon

Type

conf

Filename

7228286