Reconfigurable antenna system with a movable ground plane for cognitive radio

Author

Costantine, Joseph ; Tawk, Youssef ; Woodland, Jonathan ; Flaum, Noah ; Christodoulou, Christos G.

Author_Institution

Electr. & Comput. Eng. Dept., American Univ. of Beirut, Beirut, Lebanon

Volume

8

Issue

11

fYear

2014

fDate

August 19 2014

Firstpage

858

Lastpage

863

Abstract

A new cognitive radio antenna system is presented and discussed in this study. The antenna system is composed of a wideband antenna that is used for channel sensing and a communicating antenna that is used for dynamic transmission over various frequencies. The communicating antenna is a software controlled reconfigurable antenna that can tune its frequency response by changing the height and angular position of its ground plane. This antenna is composed of a rectangular patch and three ground planes. Two ground planes are fixed while the third one moves and tilts based on the user´s demand. The antenna´s moving ground plane is controlled by an Arduino board and two linear actuators. The wideband sensing antenna is composed of a printed monopole patch that searches the spectrum for idle frequencies. A prototype of the complete antenna system is fabricated and tested. Both experimental and simulated results show good agreement.

Keywords

broadband antennas; cognitive radio; frequency response; microstrip antennas; monopole antennas; Arduino board; angular position; channel sensing; cognitive radio; communicating antenna; dynamic transmission; frequency response; height position; idle frequencies; linear actuators; movable ground plane; printed monopole patch antenna; rectangular patch; software controlled reconflgurable antenna; user demand; wideband sensing antenna;

fLanguage

English

Journal_Title

Microwaves, Antennas & Propagation, IET

Publisher

iet

ISSN

1751-8725

Type

jour

DOI

10.1049/iet-map.2013.0605

Filename

6882315