Multi-band reconfigurable antennas embedded with lumped-element passive components and varactors

Frequency reconfigurable dual-band antennas with varactor diodes have been demonstrated. An equivalent circuit that takes both coupling with free space and an antenna conductor embedded with lumped-elements into consideration is proposed for the design of reconfigurable antennas. By means of the equ...

Full description

Saved in:
Bibliographic Details
Main Authors: Onodera, Shoichi, Ishikawa, Ryo, Saitou, Akira, Honjo, Kazuhiko
Format: Conference Proceeding
Language:English
Subjects:
Antenna measurements
Antenna radiation patterns
Dipole antennas
Dual-band antenna
Equivalent circuit
Equivalent circuits
Loss measurement
Reconfigurable antennas
Resonant frequency
Varactors
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Frequency reconfigurable dual-band antennas with varactor diodes have been demonstrated. An equivalent circuit that takes both coupling with free space and an antenna conductor embedded with lumped-elements into consideration is proposed for the design of reconfigurable antennas. By means of the equivalent circuit, reconfigurable antennas that independently control dual-band resonant frequencies were designed and fabricated with a parallel circuit with an inductor and a varactor. The lower resonant frequency was successfully controlled between 1.60 and 1.91 GHz, and the upper resonant frequency was controlled between 3.32 and 3.71 GHz. Measured gains were more than -9.8 dBi in the lower band, and more than -7.3 dBi in the upper band, respectively. To improve the gain, a reconfigurable antenna with a series circuit of an inductor and a varactor was also fabricated for the lower band. Measured gains have been improved to more than -4 dBi in the lower band.
ISSN:2165-4727
2165-4743
DOI:10.1109/APMC.2013.6695216