A Circular Patch Fed by a Switch Line Balun With Printed L-Probes for Broadband CP Performance

A broadband circularly polarized (CP) patch antenna fed by a planar balun with a pair of printed probes is presented in this letter. Using switch line structure to design the balun, combined with two printed L-probes to supply dual feed with 90deg phase difference to the circular patch, the antenna...

Full description

Saved in:
Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2007, Vol.6, p.608-611
Main Authors: Ze-Hai Wu, Yu Lou, Yung, E.K.-N.
Format: Article
Language:English
Subjects:
Antennas
Baluns
Bandwidth
Broadband
Broadband antennas
Circularly polarized (CP) antenna
Feeds
Gain
Impedance matching
Microstrip antennas
Noise levels
Optical polarization
Patch antennas
printed L-probe
Probes
Radar antennas
Switches
wideband patch antenna
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A broadband circularly polarized (CP) patch antenna fed by a planar balun with a pair of printed probes is presented in this letter. Using switch line structure to design the balun, combined with two printed L-probes to supply dual feed with 90deg phase difference to the circular patch, the antenna achieves good performance in terms of large impedance and axial ratio (AR) band-widths. The measured results agree well with the simulations, indicating that the antenna possesses an impedance (S 11 < -10 dB) bandwidth of 45%, and axial ratio (AR < 3 dB) bandwidth of 41%. In addition, the 3-dB gain bandwidth and the peak gain are 44%, and 6 dBi, respectively.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2007.913330