Experimental investigation on rectangular plate antenna with Ω-shaped slot
Article first published online: 7 DEC 2012
Copyright 2001 by the American Geophysical Union.
Volume 36, Issue 5, pages 833–839, September-October 2001
How to Cite
2001), Experimental investigation on rectangular plate antenna with Ω-shaped slot, Radio Sci., 36(5), 833–839, doi:10.1029/2000RS002320.(
- Issue published online: 7 DEC 2012
- Article first published online: 7 DEC 2012
- Manuscript Accepted: 18 APR 2001
- Manuscript Received: 12 JAN 2000
In this paper, a single-layer single-element plate antenna with an Ω-shaped slot is presented for broadening impedance bandwidth and suppressing cross-polarization levels. The plate is basically suspended above a ground plane and fed by a coaxial probe. A thin Ω-shaped slot is cut at the middle of the plate. The investigations on impedance and radiation characteristics are experimentally conducted. The measured results show that the achieved impedance bandwidths for VSWR = 2:1 reach up to the order of 20% and the improved radiation patterns are stable across the bandwidths. The studies have demonstrated three important points. The first is that the spacing of ∼ 0.1 operating wavelength between the plate and the ground plane is essential to broaden the impedance bandwidth. The second is that the slot effectively compensates for the large inductance arising from the long feeding probe. The last is that the proper selections of the slot shape and the aspect ratio of the rectangular plate are important to depress the high cross-polarization levels.