Improved Bandwidth Formulas for Fabry-Pérot Cavity Antennas Formed by Using a Thin Partially-Reflective Surface

Author

Hosseini, Amir ; Capolino, Filippo ; De Flaviis, Franco ; Burghignoli, P. ; Lovat, G. ; Jackson, David R.

Author_Institution

Henry Samueli Sch. of Eng., Univ. of California, Irvine, Irvine, CA, USA

Volume

62

Issue

5

fYear

2014

fDate

May-14

Firstpage

2361

Lastpage

2367

Abstract

The power bandwidth of Fabry-Pérot-cavity antennas comprised of a thin partially-reflective-surface (PRS) above a perfectly conducting ground plane, based on its transverse-equivalent-network model and the simple susceptance model of a thin PRS, is studied. Considering the frequency variation of the PRS susceptance model, a new formula is proposed to estimate the power density bandwidth and thus (approximately) the gain bandwidth of such cavities. The application and accuracy of the proposed formula are investigated using both numerical (i.e., based on full-wave simulations) and analytical (i.e., based on a transmission-line model of the antenna) methods. Finally, the accuracy of the proposed formula is investigated for cavities formed using a finite versus infinite PRS.

Keywords

frequency selective surfaces; leaky wave antennas; Fabry-Pérot cavity antennas; PRS susceptance model; finite PRS; frequency variation; improved bandwidth formula; infinite PRS; leaky-wave antenna; power density bandwidth; thin metallic frequency-selective-surface; thin partially-reflective surface; transverse-equivalent-network model; Bandwidth; Cavity resonators; Density measurement; Frequency selective surfaces; Numerical models; Power system measurements; Fabry-Pérot cavity (FPC) antenna; leaky-wave antenna (LWA); thin metallic frequency-selective-surface (FSS); thin partially-reflective-surface (PRS);

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2014.2307337

Filename

6746235