Analysis of two aperture-coupled cavity-backed antennas

Author

Haddad, Pamela R. ; Pozar, David M.

Author_Institution

Dept. of Electr. & Comput. Eng., Massachusetts Univ., Amherst, MA, USA

Volume

45

Issue

12

fYear

1997

fDate

12/1/1997 12:00:00 AM

Firstpage

1717

Lastpage

1726

Abstract

The feasibility and performance of an aperture-coupled cavity-fed microstrip patch antenna and an aperture-coupled cavity antenna are demonstrated using reciprocity and moment method analyses, followed by practical design guidelines and equivalent circuit models. Each antenna incorporates a thick ground plane that can be useful as a heat sink for active MMIC circuitry and as structural support for thin substrates. Prototype antennas show good experimental agreement with the analyses in each case. The resonators of the aperture-coupled cavity-fed patch antenna are optimized to achieve a prototype having a measured 2:1 bandwidth of 26%. The size of the aperture-coupled cavity antenna can be easily reduced for array applications by filling the cavity with a dielectric material

Keywords

antenna feeds; antenna radiation patterns; antenna theory; aperture antennas; cavity resonators; equivalent circuits; method of moments; microstrip antennas; active MMIC circuitry; aperture-coupled cavity antenna; aperture-coupled cavity-backed antennas; aperture-coupled cavity-fed microstrip patch antenna; array applications; bandwidth; dielectric material filled cavity; equivalent circuit models; heat sink; moment method analyses; performance; practical design guidelines; prototype antennas; reciprocity; resonators; structural support; thick ground plane; thin substrates; Aperture antennas; Equivalent circuits; Guidelines; Heat sinks; MMICs; Microstrip antennas; Moment methods; Patch antennas; Performance analysis; Prototypes;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.650189

Filename

650189