Parametric Study of the Rectangular Microstrip Antenna with an Air Gap

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Nirun Kumprasert
King Mongkut’'s University of Technology Thonburi, Bangmod, Toongkru, Bangkok 10140
Chalermpol Namkang
King Mongkut’'s University of Technology Thonburi, Bangmod, Toongkru, Bangkok 10140
Taspong Tassri
King Mongkut’'s University of Technology Thonburi, Bangmod, Toongkru, Bangkok 10140

Abstract

This paper presents parametric study of the rectangular microstrip antenna with an air gap.The air gap is inserted between the dielectric substrate and the ground plane for obtaining a largerbandwidth than a conventional antenna. The closed form expressions are proposed to calculate theresonant frequency, input impedance, and bandwidth of the antenna. The calculated results basedon the closed forms are compared with experimental results and very good agreements are achieved.From experiments, it is found that the resonant frequency and the bandwidth increase while the airgap thickness is increased. In addition, the bandwidth increases while the ratio between the totalthickness and the free space wavelength is increased.

Article Details

Issue
Vol. 24 No. 2 (2001): May - August
Section
Original Articles
Author Biographies

Nirun Kumprasert, King Mongkut’'s University of Technology Thonburi, Bangmod, Toongkru, Bangkok 10140

Associate Professor (Deceased), Department of Electronics and Telecommunication Engineering

Chalermpol Namkang, King Mongkut’'s University of Technology Thonburi, Bangmod, Toongkru, Bangkok 10140

Associate Professor, Department of Electronics and Telecommunication Engineering

Taspong Tassri, King Mongkut’'s University of Technology Thonburi, Bangmod, Toongkru, Bangkok 10140

Graduate Student, Department of Electronics and Telecommunication Engineering