Design of multioctave spiral-mode microstrip antennas

Author

Wang, Johnson J H ; Tripp, Victor K.

Author_Institution

Georgia Tech. Res. Inst., Atlanta, GA, USA

Volume

39

Issue

3

fYear

1991

fDate

3/1/1991 12:00:00 AM

Firstpage

332

Lastpage

335

Abstract

The design of spiral-mode microstrip antennas with a bandwidth of 6:1 is demonstrated. The antenna has a small dissipative loss due to a resistive loading outside its active region. As a specific measure of bandwidth at microwave frequencies, the spiral-mode microstrip antenna gain is higher than that of the conventional loaded-cavity spiral over a 5:1 and if the spacing d between the microstrip and the ground plane is 0.25 in. or larger over the 2-12 GHz range. Cursory efficiency calculations show consistent improvement over a loaded-cavity spiral. A study of ground plane spacing showed that the antenna gain remains above the conventional spiral gain as d is reduced until it is as small as 0.1 in

Keywords

antenna radiation patterns; microstrip antennas; 2 to 12 GHz; SHF; antenna gain; bandwidth; dissipative loss; efficiency calculations; ground plane spacing; microstrip antennas; microwave frequencies; multioctave spiral mode antenna; resistive loading; Antenna measurements; Bandwidth; Frequency measurement; Gain measurement; Loaded antennas; Microstrip antennas; Microwave antennas; Microwave frequencies; Microwave measurements; Spirals;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.76330

Filename

76330