✦ LIBER ✦

A feeding technique for broadbanding and dual-banding microstrip antenna

✍ Scribed by Koichi Sakaguchi; Nozomu Hasebe

Book ID: 102822490
Publisher: John Wiley and Sons
Year: 1993
Tongue: English
Weight: 691 KB
Volume: 76
Category: Article
ISSN: 8756-6621
DOI: 10.1002/ecja.4410760410

No coin nor oath required. For personal study only.

✦ Synopsis

A method for broadbanding and dual banding of the microstrip antennas (MSA) is proposed and discussed. The effect of errors at the time of fabrication of the MSA also is studied. The method described in this paper combines a transformer made of a distributed circuit with the MSA. The design consists of three steps. Since the radiating element and the transformer are separated completely by the ground plane in the present method, the technique can be applied to an MSA with an arbitrary shape without applying any fabrication on the radiating element. Broadbanding can be accomplished rather easily, and the dual-banding can be accomplished with a slight modification in the design. The prototype stub-loaded MSA demonstrated with a bandwidth of 1.3 percent with a V S W R 5 2 can be increased to 3.4 percent (2.6 times). For the dual-banding, the separation rate of two frequencies with respect to the fundamental resonant frequency can be controlled by about 2 to 5 percent.

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