Active Integrated Antenna Design Using a Contact-Less, Proximity Coupled, Differentially Fed Technique

Research output: Contribution to journalArticle

Authors

Colleges, School and Institutes

Abstract

A novel contact-less, differential feeding technique suitable for integrated active antenna design is demonstrated. This technique utilizes an odd mode signal to generate fringing fields on either side of a microstrip gap under the antenna. This allows electromagnetic energy to be efficiently coupled from the transmission lines to the radiating antenna. In a balanced integrated antenna amplifier configuration, the proposed non-contact feeding method removes the need for any balun or power combining network. Hence in theory, a compact RF front-end design with lower losses can be realized. This feeding method has been successfully applied to the design of simple passive microstrip patch antennas and active integrated antennas (AIA). Simulated and measured results are also included to validate the proposed feeding concept and antenna designs. The performance of the proposed differential feeding technique on a simple microstrip patch antenna has been systematically studied. The study suggests that the proposed proximity method is broadband in nature, allowing antennas operating at different resonant frequencies to be swapped without the need to change the feed dimensions and without degrading the matching performance.

Details

Original languageEnglish
Pages (from-to)267-276
Number of pages10
JournalIEEE Transactions on Antennas and Propagation
Volume55
Issue number2
Publication statusPublished - 1 Feb 2007

Keywords

  • proximity coupling, microstrip antenna, push-pull amplifier and differentially fed antenna, active integrated antenna (AIA), differential antenna, contact-less coupling