Broadband Fabry-Pérot radiation based on a non-Foster cavity boundary

Fabry-Perot (FP) cavities having at least one partially reflective surface are widely used as compact and efficient high-directivity radiators. However, they inherently suffer from very narrow directivity bandwidths around the FP resonance. Here it is shown that this constraint can be overcome by using an active non-Foster cavity boundary behaving as a series negative LC tank circuit. Analytical and full-wave numerical results reveal the possibility of nearly tenfold improvement of - 1 dB directivity bandwidth while preserving the original overall antenna size and directivity of the antenna.


Published in:
Electronics Letters- IEE, 49, 4, 239-240
Year:
2013
Publisher:
Hertford, Institution of Engineering and Technology
ISSN:
0013-5194
Laboratories:




 Record created 2012-12-20, last modified 2018-03-17


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