volume | PIER Journals

Abstract

In this paper, we discuss the impedance and radiation properties of planar UWB (any ultra wide frequency band) dual-polarized antennas. While their performance is usually defined using the impedance bandwidth, some applications require pattern stability over broad frequency bands. An analysis of the behaviour of three UWB dual-polarized antennas (Bowtie Antenna, Toothed Log-Periodic Antenna and Sinuous Antenna) showed interesting conclusions in terms of impedance matching bandwidth and radiation pattern steadiness. Starting from there, we then developed a method that consists in meandering the original structure. This method allows for miniaturization as well as radiation bandwidth enhancement. As a final result, an electrically small antenna with an impedance bandwidth of more than a decade and a steady radiation pattern over it has been developed.

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Ms. Nina Lorho

Dr. William Hubert

Dr. Sebastien Lestieux

Dr. Anne Chousseaud

Prof. Tchanguiz Razban-Haghighi