A Quasi Yagi Antenna Backed by a Metal Reflector

A Quasi Yagi Antenna Backed by a Metal Reflector

A quasi Yagi antenna is presented that provides off-axis radiation when backed by a metal reflector. The off-axis radiation pattern is achieved by an increase in the substrate thickness beneath the antenna elements. At 2.4 GHz the antenna demonstrated a bandwidth of 190 MHz, beam tilt towards the en...

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Veröffentlicht in:IEEE transactions on antennas and propagation 2008-12, Vol.56 (12), p.3868-3872
Hauptverfasser: Melais, S.E., Weller, T.M.
Format: Artikel
Sprache:eng
Schlagworte:
Antenna radiation patterns
Antennas
Applied sciences
Bandwidth
Beam steering
Beams (radiation)
Dielectrics
Directive antennas
end fire
Exact sciences and technology
Fires
Gain
Ground plane
metal backing
Microstrip antenna arrays
Microstrip antennas
Noise levels
Periodic structures
Quasi Yagi
Radiocommunications
Reflectors
Surface impedance
Telecommunications
Telecommunications and information theory
Yagi antennas
Yagi-Uda antennas
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Beschreibung
Zusammenfassung:A quasi Yagi antenna is presented that provides off-axis radiation when backed by a metal reflector. The off-axis radiation pattern is achieved by an increase in the substrate thickness beneath the antenna elements. At 2.4 GHz the antenna demonstrated a bandwidth of 190 MHz, beam tilt towards the end fire direction (thetas = 42 deg ) , maximum gain of 4.5 dB, and a radiation efficiency of 87%. The results of a study on bandwidth, gain and radiation pattern versus substrate thickness are presented herein. To the best of the authors' knowledge previous realization of this antenna over a ground plane has not been investigated.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2008.2007403