Traveling Wave Excitation Antenna And Planar Antenna
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United States of America Patent
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Issued Date -
Jan 31, 2013
app pub date -
Jul 27, 2012
filing date -
Jul 29, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An object is to suppress radiation of a cross polarized wave by a microstrip antenna to improve cross polarization discrimination of the traveling wave excitation antenna. A microstrip antenna wherein: a feed line 21 through which a traveling wave propagates, and a radiating element 22 that is excited by the traveling wave are formed on a dielectric substrate 1, and wherein: the radiating element 22 has a radiating part 22A for radiating a co-polarization wave, and an open stub 22B that has a stub length 22A substantially equal to λg/4 and that extends from the radiating part toward a cross polarization direction. Therefore, without changing an element width Lb of the radiating element 22, radiation of a cross polarized wave by the radiating element 22 can be suppressed to improve cross polarization discrimination.
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