| 摘要 |
The present invention relates to a circular polarized antenna with a dielectric substrate (11) comprising a front and a back dielectric face (12, 13), a first and a second subantenna (14, 15), each comprising a first and a second element for radiating and receiving circular polarized electromagnetic signals, the first and second subantenna being arranged orthogonal to each other on the dielectric substrate (11) and having essentially conjugate complex impedances, a transmission line (18, 25, 30, 46) connected with the first and second subantenna for transmitting signals to and from said first and second subantenna and a reflector (16) spaced to and parallel with the back face (23) of the dielectric substrate (11), a low loss material (17) being located between said reflector means (16) and said back face (13). This structure provides a radiation pattern with a variable shape. Further, this antenna can be printed onto a corresponding substrate and therefor be produced at low cost.
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