Circularly polarized pifa antenna with high stable phase center, GPS positioning system
A highly stable and circularly polarized technology, applied in the field of circularly polarized PIFA antennas and GPS positioning systems, can solve the problems of insufficient impedance and axial ratio bandwidth, and fewer antenna systems, so as to achieve improved phase stability, low cost, and easy Processing effect
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[0039] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0040] The present invention feeds the radiation part through the one-to-four Wilkinson power divider at the bottom of the rectangular dielectric plate, and properly connects the microstrip line on the output branch of the power divider to form the required phase shift at each output port, and finally realizes The feeding structure with the same feed phase amplitude and 90° phase difference in turn for each port. Each port of the power splitter excites the PIFA antenna to radiate energy through the feeding probe. By designing a symmetrical antenna structure, a symmetrical four-point uniform feeding structure, and symmetric...
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