Double-frequency microstrip antenna

A microstrip antenna and microstrip technology, applied in the direction of antennas, electrical short antennas, antenna components, etc., can solve the problems of unstable phase center of received signals, misalignment of phase centers, and influence on antenna receiving accuracy, so as to improve accuracy, The effect of reducing signal error and simple structure
CN101916901AActive Publication Date: 2010-12-15GUANGZHOU HI TARGET SURVEYING INSTRUMENT CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGZHOU HI TARGET SURVEYING INSTRUMENT CO LTD
Publication Date
2010-12-15

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Abstract

The invention discloses a double-frequency microstrip antenna, which comprises an upper-layer microstrip antenna with an upper-layer paster, a lower- layer of microstrip antenna with a lower-layer paster and a feed network located at the bottom layer. The geometric center of the upper-layer paster is provided with an upper-layer central hole, the geometric center of the lower-layer paster is provided with a lower-layer central hole, the double-frequency microstrip antenna is also provided with a short circuit pin which is connected with an earth wire of the feed network after sequentially penetrating into the upper-layer microstrip antenna from the upper-layer central hole and penetrating into the lower-layer microstrip antenna from the lower-layer central hole, and the short circuit pin is respectively electrically connected with the upper-layer paster and the lower-layer paster. In the invention, through fixing the geometric center of the upper-layer paster and the geometric center of the lower-layer paster together and connecting the upper-layer paster and the lower-layer paster with the earth wire of the feed network by the short circuit pin, the invention can stabilize the phase centers of the two frequency-band signals received by the double-frequency microstrip antenna, thereby reducing signal error of the double-frequency microstrip antenna and improving the signal receiving precision of the double-frequency microstrip antenna.
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Description

technical field

[0001] The present invention relates to an antenna, in particular to a dual-frequency microstrip antenna. Background technique

[0002] The dual-band microstrip antenna can be used as a measurement antenna to simultaneously receive signals from the L1 frequency band of GPS (Global Positioning System) and signals from the L2 frequency band of GLONASS (Global Navigation Satellite System). The system receiver can be used in geodetic surveying, control surveying, real-time dynamic positioning, oceanographic surveying, channel surveying, dredging surveying, aviation flight positioning, remote sensing applications, offshore drilling positioning and other measurement systems.

[0003] The existing dual-frequency microstrip antenna usually adopts a two-layer patch structure, and realizes circular polarization through offset feed or side feed. Since the antenna adopts bias feed or side feed, it is easy to make the electrical phase center of the antenna and the geomet...

Claims

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