Wide-band measuring antenna

A broadband and antenna technology, which is applied in the field of broadband and high-phase center stability measurement antennas, can solve the problem of not being able to cover the 2.491GHZ frequency of Beidou Phase II, and achieve the effects of excellent low-elevation angle characteristics, simple processing and low cost.

Inactive Publication Date: 2013-02-20
北京长征宇通测控通信技术有限责任公司
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AI Technical Summary

Problems solved by technology

At present, high-precision measurement antennas at home and abroad generally use double-layer microstrips or oscillators, and the frequency can only cover 1.1GHZ~1.6GHZ, and cannot cover the 2.491GHZ frequency of Beidou Phase II.

Method used

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Embodiment Construction

[0020] The working and design principles of the broadband measuring antenna of the present invention are: the operating bandwidth of the antenna is determined by two aspects, the one is the impedance bandwidth of the antenna, i.e. the standing wave of the antenna, and the 2nd is the pattern bandwidth of the antenna, i.e. the Shape and gain, both of which must meet the bandwidth required by the system is the working bandwidth of the antenna. The impedance bandwidth of the general vibrator antenna is very narrow. The cross-printed vibrator used in the present invention is fed in the form of microstrip line backfeed, and uses Balun to achieve broadband matching. Its impedance bandwidth can reach one or several octaves, affecting A factor of the antenna's bandwidth is generally the antenna's pattern bandwidth. The vibrator antenna generally radiates in two directions. During normal use, a reflective cavity or absorbing material must be added to reflect or absorb the electromagneti...

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Abstract

The invention relates to a wide-band measuring antenna which is mainly used in satellite navigation accurate measurement and integrated monitoring of multisystem navigation signals. The antenna mainly comprises a micro-strip printed board, a cross printing oscillator, a three-dimensional choking coil, S feeder lines, auxiliary cables and support frames. The printing oscillator is installed in the three-dimensional choking coil through fixing clamps, and power is fed through a wide-band feed network corroded on the back surface of the oscillator; and the four semi-steel cables penetrate through the bottom of the three-dimensional choking coil to feed the micro-strip printed board. The wide-band measuring antenna has a wide band, outstanding ups and downs at low elevation angles, a wide-angle circular polarization axial ratio and a high-phase central stability, and can cover all navigation system bands of a global positioning system (GPS), bei dou and the like simultaneously.

Description

technical field [0001] The invention relates to a satellite navigation antenna, in particular to a broadband high phase center stability measuring antenna. Background technique [0002] With the continuous development of the US GPS system, the Russian GLONASS system, the Galileo system, and my country's "Beidou-2" satellite navigation and positioning system, satellite navigation precision measurement technology has been widely used in many fields of economic construction and scientific research, especially in geodesy. And related disciplines, including marine geodesy, resource exploration, engineering survey and engineering deformation monitoring, etc. As an important part of the monitoring receiver, the wide-band high-precision measurement antenna is directly related to the measurement accuracy of the receiver. Among them, the phase center change and multipath effect of the antenna are significant error sources in the receiver system, while The low elevation gain of the ant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/36H01Q1/38H01Q9/04H01Q13/08
Inventor 刘庆辉郭丽刘昊
Owner 北京长征宇通测控通信技术有限责任公司
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