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Three-frequency-range common-caliber active navigation antenna

A technology of common aperture and frequency band, applied in the field of three-band common aperture active antenna, can solve the problems of insufficient working frequency band of navigation antenna, low elevation gain of pattern, and low radiation efficiency, so as to eliminate out-of-band interference and widen the working frequency band. , the effect of improving radiation efficiency

Inactive Publication Date: 2015-08-12
XIDIAN UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the above-mentioned existing navigation antennas, and proposes a three-band common-aperture active navigation antenna, which is used to solve the problem that the existing navigation antennas have insufficient operating frequency band, low radiation efficiency, and low elevation angle gain of the pattern. The problem

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Embodiment Construction

[0024] Below in conjunction with accompanying drawing and specific embodiment, the present invention will be further described:

[0025] refer to figure 2, the present invention includes a common-aperture antenna unit 1, a filter 2, a low-noise amplifier 3 and a back cavity 4; the common-aperture antenna unit 1 includes a radiator, a metal reflector and a feed network, wherein the radiator includes a high-frequency parasitic A high-frequency radiator composed of a unit and a high-frequency radiation unit, a medium-frequency radiator, and a low-frequency radiator composed of a low-frequency parasitic unit and a low-frequency radiation unit, the high-frequency parasitic unit, high-frequency radiation unit, medium-frequency radiator and low-frequency parasitic unit A coaxial stacked structure is sequentially formed from top to bottom, and the coaxial stacked structure is supported above the low-frequency radiation unit through the first dielectric stud to realize the three-band ...

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Abstract

The invention discloses a three-frequency-range common-caliber active navigation antenna, for solving the problems of not wide enough work frequency band of a conventional navigation antenna, low radiation efficiency and low elevation angle gain of a directional diagram. The three-frequency-range common-caliber active navigation antenna comprises a common-caliber antenna unit (1), a filter (2), a low-noise amplifier (3) and a back cavity (4). The common-caliber antenna unit (1) comprises a high-frequency radiator, an intermediate frequency radiator and a low frequency radiator, the three radiators are successively laminated from top to bottom, and the high frequency radiator and the low frequency radiator employ capacitance coupling feed and introduce parasitic patches; the filter (2) and the low-noise amplifier (3) are disposed below the common-caliber antenna unit (1) and are installed in the cavity of the back cavity (4); and the common-caliber antenna unit (1), the filter (2) and the low-noise amplifier (3) are successively connected. The three-frequency-range common-caliber active navigation antenna can realize multiplexing of antennas of three system frequency ranges and also has the advantages of wide work frequency band and good radiation characteristic, thereby being applied to reception of signals of a satellite navigation system.

Description

technical field [0001] The invention belongs to the technical field of antennas, and relates to a three-band common-aperture active antenna, which can be used for signal reception of a satellite navigation system. Background technique [0002] Global Navigation Satellite System (GNSS) is a satellite-based radio navigation system whose main function is to provide high-quality positioning, navigation and timing services to global users by using satellites. As an important space infrastructure, satellite navigation system has been widely used in politics, economy, military and daily life, and plays an irreplaceable role in various fields. [0003] Because satellite navigation systems play an important role in modern society, major powers and interest groups in the world have established satellite navigation systems independently or jointly. At present, the satellite navigation systems that have been built and are in operation mainly include the Global Position Systems (GPS) of...

Claims

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Application Information

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IPC IPC(8): H01Q1/36H01Q1/38H01Q23/00H01Q1/50H01Q5/00H01Q1/28
Inventor 翁子彬焦永昌张立赵钢张驰倪涛马萧萧
Owner XIDIAN UNIV
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