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Double-frequency antenna

A dual-frequency antenna and antenna technology, applied in antennas, resonant antennas, antenna coupling, etc., can solve problems such as low elevation gain, achieve good grounding, good axial ratio bandwidth and low elevation gain, and reduce costs

Inactive Publication Date: 2011-07-06
HARXON CORP
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0009] 4. Low elevation gain

Method used

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Embodiment Construction

[0028] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0030] Such as figure 1 As shown, it is a cross-section schematic diagram of a preferred embodiment of the dual-frequency antenna of the present invention; this embodiment includes an upper layer microstrip antenna 1, a lower layer microstrip antenna 2, a dielectric layer 3, a reflector 4, and a phase-shifting feed at the back of the reflector 4 The electrical network 5 and the shielding box 6 located directly below the back of the reflector 4; in the figure, 11 is the radiation patch of the upper microstrip antenna 1, 12 is the dielectric substrate of the upper microstrip antenna 1, and 13 is the upper microstrip antenna 1 21 is the radiation patch of the l...

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Abstract

The invention relates to a double-frequency antenna comprising an upper-layer microstrip antenna, a lower-layer microstrip antenna, a baffle board and a phase shift feeding network, wherein the upper-layer microstrip antenna and the lower-layer microstrip antenna are fixed on the front of the baffle board through screws after being overlapped; the phase shift feeding network is positioned at the back of the baffle board; the upper-layer microstrip antenna carries out feeding through a double-feeding needle; the lower-layer microstrip antenna carries out coupled feeding through a via hole corresponding to the feeding needle of the upper-layer microstrip antenna on a radiating patch of the lower-layer microstrip antenna; and the feeding needle of the upper-layer microstrip antenna passes through the via hole to reach to the phase shift feeding network. The double-frequency antenna has a small size, a firm structure and a simple process and also has favorable axis ratio bandwidth and low elevation gain.

Description

technical field [0001] The invention relates to the field of antennas, in particular to a dual-frequency antenna. Background technique [0002] With the rapid development of satellite navigation technology and its wide application in various fields, the antenna performance of the handheld receiving device in the high-precision measurement satellite navigation and positioning system has also put forward higher and higher requirements, mainly in the following aspects: [0003] 1. Good circular polarization performance [0004] In satellite communication, because of the small attenuation of circularly polarized waves in rain and snow, and their strong ability to penetrate the ionosphere, they are not affected by the Faraday effect of the magnetic field at the two poles of the earth. Satellite communications generally use circularly polarized signals. Therefore, the antenna should also work in a good circular polarization state to better match the system. [0005] 2. Can accep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q5/00H01Q23/00H01Q9/04H01Q1/52H01Q1/48H03H7/18H01Q21/30
Inventor 黄毅王春华
Owner HARXON CORP
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