A Novel Dual-frequency Dual-polarized Omnidirectional Antenna
An omnidirectional antenna, dual-polarization technology, applied in the field of antennas, to achieve the effect of good omnidirectional performance and high application value
Active Publication Date: 2019-03-05
XIDIAN UNIV
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Problems solved by technology
[0004] In order to solve the problem that the existing omnidirectional antenna cannot work in two different frequency bands with two different polarization modes at the same time, this invention proposes a new type of dual-frequency dual-polarization omnidirectional antenna, which uses a circular patch to load The form of slots and short-circuit posts enables an antenna to radiate in two different frequency bands in the form of omnidirectional circular polarization and omnidirectional linear polarization.
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[0022] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:
[0023] In order for a single antenna to work simultaneously in the GPS frequency band and the WLAN frequency band, it needs to have omnidirectional radiation characteristics.
[0024] Such as figure 1 As shown, a new dual-frequency dual-polarized omnidirectional antenna includes a dielectric board 1, an upper patch 2, a lower patch 3, an upper terminal open circuit slot 4, a lower terminal open circuit slot 5, an upper annular slot 6, and a short circuit between the upper and lower layers. The metal hole 7 and the central feed part 8; the dielectric board 1 is a cylindrical structure, the upper layer patch 2 and the lower layer patch 3 are attached to both sides of the dielectric board 1 in the form of copper cladding, and the upper layer patch 2 is placed in eight rectangular shapes with rotational symmetry The upper-layer terminal open-circuit groove 4 and the...
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The invention relates to a novel dual-frequency dual-polarized omnidirectional antenna. According to the antenna, shorting pins are loaded onto annulus patches, so that a dual-frequency dual-polarized omnidirectional low-profile antenna integrating omnidirectional vertically polarized radiation and omnidirectional circularly polarized radiation can be formed; and the size and circular polarization performance of the antenna are optimized, and therefore, the antenna can have an omnidirectional circularly polarized radiation characteristic at low frequency bands, and has an omnidirectional linearly polarized radiation characteristic at high frequency bands. The antenna of a novel structure has excellent omnidirectional performance, can work both in a GPS frequency band and a WLAN frequency band, and has a high application value.
Description
technical field [0001] The invention belongs to the technical field of antennas, in particular to a dual-frequency dual-polarization omnidirectional antenna. Background technique [0002] Omnidirectional antennas are widely used in broadcasting and navigation systems because of their wide coverage. According to the latest regulations of the industry, an omnidirectional antenna refers to an antenna whose pattern has no directionality in a certain plane, but has a directional pattern in a plane perpendicular to it. Existing omnidirectional antennas mainly focus on omnidirectional vertically polarized antennas, omnidirectional horizontally polarized antennas and omnidirectional circularly polarized antennas. Moreover, the existing antenna can only work in a single frequency band, and cannot work in two different frequency bands in two different polarization modes at the same time. Contents of the invention [0003] technical problem to be solved [0004] In order to solve ...
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IPC IPC(8): H01Q21/24H01Q1/38
CPCH01Q1/38H01Q21/24
Inventor 栗曦刘熠杨林
Owner XIDIAN UNIV