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An ultra-wideband low-profile vertically polarized omnidirectional antenna and its notch design method

A vertically polarized, omnidirectional antenna technology, applied to antennas, devices that make antennas work in different frequency bands at the same time, antenna grounding devices, etc., can solve problems such as complex antenna structures, achieve impedance matching, achieve low profile characteristics, The effect of small antenna aperture

Active Publication Date: 2020-12-18
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Profile height is 0.046λ min , the standing wave ratio of the antenna is less than 3 within the bandwidth of 8.5:1, and the out-of-roundness of the pattern is improved, but additional circuits are required, and the antenna structure is complex

Method used

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  • An ultra-wideband low-profile vertically polarized omnidirectional antenna and its notch design method
  • An ultra-wideband low-profile vertically polarized omnidirectional antenna and its notch design method
  • An ultra-wideband low-profile vertically polarized omnidirectional antenna and its notch design method

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Embodiment Construction

[0032] The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0033] Such as figure 1 and figure 2 Shown is the specific structure of the embodiment of the ultra-wideband low-profile vertically polarized omnidirectional antenna:

[0034] Ultra-wideband low-profile vertically polarized omnidirectional antenna, including a flat-top metal plate 1, a right-angle feed structure 2, a trapezoidal short-circuit structure 3, a parasitic metal post 4, and a metal ground 5;

[0035] The flat-top metal plate 1 has a square structure, is located in the center of the metal ground 5 , is parallel to it, and intersects the right-angle feed structure 2 and the trapezoidal short-circuit structure 3 in a straight line. The right-ang...

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Abstract

The invention discloses an ultra-wideband low profile vertically polarized omnidirectional antenna and a trap design thereof. The ultra-wideband low profile vertically polarized omnidirectional antenna comprises a flat-top metal plate, a right-angle feed structure, a trapezoidal short-circuit structure, parasitic metal columns and a metal ground. The antenna has an inverted "F"-shaped asymmetric structure. Compared with the traditional symmetric ultra-wideband omnidirectional antenna, the smaller antenna aperture can be realized; the right-angle feed structure of the antenna can achieve the ultra-wideband impedance characteristics and miniaturization; the trapezoidal short-circuit structure of the antenna can achieve impedance matching and low profile characteristics of the antenna; the two parasitic metal columns built-in the antenna can improve the radiation omnidirectional characteristics of the antenna at high frequency; as for the trap design of the antenna, a stop band is introduced in the wideband antenna by introducing an open slot at the junction of the flat-top metal plate and other structures of the antenna. The ultra-wideband low profile vertically polarized omnidirectional antenna and the trap design thereof are respectively suitable for miniaturized application of UWB and WLAN.

Description

technical field [0001] The invention relates to the field of antenna engineering, in particular to an ultra-wideband low-profile vertically polarized omnidirectional antenna and an antenna design with notch characteristics. Background technique [0002] Because ultra-wideband (UWB) antennas can effectively radiate over a wide frequency band and exhibit consistent radiation characteristics across the entire operating frequency band, they have been widely used in wireless communication, sensing, radar systems, and microwave imaging. application. The physical size of an UWB antenna is usually very large because the size of an UWB antenna is mainly determined by its lowest operating frequency. Furthermore, in some low-frequency applications such as military communications in the HF, VHF and UHF bands, UWB antennas with vertically polarized radiation patterns, i.e. monopole-like radiation patterns, are required. In these miniaturized applications, low profile and small volume a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/36H01Q1/48H01Q1/50H01Q5/314H01Q5/50
CPCH01Q1/36H01Q1/48H01Q1/50H01Q5/314H01Q5/50
Inventor 李道通张耀辉张永鸿刘颖王居安陈朕李东吴皓威
Owner CHONGQING UNIV
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