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Compact ultra-wideband omnidirectional antenna

An omnidirectional antenna and ultra-wideband technology, which is applied to antennas, devices that make antennas work in different bands at the same time, electrical components, etc., which can solve the problems of small antenna impedance bandwidth and failure to cover the 5G frequency band.

Active Publication Date: 2021-06-01
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the impedance bandwidth of the above antenna is less than 55% and cannot cover the 5G frequency band (3.4~3.6GHz)

Method used

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  • Compact ultra-wideband omnidirectional antenna
  • Compact ultra-wideband omnidirectional antenna

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Embodiment Construction

[0020] 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.

[0021] like Figure 1 to Figure 3 As shown, it is the specific structure in this embodiment:

[0022] A compact, ultra-broadband omnidirectional antenna, comprising a first metal layer (1), a second metal layer (2), and a dielectric substrate (3);

[0023] The material used for the dielectric substrate (3) is FR-4. The first metal layer (1) is printed on the upper layer of the dielectric substrate (3), and the second metal layer (2) is printed on the lower layer of the dielectric substrate (3).

[0024] The first metal layer (1) and the second metal layer (2) are fed by a coaxial joint (14).

[0025] The parameters used in the embodiment are that the th...

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Abstract

The invention relates to a compact ultra-wideband omnidirectional antenna comprising a first metal layer, a second metal layer and a dielectric substrate. The first metal layer and the second metal layer are printed on the upper layer and the lower layer of the dielectric substrate respectively, and each metal layer is composed of a double-branch flag-shaped radiator, double parasitic bands, a curved groove, a short open-circuit branch knot and a center metal disc. A short branch is loaded on a conical feed structure, the reactance characteristic of the antenna at high frequency is effectively suppressed, a high-frequency resonance point is introduced, and when double parasitic bands are added, a new resonance point is added between two existing resonance points, so that the bandwidth is improved, the 1.8-3.85 GHz passband characteristic is formed. A short open-circuit branch knot is added to the tail end of the first branch knot, a curve-shaped groove is etched, capacitive coupling and a current path are increased, and the low-frequency cut-off frequency is reduced. Finally, the impedance bandwidth of the antenna can reach 78% (1.69-3.85 GHz), in the impedance bandwidth, the cross polarization level on the horizontal plane is smaller than-20 dB, and the efficiency in the working frequency band is 80%-91%.

Description

technical field [0001] The invention relates to the field of antenna engineering, in particular to a compact, ultra-wideband omnidirectional antenna. Background technique [0002] With the increase of mobile data services, enhanced functions, and the rapid growth of the number of users, indoor services have higher requirements on data transmission rate, system capacity, and performance. As an indispensable technology in 4G and 5G communication systems, multiple-input multiple-output (MIMO) technology has attracted widespread attention. This technology can improve the data transmission rate, reliability, channel capacity and communication quality of wireless communication in complex scattering environment, and realize the effective utilization of space resources. At the same time, omnidirectional antennas have attracted extensive attention due to their ability to provide 360° full coverage and reduce communication dead zones. In addition, the space in wireless communication...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q5/50H01Q5/385
CPCH01Q1/38H01Q5/50H01Q5/385
Inventor 李道通邓裔刘颖谭晓衡陈朕郑志锐王居安
Owner CHONGQING UNIV
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