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A compact, ultra-wideband omnidirectional antenna

An omnidirectional antenna and ultra-wideband technology, which is applied to antennas, devices that make the antenna work in different bands at the same time, electrical components, etc. It can solve the problems of small antenna impedance bandwidth and not being able to cover the 5G frequency band, and reduce the low frequency cut-off frequency. , the effect of expanding the working frequency band and increasing the bandwidth

Active Publication Date: 2022-08-05
CHONGQING UNIV
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  • Abstract
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  • 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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  • A compact, ultra-wideband omnidirectional antenna
  • A compact, ultra-wideband omnidirectional antenna
  • A compact, ultra-wideband omnidirectional antenna

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Embodiment Construction

[0019] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the protection scope of the present invention can be more clearly defined.

[0020] like Figure 1 to Figure 3 shown, the specific structure in this embodiment:

[0021] A compact, ultra-wideband omnidirectional antenna, comprising a first metal layer (1), a second metal layer (2), and a dielectric substrate (3);

[0022] 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).

[0023] The first metal layer (1) and the second metal layer (2) are fed by a coaxial joint (14).

[0024] The parameters used in the embodiment are that the thickness o...

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Abstract

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 respectively printed on the upper and lower layers of the dielectric substrate, and the two layers of metal are divided by double Branch-flag radiator, double parasitic strips, curved grooves, short open-circuit branches and central metal disc; a short branch is loaded on the conical feed structure, which effectively suppresses the reactance characteristics of the antenna at high frequencies and introduces a high Frequency resonance point, when adding a double parasitic band, a new resonance point will be added between the two existing resonance points, the bandwidth will be increased, and a passband characteristic of 1.8 ~ 3.85GHz will be formed, and a short open circuit will be added at the end of the first branch. Branches and etched a curved slot increase capacitive coupling and current path, lowering the low frequency cut-off frequency. Finally, the impedance bandwidth of the antenna can reach 78% (1.69-3.85GHz). Within the impedance bandwidth, the cross-polarization level on the horizontal plane is less than -20dB, 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 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. Meanwhile, omnidirectional antennas have received extensive attention due to their ability to provide 360° full coverage and reduce communication dead zones. In addition, the space in wireless communication systems suc...

Claims

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Application Information

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Patent Type & Authority Patents(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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