Broadband electrically small antenna based on interdigitated capacitive ring

An electrically small antenna and capacitive technology, which is applied to the antenna grounding device and the structural form of the radiating element, can solve the problems of inconspicuous effect, reduced antenna radiation efficiency, and increased design complexity, and achieves wide application value and high radiation efficiency. , the effect of simple structure

Active Publication Date: 2021-02-09
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, the method of expanding the bandwidth of the antenna often considers adding a resonant structure, loading an active circuit, etc., these methods are not effective when the antenna depth is miniaturized, the design complexity increases, and the radiation efficiency of the antenna will be reduced.
In recent years, near-field coupling resonance technology has been widely used in the design of electrically small antennas to improve antenna radiation efficiency, but the bandwidth of electrically small antennas has not been significantly improved.
Some researchers use varactor diodes and active circuits to increase the instantaneous bandwidth of antennas, but this will increase the complexity and cost of antenna design, and there are few reports on designs that significantly expand the bandwidth of electrically small antennas and have a simple structure.

Method used

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  • Broadband electrically small antenna based on interdigitated capacitive ring
  • Broadband electrically small antenna based on interdigitated capacitive ring
  • Broadband electrically small antenna based on interdigitated capacitive ring

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Such as figure 1 As shown, a broadband linearly polarized electric small antenna based on an interdigitated capacitive loop includes an antenna radiation unit, a ground plate 4, and a 50Ω coaxial line feed 5;

[0035] The antenna radiation unit is vertically arranged on the ground plate 4, the antenna radiation unit is connected to the inner conductor of the 50Ω coaxial line feed 5, and the outer conductor of the 50Ω coaxial line feed 5 is connected to the ground plate 4;

[0036] The antenna radiating unit includes an interdigitated capacitive ring 1 for multi-mode superposition radiation, a monopole radiation metal strip 3 for exciting the interdigitated capacitive ring 1, and a semicircular dielectric plate 2; The interdigitated capacitive ring 1 is etched on the outer edge of one side of the semicircular dielectric plate 2, and the other side of the semicircular dielectric plate 2 is also etched with a monopole radiation metal strip 3. The circular dielectric plate...

Embodiment 2

[0045] Such as figure 2 As shown, a broadband circularly polarized electric small antenna based on an interdigitated capacitive loop includes two antenna radiation elements, a grounding plate (4), and a 50-ohm coaxial cable (5);

[0046]Two antenna radiating units are stacked orthogonally and are vertically arranged on the ground plate (4). The antenna radiating unit includes an interdigitated capacitive loop 1 for multi-mode superimposed radiation, which is used to stimulate interdigitated The monopole radiation metal strip 3 of the capacitive ring 1, and the semicircular dielectric plate 2; the interdigitated capacitive ring 1 is etched on the outer edge of one side of the semicircular dielectric plate 2, and the semicircular The other side of the shaped dielectric plate 2 is also etched with a monopole radiation metal strip 3, and the bottom ends of the monopole radiation metal strip 3 of the two interdigitated capacitive rings 1 are respectively connected to one end of th...

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Abstract

The invention discloses a broadband electrically small antenna based on an interdigitated capacitive ring, and the antenna comprises an antenna radiation unit, a grounding plate and a 50-ohm coaxial line feed; the antenna radiation unit comprises the interdigitated capacitive ring, a monopole radiation metal strip and a semicircular dielectric plate; the interdigitated capacitive ring comprises aplurality of interdigitated modules which are etched on the outer edge of one side of the semicircular dielectric plate at equal intervals, a monopole radiation metal strip is further etched on the other side of the semicircular dielectric plate, the bottom end of the monopole radiation metal strip is connected with a 50-ohm coaxial line feed inner conductor, and a 50-ohm coaxial line feed outer conductor is connected with the grounding plate; under the condition that the physical size of the antenna is not changed and the radiation efficiency of the antenna is not influenced, the bandwidth ofthe electrically small antenna is multiplied, and the electrically small antenna has the advantages of directional gain, high radiation efficiency and wide bandwidth in a frequency band range.

Description

technical field [0001] The invention relates to the technical field of electrically small antennas, in particular to a broadband electrically small antenna based on an interdigitated capacitive loop. Background technique [0002] With the replacement and upgrading of wireless systems, the size of antennas and RF front-ends is very prominent. The application of electrically small antennas is limited due to their limited bandwidth. Therefore, expanding the bandwidth of electrically small antennas has become a research hotspot in the field of antennas. Generally, the method of expanding the antenna bandwidth often considers adding resonant structures, loading active circuits and other methods. These methods are not effective when the depth of the antenna is miniaturized, the design complexity increases, and the radiation efficiency of the antenna is reduced. In recent years, near-field coupling resonance technology has been widely used in the design of electrically small antenn...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H01Q1/36H01Q1/38H01Q1/48
CPCH01Q1/48H01Q1/36H01Q1/38
Inventor唐明春陈晓明刘国易达
OwnerCHONGQING UNIV