A Wideband Electric Small Antenna Based on Interdigitated Capacitive Loops

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: 2022-07-05
CHONGQING UNIV
View PDF4 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Wideband Electric Small Antenna Based on Interdigitated Capacitive Loops
  • A Wideband Electric Small Antenna Based on Interdigitated Capacitive Loops
  • A Wideband Electric Small Antenna Based on Interdigitated Capacitive Loops

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

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

[0036] The antenna radiation unit includes an interdigitated capacitive ring 1 for multi-mode superimposed radiation, a monopole radiation metal strip 3 used to excite the interdigitated capacitive ring 1, and a semicircular dielectric substrate 2; The interdigitated capacitive ring 1 is etched on the outer edge of one side of the semicircular dielectric substrate 2, and the other side of the semicircular dielectric substrate 2 is also etched with monopole radiation metal strips 3. The circular dielectric subs...

Embodiment 2

[0045] like figure 2As shown, a broadband circularly polarized electric small antenna based on an interdigitated capacitive loop includes two antenna radiating units, a ground plate 4, and a 50-ohm coaxial cable 5;

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a broadband electric small antenna based on an interdigitated capacitive loop, comprising an antenna radiating unit, a ground plate, and a 50Ω coaxial feed. The antenna radiating unit includes an interdigitated capacitive loop, a monopole Radiating metal strips, semicircular dielectric plates; the interdigitated capacitive ring includes several interdigitated modules and etched at equal intervals on the outer edge of one side of the semicircular dielectric plate, and the other side of the semicircular dielectric plate. The side is also etched with a monopole radiation metal strip, the bottom end of the monopole radiation metal strip is connected with the 50Ω coaxial feed inner conductor, and the 50Ω coaxial feed outer conductor is connected with the ground plate; By changing the physical size of the antenna without affecting the radiation efficiency of the antenna, the bandwidth of the electrically small antenna is doubled, and it has the advantages of directional gain, high radiation efficiency and wide bandwidth within the frequency band.

Description

technical field [0001] The invention relates to the technical field of electric small antennas, and relates to a broadband electric small antenna based on an interdigitated capacitive loop. Background technique [0002] With the upgrading and upgrading of wireless systems, the size of antennas and RF front-ends is very prominent, and the application of small electric antennas is limited due to their limited bandwidth. Therefore, expanding the bandwidth of electric small antennas has become a research hotspot in the field of current antennas. Generally, the methods of expanding the antenna bandwidth often consider methods such as adding resonant structures and loading active circuits. These methods are not effective when the antenna is deeply miniaturized, increase the design complexity, and reduce the radiation efficiency of the antenna. In recent years, the near-field coupled resonance technology has been widely used in the design of electrically small antennas to improve t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityPatents(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