CN212783798U

CN212783798U - Single-panel UWB antenna based on trapped wave structure

Info

Publication number: CN212783798U
Application number: CN202020553604.XU
Authority: CN
Inventors: 李磊; 李艺
Original assignee: Techbloom Beijing Information Technology Co ltd
Current assignee: Techbloom Beijing Information Technology Co ltd
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2021-03-23
Anticipated expiration: 2030-04-15

Abstract

The invention discloses a single-panel uwb antenna based on a trapped wave structure, and belongs to the technical field of microwaves. Comprises a radiating element (100) for radiating a signal; a coplanar waveguide transmission line (101) for transmitting signals; a defective metallic ground plane (102) serving as a ground for the antenna; a single-sided dielectric substrate (104) for carrying a metal portion of an antenna; the radiating array adopts a circular mode, so that the impedance matching bandwidth of the antenna is greatly improved, and the cut angle of the grounding plate is processed to more effectively expand the bandwidth of the antenna. The antenna has good omnidirectional radiation characteristic and stable gain effect in the full UWB frequency band, has good standing wave, and is suitable for UWB wireless communication or positioning systems.

Description

Single-panel UWB antenna based on trapped wave structure

Technical Field

The invention relates to a single-panel UWB antenna based on a trapped wave structure, in particular to a single-panel UWB antenna, which ensures the bandwidth of the antenna and has good radiation characteristic and omnidirectional characteristic.

Background

Modern wireless communication field, especially digital mobile communication, faces the situation that the number of users increases sharply and frequency resources are increasingly tense, and the wireless communication field develops many different kinds of services to relieve the contradiction between the requirements of users on service quality and wireless propagation environment, wherein, an ultra wide band and short-distance wireless communication system applying a pulse communication form can share the frequency band with the traditional wireless communication system, thereby effectively relieving the current situation of spectrum resource shortage, and the technology draws great attention in the wireless communication field.

The UWB communication is different from the traditional narrow-band and wide-band communication, especially has high-speed transmission which cannot be compared with other wireless technologies in the aspect of short-distance wireless communication, and can quickly and effectively connect electronic equipment such as personal computers, televisions, multimedia, mobile phones and the like to form a personal area network so as to share resources such as photos, music, videos and the like.

Because the ultra-wideband antenna is a key component of an ultra-wideband communication system, research on the ultra-wideband antenna is also concerned, and with the development of high-speed integrated circuits, research on the ultra-wideband antenna is developing towards the discovery of miniaturization and integration.

Disclosure of Invention

The invention aims to expand the bandwidth of the UWB antenna, so that the UWB antenna has good radiation characteristic in a UWB frequency band, the cost of the antenna is effectively reduced by using the single-panel medium substrate, the traditional trapezoidal radiation patch is changed into a circular radiation patch, the impedance matching bandwidth of the antenna is greatly improved, and the ground plate corner cut treatment can effectively expand the bandwidth of the antenna.

In order to solve the technical problems, the invention adopts the following technical scheme:

according to the invention, a single-panel UWB antenna based on a notch structure is provided, which comprises a radiation oscillator (100) for radiating a signal; a coplanar waveguide transmission line (101) for transmitting signals; a defective metallic ground plane (102) serving as a ground for the antenna; a single-sided dielectric substrate (104) for carrying a metal portion of an antenna; the radiating array adopts a circular mode, so that the impedance matching bandwidth of the antenna is greatly improved, and the cut angle of the grounding plate is processed to more effectively expand the bandwidth of the antenna.

Furthermore, the invention provides a single-panel UWB antenna based on a notch structure, which uses the structure of a single-panel dielectric substrate (104).

Furthermore, the invention provides a single-panel UWB antenna based on a notch structure, wherein the radiation oscillator (100) is circular.

Furthermore, the single-panel UWB antenna based on the notch structure provided by the invention has the advantages that the defect part of the metal grounding plate is in a right-angled triangle shape.

Furthermore, the single-panel UWB antenna based on the notch structure adopts the coplanar waveguide transmission line (101) as the transmission line.

By adopting the technical scheme, the invention has the following technical effects:

the UWB antenna has the characteristics of low cost, good omni-directionality and extremely wide bandwidth, and is easy to process and integrate.

Drawings

Fig. 1 is a perspective structure of an antenna.

Fig. 2 is a graph of the antenna standing wave calculated using HFSS software.

Fig. 3 is an antenna gain curve calculated using HFSS software.

Detailed Description

The technical scheme of the invention is further explained in detail by combining the attached drawings:

reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

As shown in fig. 1, the structure of the present invention is: comprises a radiation array (100) for radiating a signal; a coplanar waveguide transmission line (101) for transmitting signals; a defective metallic ground plane (102) serving as a ground for the antenna; a single-sided dielectric substrate (104) for carrying a metal portion of an antenna; the radiating array adopts a circular mode, so that the impedance matching bandwidth of the antenna is greatly improved, and the cut angle of the grounding plate is processed to more effectively expand the bandwidth of the antenna.

In fig. 1, the antenna radiation patch has a prototype structure with a radius of 10 mm, the lower end of the antenna radiation patch is connected with a coplanar waveguide transmission line, the radiation patch is made of copper materials, the copper materials and the ground plate are etched on the same side of a dielectric plate, and coplanar waveguide with characteristic impedance of 50 omega is used for feeding.

In fig. 1, the partial grounding plate is chamfered to reasonably and effectively expand the bandwidth of the antenna.

The dielectric substrate in FIG. 1 had a dielectric constant of 4.4 and a thickness of 1.6mm, and a single panel was used.

Fig. 2 shows a standing wave characteristic diagram of the present antenna.

In fig. 2, the abscissa is frequency component, the unit is GHz, and the ordinate is standing wave component, the operating frequency band of the UWB antenna of the present invention is in the range of 3.5-7GHz, the standing wave property of the RFID antenna of the present invention, as can be seen from fig. 2, the standing wave of the antenna is less than 2 in this bandwidth, and the antenna has good radiation characteristics.

Fig. 3 shows a gain characteristic diagram of the present antenna.

Fig. 3 shows that the horizontal axis is frequency component, the unit is GHz, the vertical axis is amplitude component, the unit is db, the working frequency band of the UWB antenna is within the range of 3.5-7GHz, the gain attribute of the antenna is smooth and stable in the bandwidth, and the gain stability is good as can be seen from fig. 3.

In summary, the present invention provides a single-panel UWB antenna based on a notch structure, in which a coplanar waveguide is used for feeding and a circular radiation patch is used for radiation. Further, the bandwidth is increased tangentially. The main structure of the invention is processed and manufactured by adopting a single-sided printed circuit board, thereby greatly reducing the production cost.

The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A single-panel UWB antenna based on a notch structure is characterized in that:

a radiating array (100);

a coplanar waveguide transmission line (101);

a defective metallic ground plane (102);

a single-sided dielectric substrate (104).

2. The single-panel UWB antenna based on a notch structure of claim 1 wherein: the radiating array is circular.

3. The single-panel UWB antenna based on a notch structure of claim 1 wherein: the dielectric substrate is a single-sided plate.

4. The single-panel UWB antenna based on a notch structure of claim 1 wherein: the defective triangle in the metal grounding plate is a right-angled triangle.

5. The single-panel UWB antenna based on a notch structure of claim 1 wherein: is in an axisymmetric structure.