CN114976650A

CN114976650A - Ultra-wideband UWB antenna

Info

Publication number: CN114976650A
Application number: CN202210329755.0A
Authority: CN
Inventors: 吴梅华
Original assignee: Shanghai Liankong Communication Technology Co ltd
Current assignee: Shanghai Liankong Communication Technology Co ltd
Priority date: 2022-03-28
Filing date: 2022-03-28
Publication date: 2022-08-30

Abstract

The invention discloses an ultra-wideband UWB antenna, and relates to the technical field of antennas. The ultra-wideband UWB antenna comprises a PCB, wherein a patch type antenna is pasted on the surface of the PCB and comprises a dielectric plate, a first conductor and a coupling part are arranged on the upper surface of the dielectric plate, a second conductor and a third conductor are arranged on the surface of the PCB, the first conductor is connected with the second conductor, the tail end of the second conductor is connected to a reference ground plane of the PCB, and the coupling part is directly connected with the third conductor. The dielectric plate of the patch antenna adopts a high dielectric constant material to miniaturize the antenna, is convenient to integrate into wireless equipment, is convenient for designers to integrate with wireless equipment modules, is miniaturized while considering high performance, saves space for wireless equipment manufacturers, provides an antenna solution for miniaturization of the equipment, saves cost, and provides a high-integration antenna solution for the commercial use of ultra-wideband (UWB) technology.

Description

Ultra-wideband UWB antenna

Technical Field

The invention relates to the technical field of antennas, in particular to an ultra wide band UWB antenna.

Background

Uwb (ultra Wide band) ultra Wide band is a new wireless communication technology, and its specific technology combined with ultra Wide band frequency bandwidth can provide centimeter-level positioning service. In recent years, UWB positioning technology has been applied to keyless entry systems of automobiles, and mobile phone manufacturers have also used UWB technology to implement positioning services between products. The antenna is an indispensable element in wireless communication, positioning accuracy and communication distance are affected, and designing a high-performance UWB antenna is particularly important.

With the rapid development of communication electronic products, the size of the product is reduced, and at the same time, the functions are more and more, for example, the functions of a mobile phone are more and more under the condition of size reduction, so that the antenna is miniaturized and a high-performance design is required at the same time, which is a big problem in the industry. However, the conventional UWB antenna adopts a conventional antenna technology, which results in a large size and is not suitable for integration into a product, and therefore, we propose an ultra-wideband UWB antenna which is miniaturized and has high performance, so as to solve the problems proposed in the background art.

Disclosure of Invention

The invention aims to provide an ultra-wideband UWB antenna, which solves the technical problem that the antenna cannot be miniaturized and has high performance.

In order to achieve the purpose, the invention provides the following technical scheme: the ultra-wideband UWB antenna comprises a PCB, wherein a patch type antenna is pasted on the surface of the PCB.

The patch type antenna comprises a dielectric plate, wherein a first conductor and a coupling part are arranged on the upper surface of the dielectric plate, a second conductor and a third conductor are arranged on the surface of the PCB, the first conductor is connected with the second conductor, the tail end of the second conductor is connected to a reference ground plane of the PCB, the coupling part is directly connected with the third conductor, one end of the third conductor is connected to a feed port, the first conductor and the second conductor jointly form a first working frequency, the third conductor forms a second working frequency, and the first working frequency and the second working frequency are combined to generate the ultra-wideband antenna.

Preferably, the first conductor and the coupling portion are not directly connected, and the first conductor and the coupling portion transmit signals by electromagnetic coupling.

Preferably, the dielectric plate is made of ceramic or other insulating dielectric materials.

Preferably, the length of the third conductor is approximately a quarter wavelength of the second operating frequency, and the total length of the first conductor and the second conductor is approximately a quarter wavelength of the first operating frequency.

Preferably, the first and second conductors produce a first operating frequency that is less than a second operating frequency produced by the third conductor.

Preferably, the coupling portion excites the first operating frequency by means of electromagnetic coupling.

Compared with the related art, the ultra-wideband UWB antenna provided by the invention has the following beneficial effects:

1. the dielectric plate of the patch antenna adopts the high dielectric constant material, so that the antenna is miniaturized, is convenient to integrate into wireless equipment, is convenient for designers to integrate with wireless equipment modules, and is miniaturized while having high performance.

2. The miniaturized design of the present invention also saves space for wireless device manufacturers, providing an antenna solution for miniaturization of the devices. And meanwhile, the cost is saved.

3. The ultra-wideband antenna performance of the present invention provides a highly integrated antenna solution for the commercialization of ultra-wideband (UWB) technology.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a first partial schematic view of the present invention;

FIG. 3 is a second partial schematic view of the present invention;

FIG. 4 is a first diagram illustrating a partial structure of a PCB according to the present invention;

FIG. 5 is a second schematic diagram of the PCB board structure of the present invention;

FIG. 6 is a diagram illustrating echo loss according to the present invention.

In the figure: 1. a PCB board; 2. a patch antenna; 3. a dielectric plate; 4. a first conductor; 5. a second conductor; 6. a third conductor; 7. a coupling portion.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

referring to fig. 1-6, the present invention provides a technical solution: the utility model provides an ultra wide band UWB antenna, includes PCB board 1, and PCB board 1 is gone up on the surface and is pasted SMD antenna 2, installs a SMD antenna 2 through SMT (surface mounting technology) mode on PCB board 1, and PCB board 1 is common circuit board among the wireless device. The patch type antenna 2 comprises a dielectric plate 3, the dielectric plate 3 is made of ceramic or other insulating dielectric materials, a first conductor 4 and a coupling part 7 are arranged on the upper surface of the dielectric plate 3, a second conductor 5 and a third conductor 6 are arranged on the surface of the PCB 1, the first conductor 4 is connected with the second conductor 5, the tail end of the second conductor 5 is connected to a reference ground plane of the PCB 1, the coupling part 7 is directly connected with the third conductor 6, and one end of the third conductor 6 is connected to a feed port.

In the embodiment, the dielectric constant of the dielectric plate 3 is usually greater than 5, and the dielectric plate 3 with high dielectric constant is adopted, so that the volume of the antenna is greatly reduced, and the miniaturization of the antenna is more beneficial to being integrated into equipment; and at the same time, the electromagnetic wave is coupled from the coupling part 7 to the first conductor 4, and resonance is more easily excited.

The first conductor 4 and the second conductor 5 jointly form a first working frequency, the third conductor 6 forms a second working frequency, the length of the third conductor 6 is about a quarter wavelength of the second working frequency, the total length of the first conductor 4 and the second conductor 5 is about a quarter wavelength of the first working frequency, the first working frequency generated by the first conductor 4 and the second conductor 5 is smaller than the second working frequency generated by the third conductor 6, the first working frequency and the second working frequency are combined to generate an ultra-wideband antenna, the first conductor 4 is not directly connected with the coupling part 7, the first conductor 4 and the coupling part 7 transmit signals through electromagnetic coupling, and the coupling part 7 excites the first working frequency through electromagnetic coupling.

In this embodiment, S11 obtained in the first example of the present invention is shown in fig. 6 below: it can be seen from the following figure that the antenna of the present invention has a wide operating bandwidth, and the frequency can cover 5-10.3 GHz.

Example two:

referring to fig. 5, on the basis of the first embodiment, the present invention provides a technical solution: the first conductor 4 may be of other shapes, as shown in fig. 5 below for another embodiment of the shape of the first conductor 4.

The working principle is as follows: the length of the third conductor 6 is approximately a quarter wavelength of the second operating frequency and the total length of the first conductor 4 and the second conductor 5 is approximately a quarter wavelength of the first operating frequency. Wherein the first operating frequency generated by the first conductor 4 and the second conductor 5 is smaller than the second operating frequency generated by the third conductor 6. The third conductor 6 also comprises a coupling part 7 which is positioned on the patch antenna 2 and supplies energy to the second conductor 5 and the third conductor 6 in an electromagnetic coupling mode so as to enable the second conductor and the third conductor to resonate at the first working frequency. The coupling portion 7 and the first conductor 4 are integrated in the dielectric plate 3, the dielectric constant of the dielectric plate 3 is usually greater than 5, and two functions are performed:

1) the size of the antenna is reduced, and the miniaturization of the antenna is more beneficial to being integrated into equipment.

2) The electromagnetic wave is favorably coupled from the coupling portion 7 to the first conductor 4, and resonance is more easily excited.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An ultra-wideband UWB antenna comprising a PCB board (1), characterized in that: the surface of the PCB (1) is pasted with a patch type antenna (2);

the patch type antenna (2) comprises a dielectric plate (3), wherein a first conductor (4) and a coupling part (7) are arranged on the upper surface of the dielectric plate (3), a second conductor (5) and a third conductor (6) are arranged on the surface of the PCB (1), the first conductor (4) is connected with the second conductor (5), the tail end of the second conductor (5) is connected to a reference ground plane of the PCB (1), the coupling part (7) is directly connected with the third conductor (6), one end of the third conductor (6) is connected to a feed port, the first conductor (4) and the second conductor (5) jointly form a first working frequency, the third conductor (6) forms a second working frequency, and the first working frequency and the second working frequency are combined to form an ultra-wideband antenna.

2. The ultra-wideband UWB antenna of claim 1 wherein: the first conductor (4) and the coupling part (7) are not directly connected, and the first conductor (4) and the coupling part (7) transmit signals through electromagnetic coupling.

3. The ultra-wideband UWB antenna of claim 1 wherein: the dielectric plate (3) is made of ceramic or other insulating dielectric materials.

4. An ultra-wideband UWB antenna according to claim 1 and comprising: the third conductor (6) has a length of about a quarter wavelength of the second operating frequency and the first conductor (4) and the second conductor (5) have a total length of about a quarter wavelength of the first operating frequency.

5. An ultra-wideband UWB antenna according to claim 1 and comprising: the first conductor (4) and the second conductor (5) generate a first operating frequency which is lower than a second operating frequency generated by the third conductor (6).

6. The ultra-wideband UWB antenna of claim 1 wherein: the coupling section (7) is excited to a first operating frequency by means of electromagnetic coupling.