CN114976650A - An ultra-wideband UWB antenna - Google Patents

Abstract

The invention discloses an ultra-wideband UWB antenna, which relates to the technical field of antennas. The ultra-wideband UWB antenna includes a PCB board, the surface of the PCB board is affixed with a patch antenna, the patch antenna includes a dielectric board, and the upper surface of the dielectric board is provided with a first conductor and a coupling part , the surface of the PCB board is provided with a second conductor and a third conductor, the first conductor and the second conductor are connected, and the end of the second conductor is connected to the reference ground plane of the PCB board, and the coupling part is connected to The third conductor is directly connected. The dielectric plate of the patch antenna of the invention adopts high dielectric constant materials to make the antenna miniaturized, which is convenient for integration into wireless equipment, and facilitates the integration of designers and wireless equipment modules. The miniaturization of the device provides an antenna solution while also saving costs, providing a highly integrated antenna solution for the commercialization of ultra-wideband (UWB) technology.

Description

An ultra-wideband UWB antenna

technical field

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

Background technique

UWB (Ultra Wide Band) ultra-wideband technology is a new type of wireless communication technology, because its unique technology combined with the frequency bandwidth of ultra-wideband can provide centimeter-level positioning services. In recent years, UWB positioning technology has been applied to the keyless entry system of automobiles, and mobile phone manufacturers have also adopted UWB technology to realize positioning services between products. As an indispensable element in wireless communication, the antenna affects the positioning accuracy and communication distance. It is particularly important to design a high-performance UWB antenna.

With the rapid development of communication electronic products, the product size is getting smaller and the function is more and more. For example, the mobile phone has more and more functions when the size is reduced. Design has become a major problem in the industry. However, the existing UWB antenna adopts traditional antenna technology, which leads to its large size and is not conducive to integration into products. Therefore, we propose a miniaturized and high-performance ultra-wideband UWB antenna to solve the problem proposed in the above background technology. The problem.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an ultra-wideband UWB antenna, which solves the technical problem that the antenna cannot be miniaturized while taking into account high performance.

In order to achieve the above object, the present invention provides the following technical solutions: an ultra-wideband UWB antenna, comprising a PCB board, and a patch antenna is affixed on the surface of the PCB board.

The patch antenna includes a dielectric board, the upper surface of the dielectric board is provided with a first conductor and a coupling part, the surface of the PCB board is provided with a second conductor and a third conductor, the first conductor and the second conductors are connected, and the end of the second conductor is connected to the reference ground plane of the PCB board, the coupling part is directly connected to the third conductor, one end of the third conductor is connected to the feeding port, the first conductor and The second conductor collectively forms a first operating frequency, the third conductor forms a second operating frequency, and the first operating frequency and the second operating frequency combine to produce an ultra-wideband antenna.

Preferably, the first conductor and the coupling part are not directly connected, and the first conductor and the coupling part transmit signals through electromagnetic coupling.

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

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

Preferably, the first working frequency generated by the first conductor and the second conductor is lower than the second working frequency generated by the third conductor.

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

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

1. The dielectric plate of the patch antenna of the present invention adopts high dielectric constant materials, which makes the antenna miniaturized, easy to integrate into wireless equipment, and convenient for designers and wireless equipment modules to be integrated, miniaturization and high performance.

2. The miniaturized design of the present invention also saves space for wireless equipment manufacturers, and provides an antenna solution for the miniaturization of equipment. It also saves costs.

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

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the partial front view structure schematic diagram 1 of the present invention;

Fig. 3 is the partial front view structure schematic diagram two of the present invention;

FIG. 4 is a schematic diagram 1 of the partial structure of the PCB board of the present invention;

Fig. 5 is the schematic diagram 2 of the PCB board part of the present invention;

FIG. 6 is a schematic diagram of the return loss of the present invention.

In the figure: 1. PCB board; 2. Patch antenna; 3. Dielectric board; 4. First conductor; 5. Second conductor; 6. Third conductor; 7. Coupling part.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the The embodiments of the present invention, and all other embodiments obtained by those of ordinary skill in the art without creative work, fall within the protection scope of the present invention.

Example 1:

1-6, the present invention provides a technical solution: an ultra-wideband UWB antenna, comprising a PCB board 1, the surface of the PCB board 1 is affixed with a patch antenna 2, and the PCB board 1 passes SMT (surface A patch antenna 2 is installed by way of packaging technology), and the PCB board 1 is a common circuit board in wireless devices. The patch antenna 2 includes a dielectric board 3, the dielectric board 3 is made of ceramic or other insulating dielectric materials, the upper surface of the dielectric board 3 is provided with a first conductor 4 and a coupling part 7, and the surface of the PCB board 1 is provided with a second conductor 5 and The third conductor 6, the first conductor 4 and the second conductor 5 are connected, and the end of the second conductor 5 is connected to the reference ground plane of the PCB board 1, the coupling part 7 is directly connected with the third conductor 6, and one end of the third conductor 6 Connect to the feed port.

In this embodiment, the dielectric constant of the dielectric plate 3 is usually greater than 5. Since the dielectric plate 3 with a high dielectric constant is used, the volume of the antenna is greatly reduced, and the miniaturization of the antenna is more conducive to integration into the device; at the same time, it is beneficial to The electromagnetic wave is coupled to the first conductor 4 from the coupling part 7, and it is easier to excite resonance.

The first conductor 4 and the second conductor 5 together form the first working frequency, the third conductor 6 forms the second working frequency, the length of the third conductor 6 is about a quarter wavelength of the second working frequency, the first conductor 4 and The total length of 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 The frequency and the second operating frequency are combined to produce an ultra-wideband antenna, the first conductor 4 and the coupling part 7 are not directly connected, the first conductor 4 and the coupling part 7 transmit signals through electromagnetic coupling, and the coupling part 7 is excited by electromagnetic coupling. the first operating frequency.

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

Embodiment 2:

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 , which is another embodiment of the shape of the first conductor 4 .

Working principle: the length of the third conductor 6 is about a quarter wavelength of the second working frequency, and 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 third conductor 6 also includes a coupling portion 7 located on the patch antenna 2, and provides energy to the second conductor 5 and the third conductor 6 through electromagnetic coupling, so that the second conductor 5 and the third conductor 6 resonate at the first operating frequency. Both the coupling part 7 and the first conductor 4 are integrated into the dielectric plate 3, and the dielectric constant of the dielectric plate 3 is usually greater than 5, which has two functions:

1) The volume of the antenna is reduced, and the miniaturization of the antenna is more conducive to integration into the device.

2) It is favorable for the electromagnetic wave to be coupled from the coupling part 7 to the first conductor 4, and it is easier to excite the resonance.

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

Claims (6)

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.

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