An Ultra-Wideband (UWB) antenna

Abstract

The present invention discloses an ultra-wideband (UWB) antenna, which relates to the technical field of antennas. The ultra-wideband (UWB) antenna includes a printed circuit board (PCB). A patch antenna is surface-mounted on the surface of the PCB. The patch antenna includes a dielectric substrate. A first conductor and a coupling portion are disposed on the upper surface of the dielectric substrate. A second conductor and a third conductor are disposed on the surface of the PCB. The first conductor is connected to the second conductor, and the end of the second conductor is connected to the reference ground plane of the PCB. The coupling portion is directly connected to the third conductor. In the patch antenna of the present invention, the dielectric substrate of the patch antenna uses a high dielectric constant material to miniaturize the antenna, which is convenient for integration into wireless devices, facilitating integration by designers and wireless device modules. While miniaturizing, high performance is also achieved, saving space for wireless device manufacturers, providing an antenna solution for the miniaturization of devices, and also saving costs, providing a highly integrated antenna solution for the commercialization of ultra-wideband (UWB) technology.

Description

Technical Field

[0001] The present invention relates to the field of antenna technology, and in particular to an ultra-wideband (UWB) antenna. Background Art

[0002] UWB (Ultra Wide Band) technology is a new type of wireless communication technology. Its unique technology combined with ultra-wideband frequency bandwidth can provide centimeter-level positioning services. In recent years, UWB positioning technology has been applied to keyless entry systems for cars, and mobile phone manufacturers have also adopted UWB technology to implement positioning services between products. Antennas are an indispensable element in wireless communications, affecting positioning accuracy and communication distance. Designing a high-performance UWB antenna is particularly important.

[0003] With the rapid development of communication electronic products, the product size is getting smaller while the functions are increasing. For example, the mobile phone has more and more functions while the size is decreasing. This has led to the need to design antennas that are small and high-performance at the same time, which has become a major problem in the industry. The existing UWB antenna uses traditional antenna technology, which makes it large and not conducive to integration into products. Therefore, we propose a miniaturized ultra-wideband UWB antenna that can also take into account high performance to solve the problems raised in the above background technology. Summary of the invention

[0004] 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 achieving high performance.

[0005] To achieve the above object, the present invention provides the following technical solution: an ultra-wideband (UWB) antenna, comprising a PCB board, on the surface of which a patch antenna is mounted.

[0006] The patch antenna includes a dielectric plate, a first conductor and a coupling portion are provided on the upper surface of the dielectric plate, a second conductor and a third conductor are provided on the surface of the PCB board, 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, the coupling portion 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 together form a first operating frequency, the third conductor forms a second operating frequency, and the first operating frequency and the second operating frequency are combined to generate an ultra-wideband antenna.

[0007] 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.

[0008] Preferably, the dielectric plate is made of ceramic or other insulating dielectric materials.

[0009] Preferably, the length of the third conductor is about one - quarter wavelength of the second operating frequency, and the total length of the first conductor and the second conductor is about one - quarter wavelength of the first operating frequency.

[0010] Preferably, the first operating frequency generated by the first conductor and the second conductor is less than the second operating frequency generated by the third conductor.

[0011] Preferably, the coupling part excites the first operating frequency by means of electromagnetic coupling.

[0012] Compared with the related art, an ultra - wideband UWB antenna provided by the present invention has the following beneficial effects:

[0013] 1. The dielectric plate of the patch antenna of the present invention uses a high - dielectric - constant material, which miniaturizes the antenna, making it convenient to be integrated into wireless devices, facilitating the integration by designers and wireless device modules, and achieving both miniaturization and high performance.

[0014] 2. The miniaturized design of the present invention also saves space for wireless device manufacturers, providing an antenna solution for the miniaturization of devices. At the same time, it also saves costs.

[0015] 3. The ultra - wideband antenna performance of the present invention provides a highly integrated antenna solution for the commercialization of ultra - wideband (UWB) technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present invention;

[0017] Figure 2 is a partial front - view structural schematic Figure 1 ;

[0018] Figure 3 is a partial front - view structural schematic Figure 2 ;

[0019] Figure 4 is a partial structural schematic of the PCB board of the present invention Figure 1 ;

[0020] Figure 5 is a partial structural schematic of the PCB board of the present invention Figure 2 ;

[0021] Figure 6 is a schematic diagram of the return loss of the present invention.

[0022] In the figure: 1. PCB board; 2. Patch antenna; 3. Dielectric plate; 4. First conductor; 5. Second conductor; 6. Third conductor; 7. Coupling part. DETAILED DESCRIPTION OF THE INVENTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0024] Embodiment 1:

[0025] Please refer to Figures 1-6 , the present invention provides a technical solution: an ultra-wideband UWB antenna, including a PCB board 1, on the surface of the PCB board 1, a patch antenna 2 is surface-mounted. On the PCB board 1, a patch antenna 2 is installed by SMT (Surface Mount Technology). 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. On the upper surface of the dielectric board 3, a first conductor 4 and a coupling part 7 are provided. On the surface of the PCB board 1, a second conductor 5 and a third conductor 6 are provided. 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 to the third conductor 6. One end of the third conductor 6 is connected to the feed port.

[0026] In this embodiment, the dielectric constant of the dielectric board 3 is usually greater than 5. Due to the use of the dielectric board 3 with a high dielectric constant, the volume of the antenna is greatly reduced. The miniaturization of the antenna is more conducive to integration into the device. At the same time, it is beneficial for electromagnetic waves to be coupled from the coupling part 7 to the first conductor 4, and it is easier to excite resonance.

[0027] The first conductor 4 and the second conductor 5 jointly form a first operating frequency, and the third conductor 6 forms a second operating frequency. The length of the third conductor 6 is about one-quarter wavelength of the second operating frequency. The total length of the first conductor 4 and the second conductor 5 is about one-quarter wavelength of the first operating frequency. The first operating frequency generated by the first conductor 4 and the second conductor 5 is less than the second operating frequency generated by the third conductor 6. The combination of the first operating frequency and the second operating frequency generates 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. The coupling part 7 excites the first operating frequency through electromagnetic coupling.

[0028] In this embodiment, the S11 obtained in the first embodiment of the present invention is as follows Figure 6 : It can be seen from the following figure that the antenna of the present invention has a very wide operating bandwidth, and the frequency can cover 5 - 10.3 GHz.

[0029] Embodiment 2:

[0030] Please refer to Figure 5As shown, based on the first embodiment, the present invention provides a technical solution: The first conductor 4 can be of other shapes, as follows Figure 5 This is another embodiment of the shape of the first conductor 4.

[0031] Working principle: The length of the third conductor 6 is approximately one-quarter of the wavelength of the second operating frequency, and the total length of the first conductor 4 and the second conductor 5 is approximately one-quarter of the wavelength of the first operating frequency. The first operating frequency generated by the first conductor 4 and the second conductor 5 is less than the second operating frequency generated by the third conductor 6. The third conductor 6 also includes a coupling portion 7 located on the patch antenna 2, which provides energy to the second conductor 5 and the third conductor 6 through electromagnetic coupling, causing them to resonate at the first operating frequency. Both the coupling portion 7 and the first conductor 4 are integrated on the dielectric plate 3, and the dielectric constant of this dielectric plate 3 is usually greater than 5. It has two functions:

[0032] 1) It reduces the volume of the antenna, making the antenna miniaturized and more conducive to integration into the device.

[0033] 2) It is beneficial for electromagnetic waves to be coupled from the coupling portion 7 to the first conductor 4, making it easier to excite resonance.

[0034] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ultra-wideband UWB antenna, comprising a PCB board (1), characterized in that: a patch antenna (2) is surface-mounted on the surface of the PCB board (1); the patch antenna (2) comprises a dielectric board (3), a first conductor (4) and a coupling part (7) are arranged on the upper surface of the dielectric board (3), a second conductor (5) and a third conductor (6) are arranged on the surface of the PCB board (1), the first conductor (4) is connected to the second conductor (5), 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 to 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 operating frequency, the third conductor (6) forms a second operating frequency, and the first operating frequency and the second operating frequency are combined to generate an ultra-wideband antenna; 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.

2. The ultra-wideband UWB antenna according to claim 1, characterized in that: the dielectric board (3) is made of ceramic or other insulating dielectric materials.

3. The ultra-wideband UWB antenna according to claim 1, characterized in that: the length of the third conductor (6) is one-quarter wavelength of the second operating frequency, and the total length of the first conductor (4) and the second conductor (5) is one-quarter wavelength of the first operating frequency.

4. The ultra-wideband UWB antenna according to claim 1, characterized in that: the first operating frequency generated by the first conductor (4) and the second conductor (5) is less than the second operating frequency generated by the third conductor (6).

5. The ultra-wideband UWB antenna according to claim 1, characterized in that: the coupling part (7) excites the first operating frequency by means of electromagnetic coupling.

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