CN211605403U - Double-frequency printed monopole antenna with resonant branches and suitable for 5G communication - Google Patents

Abstract

The utility model discloses a be suitable for double-frenquency printing monopole antenna that has resonance minor matters of 5G communication, include: the antenna comprises a dielectric substrate, a rectangular metal radiation patch and two resonance branches; wherein the lengths of the two resonance branches are different; the metal radiating patch part is printed on the dielectric substrate attached with a metal ground plane; and the two resonance branches are connected with the metal radiation patch. The utility model provides a be suitable for double-frenquency printing monopole antenna that has resonance stub of 5G communication has frequency bandwidth, dual-band, characteristics such as the directionality is good, small, gain height, with low costs, has better application and reference value in 5G communication equipment.

Description

A dual-frequency printed monopole antenna with resonant branches for 5G communication

technical field

The utility model relates to the technical field of antennas, in particular to a dual-frequency printed monopole antenna with resonant branches suitable for 5G communication.

Background technique

With the development of information technology, communication technology has been updated from the original analog cellular system in the 1980s to the mature 4G era, and then to the vigorous fifth-generation mobile communication technology (5G). Our widely used 4G era integrates network standards and WLAN network standards, transmits various information through digital communication technology, and speeds up the transmission rate (above 20Mbps), which makes mobile phones no longer only used for calls, but become a Portable computer. With the rapid development of the Internet of Things, the Internet of Vehicles, smart homes, and smart wear, the transmission rate of 4G can no longer meet some of the needs. In this context, 5G communication is about to emerge. In theory, it can reach several 10Gb per second, which can realize the interconnection of all things, and the large-scale antenna array (MIMO) technology is one of the key technologies for 5G to achieve high speed and low latency.

As the frontier part of 5G communication terminal, the research and design of mobile terminal antenna play a crucial role in the development of 5G mobile communication. , low price, easy implementation and other trends, so the mobile terminal antenna for 5G communication has also put forward higher design requirements. Today, in order to expand spectrum resources, 5G will develop and use new frequency bands, the C-band of 3.5-4.5GHz and the new frequency band of 26-39GHz millimeter wave. These two frequency bands have important use value. The Ministry of Industry and Information Technology of my country has released the frequencies used by the 5G communication system in the medium and low frequency bands, which are 3300-3400MHz, 3400-3600MHz and 4800-5000MHz. China Mobile has also allocated 5G test frequencies, which are 2515MHz-2675MHz and 4800MHz-4900MHz. Because each mobile communication system has its corresponding communication standard and corresponding working frequency band, it is necessary to design an antenna corresponding to its working frequency. Therefore, the design technology of antennas that can meet the requirements of dual-frequency (multi-frequency) is now a research hotspot of antennas.

At present, there are various implementation methods of dual-frequency antennas. Most of the dual-frequency antennas are mainly radiating patch antennas, but their feeding structures are extremely complex.

Therefore, how to provide a dual-band antenna suitable for 5G with a simple structure is an urgent problem to be solved by those skilled in the art.

Utility model content

In view of this, the present invention provides a dual-frequency printed monopole antenna with resonant branches suitable for 5G communication, which has the characteristics of wide frequency band, dual frequency bands, good directivity, small size, high gain, and low cost. 5G communication equipment has good application and reference value.

In order to achieve the above purpose, the utility model adopts the following technical solutions:

A dual-frequency printed monopole antenna with resonant stubs suitable for 5G communication, comprising: a dielectric substrate, a rectangular metal radiation patch and two resonant stubs; wherein the two resonant stubs have different lengths;

The metal radiation patch is partially printed on the dielectric substrate with the metal ground plane;

Two of the resonant branches are connected to the metal radiating patch.

Preferably, a part of the metal radiation patch is located in the free space, and the other part is located on the dielectric substrate.

Preferably, the length of the metal radiation patch is 1/4 of the wavelength of the received and emitted electromagnetic waves.

Preferably, both of the resonant branches are L-shaped.

It can be seen from the above technical solutions that, compared with the prior art, the present disclosure provides a dual-frequency printed monopole antenna with resonant branches suitable for 5G communication. Two resonant branches are added next to the monopole to form Two resonance units corresponding to different frequencies are used to realize the "clamp"-shaped dual-frequency printed monopole antenna. The overall structure is simple, the weight is light, and it has a wide frequency band, dual frequency bands, good directivity, small size, easy integration and high gain. , easy to implement, low cost and other characteristics, solve the shortcomings of the complex dual-frequency antenna feed structure in the prior art, ensure the separation and matching of the receiving and transmitting channels, and have good application and reference value in 5G communication equipment.

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description It is only an embodiment of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without creative efforts.

Fig. 1 is the top view of the dual-frequency printed monopole antenna with resonance branch provided by the utility model;

FIG. 2 is a side view of the dual-frequency printed monopole antenna with resonant branches provided by the present invention.

Among them, 1, dielectric substrate, 2, metal radiation patch, 3, resonance branch.

Detailed ways

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

Referring to Figures 1 and 2, an embodiment of the present utility model discloses a dual-frequency printed monopole antenna with resonant stubs suitable for 5G communication, comprising: a dielectric substrate 1, a rectangular metal radiation patch 2, and two Resonance branch 3; wherein, the lengths of the two resonance branches 3 are different, and each resonance branch 3 corresponds to a resonance frequency;

The metal radiation patch 2 is partially printed on the dielectric substrate 1 with a metal ground plane;

The two resonant branches 3 are connected to the metal radiating patch 2 .

In order to further optimize the above technical solution, a part of the metal radiation patch 2 is located in the free space, and the other part is located on the dielectric substrate 1 .

In order to further optimize the above technical solution, the length of the metal radiation patch 2 is 1/4 of the wavelength of the received and emitted electromagnetic waves.

The printed monopole antenna is to replace the thin straight cylindrical metal radiator of 1/4 wavelength of the traditional monopole antenna with an elongated rectangular radiation patch of equal length, and print the elongated rectangular radiation patch on the bottom with attached On the dielectric substrate of the metal ground plane, the antenna fed by the microstrip line is used. The dual-frequency printed monopole antenna of the microstrip structure realizes the dual-frequency antenna by changing the shape of the radiation patch of the traditional printed monopole antenna and adding metal resonant branches on the microstrip line patch through meandering technology. Each branch corresponds to a resonant frequency, and by adjusting the length of the branch, the antenna can work in a desired operating frequency band. The antenna structure is shown in Figure 1 and Figure 2.

The "L"-shaped radiation patch on the left corresponds to a high-frequency monopole with a resonance frequency of 4.9GHz, and the inverted "L"-shaped radiation patch on the right corresponds to a low-frequency monopole with a resonance frequency of 3.45GHz. The value of the length L _h (L _h =W ₂ -W _s +L ₂ ) of the high frequency monopole whose resonant frequency is 4.9GHz is between 7.3mm and 15.3mm, and the low frequency monopole whose resonant frequency is 3.45GHz The value of the length L _l (L _l =W ₃ -W ₁ +W _s +L ₃ ) of the sub is between 10.4mm and 21.7mm. In theory, the resonant branches in this range can realize dual-frequency reception of the corresponding frequency. , but the effect of the frequency received by the resonant stubs of different sizes is different, and the size of the resonant stubs can be designed according to the needs of the frequency. For 5G communication, several practical parameters have been optimized and determined, see Tables 1, 2 and Figure 1.

The specific design method of the dual-frequency printed monopole antenna is: generally, the length of the monopole antenna is 1/4 of the wavelength of the electromagnetic wave it receives and transmits. Therefore, when designing the dual-frequency printed monopole antenna, it is necessary to The length of the two resonant branches of the printed monopole antenna is calculated from the resonant frequency, and it is added to the radiation patch of the traditional printed monopole antenna, so that the antenna can work in dual frequency bands. If the working frequency is not suitable , the length of the resonant branch can be optimized to make the antenna work in the ideal frequency band. For the printed monopole antenna with microstrip structure, a part of the metal radiating patch is located in the free space, and the other part is located in the dielectric substrate, so the electromagnetic wave is transmitted in the free space and the dielectric substrate at the same time, so its wavelength should be between Between its wavelength when propagating in free space and its wavelength when propagating in a medium.

The technical solutions provided by the present utility model are further described below in conjunction with specific examples.

specific example one

Example 1 A "clamp"-shaped dual-frequency printed monopole antenna based on the mid-low frequency 5G communication frequency promulgated by the Ministry of Industry and Information Technology of China is designed. The volume of this antenna is 30mm × 25mm × 1.6mm. For other details, please refer to the appendix. Figure 1 and Table 1. The low-frequency working frequency band of the antenna is 3.18-3.71GHz, the absolute bandwidth is 530MHz, the high-frequency working frequency band is 4.31-11.21GHz, and the absolute bandwidth is 6.9GHz, which can completely cover my country's medium and low-frequency 5G communication frequencies and can be well applied in China 5G personal communication equipment, and provides a better reference model for the design of 5G multi-band antennas.

Specific example two

Example 2 A "clamp"-shaped dual-band printed monopole antenna based on China Mobile's 5G test frequency band was designed. The volume of this antenna is 35mm × 30mm × 1.6mm. Table 2. The low-frequency working frequency band of the antenna is 2.49-2.73GHz, the absolute bandwidth is 240MHz, the high-frequency working frequency band is 3.98-6.62GHz, and the absolute bandwidth is 2.64GHz, which can completely cover the 5G test frequency band of China Mobile, and can be well used for matching In the personal mobile communication equipment of China Mobile's 5G test frequency, it provides a good reference model for the design of China Mobile's 5G multi-band antenna.

Table 1 Example 1 Details Dimensions

parameter length/mm parameter length/mm W₁ 3 L₁ 14 W₂ 3.5 L₂ 7.5 W₃ 9 L₃ 9.5 W_s 2 L_u 11 W 25 L 35 H 1.6

Table 2 Example 2 Details Dimensions

parameter length/mm parameter length/mm W₁ 3 L₁ 13 W₂ 4 L₂ 9.5 W₃ 11 L₃ 15.5 W_s 1.8 L_u 11 W 30 L 35 H 1.6

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other. As for the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant part can be referred to the description of the method.

The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (4)

1. A dual-frequency printed monopole antenna with resonant stubs suitable for 5G communication, comprising: the antenna comprises a dielectric substrate (1), a rectangular metal radiation patch (2) and two resonance branches (3); wherein the two resonant branches (3) have different lengths;

the metal radiating patch (2) is partially printed on the dielectric substrate (1) attached with a metal ground plane;

the two resonance branches (3) are connected with the metal radiation patch (2).

2. The dual-frequency printed monopole antenna with resonance stub for 5G communication according to claim 1 is characterized in that the metal radiating patch (2) is partially located in free space and partially located on the dielectric substrate (1).

3. The dual-frequency printed monopole antenna with resonant stubs applicable to 5G communication according to claim 1 or 2, characterized in that the length of the metallic radiating patch (2) is 1/4 of the wavelength of the received and transmitted electromagnetic wave.

4. The dual-frequency printed monopole antenna with resonant stubs applicable to 5G communication according to claim 1 or 2, characterized in that both resonant stubs (3) are L-shaped.

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