A tri-band antenna and communication device

Abstract

The utility model relates to communication equipment field, proposes a kind of three-in-one antenna and communication equipment, comprising: main feed point and metal back cover grounding point, metal back cover grounding point is connected with metal back cover and grounded, setting in the first direction of main feed point;First radiating body setting in the strip-shaped extension antenna of the first direction of main feed point;Second radiating body is set between the coupling groove of main feed point and metal back cover grounding point. By integrating the antenna of three functions together, the space occupation of antenna in electronic equipment is significantly reduced, which is beneficial to miniaturization and light and thin design. Compared with separately arranging three antennas, the three-in-one antenna reduces the number of antennas and related connecting components, reduces material cost and manufacturing process complexity, thereby reducing the cost of the entire device. It can effectively reduce the mutual interference between different frequency band antennas, improve the communication performance of each frequency band, such as improving the signal reception sensitivity and transmission power.

Description

Technical Field

[0001] This utility model relates to the field of communication equipment technology, and in particular to a three-in-one antenna and communication equipment. Background Technology

[0002] An antenna is a device used to receive signals. With the rapid development of wireless communication technology, electronic devices need to support multiple communication frequency bands and functions, such as mobile communication, wireless local area networks (WiFi), and global positioning systems (GPS). Most new communication devices are now concealed within their casings; these antennas are primarily located inside the device, invisible from the outside. The current traditional approach is to use a separate antenna for each function. This not only occupies a significant amount of space, increasing the design complexity and cost of the device, but also risks mutual interference between different antennas, affecting communication quality. Therefore, developing a three-in-one antenna that integrates multiple functions to solve the problems of space occupation, cost, and interference is of significant practical importance. Utility Model Content

[0003] The purpose of this invention is to provide a three-in-one antenna and communication device that can solve the technical problems of large antenna space occupation, high cost and large interference in the prior art.

[0004] The objective of this utility model is achieved through the following technical solution.

[0005] On the one hand, this utility model proposes a three-in-one antenna, comprising:

[0006] The main feed point is defined by having a first direction and a second direction opposite to the first direction.

[0007] The metal back cover grounding point is connected to and grounded by the metal back cover, and is located in the first direction of the main feed point;

[0008] The first radiator is a strip-shaped extension antenna disposed in the first direction of the main feed point;

[0009] The second radiator is disposed in the coupling slot between the main feed point and the metal back cover grounding point.

[0010] On the other hand, this utility model also proposes a communication device, including a metal back cover and a three-in-one antenna as described above.

[0011] The antenna and communication device proposed in this invention integrate three functions into one, significantly reducing the space occupied by the antenna in electronic devices and facilitating miniaturization and thinner design. Compared to setting three antennas separately, this three-in-one antenna reduces the number of antennas and related connecting components, lowering material costs and manufacturing complexity, thereby reducing the overall cost of the device. Through the rational design of the radiator, feed network, and ground plane, it effectively reduces mutual interference between antennas of different frequency bands, improves the communication performance of each frequency band, and enhances signal reception sensitivity and transmission power. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of an embodiment of a three-in-one antenna according to the present invention;

[0013] Figure 2 This is a standing wave return loss impedance diagram of an embodiment of a three-in-one antenna of this utility model;

[0014] Figure 3 This is a dimensional schematic diagram of an embodiment of a three-in-one antenna of this utility model.

[0015] 11. Main feed point; 12. Metal back cover grounding point; 13. First radiator; 14. Second radiator. Detailed Implementation

[0016] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described clearly and completely below with reference to the accompanying drawings. Obviously, the specific details described below are only a part of the embodiments of this utility model, and this utility model can be implemented in many other embodiments different from those described herein. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0018] Unless otherwise defined, all 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 pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0019] See attached document Figure 1 , Figure 2 and Figure 3 As shown, this utility model proposes a three-in-one antenna, with the antenna being an inverted F-shaped PIFA antenna. The three-in-one antenna covers the frequency ranges of 1575.5 MHz, 2400 to 2483.5 MHz, and 5120 to 5820 MHz, and includes:

[0020] The master feed point 11 is defined by having a first direction and a second direction opposite to the first direction.

[0021] The metal back cover grounding point 12 is connected to the metal back cover and grounded, and is located in the first direction of the main feed point 11;

[0022] Understandably, the metal back cover and FPC grounding pin are the main radiators of the antenna. To improve the radiation efficiency of the antenna itself, the metal back cover, which forms the reference ground, and the antenna FPC are designed as an integrated unit.

[0023] The first radiator 13 is a strip-shaped extension antenna located in the first direction of the main feed point 11; the first radiator 13 is a GPS radiator.

[0024] The second radiator 14 is a coupling slot located between the main feed point 11 and the metal back cover grounding point 12; the second radiator 14 controls the bandwidth of intermediate frequency, high frequency and ultra-high frequency; in addition, the second radiator 14 is also used to control the length of the ultra-high frequency 5G frequency.

[0025] It is understandable that the coupling slot between the power supply and ground of the second radiator 14 is located at a position that controls the bandwidth and frequency of intermediate frequency, high frequency, and ultra-high frequency. By designing the size and width of this slot, the bandwidth of intermediate frequency, high frequency, and ultra-high frequency can be affected, and the length of the ultra-high frequency 5G (5120-5820MHz) frequency can also be controlled.

[0026] The antenna and communication device proposed in this invention integrate three functions into one, significantly reducing the space occupied by the antenna in electronic devices and facilitating miniaturization and thinner design. Compared to setting three antennas separately, this three-in-one antenna reduces the number of antennas and related connecting components, lowering material costs and manufacturing complexity, thereby reducing the overall cost of the device. Through the rational design of the radiator, feed network, and ground plane, it effectively reduces mutual interference between antennas of different frequency bands, improves the communication performance of each frequency band, and enhances signal reception sensitivity and transmission power.

[0027] On the other hand, this utility model also proposes a communication device, including a metal back cover and the above-mentioned three-in-one antenna.

[0028] This three-in-one antenna structure includes a radiator, a feed network, and a ground plane. The radiator consists of three mutually coupled radiating elements, corresponding to the mobile communication, WiFi, and GPS frequency bands, respectively. The radiating elements employ a special shape design, such as a zigzag or polygonal structure, to increase the radiation length and improve radiation efficiency within a limited space.

[0029] It is understood that this radiation system employs a printed circuit board (PCB) process to print the pattern of the radiator on a dielectric substrate. The dielectric substrate is selected from materials with suitable dielectric constants and loss tangents, such as FR-4. For the mobile communication band radiating units, they are printed according to the designed zigzag structure dimensions; the WiFi and GPS band radiating units are also printed according to their corresponding design shapes.

[0030] In this embodiment, the feed network connects the radiator and the external circuitry, providing suitable excitation signals to the three radiating elements. The feed network employs a microstrip line or coplanar waveguide structure, and through a well-designed impedance matching network, ensures good impedance matching for each radiating element within its respective operating frequency band, reducing reflection loss. For example, for radiating elements operating in mobile communication bands, the input impedance is adjusted to approximate the 50Ω standard impedance by adjusting the width and length of the microstrip line.

[0031] Understandably, the power supply network is also fabricated using PCB technology, on a separate dielectric substrate. Based on the impedance matching network design, microstrip lines or coplanar waveguides are printed, and discrete components such as matching capacitors and inductors are mounted. High-precision photolithography and etching processes ensure the width and length accuracy of the microstrip lines to achieve good impedance matching.

[0032] In this embodiment, the grounding plane is further located below the radiator, maintaining a certain distance from it. The shape and size of the grounding plane have a significant impact on the antenna performance. By optimizing the shape of the grounding plane, such as by using slots or holes, high-order harmonics can be suppressed, mutual coupling between different frequency bands can be reduced, and the antenna isolation can be improved.

[0033] Specifically, in this embodiment, the ground plane is fabricated as follows: a ground plane is formed on a dielectric substrate below the radiator. The ground plane is then machined using an etching process according to the designed slot or hole shape and size. After machining, the radiator, the power supply network, and the ground plane are assembled to ensure good electrical connections between all components.

[0034] Finally, the fabricated three-in-one antenna is connected to a test device, such as a vector network analyzer, to test its performance parameters, including impedance matching, radiation pattern, gain, and isolation, in the mobile communication, WiFi, and GPS bands. Based on the test results, the antenna's structural parameters are fine-tuned, such as adjusting the length of the radiating elements, the position of the main feed point 11, or the slot size of the ground plane, until the antenna performance meets the design requirements.

[0035] Metal back cover, three-in-one antenna.

[0036] This antenna is an inverted-F PIFA antenna. Through slotting, it couples WIFI-2.4 / 5.8G, and the longest part is the effective resonant voltage standing wave ratio of GPS-1575.5MHz, thereby meeting the requirements of extending the mid-high frequency and ultra-high frequency bandwidth.

[0037] The antenna's grounding pin is formed by the user number FPC and metal back cover to improve radiation efficiency.

[0038] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications, substitutions, and improvements without departing from the concept of this utility model, and these should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the claims.

Claims

1. A three-in-one antenna, characterized in that, include: The main feed point is defined by having a first direction and a second direction opposite to the first direction. The metal back cover grounding point is connected to and grounded by the metal back cover, and is located in the first direction of the main feed point; The first radiator is a strip-shaped extension antenna disposed in the first direction of the main feed point; The second radiator is disposed in the coupling slot between the main feed point and the metal back cover grounding point.

2. The three-in-one antenna according to claim 1, characterized in that: The first radiator is a GPS radiator.

3. The three-in-one antenna according to claim 1, characterized in that: The second radiator controls the bandwidth of intermediate frequency, high frequency, and ultra-high frequency.

4. The three-in-one antenna according to claim 1, characterized in that: The aforementioned three-in-one antenna is an inverted F-shaped PIFA antenna.

5. The three-in-one antenna according to claim 1, characterized in that: The second radiator is also used to control the length of the ultra-high frequency 5G frequency.

6. The three-in-one antenna according to claim 1, characterized in that: The three-in-one antenna covers a frequency range of 1575.5, 2400 to 2483.5, and 5120 to 5820 MHz.

7. A communication device, characterized in that, Includes a metal back cover and a three-in-one antenna as described in any one of claims 1 to 6.

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