CN219371378U

CN219371378U - PIFA antenna and handheld device

Info

Publication number: CN219371378U
Application number: CN202320300563.7U
Authority: CN
Inventors: 胡方奔
Original assignee: Shenzhen Sunway Communication Co Ltd
Current assignee: Shenzhen Sunway Communication Co Ltd
Priority date: 2023-02-13
Filing date: 2023-02-13
Publication date: 2023-07-18
Anticipated expiration: 2033-02-13

Abstract

The embodiment of the utility model discloses a PIFA antenna and handheld equipment, the PIFA antenna comprises: a substrate having a planar first surface; the radiator of setting in the first surface of base plate, the upper surface outward flange of the main match line of radiator is provided with feed unit and feed ground unit respectively, the radiator includes: a first radiating element; the second radiation unit is connected with one end of the first radiation unit in an extending way and is perpendicular to the extending direction of the first radiation unit; a third radiating element connected to the second radiating element; and a fourth radiating element formed by a groove formed by the connection of the microstrip line of the third radiating element and the microstrip line of the second radiating element. By means of the method, the attenuation of the handheld device to the communication performance of the antenna under the handheld condition can be reduced, and the communication performance of the antenna of the handheld device is improved.

Description

PIFA antenna and handheld device

Technical Field

The embodiment of the utility model relates to the field of antenna design, in particular to a PIFA antenna and handheld equipment.

Background

With the rapid development of internet application nowadays, various consumer electronic products are marked with WiFi functions, and mobile phone terminal products must be marked, meanwhile, with the push of various hand-tour APPs, the requirements of consumers on WiFi performance in terms of network experience are also higher and higher, therefore, the frequency band of the WiFi antenna design scheme with small game hand derating is 2400-2500MHz and 5.15-5.35GHz/5.7-5.85GHz respectively, and the thought of adjusting the game hand derating can be realized by changing the antenna wiring and adding electronic components.

Disclosure of Invention

In order to solve the technical problems, the utility model adopts a technical scheme that: there is provided a PIFA antenna for use in a handheld device, the PIFA antenna comprising: a substrate having a planar first surface; the radiator of setting in the first surface of base plate, the upper surface outward flange of the main match line of radiator is provided with feed unit and feed ground unit respectively, the radiator includes: a first radiating element; the second radiation unit is connected with one end of the first radiation unit in an extending way and is perpendicular to the extending direction of the first radiation unit; a third radiating element connected to the second radiating element; and a fourth radiating element formed by a groove formed by the connection of the microstrip line of the third radiating element and the microstrip line of the second radiating element.

In some embodiments, the substrate comprises an FPC antenna substrate or an LDS antenna substrate.

In some embodiments, the first radiating element is a wifi2.4g radiating element for controlling a resonant frequency of a wifi2.4g frequency band.

In some embodiments, the electrical length of the first radiating element is one quarter of the waveguide wavelength.

In some embodiments, the second radiating element is a wifi5.1g radiating element for controlling a resonant frequency of a wifi5.1g frequency band.

In some embodiments, the electrical length of the second radiating element is one quarter of the waveguide wavelength.

In some embodiments, the third radiating element is a GPS L1 radiating element for controlling a resonant frequency of a GPS L1 band, and the electrical length of the third radiating element is a quarter of a waveguide wavelength.

In some embodiments, the fourth radiating element is a wifi5.8g radiating element for controlling a resonant frequency of a wifi5.8g frequency band.

In order to solve the technical problems, the utility model adopts another technical scheme that: there is provided a handheld device comprising: a PIFA antenna as described above; and the PCB is arranged above the PIFA antenna, and the feed unit and the ground feed unit of the PIFA antenna are respectively connected with corresponding contacts of the PCB.

In some embodiments, the handheld device further comprises: and the matching unit is connected with the first radiating unit of the PIFA antenna and is used for carrying out impedance tuning so as to increase the resonance ring of the first radiating unit.

The embodiment of the utility model has the beneficial effects that: compared with the prior art, the embodiment of the utility model realizes the WiFi5.8G frequency band by utilizing the antenna slotting arrangement and leads the WiFi5.8G frequency band to be far away from the handheld area, and WIFI2.4G widens the line and adjusts the matching, thereby greatly reducing the attenuation of the handheld device to the communication performance of the antenna under the handheld condition and improving the communication performance of the antenna of the handheld device.

Drawings

Fig. 1 is a schematic structural diagram of a PIFA antenna in a top view according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a handheld device from a side view perspective according to an embodiment of the present utility model;

fig. 3 is a schematic diagram of another handheld device according to an embodiment of the present utility model from a side view.

Detailed Description

In order to facilitate an understanding of the present application, the present application will be described in more detail below with reference to the accompanying drawings and specific examples. It will be understood that when an element is referred to as being "fixed" to another element, it can be directly on the other element or one or more intervening elements may be present therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween. The terms "upper," "lower," "inner," "outer," "bottom," and the like as used in this specification are used in an orientation or positional relationship based on that shown in the drawings, merely to facilitate the description of the present application and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Unless defined otherwise, 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 application belongs. The terminology used in the description of the present application in this description is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.

In addition, the technical features described below in the different embodiments of the present application may be combined with each other as long as they do not collide with each other.

Fig. 1 is a schematic structural diagram of a PIFA antenna in a top view according to an embodiment of the present application. Referring to fig. 1, the PIFA antenna may be a stacked structure formed by a substrate 10, a radiator 20 disposed on an upper surface of the substrate 10, and a feeding unit 310 and a ground feeding unit 320 disposed on an upper surface of the radiator 20.

In the present embodiment, the upper surface of the substrate 10 is referred to as "first surface" for convenience of description. It should be noted that this "first" is only used to refer to the front side of the substrate 10 and is not intended to limit specific surfaces.

Wherein the substrate 10 may be formed using any suitable type of medium (e.g., plastic or foam, etc.) having a non-conductive structure of a particular shape and size. The specific shape and size of the material can be determined according to the actual use scene. In this embodiment, the term "plate" is used to denote that the layer structure has a relatively flat shape.

In the embodiment of the present application, the substrate 10 may be an FPC antenna substrate or an LDS antenna substrate.

The radiator 20 is a microstrip line (e.g., copper foil) having a specific shape and length, which is disposed on the upper surface of the substrate. Which may be fixed to the surface of the substrate 10 in any suitable form, such as a patch, and which is capable of converting electrical energy fed via a transmission line into electromagnetic radiation and radiating into the air at a corresponding frequency.

In the present embodiment, the radiator 20 specifically includes:

a first radiation unit 210;

a second radiating element 220 connected to one end of the first radiating element 210 in an extending manner and perpendicular to the extending direction of the first radiating element 210;

a third radiating element 230 connected to the second radiating element 220;

and a fourth radiating element 240 formed by a groove formed by connection of the microstrip line of the third radiating element 230 and the microstrip line of the second radiating element 220.

Wherein the term "radiating element" is used to indicate that the radiator is a sheet-like structure having a specific size area, arranged on the surface of the substrate. Which may be chosen and used in particular according to the needs of the actual situation.

In this embodiment, the first radiating element 210 is a wifi2.4g radiating element for controlling the resonant frequency of the wifi2.4g band, and the electrical length of the first radiating element 210 is a quarter of the waveguide wavelength.

The WiFi2.4g frequency band refers to WiFi electromagnetic waves with frequencies of 2.4GHz-2.5 GHz.

The actual size of the first radiating element 210 may be adjusted according to the dielectric constant of the actual carrier, and the microstrip line of the first radiating element 210 increases the line width as much as possible under the premise of allowing the design space, and the auxiliary matching circuit tunes to increase the size of the resonant loop of the first radiating element 210, so as to reduce the derating of the device applying the PIFA antenna under the hand-holding condition.

The second radiating element 220 is a wifi5.1g radiating element for controlling the resonant frequency of the wifi5.1g frequency band, and the electrical length of the second radiating element 220 is a quarter of the waveguide wavelength.

The WiFi5.1g frequency band refers to WiFi electromagnetic waves with frequencies of 5.15Hz-5.35 GHz.

The third radiating element 230 is a GPS L1 radiating element, and is configured to control a resonant frequency of a GPS L1 frequency band, and an electrical length of the third radiating element 230 is a quarter of a waveguide wavelength.

It should be noted that during the debugging process, the triple frequency resonance of the GPS cannot be used as the wifi5.1g frequency band, which has the consequence that the device using the PIFA antenna can be greatly derated in the hand-held condition

The fourth radiating element 240 is a wifi5.8g radiating element, and is configured to control a resonant frequency of the wifi5.8g band. The fourth radiating element 240 is in particular realized by means of a slot. The recess is located between the connection of the microstrip line of the third radiating element 230 and the microstrip line of said second radiating element 220.

The WiFi5.8g frequency band refers to WiFi electromagnetic waves with frequencies of 5.7GHz-5.8 GHz.

The feeding unit 310 and the ground unit 320 are both disposed at the outer edge of the upper surface of the main matching line of the radiator 20, and the feeding unit 310 is an input port for feeding an electromagnetic signal, which may be embodied in any suitable form, such as a microstrip line having a specific length and width.

The ground feed unit 320 may specifically select and use a corresponding conductive material, size and shape according to the actual situation.

It should be noted that the PIFA antenna shown in fig. 1 is only for illustrative purposes, and one skilled in the art may add, adjust, replace or omit one or more functional components thereof as needed in the actual situation, and is not limited to that shown in fig. 1. The technical features mentioned in the embodiment of the PIFA antenna shown in fig. 1 can be combined with each other as long as they do not constitute a conflict with each other and can be applied independently in different embodiments as long as they do not constitute a dependency with each other.

Based on the PIFA antenna, the present application also provides a handheld device, the structure schematic diagram of which in side view is shown in fig. 2, the handheld device comprises

The PIFA antenna 1 provided as the above embodiment;

and the PCB 2 is arranged above the PIFA antenna, and the feed unit 310 and the ground feed unit 320 of the PIFA antenna are respectively connected with corresponding contacts of the PCB 2.

It should be noted that, the feeding unit 310 and the ground unit 320 are respectively connected to corresponding contacts of the PCB board 2, and a specific connection manner may be through a wire connection or direct contact, which is not limited.

In addition, another handheld device is provided in an embodiment of the present application, and a schematic structural diagram of the handheld device is shown in fig. 3, including:

the PIFA antenna 1 provided as the above embodiment;

And a matching unit 3 connected with the first radiating unit of the PIFA antenna 1, wherein the matching unit 3 is used for impedance tuning to increase the resonance ring of the first radiating unit.

It should be noted that the description of the present utility model and the accompanying drawings illustrate preferred embodiments of the present utility model, but the present utility model may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, which are not to be construed as additional limitations of the utility model, but are provided for a more thorough understanding of the present utility model. The above-described features are further combined with each other to form various embodiments not listed above, and are considered to be the scope of the present utility model described in the specification; further, modifications and variations of the present utility model may be apparent to those skilled in the art in light of the foregoing teachings, and all such modifications and variations are intended to be included within the scope of this utility model as defined in the appended claims.

Claims

1. A PIFA antenna for use in a handheld device, comprising:

a substrate having a planar first surface;

the radiator of setting in the first surface of base plate, the upper surface outward flange of the main match line of radiator is provided with feed unit and feed ground unit respectively, the radiator includes:

a first radiating element;

the second radiation unit is connected with one end of the first radiation unit in an extending way and is perpendicular to the extending direction of the first radiation unit;

a third radiating element connected to the second radiating element;

and a fourth radiating element formed by a groove formed by the connection of the microstrip line of the third radiating element and the microstrip line of the second radiating element.

2. The PIFA antenna of claim 1, wherein the substrate comprises an FPC antenna substrate or an LDS antenna substrate.

3. The PIFA antenna of claim 1, wherein the first radiating element is a wifi2.4g radiating element for controlling a resonant frequency of a wifi2.4g frequency band.

4. A PIFA antenna according to claim 3, characterized in that the electrical length of the first radiating element is a quarter of the waveguide wavelength.

5. The PIFA antenna of claim 1, wherein the second radiating element is a wifi5.1g radiating element for controlling a resonant frequency of a wifi5.1g frequency band.

6. The PIFA antenna of claim 5, wherein the electrical length of the second radiating element is one quarter of a waveguide wavelength.

7. The PIFA antenna of claim 1, wherein the third radiating element is a GPS L1 radiating element for controlling a resonant frequency of a GPS L1 band, and wherein an electrical length of the third radiating element is one quarter of a waveguide wavelength.

8. The PIFA antenna of claim 1, wherein the fourth radiating element is a wifi5.8g radiating element for controlling a resonant frequency of a wifi5.8g frequency band.

9. A handheld device, comprising:

a PIFA antenna as claimed in any one of claims 1-8;

and the PCB is arranged above the PIFA antenna, and the feed unit and the ground feed unit of the PIFA antenna are respectively connected with corresponding contacts of the PCB.

10. The handheld device of claim 9, further comprising:

and the matching unit is connected with the first radiating unit of the PIFA antenna and is used for carrying out impedance tuning so as to increase the resonance ring of the first radiating unit.