CN216750288U - Electronic equipment, PIFA antenna and metal radiator thereof - Google Patents

Abstract

The utility model relates to the field of antennas, in particular to an electronic device, a PIFA antenna and a metal radiator thereof, which comprise: a first connecting plate; the feed pin and the short circuit pin are arranged on the second bending portion, a spacing groove is formed in the first connecting plate, one end of the spacing groove is located between the first bending portion and the second bending portion, and the other end of the spacing groove is located on one side, away from the first bending portion, of the second bending portion. The utility model adopts the bending technology, so that the volume of the metal radiating body in the PIFA antenna is reduced, the PIFA antenna is convenient to install in the intelligent household electrical appliance, and the metal radiating body can be obtained in a stamping way, thereby simplifying the manufacturing process.

Description

Electronic equipment, PIFA antenna and metal radiator thereof

Technical Field

The utility model relates to the field of antennas, in particular to an electronic device, a PIFA antenna and a metal radiator thereof.

Background

With the increasing popularity of intelligent home appliances, more and more intelligent home appliances will enter our lives, and among them, as a core component for signal transceiving, an antenna plays an important role, and an antenna is a device capable of radiating or receiving electromagnetic waves to transmit information.

The PIFA antenna is an important type of antenna structure, and is widely used in smart home appliances due to its advantages of low cost, low profile, wide coverage band, etc. PIFA antennas generally use a planar radiating element as a radiator, supplemented by a large ground plane as a reflecting surface, with two pins on the radiator for feeding and grounding, respectively.

In the existing intelligent household electrical appliance, the internal structure is complex, the space is narrow, the antenna layout environment is severe, the size of the built-in PIFA antenna is required to be small, and the existing equipment antenna mostly adopts a PCB printed antenna. However, in the household electrical appliance with the metal casing design, the radio frequency electromagnetic wave is shielded by the metal casing, so that the performance of the antenna is seriously deteriorated, and the anti-interference capability of the antenna is poor.

SUMMERY OF THE UTILITY MODEL

The application provides an electronic device, a PIFA antenna and a metal radiator thereof, so as to reduce the size of the PIFA antenna and prevent the PIFA antenna from being interfered by a metal shell.

In order to solve the technical problem, the application adopts a technical scheme that: provided is a metal radiator including: a first connecting plate; the feed pin and the short circuit pin are arranged on the second bending portion, a spacing groove is formed in the first connecting plate, one end of the spacing groove is located between the first bending portion and the second bending portion, and the other end of the spacing groove is located on one side, away from the first bending portion, of the second bending portion.

In some embodiments, the metal radiator further includes a third bending portion, and the third bending portion is disposed on a side of the first connection board away from the first bending portion and the second bending portion.

In some embodiments, the feeding pin and the short-circuit pin are both disposed in a bent manner, and the feeding pin and the short-circuit pin are disposed in a bent manner toward the third bent portion.

In some embodiments, two ends of the third bending portion are respectively provided with a fixing pin, and the fixing pins are bent towards the feeding pin.

In some embodiments, the spacing groove comprises a first subslot, a second subslot, and a third subslot connected in series; one end of the first subslot is located between the first bending part and the second bending part, the other end of the first subslot is connected with the second subslot, the other end of the second subslot is connected with the third subslot, and the other end of the third subslot is located on one side, away from the first bending part, of the second bending part.

In some embodiments, the length of the metal radiator is 14.7mm, the width of the metal radiator is 5mm, the thickness of the metal radiator is 0.3mm, the width of the first bent portion is 1.8mm to 2.5mm, the width of the third bent portion is 0.8mm to 1.5mm, the distance between the feed pin and the short-circuit pin is 2mm, and the width of the spacer slot is 1 mm.

In order to solve the technical problem, the other technical scheme adopted by the application is as follows: a PIFA antenna is provided. The PIFA antenna comprises the metal radiator; the metal radiator and the substrate are spaced at a height of 3.3mm, the substrate is provided with an antenna mounting area, a reflection area, a feed area and a short circuit area which are spaced from each other, the metal radiator covers the antenna mounting area, the feed pin is electrically connected with the feed area, and the short circuit pin is electrically connected with the short circuit area; the feed board is arranged in the feed area; the reflection floor is laid in the reflection area and electrically connected with the feed board.

In some embodiments, the reflective floor is a metal layer laid on the substrate.

In some embodiments, the antenna mounting area is located at an edge position of the substrate.

In order to solve the above technical problem, another technical solution adopted by the present application is: an electronic device is provided. The electronic device includes: a housing; the PIFA antenna is arranged in the shell; the electric control board is arranged on one side in the shell, the electric control board is adjacent to the PIFA antenna, and the PIFA antenna is connected with the electric control board through a conducting wire; the compressor is arranged on one side, far away from the electric control board, in the shell; and a metal housing cover plate covering the housing.

The beneficial effect of this application is:

the utility model adopts the bending technology, so that the volume of the metal radiator in the PIFA antenna is reduced, the PIFA antenna is convenient to install in the intelligent household appliance, and the metal radiator can be obtained in a stamping way, thereby simplifying the manufacturing process;

furthermore, the feed pin, the short circuit pin and the two fixing pins are oppositely bent, so that the antenna can be conveniently welded, the welding is more stable, and the deformation is not easy to occur;

the spacing slot redistributes the current of the antenna radiator, changes the current length, effectively expands the coverage frequency band, and has excellent radiation performance under the condition of keeping smaller antenna height.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts, wherein:

fig. 1 is a schematic structural diagram of a metal radiator in a PIFA antenna according to the present invention;

fig. 2 is a schematic structural diagram of another view angle of the metal radiator in the PIFA antenna according to the present invention;

fig. 3 is a schematic structural diagram of a substrate and a PIFA antenna in the PIFA antenna of the present invention;

fig. 4 is a schematic structural diagram of a substrate in the PIFA antenna of the present invention;

fig. 5 is an exploded view of the substrate and PIFA antenna of the present invention;

FIG. 6 is a schematic view of an electronic device according to the present invention

Fig. 7 is a schematic diagram of the reflection coefficient of the PIFA antenna of the present invention;

fig. 8 is a radiation diagram of the PIFA antenna XOY direction of the present invention;

fig. 9 is a radiation diagram of the PIFA antenna XOZ direction of the present invention;

fig. 10 is a radiation diagram of the inventive PIFA antenna in the YOZ direction.

Description of the reference symbols: 10-shell, 20-PIFA antenna, 30-compressor, 40-electric control board, 50-metal casing cover board, 200-substrate, 210-reflection floor, 220-feed board, 230-metal radiator, 240-antenna installation area, 250-reflection area, 260-feed area, 270-short circuit area, 231-first connecting board, 232-first bending part, 233-second bending part, 234-third bending part, 235-spacing groove, 2331-feed pin, 2332-short circuit pin, 2341-fixing pin, 2351-first sub-groove, 2352-second sub-groove and 2353-third sub-groove.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

All directional indications (such as up, down, left, right, front, and rear … …) in the embodiments of the present application are only used to explain the relative positional relationship between the components, the movement, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

As noted above, while the preferred embodiments of the utility model have been illustrated and described, many changes can be made without departing from the spirit and scope of the utility model. Accordingly, the scope of the utility model is not limited by the disclosure of the preferred embodiments. Rather, the utility model should be determined entirely by reference to the claims that follow.

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

As shown in fig. 6, the electronic device in the present application includes a housing 10, and the housing 10 may provide a mounting base for other components; the PIFA antenna 20, the PIFA antenna 20 is disposed in the housing 10, the electronic device can transfer signals through electromagnetic waves transmitted or received by the PIFA antenna 20, the PIFA antenna 20 can be mounted in the housing 10 by welding, bonding, and the like, and the PIFA antenna is not particularly limited herein; an electric control board 40 is arranged on one side in the shell 10, the electric control board 40 is adjacent to the PIFA antenna 20, and the PIFA antenna 20 is connected with the electric control board 40 through a conducting wire; the compressor 30 is arranged in the shell 10, the compressor 30 is arranged on the side far away from the PIFA antenna 20, and if the compressor 30 is arranged near the PIFA antenna 20, the performance of the antenna and the networking performance of the electronic equipment are seriously affected; and a metal housing cover plate 50, wherein the metal housing cover plate 50 is covered on the shell 10, and the metal housing cover plate 50 corresponds to the positions of the PIFA antenna 20, the compressor 30 and the electric control board 40.

The housing 10 is generally made of a non-metallic material such as ABS (acrylonitrile butadiene styrene), and has excellent impact resistance, heat resistance, low temperature resistance, chemical resistance, and electrical properties, and also has the characteristics of easy processing, stable product size, and good surface gloss.

Specifically, the electronic device may be any one of intelligent household appliances, specifically, the electronic apparatus may be an intelligent refrigerator, an intelligent air conditioner, an intelligent microwave oven, an intelligent electric fan, an intelligent washing machine, and the like, and the specific type of the electronic device is not limited in the embodiments of the present invention.

A Planar Inverted F Antenna (PIFA) is a variant of a planar monopole antenna, and more particularly, a variant of a planar inverted L antenna, which is presented to solve the problem that the input impedance of an inverted L antenna is not easy to adjust.

As an embodiment, as shown in fig. 3, 4 and 5, the PIFA antenna 20 includes a substrate 200, a feeding board 220, a reflecting floor 210 and a metal radiator 230, specifically, the substrate 200 may have a length of 20mm and a width of 15mm, and of course, in some other embodiments, the length and the width of the substrate 200 may be adaptively changed and are not limited in detail. Specifically, the base board 200 and the electronic control board 40 are connected by a wire.

As shown in fig. 3, an antenna mounting area 240 is disposed on the substrate 200, a metal radiator 230 is covered in the antenna mounting area 240, the metal radiator 230 is used for radiating and receiving electromagnetic wave signals, the antenna mounting area 240 is located at an edge of the substrate 200 and is kept empty, that is, at least a part of empty area is reserved below the metal radiator 320, so as to obtain a lower SAR value, and at the same time, improve the radiation efficiency of the PIFA antenna, thereby being capable of better radiating electromagnetic waves to the outside, and further improving the performance of electronic devices having the PIFA antenna, the metal radiator 230 is generally made of cupronickel, which has the characteristics of high temperature resistance, fire resistance, suitability for engineering application, good weldability, good electrical conductivity, and corrosion resistance.

In this embodiment, the length of the metal radiator 230 may be 14.7mm, the width may be 5mm, the height interval between the metal radiator 230 and the substrate 200 may be 3.3mm, and the thickness of the metal radiator 230 may be 0.3mm, so that when the height interval between the metal radiator 230 and the substrate 200 increases, the resonant frequency decreases and the input impedance increases; when the height interval between the metal radiator 230 and the substrate 200 is reduced, the resonant frequency is increased and the input impedance is reduced. Of course, in some other embodiments, the length and width of the substrate 200, the length and width of the metal radiator 230, the height interval between the metal radiator 230 and the substrate 200, and the thickness of the metal radiator 230 may be varied accordingly, and are not limited herein.

As shown in fig. 4, the substrate 200 is provided with a feeding region 260 and a short-circuit region 270 spaced from each other, the feeding board 220 is mounted in the feeding region 260, and the feeding board 220 is a circuit board and serves as a signal transmission line.

As shown in fig. 3, a reflection area 250 is disposed on the substrate 200, a reflection floor 210 is laid in the reflection area 250, the reflection floor 210 can improve the receiving sensitivity of the antenna signal, the reflection floor 210 can reflect and gather the antenna signal on a receiving point, not only the receiving capability of the antenna is greatly enhanced, but also the reflection floor 210 can block and shield other electric waves from the back, and interfere with the received signal. The reflecting floor 210 is electrically connected to the feeding board 220, the reflecting floor 210 is a metal layer, and the reflecting area 250 does not overlap with the antenna mounting area 240, and therefore the reflecting floor 210 does not overlap with the antenna.

As shown in fig. 7-10, PIFA antenna 20 resonates at 2.4GHz-2.5GHz, so PIFA antenna 20 uses wifi/BT band at 2.4 GHz.

In a specific embodiment, as shown in fig. 1 to 2, the metal radiator 230 includes a first connection board 231, a first bent portion 232, a second bent portion 233 and a third bent portion 234, the first connection board 231 is provided with the first bent portion 232 and the second bent portion 233, the first bent portion 232 and the second bent portion 233 are located on the same side, the bending directions of the first bent portion 232 and the second bent portion 233 are the same, the first connection board 231 is provided with the third bent portion 234, and the third bent portion 234 and the first bent portion 232 and the second bent portion 233 are respectively arranged at two sides of the first connection board 231.

Alternatively, the first bent portion 232, the second bent portion 233 and the third bent portion 234 may be perpendicular to and communicate with the first connecting plate 231, or an angle between the first bent portion 232, the second bent portion 233 and the third bent portion 234 and the first connecting plate 231 may be set to be an acute angle, the width of the first bent portion 232 is 1.8mm-2.5mm, and the width of the third bent portion 234 is 0.8mm-1.5mm, by providing the bent portion on the first connecting plate 231, the volume of the antenna is effectively reduced, and the PIFA antenna 20 is directly formed by stamping, so that the uniformity of the PIFA antenna 20 is ensured.

The second bending part 233 includes a feeding pin 2331 and a short-circuit pin 2332, the second bending part 233 is provided with the feeding pin 2331 and the short-circuit pin 2332 for power supply and grounding, the feeding pin 2331 is electrically connected with the feeding region 260, and the feeding pin 2331 and the feeding region 260 are connected through a section of microstrip line, but is not limited to the microstrip line, and may also be an elastic pin, a Pogo pin, or the like as a connection line for signal transmission; the short-circuit pin 2332 is electrically connected to the short-circuit region 270, and the short-circuit pin 2332 and the short-circuit region 270 are also connected by a microstrip line, but the short-circuit pin is not limited to a microstrip line, and may be a connection line for signal transmission, such as an elastic pin or a Pogo pin, and the feed pin 2331 and the short-circuit pin 2332 are both bent toward the third bent portion 234.

The third bending part 234 is provided with a plurality of fixing pins 2341, the fixing pins 2341 are bent towards the second bending part 233 and the first bending part 232, the feeding pins 2331, the short-circuit pins 2332 and the fixing pins 2341 are bent, and the feeding pins 2331, the short-circuit pins 2332 and the fixing pins 2341 can be fixedly arranged on the substrate 200 through an SMT processing process, so that the PIFA antenna 20 can be welded more stably and is not easy to deform.

It is understood that, in the description of this application, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

Alternatively, the distance between the feeding pin 2331 and the shorting pin 2332 may be 2mm, but in some other embodiments, the distance may be changed accordingly, and is not limited herein. In the case that the smart home appliance is limited in structure and the height of the metal radiator 230 is limited, the impedance matching can be optimized by changing the distance between the feeding pin 2331 and the shorting pin 2332, wherein the general rule is that when the distance between the feeding pin 2331 and the shorting pin 2332 increases, the resonant frequency increases and the input impedance decreases; as the distance between the feed pin 2331 and the shorting pin 2332 decreases, the resonant frequency decreases and the input impedance increases.

As shown in fig. 2, a spacing groove 235 is formed in the first connecting plate 231, one end of the spacing groove 235 is located between the first bending portion 232 and the second bending portion 233, the other end of the spacing groove 235 is located on one side of the second bending portion 233 far away from the first bending portion 232, and the width of the spacing groove 235 may be 1 mm. Of course, in some other embodiments, the width of the spacing groove 235 may be varied and is not specifically limited herein. The spacing groove 235 can make the current form a meander on the metal radiator 230, and also can prolong the current return path, introduce resonance in the working band, reduce the volume of the antenna while expanding the coverage frequency band, make the overall structure of the antenna more compact, and reduce the height of the radiator and the difficulty of radiator processing.

Specifically, the partition groove 235 includes a first sub-groove 2351, a second sub-groove 2352 and a third sub-groove 2353 which are connected in sequence; one end of the first sub-groove 2351 is positioned between the first bent portion 232 and the second bent portion 233, the other end is connected with the second sub-groove 2352, the other end of the second sub-groove 2352 is connected with the third sub-groove 2353, and the other end of the third sub-groove 2353 is positioned on one side of the second bent portion 233, which is far away from the first bent portion 232.

The impedance bandwidth of the PIFA antenna 20 can be further widened on the original basis by providing the spacing slot 235, wherein the specific frequency value of the resonance point can be adjusted by adjusting the length and width of the spacing slot 235.

The PIFA antenna 20 has more concentrated energy in a high frequency band, and thus more meets the requirement of an intelligent appliance, and according to the transmission characteristics of electromagnetic waves, the higher the frequency is, the shorter the wavelength is, and the shorter the wavelength is, the shorter the propagation distance is, wherein the intelligent appliance is generally applied indoors or in a small range, and has a small space but a complex environment. Therefore, the smart home appliance has a low requirement for transmission distance but a high requirement for penetration. The PIFA antenna has high gain in a high frequency band, so that the PIFA antenna better meets the requirements of application scenes of intelligent household appliances.

The PIFA antenna 20 has a compact overall design structure, has good all-directional radiation performance, can adapt to a complex application environment in electronic equipment, and has strong anti-interference capability; through laboratory tests, the electronic equipment can still have good networking capability in a weak network environment.

The above embodiments are merely examples and are not intended to limit the scope of the present disclosure, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present disclosure or those directly or indirectly applied to other related technical fields are intended to be included in the scope of the present disclosure.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Spatially relative terms, such as "inner," "outer," "below," "… …," "lower," "above," "upper," and the like, may be used herein for ease of description to describe a relationship between one element or feature and one or more other elements or features as illustrated in the figures. Spatially relative terms may be intended to encompass different orientations of the device in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the example term "below … …" can encompass both an orientation of facing upward and downward. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors herein interpreted.

Claims (10)

1. A metal radiator, comprising:

a first connecting plate;

the feed pin and the short circuit pin are arranged on the second bending portion, a spacing groove is formed in the first connecting plate, one end of the spacing groove is located between the first bending portion and the second bending portion, and the other end of the spacing groove is located on one side, away from the first bending portion, of the second bending portion.

2. The metal radiator of claim 1, further comprising a third bent portion disposed on a side of the first connection board away from the first bent portion and the second bent portion.

3. The metal radiator of claim 2, wherein the feeding pin and the shorting pin are both bent, and the feeding pin and the shorting pin are bent toward the third bent portion.

4. The metal radiator according to claim 3, wherein fixing pins are respectively disposed at two ends of the third bent portion, and the fixing pins are bent toward the feeding pin.

5. The metal radiator of claim 1, wherein the spacing slot comprises a first subslot, a second subslot, and a third subslot connected in sequence; one end of the first subslot is located between the first bending part and the second bending part, the other end of the first subslot is connected with the second subslot, the other end of the second subslot is connected with the third subslot, and the other end of the third subslot is located on one side, away from the first bending part, of the second bending part.

6. The metal radiator of claim 4, wherein the length of the metal radiator is 14.7mm, the width of the metal radiator is 5mm, the thickness of the metal radiator is 0.3mm, the width of the first bent portion is 1.8mm-2.5mm, the width of the third bent portion is 0.8mm-1.5mm, the distance between the feed pin and the short pin is 2mm, and the width of the spacer slot is 1 mm.

7. A PIFA antenna, characterized in that the PIFA antenna comprises:

the metal radiator of any one of claims 1 to 6;

the metal radiator and the substrate are spaced at a height of 3.3mm, the substrate is provided with an antenna mounting area, a reflection area, a feed area and a short circuit area which are spaced from each other, the metal radiator covers the antenna mounting area, the feed pin is electrically connected with the feed area, and the short circuit pin is electrically connected with the short circuit area;

the feed board is arranged in the feed area;

the reflection floor is laid in the reflection area and electrically connected with the feed board.

8. The PIFA antenna of claim 7, wherein said reflective floor is a metal layer laid on said substrate.

9. The PIFA antenna of claim 8, wherein said antenna mounting area is located at an edge of said substrate.

10. An electronic device, characterized in that the electronic device comprises: a housing;

a PIFA antenna as claimed in any one of claims 7 to 9, disposed within the housing;

the electric control board is arranged on one side in the shell, the electric control board is adjacent to the PIFA antenna, and the PIFA antenna is connected with the electric control board through a conducting wire;

the compressor is arranged on one side, far away from the electric control board, in the shell;

and a metal housing cover plate covering the housing.

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