CN2881993Y - Miniature Single Frequency Planar Inverted-F Antenna - Google Patents

Abstract

The utility model provides a miniature single-frequency planar inverted-F antenna. The miniature single-frequency planar inverted-F antenna includes a grounded base plate, an antenna vibrator and a feed path connecting portion connecting the antenna vibrator and the grounded base plate. One side of the ground base plate is bent to provide a feed path connection portion, and the end of the feed path connection portion away from the ground base plate is bent to provide a first part of the antenna oscillator parallel to the ground base plate, and the first part of the antenna oscillator passes through the first oscillator connection portion , the second vibrator connection part, the third vibrator connection part, the third vibrator connection part is connected to the second part of the vibrator, the second part of the vibrator is parallel to the grounding base plate, and a insulator medium.

Description

Miniature Single Frequency Planar Inverted-F Antenna

【Technical field】

The utility model relates to an antenna, in particular to a miniature single-frequency planar inverted-F antenna.

【Background technique】

With the miniaturization of communication equipment, it is inevitable that the design of antennas will also be miniaturized accordingly. The solution for antenna miniaturization has become a mature development field in the existing technology. For example, planar inverted-F antennas, high dielectric constant antennas, slot antennas, small helical antennas, and microstrip antennas are all technologies developed to adapt to the miniaturization of antennas.

Planar Inverted-F Antenna (PIFA) is a commonly used small antenna suitable for communication terminals. It adapts to the trend of miniaturization and design simplification of electronic devices, as well as the demand for miniaturization of antennas. One advantage of this type of antenna is that it can effectively reduce the occupied space and manufacturing cost, and another advantage is that the performance of the antenna is easy to adjust under different working environments.

The traditional single-frequency planar inverted-F antenna has a basic structure of an antenna oscillator, a grounded base plate, and a connecting part connecting the antenna oscillator and the grounded base plate. It is generated by the antenna oscillator through the air as a medium in the form of an electric field or a magnetic field. To achieve work by excitation or resonance, the antenna oscillator adjusts the frequency band to be worked through a single oscillator structure. Correspondingly, when designing the antenna, in order to meet the required operating frequency band, it is also realized by adjusting the length of the single antenna dipole.

The above-mentioned traditional single-frequency planar inverted F-type antenna uses a single antenna oscillator structure to realize the working frequency band of the antenna. In the case of satisfying the predetermined working frequency band of the antenna, the overall length of the antenna is constrained by the length of the antenna oscillator, and the overall occupied space of the antenna is affected by the overall length of the antenna. Therefore, in the case of a given working frequency, the length of the vibrator of this type of antenna is relatively large, the overall length of this type of antenna is relatively large, and this type of antenna occupies a large space. It is really necessary to improve this type of traditional single-frequency planar inverted-F antenna to provide a single-frequency planar inverted-F antenna that occupies less space.

【Content of invention】

In view of the above problems in the prior art, it is necessary to provide a single-frequency planar inverted-F antenna that occupies less space. Therefore, the purpose of the present utility model is to provide a miniature single-frequency planar inverted-F antenna. The miniature single-frequency planar inverted-F antenna adopts a method of shortening the length of the antenna element, shortening the overall length of the antenna, thereby reducing the overall occupied space of the antenna.

In order to achieve the above object, the utility model provides a miniature single-frequency planar inverted-F antenna, which includes a grounded base plate, an antenna vibrator and a feeder connecting the antenna vibrator and the grounded base plate. A path connection part, one side of the ground base plate is bent to provide a feed path connection part, and one end of the feed path connection part away from the ground base plate is bent to provide a first part of the antenna oscillator parallel to the ground base plate, and the first part of the antenna oscillator is far away from the ground base plate. One end of the feed path connecting portion is bent toward the grounding base plate, and a first vibrator connecting portion parallel to and coplanar with the feeding path connecting portion is provided, and the end of the first vibrator connecting portion away from the first part of the vibrator is connected to the feeding path A second vibrator connection portion perpendicular to and coplanar with the first vibrator connection portion is provided in the direction of the first vibrator connection portion, and a second dipole connection portion parallel to the ground base plate is provided at the end of the second vibrator connection portion away from the first vibrator connection portion and bent toward the grounded base plate. Three vibrator connecting parts, the end of the third vibrator connecting part away from the second vibrator connecting part is provided with a vibrator second part perpendicular to and coplanar with the third vibrator connecting part in the direction of the first vibrator connecting part, the An insulator medium is provided between the second part of the vibrator and the grounding base plate.

In particular, the miniature single-frequency planar inverted-F antenna of the present invention also includes a feeder. There is a feed point on the first part of the vibrator or the second part of the vibrator. The feeder includes an inner core wire and a shielding layer. The inner core wire One end is electrically connected to the feed point, and one end of the shielding layer is electrically connected to the ground plane.

In particular, there is a notch on the ground base plate. The length of the notch is slightly longer than that of the second vibrator connection part. area.

In particular, the length of the third vibrator connecting portion is smaller than the width of the grounding base.

In particular, the length of the connecting portion of the first vibrator is shorter than the length of the connecting portion of the feed path.

In particular, the height of the insulator medium is exactly the distance between the second part of the vibrator and the grounding base.

In particular, the plane shape of the insulator medium is the plane shape of the second part of the vibrator.

Compared with the prior art, the utility model adopts a bending structure, connects the two parts of the vibrator through three connecting parts of the vibrator, replaces the previous single vibrator structure by the two parts of the vibrator, and the second part of the vibrator is connected to the grounding base plate There is an insulator medium between them, which can reduce the length of the second part of the vibrator, thereby reducing the overall length of the antenna, and achieving the purpose of reducing the space occupied by the antenna.

In order to have a further understanding of the purpose, structural features and functions of the utility model, hereby cooperate with the drawings to describe in detail as follows:

【Description of drawings】

FIG. 1 is a structural diagram of a preferred embodiment of the miniature single-frequency planar inverted-F antenna of the present invention.

FIG. 2 is a planar expansion dimension diagram of a preferred embodiment of the miniature single-frequency planar inverted-F antenna of the present invention.

FIG. 3 is a side dimension view of a preferred embodiment of the miniature single-frequency planar inverted-F antenna of the present invention.

FIG. 4 is a front dimension diagram of a preferred embodiment of the miniature single-frequency planar inverted-F antenna of the present invention.

FIG. 5 is a top view dimension diagram of a preferred embodiment of the miniature single-frequency planar inverted-F antenna of the present invention.

【Detailed ways】

Please combine with Fig. 1, Fig. 1 is a structural diagram of a preferred embodiment of the utility model miniature single-frequency planar inverted-F antenna, a miniature single-frequency planar inverted-F antenna provided by the utility model, the miniature single-frequency planar The inverted F-shaped antenna includes a ground base plate 1, an antenna vibrator 2, and a feed path connecting portion 3 connecting the antenna vibrator 2 and the ground base plate 1. The feed path connection portion 3 is bent on one side of the ground base plate 1, The end of the feed path connection part 3 away from the ground base plate 1 is bent to form a first part 21 of the antenna oscillator parallel to the ground base plate 1, and the end of the antenna oscillator first part 21 away from the feed path connection part 3 is bent toward the ground base plate 1. A first vibrator connecting portion 22 parallel to and coplanar with the feeding path connecting portion 3 is provided in the direction of the feeding path connecting portion 3, and a first vibrator connecting portion 22 is provided in the direction of the feeding path connecting portion 3 at the end far away from the first part 21 of the vibrator. A vibrator connecting portion 22 is vertical and coplanar to a second vibrator connecting portion 23 , the end of the second vibrator connecting portion 23 away from the first vibrator connecting portion 21 is bent towards the grounding base plate 1 and a third portion parallel to the grounding base plate 1 is provided. The vibrator connecting portion 24, the end of the third vibrator connecting portion 24 away from the second vibrator connecting portion 23 is provided with a vibrator second perpendicular to the third vibrator connecting portion 24 and coplanar with the first vibrator connecting portion 22. Two parts 25 , an insulator medium 4 is provided between the second part 25 of the vibrator and the grounded base plate 1 .

In particular, the utility model miniature single-frequency planar inverted-F antenna also includes a feeder (not shown), there is a feed point (not shown) on the first part 21 of the vibrator or the second part 25 of the vibrator, and the feeder (not shown) (not shown) includes an inner core wire and a shielding layer, one end of the inner core wire is electrically connected to the feed point (not shown in the figure), and one end of the shielding layer is electrically connected to the grounding base plate 1 .

In particular, there is a notch 10 on the ground base plate. The length of the notch 10 is slightly longer than that of the second vibrator connecting portion 23. Fall on the region where the notch part 10 is located.

In particular, the length of the third vibrator connecting portion 24 is smaller than the width of the ground plane 1 .

In particular, the length of the first vibrator connection portion 22 is shorter than the length of the feed path connection portion 3 .

In particular, the height of the insulator medium 4 is just equal to the distance between the second part 25 of the vibrator and the ground plane 1 .

In particular, the plane shape of the insulator medium 4 is the plane shape of the second part 25 of the vibrator.

Please refer to FIG. 2 , FIG. 3 , FIG. 4 , and FIG. 5 , which respectively show the planar development dimension drawing, side view dimension drawing, front view dimension drawing, and top view dimension drawing of a preferred embodiment of the present invention. From the dimensions marked in the figure, it can be seen that in this embodiment, the specific dimensions of each part.

The utility model adopts a bending structure, and the two parts of the vibrator are connected by three connecting parts of the vibrator, and the previous single vibrator structure is replaced by the two parts of the vibrator, and an insulator medium is arranged between the second part of the vibrator and the grounding base plate, The length of the second part of the vibrator can be reduced, thereby reducing the overall length of the antenna and achieving the purpose of reducing the space occupied by the antenna.

Claims (8)

1, this miniature single-frequency planar inverted F-shape antenna comprises a ground connection base plate, one antenna oscillator and connect this antenna oscillator and the feed path connecting portion of this ground connection base plate, it is characterized in that, this ground connection base plate one lateral buckling is provided with feed path connecting portion, this feed path connecting portion is provided with an antenna oscillator first that is parallel to the ground connection base plate away from the bending of this ground connection base plate one end, this antenna oscillator first is provided with the first oscillator connecting portion of an and coplane parallel with this feed path connecting portion to ground connection base plate direction away from the bending of this feed path connecting portion one end, this first oscillator connecting portion is provided with the second oscillator connecting portion of an and coplane vertical with this first oscillator connecting portion to this feed path connecting portion direction away from oscillator first one end, this second oscillator connecting portion is provided with the 3rd an oscillator connecting portion that is parallel to the ground connection base plate away from the bending of this first oscillator connecting portion, one end to ground connection base plate direction, the 3rd oscillator connecting portion is provided with the oscillator second portion of an and coplane vertical with the 3rd oscillator connecting portion away from this second oscillator connecting portion, one end to this first oscillator connecting portion direction, is provided with an insulator medium between this oscillator second portion and the ground connection base plate.

2, miniature single-frequency planar inverted F-shape antenna as claimed in claim 1, it is characterized in that, the miniature single-frequency planar inverted F-shape antenna of the utility model also includes a feeder line, there is a feedback point on this oscillator first or this oscillator second portion, this feeder line includes internal core wire and screen, this internal core wire one end is electrically connected on this feedback point, and this screen one end is electrically connected on the ground connection base plate.

3, miniature single-frequency planar inverted F-shape antenna as claimed in claim 1, it is characterized in that, one barbed portion is arranged on the ground connection base plate, this barbed portion length is for slightly being longer than this second oscillator connecting portion, and this barbed portion region is dropped on fully for this second oscillator connecting portion projection on plane, ground connection base plate place in this barbed portion position.

4, miniature single-frequency planar inverted F-shape antenna as claimed in claim 1, it is characterized in that, this first radiation conductor slice, the second radiation conductor leaf length, width are all identical, and the 3rd radiation conductor leaf length is less than this first radiation conductor slice, the second radiation conductor leaf length.

5, miniature single-frequency planar inverted F-shape antenna as claimed in claim 1 is characterized in that the length of the 3rd oscillator connecting portion is less than the width of ground connection base plate.

6, miniature single-frequency planar inverted F-shape antenna as claimed in claim 1 is characterized in that, the length of this first oscillator connecting portion is less than the length of feed path connecting portion.

7, miniature single-frequency planar inverted F-shape antenna as claimed in claim 1 is characterized in that, the height of this insulator medium is the distance between this oscillator second portion and the ground connection base plate just.

8, miniature single-frequency planar inverted F-shape antenna as claimed in claim 1 is characterized in that, the flat shape of this insulator medium is the flat shape of this oscillator second portion.

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