CN201887146U - Multi-frequency antenna - Google Patents

Abstract

The utility model discloses a multifrequency antenna, for a flat board type of falling F antenna, including basal portion, high frequency radiation portion, low frequency radiation portion and ground connection portion. The base part is rectangular sheet-shaped and is provided with a first lateral edge and a second lateral edge which are opposite, and a feed-in point is arranged at one end of the base part close to the second lateral edge. The high-frequency radiation portion is formed to extend perpendicularly outward from one end of the first side edge. The low-frequency radiating part comprises a first extending part formed by vertically extending outwards from the other end of the first side edge, and a second extending part and a third extending part which are arranged between the first extending part and the high-frequency radiating part and extend in parallel with the first extending part in sequence. The grounding part is formed by bending and extending from the second side edge and is arranged in parallel with the high-frequency radiation part, the first extension part, the second extension part and the third extension part. The utility model discloses multifrequency antenna is miniaturized, and simple structure, cost of manufacture are low and can cover five frequency bands.

Description

multi-frequency antenna

technical field

The utility model relates to an antenna, in particular to a multi-frequency antenna suitable for a tablet computer of a hand-held wireless communication device.

Background technique

The traditional planar invert-Fantenna (Planar invert-Fantenna) design mostly includes a single antenna element (Single antenna element), which has small size, light weight, easy device integration, omnidirectional and multi-frequency (generally can cover Three-band to four-band) and other advantages, suitable for assembly in mobile devices (such as notebook computers), as the function of wireless signal reception and transmission.

With the continuous improvement of wireless carriers, tablet computers are becoming more and more popular. The structural design of tablet computers often makes the flat inverted-F antenna very close to the computer motherboard, because the electronic components on the computer motherboard will interfere with the flat inverted-F antenna. , so that the characteristics of the antenna are reduced; coupled with the vigorous development of wireless communication technology, it is required that the volume of the antenna installed in the tablet computer should be as small as possible and have more operating frequency bands.

Utility model content

The purpose of this utility model is to provide a multi-frequency antenna suitable for tablet computers in view of the deficiencies in the prior art above. , AMPS 824 ~ 894MHZ and GSM880 ~ 960MHZ bandwidth requirements.

In order to achieve the above purpose, the utility model provides a multi-frequency antenna, which is a planar inverted-F antenna, including a base, a high-frequency radiation part, a low-frequency radiation part and a grounding part. The base is roughly in the shape of a rectangular sheet, has a first side edge and a second side edge opposite to the first side edge, and a feed-in point is provided at one end of the base near the second side edge. The high-frequency radiating portion is formed by extending vertically outward from one end of the first side edge of the base portion and being flush with the end edge thereof. The low-frequency radiating part includes a strip-shaped first extending part extending vertically outward from the other end of the first side edge, and a strip-shaped first extending part arranged between the first extending part and the high-frequency radiating part and extending in parallel with the first extending part in turn. The second extension part and the third extension part, the end of the first extension part is connected to the second extension part through the first connection part, and the end of the second extension part is connected to the third extension part through the second connection part. The ground portion is formed by bending and extending from the second side edge, and is arranged parallel to the first extension portion, the second extension portion, and the third extension portion of the high-frequency radiation portion and the low-frequency radiation portion.

As mentioned above, through the layout and miniaturization of the planar inverted F-type antenna of the multi-frequency antenna of the present invention, the antenna of the present invention occupies a small space, so as to be far away from the electronic parts on the circuit board of the electronic product, thereby avoiding interference and improving multiple The utility model multi-frequency antenna has simple structure, low manufacturing cost and can cover the bandwidth requirements of AMPS824～894MHZ, GSM880～960MHZ, DCS1710～1880MHZ, PCS1850～1990MHZ and PCS2110～2170MHZ.

Description of drawings

Figure 1 is a plan view of the multi-frequency antenna of the present invention.

The reference signs in the figure are explained as follows:

Base 1 1st side edge 101

Second side edge 102 Feed point 11

High Frequency Radiation Department 2 Low Frequency Radiation Department 3

The first connecting part 301 The second connecting part 302

Grooving 303 Projection 304

First Extension 31 Second Extension 32

Third Extension 33 Grounding 4

Ground connection part 401 Ground point 41

Detailed ways

In order to describe the technical content, structural features, achieved goals and effects of the present utility model in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

Please refer to Fig. 1, the multi-frequency antenna of the present utility model is a planar inverted F-shaped antenna, which is located on a circuit board (not shown) in an electronic device, and includes a base 1, a high-frequency radiation portion 2, and a low-frequency radiation portion 3 And the grounding part 4.

The base 1 is substantially in the shape of a rectangular sheet, and the base 1 has a first side edge 101 and a second side edge 102 opposite to the first side edge 101 . A feeding point 11 is provided at one end of the base 1 close to the second side edge 102 .

One end of the first side edge 101 of the base portion 1 is parallel to the end edge and extends vertically outward to form a strip-shaped high-frequency radiation portion 2 . In this embodiment, the high frequency radiation part 2 extends obliquely upward relative to the plane where the base part 1 is located, that is, extends obliquely upward relative to the circuit board.

The other end of the first side edge 101 of the base 1 is parallel to the end edge and extends vertically outward to form the low frequency radiation portion 3 . Specifically, the low-frequency radiation part 3 includes a strip-shaped first extension part 31 extending vertically outward from the other end of the first side edge 101, and is arranged between the first extension part 31 and the high-frequency radiation part 2. And the second extension part 32 and the third extension part 33 extend parallel to the first extension part 31 in sequence. The end of the first extension part 31 is connected to the second extension part 32 through the first connection part 301 , and the end of the second extension part 32 is connected to the third extension part 33 through the second connection part 302 . Wherein, a rectangular slot 303 is provided on the side edge of the first connecting portion 301 facing the high-frequency radiation portion 2 and away from the base 1 , and one end of the second extending portion 32 connected to the first connecting portion 301 faces toward the first extending portion 31 . One side extends to form a protruding portion 304 .

The ground portion 4 is formed by bending and extending from the second side edge 102 , and is parallel to the first extension portion 31 , the second extension portion 32 and the third extension portion 33 of the high frequency radiation portion 2 and the low frequency radiation portion 3 . Specifically, the other end of the second side edge 102 of the base 1 is parallel to the end edge and extends vertically outwards, and then extends parallel to the second side edge 102 to form a ground connection part 401. The end of the ground connection part 401 is provided with The ground point 41 , the end of the ground connection part 401 extends out of the ground part 4 toward the base.

When the multi-frequency antenna of the present invention is used in communication, the grounding part 4 is used to increase the contact area between the multi-frequency antenna and the reference ground (ie, the circuit board of electronic products), so as to cooperate with the low-frequency radiation part 3 to increase the radiation frequency band. Thus, the low-frequency radiation part 3 is used to generate the resonance mode of the lower operating frequency band AMPS 824-894MHZ and GSM880-960MHZ of the multi-frequency antenna, and the high-frequency radiation part 2 can generate the higher operating frequency band of the multi-frequency antenna Resonant mode of DCS1710～1880MHZ, PCS1850～1990MHZ and PCS2110～2170MHZ. Therefore, the utility model multi-frequency antenna 1 can cover five frequency bands of DCS1710-1880MHZ, PCS1850-1990MHZ, AMPS824-894MHZ, GSM880-960MHZ and PCS2110-2170MHZ.

In summary, through the layout and miniaturization of the flat inverted F-shaped antenna of the multi-frequency antenna of the present invention, the multi-frequency antenna of the present invention occupies a small space, so as to be far away from the electronic parts on the circuit board of the electronic product, thereby avoiding interference , improve the use characteristics of the multi-frequency antenna; and make the utility model multi-frequency antenna simple in structure, low in production cost and can cover the bandwidth requirements of AMPS824-894MHZ, GSM880-960MHZ, DCS1710-1880MHZ, PCS1850-1990MHZ and PCS2110-2170MHZ.

Claims (4)

1. multifrequency antenna, it is a dull and stereotyped inverted F shaped antenna, it is characterized in that: comprise base portion, high-frequency radiation part, low frequency radiation portion and grounding parts, base portion roughly is a rectangle sheet, have first lateral margin and second lateral margin relative with first lateral margin, this base portion one end is provided with load point near the second lateral margin place; High-frequency radiation part is from an end and the evenly vertical formation that stretches out of its ora terminalis of first lateral margin of this base portion; Low frequency radiation portion comprise from the other end of first lateral margin vertically stretch out the strip that forms first extension and be laid between first extension and the high-frequency radiation part and with second extension and the 3rd extension of first extension parallel extension arranged side by side successively, the end of first extension is connected with second extension by first connecting portion, and the end of second extension is connected with the 3rd extension by second connecting portion; Grounding parts extends to form from second lateral margin bending, and be arranged in parallel with first extension, second extension and the 3rd extension of high-frequency radiation part and low frequency radiation portion.

2. multifrequency antenna as claimed in claim 1 is characterized in that: described high-frequency radiation part is elongated, and this high-frequency radiation part extends upward with respect to the plane inclination at base portion place.

3. multifrequency antenna as claimed in claim 1, it is characterized in that: described first connecting portion offers a rectangular fluting on high-frequency radiation part and the lateral margin away from base portion, and the end that second extension is connected with first connecting portion extends to form a convex extension part to first extension, one side.

4. multifrequency antenna as claimed in claim 1, it is characterized in that: described grounding parts evenly outwards extends in parallel side by side with second lateral margin behind the vertical extent from the second lateral margin other end of base portion and its ora terminalis again and is formed with the ground connection connecting portion, the end of ground connection connecting portion extends described grounding parts to the direction of base portion, and the end of ground connection connecting portion is provided with earth point.

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