CN201146239Y - multi-frequency antenna - Google Patents

Abstract

The utility model discloses a multifrequency antenna, it has a first antenna portion, and this first antenna portion has a rectangular section, and the one end of this rectangular section is outside extends perpendicularly again and extends in parallel with rectangular section and form a first radiation portion, and the other end of rectangular section is outside to extend perpendicularly and forms a second radiation portion. The elongated portion is extended outwardly to form a feeding portion adjacent to the second radiating portion, the end of the feeding portion is provided with a feeding point, and the end extends toward the first radiating portion to form a second antenna portion. The long strip portion adjacent to the feeding portion extends outward to form a grounding portion, and a grounding point is disposed at the end of the grounding portion. Through the design of the first antenna part and the second antenna part, the multi-frequency antenna can transmit and receive signals of GSM850, EGSM900, DSC1800, PSC1900 and W-CDMA 2100 frequency bands, has small volume and is suitable for being installed on a miniaturized handheld electronic product.

Description

multi-frequency antenna

technical field

The utility model relates to an antenna, in particular to a multi-frequency antenna suitable for being installed on hand-held electronic products.

Background technique

With the rapid development of communication technology and the increasing popularity of electronic products, people increasingly hope that the handheld electronic products they use can send and receive signals in different frequency bands. Therefore, dual-band or tri-band antennas are usually provided in handheld electronic products to realize the function of sending and receiving signals of different frequency bands.

Existing antennas include Dipole Antenna, Monopole Antenna, Patch Antenna, Planar Inverted-F Antenna and Loop Antenna, etc. Today's communication frequency bands include GSM850MHz, EGSM900MHz, DSC1800MHz, PSC1900MHz and W-CDMA2100MHz. The above-mentioned existing antennas generally can only transmit and receive signals in two or three frequency bands, and cannot cover other commonly used frequency bands. In addition, with the development trend of miniaturization of handheld electronic products, a multi-frequency antenna capable of transmitting and receiving signals of different frequency bands and suitable for installation on miniaturized handheld electronic products is more needed.

Utility model content

The purpose of this utility model is to provide a multi-frequency antenna capable of transmitting and receiving signals of different frequency bands and suitable for installation on miniaturized handheld electronic products in view of the above-mentioned defects in the prior art.

In order to achieve the above object, the multi-frequency antenna provided by the utility model includes a first antenna part, the first antenna part has a strip part, the strip part has a first edge, and one end of the first edge extends vertically outward Then extend parallel to the elongated portion to form a first radiating portion, and the other end of the first edge extends vertically outwards to form a second radiating portion; the first edge extends outwards adjacent to the second radiating portion with a feed-in portion, the feeder A feed-in point is provided at the end of the input portion; a second antenna portion extends from the end of the feed-in portion approximately toward the end of the first radiating portion; a ground portion extends outward from the first edge, the ground portion is adjacent to the feed-in portion, and the end of the ground portion A grounding point is provided.

As mentioned above, the two ends of the first antenna part are designed with a first radiating part and a second radiating part. The end of the radiation part is extended, so that the multi-frequency antenna of the utility model can send and receive signals in the frequency bands of GSM850, EGSM900, DSC1800, PSC1900 and W-CDMA2100 when used for wireless communication. At the same time, the first radiating part, the second radiating part and the second antenna part are arranged on the same side of the elongated part of the first antenna part, which can reduce the volume of the multi-frequency antenna, thereby making the utility model multi-frequency antenna easier to install In miniaturized handheld electronic products.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is described in further detail:

FIG. 1 is a structural schematic diagram of the multi-frequency antenna of the present invention.

Figure 2 is a voltage standing wave ratio (Voltage Standing WaveRatio, VSWR) test chart of the multi-frequency antenna shown in Figure 1.

The reference signs in the figure are explained as follows:

Multi-frequency antenna 1 first antenna part 10

Strip part 11 first edge 111

The first radiation part 12 the first open circuit end 121

The second radiation part 13 feed-in part 20

Feed point 21 Second antenna part 30

The second open circuit end 31 grounding part 40

Grounding point 41 Extension 42, 43

Bending part 44

Detailed ways

In order to describe the technical content, structural features, achieved goals and effects of the present invention in detail, specific embodiments are exemplified below and described in detail with reference to the drawings.

Please refer to Fig. 1, a kind of multi-frequency antenna 1 of the present utility model is made of metal material or forms by etching on circuit board, and it comprises a first antenna part 10, a feed-in part 20, the second antenna part 30 and a grounding Section 40.

The first antenna part 10 has a strip part 11 , and the strip part 11 has a first edge 111 . One end of the first edge 111 extends vertically outward for an appropriate distance and then extends parallel to the first edge 111 of the elongated portion 11 to form an "L"-shaped first radiating portion 12. The first radiating portion 12 is parallel to the first radiating portion 11. A portion of an edge 111 is overlapped with the strip portion 11 to reduce the volume of the multi-frequency antenna 1 , and the end of the first radiation portion 12 is defined as a first open end 121 . The other end of the first edge 111 of the elongated portion 11 extends vertically outward to form an elongated second radiating portion 13 .

The feed-in portion 20 is formed by extending outward from the first edge 111 adjacent to the second radiation portion 13 . A feed-in point 21 is provided at the end of the feed-in portion 20 , and a long-strip-shaped second strip parallel to the first edge 111 of the strip-shaped portion 11 extends from the end toward the first open-circuit end 121 of the first radiating portion 12 . The antenna part 30, the end of the second antenna part 30 is defined as the second open-circuit end 31, and the second open-circuit end 31 is close to the first open-circuit end 121, thereby generating a coupling effect to increase the connection between the second antenna part 30 and the first radiation part 11. electrical length.

The grounding portion 40 is formed by extending outward from the first edge 111 adjacent to the feeding portion 20 , and a grounding point 41 is disposed at an end thereof. The grounding portion 40 has two extending portions 42 , 43 parallel to the second radiating portion 13 and a bending portion 44 connected between the two extending portions. The bending portion 44 is roughly U-shaped and its opening faces the feed-in portion 20 , so that the ground portion 40 is bent to serve as a shunt inductor.

When the multi-frequency antenna 1 of the present invention is used for wireless communication, current is fed into the multi-frequency antenna 1 through the feed-in point 21 . When the current flows through the feeding part 20 and the strip part 11 to the first open end 121 of the first radiating part 12, the multi-frequency antenna 1 can resonate a low frequency within the frequency range of 850MHz to 900MHz due to the long route of the current flowing. signal; when the current flows to the second radiation part 13 through the feed-in part 20 and the strip part 11, the multi-frequency antenna 1 can resonate a high-frequency signal in the frequency range of 1710MHz to 2170MHz due to the short route of the current flow, And the frequency of the signal is closer to 1710MHz; and when the current flows from the feeding point 21 to the second open-circuit end 31 of the second antenna part 30, the multi-frequency antenna 1 can resonate a high frequency within the frequency range of 1710MHz to 2170MHz signal, and the frequency of the signal is closer to 2170MHz.

Please refer to Fig. 2, when the above-mentioned multi-frequency antenna 1 of the present invention works respectively at 0.824GHz (mark 1 in the figure), 0.960GHz (mark 2 in the figure), 1.710GHz (mark 3 in the figure) and 2.170GHz (marker 4 in the figure), its voltage standing wave ratio is respectively 3.0189, 3.1048, 1.4330, 2.9882, and the multi-frequency antenna 1 of the utility model meets the requirement that the voltage standing wave ratio is less than or close to 3.

As mentioned above, through the design of the first antenna part 10 and the second antenna part 30, when the multi-frequency antenna 1 of the present invention is used for wireless communication, it can send and receive low-band signals in GSM850, EGSM900 and DSC1800, PSC1900 and W- High band signal of CDMA2100. At the same time, the first radiating portion 12 and the second radiating portion 13 of the first antenna portion 10 and the second antenna portion 30 are arranged on the same side of the elongated portion 11 of the first antenna portion 10 to reduce the volume of the multi-frequency antenna 1 , so that the multi-frequency antenna 1 of the utility model can be more easily installed in miniaturized handheld electronic products.

Claims (6)

1. A multi-frequency antenna, characterized in that: comprise a first antenna portion, the first antenna portion has a strip portion, the strip portion has a first edge, and after one end of the first edge extends vertically outwards, Extending parallel to the elongated portion forms a first radiating portion, and the other end of the first edge extends vertically outwards to form a second radiating portion; the first edge extends outwards adjacent to the second radiating portion with a feed-in portion, and the feed-in portion The end is provided with a feed-in point; the end of the feed-in portion is approximately extended toward the end of the first radiating portion with a second antenna portion; the first edge extends outward with a ground portion, the ground portion is adjacent to the feed-in portion, and the end of the ground portion is provided with a grounding point. 2. The multi-frequency antenna according to claim 1, wherein the first radiating part is in an "L" shape. 3. The multi-frequency antenna according to claim 1, wherein the end of the second antenna part is close to and parallel to the end of the first radiating part. 4. The multi-frequency antenna according to claim 1, wherein the grounding portion is bent. 5. The multi-frequency antenna according to claim 4, wherein the grounding part has two extending parts parallel to the second radiating part and a bending part connected between the two extending parts, the bending part is opening toward The "U" shape of the feed-in part. 6 . The multi-frequency antenna according to claim 1 , wherein the part of the first radiating portion parallel to the elongated portion overlaps with the elongated portion. 7 .