CN201247815Y - Multi-frequency antenna - Google Patents

Abstract

The utility model discloses a multi-frequency antenna, which includes a substrate, wherein the substrate has a first edge, a second edge, a third edge and a fourth edge. One end of the first edge protrudes to form a feed-in portion, and the other end of the first edge protrudes to form a grounding portion. The second edge protrudes and bends to form a first radiating portion. The third edge protrudes and bends to form a second radiating portion and a third radiating portion. The multi-frequency antenna of the utility model can realize the function of receiving and transmitting electromagnetic wave signals covering communication systems such as GSM850, GSM900, DCS1800, PCS1900 and WCDMA through the above-mentioned structural arrangement.

Description

multi-frequency antenna

technical field

The utility model relates to an antenna, in particular to a multi-frequency antenna applied to electronic products such as portable computers.

Background technique

With the continuous development of wireless communication technology, various wireless communication protocols are introduced continuously, and electronic products begin to integrate more and more wireless communication functions.

The realization of the wireless communication function of electronic products requires the installation of antennas that can send and receive wireless electromagnetic wave signals. China Taiwan Patent No. M322637 published on November 21, 2007 discloses a multi-frequency antenna, which can send and receive electromagnetic wave signals of GSM900, DCS1800 and PCS1900 communication systems.

However, the frequency bands of electromagnetic waves transmitted and received by the above-mentioned multi-frequency antenna are still difficult to meet the needs of current wireless communication of electronic products.

Utility model content

The purpose of this utility model is to provide a multi-frequency antenna capable of transmitting and receiving electromagnetic wave signals of various frequency bands in view of the above-mentioned deficiency of the background technology.

To achieve the above object, the multi-frequency antenna provided by the present invention includes a substrate, and the substrate has a first edge, a second edge, a third edge and a fourth edge. One end of the first edge protrudes to form a feed-in portion, and the other end of the first edge protrudes to form a grounding portion. The second edge protrudes and bends to form a first radiation portion. The third edge protrudes and bends to form a second radiating portion and a third radiating portion.

From the above, the multi-frequency antenna of the present invention can realize transceiving covering GSM850, GSM900, DCS1800, PCS1900 and The electromagnetic wave signal of communication systems such as WCDMA can meet the needs of wireless communication of today's electronic products.

Description of drawings

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

The reference signs of each component in the figure are explained as follows:

Multi-frequency antenna 100 substrate 10

First Edge 11 Second Edge 12

Third Edge 13 Fourth Edge 14

Feed-in part 20 Feed-in point 21

Grounding part 30 Grounding point 31

Grooving 40 The first radiation part 50

First extension 51 Second extension 52

The second radiation part 60 The third extension part 61

First groove 611 Fourth extension 62

Second groove 621 Fifth extension 63

Side groove 631, 641 Sixth extension 64

The third radiation department 70 The seventh extension department 71

Eighth Extension 72 Ninth Extension 73

Detailed ways

In order to illustrate the technical content, structural features, achieved goals and effects of the present utility model in detail, the following examples are given in detail with accompanying drawings.

Please refer to FIG. 1 , the multi-frequency antenna 100 of the present invention includes a rectangular plate-shaped substrate 10 . The substrate 10 has a first edge 11, a second edge 12, a third edge 13 and a fourth edge 14, wherein the first edge 11 is opposite to the second edge 12, and the third edge 13 is opposite to the fourth edge 14 .

A rectangular plate-shaped feed-in portion 20 protrudes upward from the left end of the first edge 11 of the substrate 10 , and a feed-in point 21 is provided at an upper end of the feed-in portion 20 . A rectangular plate-shaped grounding portion 30 protrudes upward from a right end of the first edge 11 , and a grounding point 31 is disposed on an upper end of the grounding portion 30 . A slot 40 is formed between the grounding part 30 and the feeding part 20, and the slot 40 makes the grounding part 30 and the feeding part 20 form a parallel analog inductance, which can adjust the input impedance of the utility model multi-frequency antenna 100, The input impedance of the multi-frequency antenna 100 can be matched with the characteristic impedance of the feeder to reduce the return loss, thereby improving the transceiving performance and efficiency of the multi-frequency antenna 100 of the present invention.

The second edge 12 of the substrate 10 protrudes and bends to form a first radiation portion 50 . The first radiating portion 50 has a first extension portion 51 protruding downward from the left end of the second edge 12, extending rightward along a direction parallel to the second edge 12, and then bending upward. The end of the 51 extends leftwards and then bends upwards along a direction parallel to the fourth edge 14 to form a second extension 52 . The second extension 52 is located on the right side of the substrate 10 .

The third edge 13 of the substrate 10 protrudes and bends to form a second radiation portion 60 . The second radiating part 60 has an "L"-shaped third extension part 61 that protrudes from the lower end of the third edge 13 of the substrate 10 to the left and then bends upwards, so that the gap between the third extension part 61 and the substrate 10 A first groove 611 is formed. The end of the third extension portion 61 protrudes to the left and then bends upward to form an “L”-shaped fourth extension portion 62 , so that a second groove 621 is formed between the fourth extension portion 62 and the substrate 10 . A plate-shaped fifth extending portion 63 protrudes leftward from the end of the fourth extending portion 62 , and a side groove 631 is defined in the middle of the upper end of the fifth extending portion 63 . A sixth extending portion 64 protrudes downward from the fifth extending portion 63 . A side groove 641 is defined at the right end of the sixth extension portion 64 adjacent to the fifth extension portion 63 . The side groove 641 (631) is mainly used to avoid the internal structure of the electronic product, so as to assemble the multi-frequency antenna 100 of the present utility model inside the electronic product; the side groove 641 (631) can also increase the electrical length of the second radiation part 60 , so as to realize the electrical length of the second radiating portion 60 while reducing its space occupation.

The third edge 13 of the substrate 10 protrudes and bends to form a third radiation portion 70 . The third radiating portion 70 has an “L”-shaped seventh extending portion 71 protruding from approximately the middle of the third edge 13 to the left and then bent upwards. The seventh extending portion 71 is located in the first groove 611 Inside. The end of the seventh extension portion 71 protrudes to the left and then bends upwards to form an “L”-shaped eighth extension portion 72 . The lower end of the eighth extension portion 72 is located in the first groove 611 . The end of the eighth extending portion 72 protrudes to the left, then bends upwards and extends rightward to form a ninth extending portion 73 , the lower end of the ninth extending portion 73 is located in the second groove 621 .

The total electrical length of the substrate 10, the feed-in portion 20, the ground portion 30, and the first radiation portion 50 of the multi-frequency antenna 100 of the present utility model is approximately equal to a quarter wavelength of the electromagnetic wave with a frequency of 1940 MHz; the substrate 10, the feed-in portion 20, the ground portion The total electrical length of 30 and the second radiating part 60 is approximately equal to a quarter wavelength of the electromagnetic wave with a frequency of 900 MHz; the total electrical length of the substrate 10, the feeding part 20, the grounding part 30 and the third radiating part 70 is approximately equal to the electromagnetic wave with a frequency of 1940 MHz a quarter wavelength.

When the multi-frequency antenna 100 of the utility model communicates, the substrate 10, the feed-in part 20, the grounding part 30 and the first radiation part 50 resonate with the electromagnetic wave with a frequency of 1940 MHz to send and receive electromagnetic wave signals of DCS1800, PCS1900 and WCDMA communication systems, and the emphasis is on Transmit and receive electromagnetic wave signals of WCDMA communication system. The substrate 10 , the feeding part 20 , the grounding part 30 and the second radiation part 60 resonate with the electromagnetic wave with a frequency of 900 MHz to transmit and receive electromagnetic wave signals of the GSM850 and GSM900 communication systems. The substrate 10, the feeding part 20, the grounding part 30 and the third radiating part 70 resonate with the electromagnetic wave with a frequency of 1940MHz to transmit and receive electromagnetic wave signals of DCS1800, PCS1900 and WCDMA communication systems, and focus on the transmission and reception of electromagnetic wave signals of the DCS1800 communication system.

The multi-frequency antenna 100 of the utility model can be manufactured by the flexible circuit board process, so as to utilize the flexible printed circuit board's strong deflection and deformation ability, the multi-frequency antenna 100 can be arranged according to the spatial layout requirements of electronic products, which can save space and Adapt to the development trend of miniaturization of electronic products today. When the multi-frequency antenna 100 is assembled into an electronic product, it can be pasted inside the electronic product with an adhesive, which is convenient for assembly. Moreover, printing the multi-frequency antenna 100 on the flexible circuit board can improve its heat dissipation, so that it can maintain a stable working state.

From the above, the multi-frequency antenna 100 of the present invention can realize the transmission and reception covering GSM850 through the structural arrangement of the substrate 10, the feeding part 20, the grounding part 30, the first radiating part 50, the second radiating part 60 and the third radiating part 70. , GSM900, DCS1800, PCS1900 and WCDMA and other communication systems of electromagnetic wave signals, which can meet the wireless communication needs of today's electronic products.

In addition, the multi-frequency antenna 100 of the present utility model has a simple structure and occupies a small space, and adapts to the development trend of miniaturization of electronic products today.

Claims (8)

1. multifrequency antenna, it is characterized in that: comprise a substrate, this substrate has one first edge, one second edge, one the 3rd edge and one the 4th edge, one end at first edge protrudes out and is formed with a feeding portion, the other end at first edge protrudes out and is formed with a grounding parts, second edge protrudes out and has been bent to form one first Department of Radiation, and the 3rd edge protrudes out and be bent to form one second Department of Radiation and one the 3rd Department of Radiation.

2. multifrequency antenna according to claim 1 is characterized in that: first edge of described substrate is relative with second edge, and the 3rd edge is relative with the 4th edge, is formed with a fluting between described feeding portion and the described grounding parts.

3. multifrequency antenna according to claim 1, it is characterized in that: described first Department of Radiation has second an edge left end from described substrate and protrudes out downwards more to the right and extend first extension that upwards bending extends to form along the direction that is parallel to this second edge again, and the end of this first extension extends the direction bending that is parallel to described the 4th edge to the upper edge left again and extended to form one second extension.

4. multifrequency antenna according to claim 1, it is characterized in that: described second Department of Radiation has a lower end, the 3rd edge from described substrate and protrudes out the 3rd extension that upwards bending extension forms left again, the end of the 3rd extension protrudes out upwards bending left again and has extended to form one the 4th extension, the end of the 4th extension has protruded out one the 5th extension left, and the 5th extension has protruded out one the 6th extension downwards.

5. multifrequency antenna according to claim 4 is characterized in that: offer groove on one side on described the 5th extension and the 6th extension respectively.

6. multifrequency antenna according to claim 1, it is characterized in that: described the 3rd Department of Radiation has a center from the 3rd edge of described substrate and protrudes out upwards bending left again and extend the 7th extension that forms, the end of the 7th extension protrudes out upwards bending left again and has extended to form one the 8th extension, and the bending that makes progress after the end of the 8th extension protrudes out is left extended bending to the right again and extended to form one the 9th extension.

7. multifrequency antenna according to claim 1 is characterized in that: the upper end of described feeding portion is provided with a load point.

8. multifrequency antenna according to claim 1 is characterized in that: the upper end of described grounding parts is provided with an earth point.

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