CN201117801Y - Dual-frequency antenna - Google Patents

Abstract

The utility model provides a dual-frenquency antenna. The dual-band antenna includes a base and a feed. The base part is provided with a side edge, one end of the side edge extends outwards to form a grounding part, and the tail end of the grounding part extends to form a first radiation part. The feed-in part and the grounding part are arranged in parallel, one end of the feed-in part, which is far away from the side edge of the base part, extends to two opposite directions to form a second radiation part and a third radiation part respectively, and the tail end of the second radiation part is separated from the tail end of the first radiation part by a certain distance. Therefore, the first radiation part can resonate with the electromagnetic wave with the frequency of 2.4GHz to provide an additional resonance, so that the volume of the second radiation part for receiving and transmitting the electromagnetic wave with the frequency of 2.4GHz can be reduced, and the volume of the dual-frequency antenna is further reduced.

Description

dual frequency antenna

technical field

The utility model relates to a dual-frequency antenna, in particular to a dual-frequency antenna for a notebook computer.

Background technique

With the rapid development of communication technology, notebook computers have been widely used in daily work and life, especially notebook computers that can access wireless local area network (Wireless Local Area Network, WLAN) work are more and more popular among consumers. At present, most wireless local area networks adopt the Bluetooth (Bluetooth) technical standard or the IEEE802.11 series standard. The working frequency band of the antenna in the Bluetooth technical standard is 2.4GHz; the working frequency band of the antenna in the IEEE802.11 series standard is 2.4GHz and 5.2GHz, so the application Most of the antennas used in notebook computers can work in the 2.4GHz and 5.2GHz frequency bands.

Antennas used for notebook computers can be roughly divided into external antennas and built-in antennas. External antennas affect the appearance of notebook computers and are easily bent, deformed or even broken by external objects. Therefore, external antennas have gradually become Replaced by a built-in antenna. However, since the volume of the notebook computer is miniaturized day by day, the space available for installing the antenna in the notebook computer is also getting smaller and smaller, so designing a small built-in antenna for the notebook computer has become an urgent problem to be solved.

Utility model content

The purpose of the utility model is to provide a dual-frequency antenna with small volume.

To achieve the above purpose, the dual-frequency antenna of the present invention includes a base, a grounding portion, a feed-in portion, a first radiating portion, a second radiating portion and a third radiating portion. The base has a first side edge, one end of the first side edge extends outward perpendicular to the first side edge to form the grounding portion, and one end of the grounding portion connected to the base is provided with a grounding point; the grounding portion The other end extends perpendicularly to the ground portion to form the first radiation portion. The feed-in portion is arranged parallel to the ground portion, and a feed-in point is provided at one end of the feed-in portion adjacent to the base; the end of the feed-in portion away from the base is perpendicular to the feed-in portion and extends toward the first radiating portion to form the second The radiating part, the end of the second radiating part is separated from the end of the first radiating part by a gap. An end of the feeding portion extending from the second radiating portion extends in a direction opposite to the extending direction of the second radiating portion to form the third radiating portion.

As mentioned above, the dual-frequency antenna of the present invention provides an additional resonance by setting the end of the first radiating part adjacent to the end of the second radiating part so that the first radiating part resonates an electromagnetic wave with a frequency of 2.4 GHz. The volume of the second radiating part for transmitting and receiving electromagnetic wave signals with a frequency of 2.4 GHz can be reduced, thereby reducing the volume of the dual-frequency antenna.

Description of drawings

In the accompanying drawings of the manual:

FIG. 1 is a schematic structural diagram of an embodiment of the dual-frequency antenna of the present invention.

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

Dual Band Antenna 1 Base 10

First side edge 11 Second side edge 12

Extension 13 Grounding 20

Grounding point 21 The first radiation part 30

Feed-in part 40 Feed-in point 41

The second radiation department 50 The third radiation department 60

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 dual-frequency antenna 1 of the present invention is formed by etching copper foil on a printed circuit board. An edge 11 and a second edge 12 vertically connected to the first edge 11. One end of the second side edge 12 adjacent to the first side edge 11 extends outward perpendicular to the second side edge 12 with an extension portion 13 . An end of the first side edge 11 adjacent to the extension portion 13 extends outward perpendicular to the first side edge 11 with a grounding portion 20 , and an end of the grounding portion 20 connected to the base 10 is provided with a grounding point 21 . A first radiation portion 30 parallel to the first side edge 11 extends from the end of the ground portion 20 along a direction opposite to the extension direction of the extension portion 13 .

A feed-in portion 40 is disposed parallel to the ground portion 20 , and the feed-in portion 40 is adjacent to the first side edge 11 of the base portion 10 away from an end extending from the ground portion and is separated from the first side edge 11 by a gap. A feeding point 41 is disposed at one end of the feeding portion 40 adjacent to the base portion 10 .

One end of the feed-in portion 40 away from the base 10 is perpendicular to the feed-in portion 40 and extends toward the first radiating portion 30 with a second radiating portion 50 having a width approximately equal to that of the first radiating portion 30 . The second radiating portion 50 The end of the second radiating portion 30 is opposite to the end of the first radiating portion 30, so that the two sides of the second radiating portion 50 are substantially flush with the two sides of the first radiating portion 30, and the end of the second radiating portion 50 is aligned with the first radiating portion. A gap is formed between the ends of 30 . One end of the feeding part 40 extending from the second radiating part 50 extends away from the first radiating part 30 with a third radiating part 60 having the same width as the second radiating part 50 and a length shorter than that of the second radiating part 50 .

When the dual-frequency antenna 1 of the utility model is used for communication, the second radiation part 50 resonates an electromagnetic wave with a frequency of 2.4 GHz. Since the end of the first radiation part 30 is adjacent to the end of the second radiation part 50, the first radiation part 30 also An additional electromagnetic wave with a frequency of 2.4 GHz is resonated, thereby increasing the sensitivity of the second radiation part 50 to send and receive electromagnetic wave signals with a frequency of 2.4 GHz. The third radiation part 60 resonates with the electromagnetic wave with the frequency of 5.2 GHz to transmit and receive the electromagnetic wave signal with the frequency of 5.2 GHz.

As mentioned above, the dual-frequency antenna 1 of the present utility model is arranged adjacent to the end of the first radiating part 30 and the end of the second radiating part 50, so that the first radiating part 30 resonates an electromagnetic wave with a frequency of 2.4 GHz to provide an additional Resonance, so that the volume of the second radiation part 50 that transmits and receives electromagnetic wave signals with a frequency of 2.4 GHz can be reduced, thereby reducing the volume of the dual-band antenna 1 .

Claims (4)

1. A dual-frequency antenna, the dual-frequency antenna has a base; it is characterized in that: the base has a first side edge; one end of the first side edge extends outward perpendicular to the first side edge with a grounding portion , and the grounding part is connected to one end of the base with a grounding point; the other end of the grounding part extends perpendicular to the grounding part with a first radiation part; a feed-in part is arranged in parallel with the ground part, and the feed-in part is adjacent to the base One end is provided with a feed-in point; the end of the feed-in portion away from the base portion is perpendicular to the feed-in portion and extends toward the first radiating portion with a second radiating portion, the end of the second radiating portion is spaced from the end of the first radiating portion by a gap; One end of the feed-in portion extending from the second radiating portion extends in a direction opposite to the extending direction of the second radiating portion with a third radiating portion. 2 . The dual-band antenna according to claim 1 , characterized in that: one end of the feed-in part provided with a feed-in point is spaced from the first side edge of the base by a gap. 3 . The dual-band antenna according to claim 2 , wherein the feed-in portion is disposed at an end of the first side edge of the base portion away from the extending ground portion. 4 . 4. The dual-band antenna according to claim 3, characterized in that: the base part also has a second side edge connected to the first side edge, and one end of the second side edge adjacent to the grounding part is perpendicular to the second side edge An extension portion extends outward from the side edge.

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