CN201682057U - Multi-frequency antenna - Google Patents

Abstract

A multi-frequency antenna, comprising: a grounding part; a monopole antenna, which has a first part and a second part, one end of the first part is connected to the second part, and the other end of the first part has a feed-in part, two ends of the second part are respectively a first radiation end and a second radiation end, and the frequency band range of the first radiation end is different from the frequency band range of the second radiation end; and a parasitic line, the parasitic line has a third portion and a fourth portion, the third portion is adjacent to the second portion, and the third portion has a third radiation end, one end of the fourth portion is connected to one end of the third portion, the other end of the fourth portion is connected to the grounding portion, wherein the frequency band range of the third radiation end is different from the frequency band range of the first radiation end and the second radiation end, so as to achieve the purpose that the antenna has multi-frequency transceiving capability.

Description

multi-frequency antenna

technical field

The utility model relates to an antenna, in particular to a multi-frequency antenna structure.

Background technique

With the development of wireless communication technology, users can use wireless communication systems to transmit information without being restricted by terrain, making electronic products using wireless communication technology, such as notebook computers, mobile phones, personal digital assistants, The number and types of portable electronic devices such as PDAs are increasing day by day, and antennas for transmitting and receiving electromagnetic waves have become one of the most important components in wireless communication devices.

Taking notebook computers as an example, in order to meet the current purchasing trend of consumers, all notebook computers on the market are designed and developed towards thinner and lighter designs. Therefore, the size of the antenna used for transmitting and receiving wireless electromagnetic wave signals must be relatively reduced in size, or its structure must be changed, so that the antenna can be smoothly arranged in the limited space inside the notebook computer.

At present, the existing antennas are roughly divided into various types of antenna devices such as Planar Inverted-F Antenna (PIFA), Monopole Antenna (Monopole Antenna) and Loop Antenna (Loop Antenna). The current protocols include GSM850, GSM900, DCS1800, PCS1900, WCDMA2000, etc. However, although the above-mentioned various antennas can be successfully loaded in thin and light portable electronic devices, they cannot have the ability of multi-frequency transmission and reception because the antennas are reduced in size or changed in shape.

At present, High Speed Download Packet Access (HSDA), commonly known as the 3.5th generation (3.5G) communication technology has gradually entered the 4th generation (4G) communication technology, and the long term evolution technology (1ong term evolution, LTE) is a new generation of mobile wireless broadband technology that has attracted much attention in the market, and has become the preferred technology in the field of 4G communication. However, the existing various types of antenna devices only have the function of dual-band transceiver or triple-band transmission/reception of electromagnetic wave signals, which cannot meet the communication frequency bands of the current 4G communication field, and are still limited in use.

Utility model content

In view of the above problems, the present invention provides a multi-frequency antenna to improve the existing various types of antennas that do not have the capability of multi-frequency transmission and reception, and thus cannot meet the requirements of today's 4G communication technology.

The utility model discloses a multi-frequency antenna, which includes a grounding part, a monopole antenna, and a parasitic circuit. The monopole antenna has a first part and a second part, wherein one end of the first part is connected to the second part, and the other end of the first part has a feeding part, and the two ends of the second part are the first radiation ends respectively and the second radiation end. The parasitic circuit has a third part and a fourth part, the third part is adjacent to the second part, and the third part has a third radiation end, one end of the fourth part is connected to one end of the third part, and the other end of the fourth part One end is connected to the ground part, wherein the frequency band ranges of the first radiation end, the second radiation end, and the third radiation end are different from each other.

The multi-frequency antenna of the present invention can also be extended to be designed as a short-circuit monopole antenna mode, which includes the third, fourth, fifth, and sixth parts. The fourth part is the short-circuit line of the short-circuit monopole antenna, and one end of the fifth part is connected to the third part of the parasitic circuit, one end of the sixth part is connected to the other end of the fifth part, and the other end of the sixth part Adjacent to the grounding portion, the frequency range of the short-circuited monopole antenna is different from the frequency ranges of the first radiation end, the second radiation end, and the third radiation end.

The multi-frequency antenna of the present invention may also include a base plate, on which the grounding part, the monopole antenna, and the parasitic circuit are formed.

The multi-frequency antenna of the present invention may also include a substrate, on which the grounding part, the monopole antenna, the parasitic circuit, and the short-circuit monopole antenna are formed.

The multi-frequency antenna of the present invention may also include a cable with a core wire connected to the feed-in portion of the monopole antenna.

In the multi-frequency antenna of the present invention, the grounding part can be a thin metal sheet.

The effect of the utility model is that the two monopole antennas in the resonant mode are arranged in an adjacent manner, and at least three radiation parts with different frequency band ranges are formed, so that the antenna of the utility model has the ability of multi-frequency transmission and reception to meet Today's 4G communication technology needs.

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the utility model.

Description of drawings

Fig. 1 is the plane plan view of the first embodiment of the utility model;

Fig. 2 is a plane top view of the second embodiment of the present invention; and

FIG. 3 is a numerical distribution diagram of the voltage standing wave ratio (VSWR) of the multi-frequency antenna of the present invention.

Among them, reference signs

100 multi-frequency antenna

110 Substrate

120 ground part

130 monopole antenna

131 First part

1311 Feeding Department

132 Second part

1321 The first radiation end

1322 The second radiation end

140 parasitic lines

141 The third part

1411 The third radiation terminal

142 The fourth part

150 cable

151 core wire

160 short-circuit monopole antenna

161 fifth part

1611 The fourth radiation terminal

162 Sixth part

Detailed ways

Below in conjunction with accompanying drawing, structural principle and working principle of the present utility model are specifically described:

Fig. 1 is a plane top view of the first embodiment of the utility model. As shown in the figure, the multi-frequency antenna 100 of the first embodiment of the present invention is installed inside a portable electronic device (not shown), such as a notebook computer, for receiving wireless electromagnetic wave signals. The multi-frequency antenna 100 includes a substrate 110 , a ground portion 120 , a monopole antenna 130 , parasitic lines 140 , and a cable 150 . The substrate 110 can be an FR4 glass fiber board as a carrier of the multi-band antenna 100 , but it is not limited thereto. The grounding part 120 is formed on the substrate 110, and the grounding part 120 is a thin metal sheet whose material can be aluminum metal or copper metal, but is not limited to the shape and material disclosed in this embodiment.

The monopole antenna 130 and the parasitic circuit 140 are formed on the substrate 110, and the material thereof can be a metal material. The monopole antenna 130 has a first part 131 and a second part 132, and one end of the first part 131 is connected on the second part 132, so that the monopole antenna 130 roughly forms a T-shaped structure, and at the first part 131 The other end has a feed-in portion 1311 . The cable 150 can be a radio frequency cable (RF cable), but not limited thereto. The cable 150 has a core wire 151 connected to the feed-in portion 1311 of the first part 131 . The two opposite ends of the second part 132 are the first radiation end 1321 and the second radiation end 1322 respectively, and the frequency band ranges of the wireless electromagnetic wave signals received by the first radiation end 1321 and the second radiation end 1322 are different.

Please continue to refer to FIG. 1, the parasitic circuit 140 has a third portion 141 and a fourth portion 142, wherein the third portion 141 is adjacent to the second portion 132 of the monopole antenna 130, and the third portion 141 and the second portion 132 are in the same shape facing each other. The third portion 141 has a third radiating end 1411 , and the frequency band range of the wireless electromagnetic wave signal received by the third radiating end 1411 is different from that of the first radiating end 1321 and the second radiating end 1322 .

One end of the fourth portion 142 is connected to an end of the third portion 141 away from the monopole antenna 130 , and the fourth portion 142 and the monopole antenna 130 are facing each other, so that the parasitic line 140 roughly forms an inverted F-shaped structure. The other end of the fourth portion 142 is connected to the ground portion 120 , so that the fourth portion 142 is used as a ground end.

FIG. 2 is a plan view of the second embodiment of the present invention. As shown in the figure, the multi-frequency antenna 100 of the second embodiment of the present invention is installed inside a portable electronic device (not shown in the figure), such as a notebook computer (notebook computer), for receiving wireless electromagnetic wave signals . The multi-frequency antenna 100 of the second embodiment is similar to the first embodiment, except that it includes a substrate 110, a ground portion 120, a monopole antenna 130, a parasitic line 140, and a cable 150, the second embodiment The multi-band antenna 100 also includes a short-circuit monopole antenna 160 .

The substrate 110 can be an FR4 glass fiber board as a carrier of the multi-band antenna 100 , but it is not limited thereto. The grounding part 120 is formed on the substrate 110, and the grounding part 120 is a thin metal sheet whose material can be aluminum metal or copper metal, but is not limited to the shape and material disclosed in this embodiment.

The monopole antenna 130 , the parasitic circuit 140 , and the short-circuit monopole antenna 160 are all formed on the substrate 110 , and the material thereof can be a metal material. The monopole antenna 130 has a first part 131 and a second part 132, and one end of the first part 131 is connected on the second part 132, so that the monopole antenna 130 roughly forms a T-shaped structure, and at the first part 131 The other end has a feed-in portion 1311 . The cable 150 can be a radio frequency cable (RF cable), but not limited thereto. The cable 150 has a core wire 151 connected to the feed-in portion 1311 of the first part 131 . The two opposite ends of the second part 132 are the first radiation end 1321 and the second radiation end 1322 respectively, and the frequency band ranges of the wireless electromagnetic wave signals received by the first radiation end 1321 and the second radiation end 1322 are different.

Please continue to refer to FIG. 2, the parasitic circuit 140 has a third portion 141 and a fourth portion 142, wherein the third portion 141 is adjacent to the second portion 132 of the monopole antenna 130, and the third portion 141 and the second portion 132 are in the same shape facing each other. The third portion 141 has a third radiating end 1411 , and the frequency band range of the wireless electromagnetic wave signal received by the third radiating end 1411 is different from that of the first radiating end 1321 and the second radiating end 1322 .

One end of the fourth portion 142 is connected to an end of the third portion 141 away from the monopole antenna 130 , and the fourth portion 142 and the monopole antenna 130 are facing each other, so that the parasitic circuit 140 roughly forms an inverted F-shaped structure. The other end of the fourth portion 142 is connected to the ground portion 120 , so that the fourth portion 142 is used as a ground end.

The short-circuit monopole antenna 160 has a fifth part 161 and a sixth part 162, wherein the fifth part 161 has a fourth radiating end 1611, and the fourth radiating end 1611 is connected to the first radiating end 1321 and the second radiating end 1322 , and the frequency band ranges of the wireless electromagnetic wave signals received by the third radiation end 1411 are different. One end of the fifth portion 161 is connected to an end of the third portion 141 of the parasitic line 140 away from the monopole antenna 130 , so that the monopole antenna 130 and the short-circuit monopole antenna 160 are respectively disposed on two sides of the parasitic line 140 . One end of the sixth part 162 is connected to the other end of the fifth part 161, and the sixth part 162 and the fourth part 142 of the parasitic line 140 are facing each other, so that the short-circuit monopole antenna 160 roughly forms an inverted F-shaped structure . The other end of the sixth portion 162 is adjacent to the ground portion 120 and is not connected to the ground portion 120 .

FIG. 3 is a numerical distribution diagram of the voltage standing wave ratio (VSWR) after the test of the multi-frequency antenna of the present invention. The first point in Figure 3 is about 0.74 gigahertz (GHz), the second point is about 0.96 gigahertz (GHz), the third point is about 1.71 gigahertz (GHz), and the fourth point is about 2.69 gigahertz (GHz ). It can be clearly seen from the figure that the multi-frequency antenna of the present invention can receive frequency bands ranging from 700 megahertz (MHz) to 2700 megahertz (MHz) through the combination of monopole antenna, parasitic line, and short-circuit monopole antenna The wireless electromagnetic wave signal proves that the multi-frequency antenna of the present invention does have the ability of multi-frequency transmission and reception.

The following Table 1 is the antenna characteristic gain table of the multi-frequency antenna of the present invention during the actual test.

Form 1

It can be proved from Table 1 that the gain value of the multi-frequency antenna of the present invention is quite good and there is no problem when used in different frequency ranges.

At least two monopole antennas of the multi-frequency antenna of the present invention are arranged adjacent to the parasitic line, and at least three radiation parts with different frequency bands are formed, so that the antenna of the present invention has good multi-frequency transceiver capability, and can Fully meet the needs of today's 4G communication technology.

Of course, the utility model can also have other various embodiments, and those skilled in the art can make various corresponding changes and deformations according to the utility model without departing from the spirit and essence of the utility model, but These corresponding changes and deformations should all belong to the protection scope of the appended claims of the present utility model.

Claims (6)

1. a multifrequency antenna is characterized in that, includes:

One grounding parts;

One unipole antenna, this unipole antenna has one first position and one second position, one end at this first position is connected in this second position, and the other end at this first position has a feeding portion, the two ends at this second position are respectively one first spoke side and one second spoke side, and the frequency band range of the frequency band range of this first spoke side and this second spoke side is different; And

One parasitic circuit, this parasitism circuit has one the 3rd position and one the 4th position, the 3rd position is adjacent to this second position, and the 3rd position has one the 3rd spoke side, one end at the 4th position is connected in an end at the 3rd position, the other end at the 4th position is connected with this grounding parts, and wherein the frequency band range of the frequency band range of the 3rd spoke side and this first spoke side and this second spoke side is different.

2. multifrequency antenna according to claim 1, it is characterized in that, also include a short circuit type unipole antenna, have one the 5th position and one the 6th position, the 5th position has one the 4th spoke side, and an end at the 5th position is connected with the 3rd position of this parasitism circuit, one end at the 6th position is connected in the other end at the 5th position, the other end at the 6th position is adjacent to this grounding parts, wherein the frequency band range of the 4th spoke side and this first spoke side, this second spoke side, and the frequency band range of the 3rd spoke side different.

3. multifrequency antenna according to claim 2 is characterized in that, also includes a substrate, this grounding parts, this unipole antenna, this parasitism circuit, and this short circuit type unipole antenna be formed on this substrate.

4. multifrequency antenna according to claim 1 is characterized in that, also includes a substrate, this grounding parts, this unipole antenna, and this parasitism circuit be formed on this substrate.

5. multifrequency antenna according to claim 1 is characterized in that, also includes a cable, and this cable has a heart yearn, is connected in this feeding portion of this unipole antenna.

6. multifrequency antenna according to claim 1 is characterized in that, this grounding parts is a sheet metal.

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