CN2706884Y

CN2706884Y - Multi-frequency aerial

Info

Publication number: CN2706884Y
Application number: CN 200420025104
Authority: CN
Inventors: 林宪助; 戴隆盛; 洪振达
Original assignee: Foxconn Kunshan Computer Connector Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Foxconn Kunshan Computer Connector Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2004-03-01
Filing date: 2004-03-01
Publication date: 2005-06-29
Anticipated expiration: 2014-03-01

Abstract

The utility model discloses a multi-frequency aerial, comprising a radiating part, a ground part, and a coaxial cable connecting the radiating part and the ground part, wherein the radiating part comprises a first radiating part, a second radiating part and a third radiating part. A first planar inverted F shape aerial is composed of the first radiating part, the second radiating part, the ground part and the coaxial cable, and a loop aerial is composed of the first radiating part, the ground part and the coaxial cable. A second planar inverted F shape aerial is composed of the first radiating part, the third radiating part, the ground part and the coaxial cable. The second planar inverted F shape aerial works in lower frequency range, and the first planar inverted F shape aerial and the loop aerial work in higher frequency range. The first planar inverted F shape aerial and the loop aerial can work in the same frequency range and also work in different frequency ranges. The multi-frequency aerial of the utility model can not only reduce the volume of the aerial but also can increase the working frequency bandwidth, and enlarge using occasion of the aerial.

Description

Multifrequency antenna

[technical field]

The utility model is about a kind of multifrequency antenna, refers to a kind of multifrequency antenna that is used in the electronic equipment especially.

[background technology]

At present, the communication product on the market has the trend of microminiaturization gradually, as the microminiaturization of mobile phone.And communication product is also integrated with other electronic product gradually, for example, communication device is located at notebook computer, personal digital assistant etc.

Along with the microminiaturization of communication device, inevitably, Antenna Design also must corresponding microminiaturization.And the solution of antenna microminiaturization in the middle of prior art, has become ripe development field.For example microstrip antenna, planar inverted F-shape antenna or the like are in response to the antenna microminiaturization and develop the technology that.

December in 2003, the disclosed U.S. on the 4th publication disclosed a kind of dual-band antenna that is used on the notebook computer for 2003/0222823A1 number, saw also shown in Figure 1.This dual-band antenna 700 is made by offer the cell body design at the notebook computer screen edge, it comprises first radiating element, second radiating element, wherein first radiating element comprises that first radiant body 702 and second radiant body, 703, the second radiating elements comprise the 3rd radiant body 704 and the 4th radiant body 708.First radiating element is connected with grounding parts 701 with second radiating element.Coaxial cable 706 is the feeder line of this double frequency band aerial.The inner conductor 705 of coaxial cable 706 and first radiating element electrically connect, and the braid conductor 707 of coaxial cable 706 electrically connects with grounding parts 701.

Though the design of this dual-band antenna can reach antenna volume microminiaturization and can be in the purpose of different frequency range work, but above-mentioned double frequency band aerial second radiating element does not adopt coaxial cable FD feed mode and adopts the coupled modes FD feed, and such design will cause antenna gain to reduce.When above-mentioned in addition dual-band antenna was operated in high band, its frequency bandwidth was narrower, so then can limit the use occasion of antenna.

[utility model content]

The purpose of this utility model is to provide a kind of and can works under multiple frequency range and the multifrequency antenna of frequency band broad.

The purpose of this utility model is achieved through the following technical solutions: the utility model multifrequency antenna is used for electronic equipment, comprises Department of Radiation, grounding parts and is connected Department of Radiation and the coaxial cable of grounding parts.Wherein Department of Radiation comprises first Department of Radiation, second Department of Radiation and the 3rd Department of Radiation.First Department of Radiation, second Department of Radiation, grounding parts and coaxial cable constitute first planar inverted F-shape antenna.First Department of Radiation, grounding parts and coaxial cable looping antenna.First Department of Radiation, the 3rd Department of Radiation, grounding parts and coaxial cable constitute second planar inverted F-shape antenna.

Compared with prior art, the utility model multifrequency antenna can utilize the existing metal plate-like of electronic equipment portion to offer cell body and make two planar inverted F-shape antennas and a loop aerial, make a planar inverted F-shape antenna and loop aerial co-operation at high band, can increase the frequency bandwidth of antenna work by such design.

[description of drawings]

Fig. 1 is the vertical view of existing multifrequency antenna.

Fig. 2 is the vertical view of the utility model multifrequency antenna.

Fig. 3 is voltage standing wave(VSW) (Voltage Standing Wave Radio, the VSWR) resolution chart of the utility model multifrequency antenna.

Fig. 4 is the electromagnetic radiation field pattern of the utility model multifrequency antenna X-Y horizontal polarization when being operated in 2.4GHz～2.5GHz frequency.

Fig. 5 is the electromagnetic radiation field pattern of the utility model multifrequency antenna X-Y perpendicular polarization when being operated in 2.4GHz～2.5GHz frequency.

Fig. 6 is the electromagnetic radiation field pattern of the utility model multifrequency antenna X-Y horizontal polarization when being operated in 5.15GHz～5.35GHz frequency.

Fig. 7 is the electromagnetic radiation field pattern of the utility model multifrequency antenna X-Y perpendicular polarization when being operated in 5.15GHz～5.35GHz frequency.

Fig. 8 is the electromagnetic radiation field pattern of the utility model multifrequency antenna X-Y horizontal polarization when being operated in 5.725GHz～5.875GHz frequency.

[embodiment]

See also shown in Figure 2ly, the utility model multifrequency antenna 1 is assembled in the electronic equipment in order to receive or to transmit, and in the present embodiment, this electronic equipment is notebook computer (not shown).Above-mentioned multifrequency antenna 1 is offered cell body (not label) by the support that links to each other with casing in the inner LCDs of notebook computer and is made into integration multifrequency antenna 1.Multifrequency antenna 1 comprises grounding parts 2, Department of Radiation 3 and is connected the coaxial cable 4 of Department of Radiation 3 and grounding parts 2.

Department of Radiation 3 comprises that first Department of Radiation 30, second Department of Radiation 31 and the 3rd Department of Radiation 32 and first, second and the 3rd Department of Radiation 30,31 and 32 interconnect and locate at grade.Be provided with inverted L shape groove 5 in the middle of second Department of Radiation 31 and the 3rd Department of Radiation 32.First Department of Radiation 30 comprises that first connecting portion 33 and second connecting portion, 34, the first connecting portions 33 comprise first side 33a and second side 33b.Second connecting portion 34 comprises the 3rd side 34a and four side 34b.First side 33a extends vertically upward from grounding parts 2 one ends, and 33b vertical first side 33a in second side extends left.The vertical second side 33b of the 3rd side 34a extends downwards, and vertical the 3rd side 33a of four side 34b extends left.First side 33a and the 3rd side 34a are parallel to each other, and second side 33b and four side 34b are parallel to each other.

Coaxial cable 4 comprises inner conductor 40, braid conductor 41, inner insulating layer 42 and external insulation layer 43.Inner conductor 40 and four side 34b electrically connect, and braid conductor 41 electrically connects with grounding parts 2.Feedback point 44 is the signal tie point, is located at the intersection of inner conductor 40 and four side 34b.Coaxial cable 4 extends down mutually and is connected with grounding parts 2 from feedback point 44.

First Department of Radiation 30, second Department of Radiation 31, grounding parts 2 and coaxial cable 4 constitute first planar inverted F-shape antenna, are used for receiving or emission higher frequency signals (5.15～5.875GHz).First Department of Radiation 30, grounding parts 2 and coaxial cable 4 looping antennas also are used for launching or reception higher frequency signals (5.725～5.875GHz).First Department of Radiation 30, the 3rd Department of Radiation 32, grounding parts 2 and coaxial cable 4 constitute that second planar inverted F-shape antenna is used for receiving or emission low frequency signals (2.4GHz～2.5GHz).First planar inverted F-shape antenna both can be operated in identical frequency range with loop aerial also can be operated in different frequency ranges.Change the length of first connecting portion 33 or the impedance matching that shape can be regulated first, second planar inverted F-shape antenna.

Please refer to shown in Figure 3, the voltage standing wave(VSW) ratio of the utility model multifrequency antenna 1 between 2.4～2.5GHz and 5.15～5.875GHz all less than 2, showing promptly that the utility model multifrequency antenna 1 has both can be operated in higher frequency band and also can be operated in lower frequency band, can realize wide band characteristic when being operated in higher frequency band simultaneously.

Fig. 4 to shown in Figure 9 be after the utility model is packed in the notebook computer, when operating frequency is respectively 2.4～2.5GHz, 5.15～5.35GHz and 5.725～5.825GHz and level on the X-Y plane and perpendicular polarization electromagnetic radiation field pattern.By test result as can be known, the average gain of multifrequency antenna 1 all can meet the demands under three kinds of working frequency range.

Claims

1. multifrequency antenna, be used in the electronic equipment, comprise Department of Radiation, grounding parts and be connected Department of Radiation and the coaxial cable of grounding parts, it is characterized in that: Department of Radiation and grounding parts are integrally formed by offer cell body in the metal plate-like portion of electronic equipment, and grounding parts, Department of Radiation and coaxial feeder constitute two planar inverted F-shape antennas and loop aerial is used for enlarging the frequency bandwidth that antenna uses.

2. multifrequency antenna according to claim 1 is characterized in that: described electronic equipment is a notebook computer, and described metal plate-like portion is the support that the inner LCD of notebook computer links to each other with shell.

3. multifrequency antenna according to claim 1, it is characterized in that: described Department of Radiation comprises first Department of Radiation, second Department of Radiation and the 3rd Department of Radiation, first Department of Radiation comprises first connecting portion and second connecting portion, is provided with the inverted L shape groove in the middle of second Department of Radiation and the 3rd Department of Radiation.

4. multifrequency antenna according to claim 3 is characterized in that: described first connecting portion comprises first side and second side, and second connecting portion comprises the 3rd side and four side.

5. multifrequency antenna according to claim 4, it is characterized in that: extend vertically upward from an end of grounding parts described first side, extend left vertical first side, second side, and the vertical second side of the 3rd side extension is downwards extended left with vertical the 3rd side of four side and is connected with coaxial cable.

6. multifrequency antenna according to claim 4 is characterized in that: described first side and the 3rd side are parallel to each other, and second side and four side are parallel to each other.

7. multifrequency antenna according to claim 4, it is characterized in that: described coaxial cable comprises inner conductor, inner insulating layer, braid conductor and external insulation layer, inner conductor and four side electrically connect, and inner conductor and four side joining are the feedback point of antenna.

8. multifrequency antenna according to claim 3, it is characterized in that: described first Department of Radiation, second Department of Radiation, grounding parts and coaxial cable constitute first planar inverted F-shape antenna, first Department of Radiation, grounding parts and coaxial cable looping antenna, first Department of Radiation, the 3rd Department of Radiation, coaxial cable and grounding parts constitute second planar inverted F-shape antenna.