CN2609205Y

CN2609205Y - Multi-frequency antenna

Info

Publication number: CN2609205Y
Application number: CNU03241546XU
Authority: CN
Inventors: 张广元; 戴隆盛; 林宪助; 洪振达; 郭家铭
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: 2003-03-19
Filing date: 2003-03-19
Publication date: 2004-03-31
Anticipated expiration: 2013-03-19

Abstract

A multi-frequency conformal antenna which is applied to wireless terminal device comprises a base board, a ground connecting part, a radiating part and a feeder line. The ground connecting part and the radiating part take metal conducting plates, which are deposited on the insulting board, and have certain space between. The radiating part comprises a first radiator, a second radiator, a first connector and a second connector. The feeder line comprises a metal braid layer which is connected with the ground connecting part, and an inner conductor which is connected with the first radiator. When the antenna works in a lower frequency, the effective radiating cell is the second radiator; when the antenna works in a high frequency, the first radiator couples with the ground connecting part, and shapes a resonant cavity to achieve broadband resonance.

Description

Multifrequency antenna

[technical field]

The utility model relates to a kind of antenna, refers in particular to a kind of multifrequency antenna that is used for Wireless Telecom Equipment.

[background technology]

The prior art relevant with the utility model can be consulted United States Patent (USP) the 6th, 100, and No. 848, this utility model patent has disclosed a kind of printing type monopole antenna.This unipole antenna comprises tellite 12, is located at the zigzag Department of Radiation 18 of substrate surface, is located at another surperficial parasitic element 20 of substrate, grounding parts and feeder line 30.Antenna can utilize Department of Radiation than low-frequency range resonance, also can utilize the coupling of Department of Radiation and parasitic element and then resonates in higher frequency band.But add described parasitic element on another surface of substrate and will increase the complexity that antenna is made.

[utility model content]

The purpose of this utility model is to provide a kind of multifrequency antenna simple in structure.

The utility model multifrequency antenna comprises insulated substrate, grounding parts, Department of Radiation and feeder line.Wherein, the free end of described Department of Radiation can resonate in lower frequency range, and its relative other end can be realized resonance in higher frequency band by the coupling effect of grounding parts.

Compared with prior art, the utility model multifrequency antenna can utilize Department of Radiation to resonate in low-frequency range, also can directly utilize the higher frequency band that is coupling in of Department of Radiation and grounding parts to resonate, thus do not need the cooperation of other elements (as parasitic element of the prior art), and then realize making simple effect.

[description of drawings]

Fig. 1 is the utility model front view.

Fig. 2 is the utility model key dimension mark figure.

Fig. 3 is the utility model voltage standing wave ratio (VSWR) performance measurement curve chart.

The electromagnetic radiation field pattern of the horizontal polarization when Fig. 4 is operated in the 2.5GHZ frequency for the utility model on the X-Y plane.

The electromagnetic radiation field pattern of the perpendicular polarization when Fig. 5 is operated in the 2.5GHZ frequency for the utility model on the X-Y plane.

The electromagnetic radiation field pattern of the horizontal polarization when Fig. 6 is operated in the 5.35GHZ frequency for the utility model on the X-Y plane.

The electromagnetic radiation field pattern of the perpendicular polarization when Fig. 7 is operated in the 5.35GHZ frequency for the utility model on the X-Y plane.

The electromagnetic radiation field pattern of the horizontal polarization when Fig. 8 is operated in the 5.598GHZ frequency for the utility model on the X-Y plane.

The electromagnetic radiation field pattern of the perpendicular polarization when Fig. 9 is operated in the 5.598GHZ frequency for the utility model on the X-Y plane.

[embodiment]

Please refer to shown in Figure 1ly, the utility model multifrequency antenna 1 comprises insulated substrate 2, is deposited on bending shape Department of Radiation 3, grounding parts 4 and the feeder line 5 on insulated substrate 2 surfaces.Wherein, Department of Radiation 3 and grounding parts 4 are all made with metal material.

Grounding parts 4 is " L " shape, comprise lengthwise portion 41 and with 41 wide short portions 42 connected vertically of lengthwise portion.Described lengthwise portion 41 and wide short portion 42 extends in parallel along 2 two limits of insulated substrate from 2 one jiaos of the substrates of insulating, wherein lengthwise portion 41 extends to another angle of insulated substrate 2 along the minor face of insulated substrate 2, and wide short portion 42 extends along the long limit of insulated substrate 2, and length is about 1/3rd of long limit.Department of Radiation 3 is rectangular frameworks of an openings at one side, comprises first,

second radiation fin

31,34 and first, second brace 32,33.Wherein, first radiation fin 31 is comforted oneself near the short portion 42 to run parallel to lengthwise portion 41 with lengthwise portion 41 and is flushed the place; First brace, 32 1 ends and first radiation fin vertical linking to each other of 31 1 ends, and extend to insulated substrate 2 another angles along the long limits of insulated substrate 2; Second brace, 33 1 ends link to each other with first brace, 32 other ends, and its other end extends to the middle part of insulated substrate 2 minor faces; Second radiation fin 34 is perpendicular to second brace 33, and near second brace, 33 other ends extend inwardly to first radiation fin 31.

Feeder line 5 is coaxial cables, comprises inner wire 51, external insulation layer (not label), wire sheathing 52 and inner insulating layer (not label).Wherein inner wire 51 links to each other with the free end of first radiation fin 31, and wire sheathing 52 links to each other with the wide short portion 42 of grounding parts 4.

Described second radiation fin 34 can be than low-frequency range (as 2.4GHZ-2.5GHZ) resonance, and the effective radiating element of antenna this moment is second radiation fin 34, and can utilize the bending of Department of Radiation 3 to realize impedance matching preferably and reduce the effect of multifrequency antenna 1 size; Described first radiation fin 31 forms resonant cavity (not label) with grounding parts 4 couplings, and then realizes wideband resonance in higher frequency range (as 5.15GHZ-5.725GHZ).

Fig. 2 has provided concrete size of the present utility model, and unit is a millimeter.If insulated substrate 2 adopts the material of high medium coefficient, the size of multifrequency antenna 1 can further be dwindled so.

Fig. 3 has provided voltage standing wave ratio of the present utility model (VSWR) performance measurement curve chart, and as known in the figure, the voltage standing wave ratio at 2.4GHZ-2.5GHZ and 5.15GHZ-5.725GHZ place is all less than 2.

Please refer to Fig. 4 to shown in Figure 9, this multifrequency antenna 1 does not all have tangible dead angle at 2.5GHZ, 5.35GHZ, 5.598GHZ place, the condition of realistic utilization.

Claims

1. multifrequency antenna, can be operated in first, second frequency range, comprise insulated substrate, be deposited on the insulated substrate upper surface Department of Radiation, be deposited on the insulated substrate upper surface and the grounding parts and the feeder line of certain intervals arranged with Department of Radiation, it is characterized in that: described Department of Radiation can resonate by first frequency range that is coupling in grounding parts, also can resonate in second frequency range separately.

2. multifrequency antenna as claimed in claim 1 is characterized in that: described Department of Radiation comprises and can resonate at second radiation fin of second frequency range with independent with first radiation fin of grounding parts coupled resonance in first frequency range.

3. multifrequency antenna as claimed in claim 2 is characterized in that: described grounding parts comprises wide short portion and the lengthwise portion parallel with first radiation fin.

4. multifrequency antenna as claimed in claim 3 is characterized in that: described Department of Radiation also comprises vertical first, second the L-shaped brace that links to each other, and wherein first brace links to each other with first radiation fin is vertical, and second brace links to each other with second radiation fin is vertical.

5. multifrequency antenna as claimed in claim 4 is characterized in that: described feeder line is a coaxial cable, comprises inner wire that links to each other with first radiation fin and the wire sheathing that links to each other with grounding parts.

6. a multifrequency antenna can work in first, second frequency range, comprise insulated substrate, be located at the insulated substrate surface Department of Radiation, be located at grounding parts and feeder line near the Department of Radiation, it is characterized in that: the part of Department of Radiation and grounding parts coupling formation resonant cavity.

7. multifrequency antenna as claimed in claim 6 is characterized in that: described Department of Radiation comprises first, second radiation fin.

8. multifrequency antenna as claimed in claim 7 is characterized in that: described resonant cavity is coupled to form by the grounding parts and first radiation fin.

9. multifrequency antenna as claimed in claim 8 is characterized in that: described multifrequency antenna can utilize resonant cavity resonance in first frequency range, also can utilize the resonance of second radiation fin in second frequency range.。

10. multifrequency antenna as claimed in claim 9 is characterized in that: described feeder line is a coaxial cable, comprises inner wire that links to each other with first radiation fin and the wire sheathing that links to each other with grounding parts.