CN2850007Y

CN2850007Y - Printed dipole antenna

Info

Publication number: CN2850007Y
Application number: CN 200520072485
Authority: CN
Inventors: 柯云龙; 苏纹枫; 黄耀先; 洪振达; 张仕冬; 郭金宝
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: 2005-06-06
Filing date: 2005-06-06
Publication date: 2006-12-20
Anticipated expiration: 2015-06-06

Abstract

A printed dipole antenna formed on insulation substrate comprises a coaxial cable, a radiation division and a ground division which are made of the metal. The coaxial cable comprises an inner core connecting to the radiation division and a braid conductor connecting to the ground division; in which the printed dipole antenna also comprises a short circuit loop. The design may remove the interference signal through the short circuit loop.

Description

Printed dipole antenna

[technical field]

The utility model is about a kind of dipole antenna, relates in particular to a kind of printed dipole antenna that is used in the electronic equipment.

[background technology]

Along with the product with wireless transmission capability is universal day by day, for the user, can not be subjected to environmental limit is the very convenient thing of part with the wireless mode data transmission.Yet its transmission quality has close relevance with the antenna that product adopted with wireless transmission capability, so the quality of antenna is being played the part of important role for the development wireless communication technique.

Traditional dipole antenna or helical antenna or the like because its volume is bigger, make wireless communication apparatus be hindered towards the microminiaturization development.Therefore existing wireless communications industry personage utilizes the principle of plate aerial to develop the less PCB antenna of volume in recent years.

PCB antenna is that wireless transmitting system is incorporated on the printed circuit board (PCB), thus not only volume can do quite little, and its manufacturing cost also declines to a great extent many.This is because PCB antenna does not need due to mechanical structure or other connector.

On December 11st, 2004, the TaiWan, China patent announcement of bulletin disclosed a kind of printed dipole antenna No. 253069.See also shown in Figure 1ly, this antenna comprises Department of Radiation 16, grounding parts 18, insulated substrate 10 and coaxial cable (not shown).Department of Radiation 16 and grounding parts 18 are separately positioned on the both sides of insulated substrate 10.Be provided with first distributing point 5 on Department of Radiation 16, grounding parts 18 is provided with second distributing point 7, and the inner core of coaxial cable and braid conductor are used for feed signal with first distributing point 5 and the welding of second distributing point 7 respectively.

Though the design of this dipole antenna can reach the purpose of antenna volume microminiaturization, but because its Department of Radiation and grounding parts are isolated, when antenna is in the intense electromagnetic field, the interference signal that this interfere with electromagnetic field produced will enter system through Department of Radiation, primary signal and interference signal can't be distinguished by the system that makes, thereby cause system to act on.

[utility model content]

The purpose of this utility model be to provide a kind of can be with the printed dipole antenna of interference signal filtering.

Another purpose of the present utility model is to provide a kind of can and can reduce the printed dipole antenna of aerial radiation path and ground path length with the interference signal filtering.

For reaching above-mentioned purpose, the utility model printed dipole antenna is to make on insulated substrate, it comprises coaxial cable and Department of Radiation that is made of metal and grounding parts, and described coaxial cable comprises inner core that is connected with Department of Radiation and the braid conductor that is connected with grounding parts; Wherein this printed dipole antenna also comprises short-circuit loop.

Compared with prior art, the utility model printed dipole antenna increases short-circuit unit between Department of Radiation and connecting portion, makes above-mentioned Department of Radiation, connecting portion and short-circuit unit constitute short-circuit loop.Interference signal can be passed through the short-circuit loop filtering like this.

[description of drawings]

Fig. 1 is the vertical view of existing printed dipole antenna.

Fig. 2 is the vertical view of the utility model printed dipole antenna first embodiment.

Fig. 3 is the upward view of the utility model printed dipole antenna first embodiment and second embodiment.

Fig. 4 is the vertical view of the utility model printed dipole antenna second embodiment.

Fig. 5 is voltage standing wave(VSW) (VoltageStanding Wave Radio, the VSWR) resolution chart of first embodiment of the utility model printed dipole antenna.

Fig. 6 is voltage standing wave(VSW) (VoltageStanding Wave Radio, the VSWR) resolution chart of second embodiment of the utility model printed dipole antenna.

[embodiment]

See also shown in Figure 2ly, the utility model printed dipole antenna 1 is to constitute on insulated substrate 7.This printed dipole antenna 1 comprises Department of Radiation 2, grounding parts 3, coaxial cable 4 and short-circuit unit 5.

Fig. 2 and shown in Figure 3 be first embodiment of the utility model printed dipole antenna 1, Department of Radiation 2 and grounding parts 3 are symmetricly set on insulated substrate 7 positive relative both sides, described Department of Radiation 2 and grounding parts 3 are all roughly rectangular.Extend to form first weld part 20 at Department of Radiation 2 one side ends, extend to form second weld part 30 at grounding parts 3 and Department of Radiation 2 adjacent side ends.

Coaxial cable 4 comprises inner core 40 and braid conductor 41, wherein inner core 40 and 20 welding of first weld part, braid conductor 41 and 30 welding of second weld part.

Short-circuit unit 5 comprises that length is all first, second short-

circuit piece

51,52 of antenna operation wavelength 1/4, and wherein first short-circuit piece, 51 1 ends are connected with Department of Radiation 2 and are arranged on Department of Radiation 2 tops.Described first short-circuit piece 51 and Department of Radiation 2 can be made by a sheet metal.Second short-circuit piece 52 be arranged on insulated substrate 7 reverse side and with first short-circuit piece, 51 symmetries.Extend to form first protuberance 53 at first short-circuit piece 51 with Department of Radiation 2 adjacent sides.At equidirectional second,

third protuberance

54,55 that extends to form of second short-circuit piece, 52 1 sides.First protuberance 53 is corresponding with second protuberance 54 that is positioned at insulated substrate 7 reverse side, and the 3rd protuberance 55 is corresponding with second weld part 30 that is positioned at insulated substrate 7 fronts.On second,

third protuberance

54,55 corresponding insulated substrates 7, be provided with first, second via 70,71, in first, second via 70,71, be marked with scolding tin (not shown) and make second short-circuit piece 52 weld with first short-circuit piece 51 and grounding parts 3 respectively.Such first short-circuit piece 51, second short-circuit piece 52, Department of Radiation 2 and grounding parts 3 constitute short-circuit loop.Each part of described short-circuit loop all is made of metal.

Fig. 3 and shown in Figure 4 be second embodiment of the utility model printed dipole antenna 1, in the present embodiment, first short-circuit piece 51 is to be connected with Department of Radiation 2 by the strip access path 6 that is arranged on insulated substrate 7 fronts.So then can reduce the length of Department of Radiation 2 and grounding parts 3.In the present embodiment, short-circuit loop is to be made of first short-circuit piece 51, second short-circuit piece 52, short circuit paths 6, Department of Radiation 2 and grounding parts 3.All the other parts are identical with first embodiment, so do not give unnecessary details.

Please refer to Fig. 5 and shown in Figure 6, the first and second embodiment voltage standing wave(VSW) ratios of the utility model printed dipole antenna 1 all less than 2, meet industry and utilize standard between work 2.4-2.5GHz.

Claims

1. printed dipole antenna that on insulated substrate, constitutes, comprise coaxial cable and Department of Radiation that is made of metal and grounding parts, described coaxial cable comprises inner core that is connected with Department of Radiation and the braid conductor that is connected with grounding parts, it is characterized in that: this printed dipole antenna also comprises the short-circuit loop that connects Department of Radiation and grounding parts.

2. printed dipole antenna as claimed in claim 1 is characterized in that: described short-circuit loop comprises short-circuit unit, and described short-circuit unit comprises first short-circuit piece and second short-circuit piece.

3. printed dipole antenna as claimed in claim 2 is characterized in that: the length of described first, second short-circuit piece is 1/4 of antenna operation wavelength.

4. printed dipole antenna as claimed in claim 2 is characterized in that: described first, second short-circuit piece is placed on the positive and negative both sides of insulated substrate respectively.

5. printed dipole antenna as claimed in claim 2 is characterized in that: described first short-circuit piece is connected with Department of Radiation.

6. printed dipole antenna as claimed in claim 2 is characterized in that: described first short-circuit piece and Department of Radiation are made into integration.

7. printed dipole antenna as claimed in claim 5 is characterized in that: described second short-circuit piece is connected with grounding parts.

8. printed dipole antenna as claimed in claim 7, it is characterized in that: described insulated substrate is provided with first via and second via, be marked with scolding tin in first, second connecting hole respectively, second short-circuit piece is to be connected with grounding parts with first short-circuit piece respectively by the scolding tin in first, second via.

9. printed dipole antenna that on insulated substrate, constitutes, comprise coaxial cable and Department of Radiation that is made of metal and grounding parts, described coaxial cable comprises inner core that is connected with Department of Radiation and the braid conductor that is connected with grounding parts, and it is characterized in that: this printed dipole antenna also comprises the short-circuit loop that is made of Department of Radiation, grounding parts, short-circuit unit and access path.

10. printed dipole antenna as claimed in claim 9 is characterized in that: described short-circuit unit comprises first, second short-circuit piece that is placed on the positive and negative both sides of insulated substrate respectively, and described access path connects first short-circuit piece and Department of Radiation.