CN2629235Y

CN2629235Y - Double-frequency antenna

Info

Publication number: CN2629235Y
Application number: CN 03262090
Authority: CN
Inventors: 戴隆盛; 郭家铭; 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: 2003-05-22
Filing date: 2003-05-22
Publication date: 2004-07-28
Anticipated expiration: 2013-05-22

Abstract

The utility model relates to a double-frequency antenna, comprising an insulation substrate, a first radiating part, a second radiating part, a co-axial feeder, a first connection part and a second connection part, the coaxial feeder comprises metal braided layers electrically connected with the grounding part and inner core leads electrically connected with the first and second radiating parts, the first radiating part is connected with the grounding part by the connection part, the first radiating part and the second radiating part and the inner core leads of the coaxial feeder are connected by the second connection part, the second radiating part is symmetrically provided with two control arms at the second connection part. By the above settings, the double-frequency antenna can be operated at two different frequency bands.

Description

Dual-band antenna

[technical field]

The utility model relates to a kind of antenna, relates in particular to a kind of being installed in and is used for the dual-band antenna that receives or transmit in the electronic installation.

[background technology]

(Planar Inverted-F Antenna PIFA) is mobile device in modern age a kind of desirable small-sized built-in aerial commonly used to planar inverted F-shape antenna.But the electric gonosome of antenna amasss/(frequency band * gain * efficient)=constant, and with antenna planeization and miniaturization, its frequency bandwidth and radiation efficiency all can reduce, so planar inverted F-shape antenna is difficult to have simultaneously the characteristic of miniaturization and double frequency application.

Related art can be consulted United States Patent (USP) the 6th, 204,819 B1 numbers, the dual-band antenna that it disclosed comprises planar inverted F-shape antenna and loop aerial structure simultaneously, select different signal feed-in modes to switch between the two by switch, the adjustable scope of this dual-band antenna working band is big and relatively more flexible.Yet this dual-band antenna adopts stereochemical structure, need take bigger space, is unfavorable for that electronic product develops to miniaturization.And this dual-band antenna adopts different signal feed-in modes to come the switch operating frequency band, complex structure, and cost is higher.

[utility model content]

The purpose of this utility model is to provide the dual-band antenna that a kind of cost is lower, volume is less.

For achieving the above object, the utility model adopts following technical scheme: the utility model dual-band antenna, comprise insulated substrate, be arranged at the grounding parts on the insulated substrate, first Department of Radiation, second Department of Radiation, first connecting portion that first Department of Radiation, one end is connected with grounding parts, second connecting portion and feeder line that first Department of Radiation is connected with second Department of Radiation, wherein said feeder line is a coaxial cable, it comprises the wire sheathing that electrically connects with grounding parts and the inner core lead that electrically connects with the junction of second Department of Radiation and second connecting portion, and wherein second Department of Radiation comprises vertically two control arms of setting of both sides.

Compared with prior art, the utility model dual-band antenna simple in structure, volume is less, by first and second Departments of Radiation are set, can be operated in two frequency ranges.

[description of drawings]

Fig. 1 is the plane structure chart of the utility model dual-band antenna.

Fig. 2 is the horizontal polarization electromagnetic radiation diagram that the utility model dual-band antenna is operated in 2.45GHz.

Fig. 3 is the perpendicular polarization electromagnetic radiation diagram that the utility model dual-band antenna is operated in 2.45GHz.

Fig. 4 is the horizontal polarization electromagnetic radiation diagram that the utility model dual-band antenna is operated in 5.35GHz.

Fig. 5 is the perpendicular polarization electromagnetic radiation diagram that the utility model dual-band antenna is operated in 5.35GHz.

Fig. 6 is the utility model dual-band antenna standing-wave ratio resolution chart.

[embodiment]

Please refer to shown in Figure 1ly, the utility model dual-band antenna 1 comprises plane insulated substrate 30, grounding parts 10, first Department of Radiation 21, second Department of Radiation 22, first connecting portion 23, second connecting portion 25 and signal feed 40.

Grounding parts 10, first Department of Radiation 21, second Department of Radiation 22, first connecting portion 23 and second connecting portion 25 are all sheet metal and are covered on insulated substrate 30 1 side surfaces, wherein grounding parts 10 is tabular, and first Department of Radiation 21 and first connecting portion 23 all are the lengthwise strip.First connecting portion 23 is connected the end of first Department of Radiation 21 with the end of grounding parts 10, so first Department of Radiation 21 and first connecting portion 23 form L shaped structure.First Department of Radiation, 21 other ends are to be parallel to the free end that grounding parts 10 extends.Second connecting portion 25 is stepped and second Department of Radiation, 22 middle parts are connected with first Department of Radiation, 21 middle parts, is referred to as two L shaped control arms 221,222 thereby second Department of Radiation 22 has been formed about 25 pairs of second connecting portions.Grounding parts 10 is provided with extension 11, and the junction of second connecting portion 25 and second Department of Radiation 22 is extended and is provided with the feeding portion 24 relative with extension 11.

Feeder line 40 is a coaxial line, comprises wire sheathing 41 and inner core lead 42, and wherein inner core lead 42 is welded on the feeding portion 24, and wire sheathing 41 is welded on the extension 11 of grounding parts 10.

First Department of Radiation 21, second connecting portion 25, feeding portion 24, extension 11, grounding parts 10 and feeder line 40 constitute a planar inverted F-shape antenna, are used for receiving or launching than low frequency signal.Second Department of Radiation 22 is used for making dual-band antenna 1 can launch or receive the signal of higher-frequency, and is used for controlling the frequency band of high-frequency signal and adjusts impedance matching.

Fig. 2 to Fig. 5 is respectively level and the perpendicular polarization electromagnetic radiation field pattern of the utility model dual-band antenna 1 operating frequency when being respectively 2.45GHz and 5.35GHz, by test result as can be known, the average gain of dual-band antenna 1 all can meet the demands under two kinds of operating frequencies, does not have obvious dead angle.

Please refer to shown in Figure 6ly, the value of the utility model dual-band antenna 1 voltage standing wave ratio is all less than 2 between 2.4GHz～2.5GHz and the 5.25-5.45GHz in operating frequency.

Claims

1. dual-band antenna, comprise insulated substrate, be arranged at grounding parts on the insulated substrate, feeder line, first Department of Radiation, with first Department of Radiation, one end first connecting portion that is connected with grounding parts and second connecting portion that first Department of Radiation is connected with feeder line, wherein said feeder line is a coaxial cable, comprise wire sheathing that electrically connects with grounding parts and the inner core lead that electrically connects with second connecting portion, it is characterized in that: described dual-band antenna also comprises from extended second Department of Radiation of second connecting portion.

2. dual-band antenna as claimed in claim 1 is characterized in that: described second Department of Radiation comprises two control arms that are symmetrically set in the second connecting portion both sides.

3. dual-band antenna as claimed in claim 2 is characterized in that: described two control arms are all L-shaped perpendicular to second connecting portion and its free end.

4. dual-band antenna as claimed in claim 3, it is characterized in that: described first Department of Radiation, first connecting portion, second connecting portion and coaxial feeder constitute planar inverted F-shape antenna, work in lower working frequency range, second Department of Radiation works in higher working frequency range.

5. dual-band antenna as claimed in claim 4 is characterized in that: described second connecting portion is stairstepping.