CN2629238Y

CN2629238Y - Multi-frequency antenna

Info

Publication number: CN2629238Y
Application number: CNU032508107U
Authority: CN
Inventors: 郭家铭; 戴隆盛; 张广元; 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: 2003-05-07
Filing date: 2003-05-07
Publication date: 2004-07-28
Anticipated expiration: 2013-05-07

Abstract

The utility model relates to a multi-frequency antenna applied on portable wireless communication terminal equipment, comprising an insulation substrate, a rectangular wave-shaped first radiating part, a L-shaped second radiating part, a grounding part and a feeder, wherein the first and second radiating parts are metallic printed wires and are arranged on the upper surface of the insulation substrate, moreover a preset gap is provided between both the first and second radiating parts. The grounding part is arranged at the lower surface of the insulation substrate. The first radiating part, feeder and grounding part form a first single pole antenna operated at a first frequency band; the second radiating part, feeder and grounding part form a second single pole antenna operated at the second frequency band. The first single pole antenna can realize the ideal impedance matching by adjusting the preset gap.

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 on the electronic installation movably.

[background technology]

The technology history of unipole antenna is remote, and is simple in structure and make easily because of it, and usually adopted by relevant technical staff.For Modern wireless communication equipment, under the prerequisite that guarantees the antenna receiving-sending performance, the miniaturization of antenna also is very important design consideration.Therefore, printing-type is made and also usually is applied to these Antenna Design.Nowadays various Wireless Telecom Equipments often need compatible multistandard (as the standard agreement 802.11a/b/g of WLAN), so the design of multifrequency antenna also is one of industry hot of research and development.

The prior art relevant with the utility model can be with reference to No. the 6486834th, United States Patent (USP), and this patent has disclosed a kind of printing type monopole antenna 20.This antenna comprises rectangle insulated substrate 22, is separately positioned on insulated substrate first and second antenna element 24,26 and the coaxial feeder 28 on two surfaces up and down.Wherein first antenna element is the wavy printed wire of rectangle, and second antenna element is the rectangle Copper Foil, and as antenna ground portion.The inner wire 282 of feeder line is welded on aforesaid first antenna element, and its outer conductor 284 is welded on the aforementioned Copper Foil.

Though yet the problem of the miniaturization that this unipole antenna solves does not have the characteristics that multifrequency is used.

[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 is a kind of unipole antenna, comprises the rectangle insulated substrate, is arranged on first, second Department of Radiation of insulated substrate upper surface, the grounding parts that is located at the insulated substrate lower surface and feeder line.First, second Department of Radiation and grounding parts are all printed wire, and both are at a distance of default spacing.Wherein, first Department of Radiation is rectangular wavy, and second Department of Radiation is L shaped.First Department of Radiation, grounding parts and feeder line constitute first unipole antenna and are operated in the first lower frequency range; Second Department of Radiation, grounding parts and feeder line constitute second unipole antenna and are operated in the second higher frequency range.

Compared to prior art, the utility model multifrequency antenna has increased by second unipole antenna makes antenna can be operated in the another one frequency range, and the spacing that can adjust between aforementioned second Department of Radiation and first Department of Radiation changes the resistance value of first unipole antenna to reach comparatively desirable impedance matching.

[description of drawings]

Fig. 1 is the utility model vertical view.

Fig. 2 is the utility model upward view.

Fig. 3 is the utility model cutaway view.

Fig. 4 is the utility model key dimension sign picture.

Fig. 5 is the utility model voltage standing wave ratio (VSWR) performance measurement curve chart.

The electromagnetic radiation field pattern of the horizontal polarization when Fig. 6 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. 7 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. 8 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. 9 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 Figure 10 is operated in the 5.725GHZ frequency for the utility model on the X-Y plane.

The electromagnetic radiation field pattern of the perpendicular polarization when Figure 11 is operated in the 5.725GHZ frequency for the utility model on the X-Y plane.

[embodiment]

Please refer to Fig. 1 to shown in Figure 3, the utility model multifrequency antenna 1 comprises rectangle insulated substrate 2, is arranged on first, second Department of

Radiation

3,4 of insulated substrate 2 upper surfaces, the grounding parts 5 that is located at insulated substrate 2 lower surfaces and feeder line 6.Wherein first, second Department of

Radiation

3,4 and grounding parts 5 are all the operplate printing circuit.

One side of 2 one minor faces of insulated substrate offers two first and second nearer through

holes

21,22 apart and in order to cooperate screw (not shown) insulated substrate 2 is installed on the housing (not shown) of electronic equipment.Insulated substrate 2 middle parts offer third through-hole 23, and insulated substrate 2 upper surfaces are provided with annular sheet metal 231 around third through-hole 23.

One end of first Department of Radiation 3 is connected on the annular sheet metal 231, and the other end extends to insulated substrate 2 another minor face places, and its to be shaped as continuous rectangle wavy.Second Department of Radiation 4 extends to place, the long limits of insulated substrate 2 one from annular sheet metal 231, and vertically bends herein along this length limit and extend the distance equal with bond length to another short side direction, and it is shaped as English alphabet " L " shape.Be preset with one section distance between aforementioned two Departments of

Radiation

3,4.

Grounding parts 5 is longitudinal operplate printing circuits, is arranged on insulated substrate 2 lower surfaces, is parallel to insulated substrate 2 minor faces, and isometric with insulated substrate 2 minor faces, between first and second through

hole

21,22 and third through-hole 23.

Feeder line 6 is coaxial cables, comprises inner wire 61, inner insulating layer (not label), wire sheathing 62 and external insulation layer (not label).External insulation layer and wire sheathing 62 expose one section inner wire 61 all by one section of flake-off in aforementioned, and this section inner wire 61 passes third through-hole 23 to insulated substrate 2 upper surfaces, and are soldered on the annular sheet metal 231.Described wire sheathing 62 is soldered on the grounding parts 5 at insulated substrate 2 lower surface places.

First Department of Radiation 3, grounding parts 5 and feeder line 6 can constitute first unipole antenna and be operated in lower first frequency range (as 2.4-2.5GHZ) of frequency.Second Department of Radiation 4, grounding parts 5 and feeder line 6 can constitute second unipole antenna and be operated in higher second frequency range (as 5.15-5.825GHZ) of frequency.And adjust the resistance value that distance between two Departments of

Radiation

3,4 can be adjusted first unipole antenna.Select suitable distance can make the unipole antenna of winning obtain comparatively ideal matching resistance value.

Claims

1. multifrequency antenna, be used for wireless telecommunications system, comprise insulated substrate, be located at first Department of Radiation of insulated substrate upper surface, the grounding parts that is located at the insulated substrate lower surface and coaxial feeder, wherein coaxial feeder comprises and described first Department of Radiation, one end inner wire that links to each other and the metal organization level that links to each other with grounding parts, it is characterized in that: affiliated multifrequency antenna also comprises second Department of Radiation that is located at the insulated substrate upper surface, and an end of second Department of Radiation links to each other with aforementioned first Department of Radiation, one end.

2. multifrequency antenna as claimed in claim 1 is characterized in that: described first Department of Radiation is rectangular wavy and constitute first unipole antenna with grounding parts and feeder line, and second Department of Radiation is L-shaped and constitute second unipole antenna with grounding parts and feeder line.

3. multifrequency antenna as claimed in claim 2 is characterized in that: distance between described first Department of Radiation and second Department of Radiation are provided with and preset.

4. multifrequency antenna as claimed in claim 3 is characterized in that: the adjustment of described default spacing size can change the impedance of first unipole antenna.