CN2872621Y

CN2872621Y - Double-frequency antenna

Info

Publication number: CN2872621Y
Application number: CNU2006200698298U
Authority: CN
Inventors: 尚兴科
Original assignee: Mitac Precision Technology Kunshan Ltd
Current assignee: Mitac Precision Technology Kunshan Ltd
Priority date: 2006-03-02
Filing date: 2006-03-02
Publication date: 2007-02-21
Anticipated expiration: 2016-03-02

Abstract

A double band antenna comprises an antenna body and a feed line. The antenna body comprises a first vibration generator, a second vibration generator, a base plate, and two connecting parts connecting the first and the second vibration generators with the base plate respectively. The first and the second vibration generator extend from two opposite side edge of the base plate and form a certain distance in vertical direction. Every two of the planes where the first and the second vibration generator and the base plates are arranged respectively are in parallel. The feed line comprises a core line welded on the second vibration generator, and a shielding layer welded on the base plate. The two vibration generators are partially overlaid in vertical direction.

Description

Dual-band antenna

[technical field]

The utility model relates to a kind of dual-band antenna, and is particularly related to a kind of plane inverse F type dual-band antenna.

[background technology]

Along with the extensive use of WLAN (WLAN (wireless local area network)) at modern mobile office environment, the antenna that is installed on the portable communication apparatus is able to a large amount of uses, and the main flow wireless LAN communication agreement of Chan Shenging mainly comprises IEEE802.11b and two kinds of standards of 802.11a thereupon, the main 2.4-2.5GHz of the working frequency range of 802.11b wherein, and the working frequency range of 802.11a is contained 5.15-5.35GHz.

Planar inverted F-shape antenna (Planar Inverted-F Antenna PIFA) is a kind of miniaturization built-in aerial that is applicable to mobile terminals commonly used.See also shown in Figure 1, structural representation for existing a kind of plane inverse F type dual-band antenna, this antenna comprises antenna body 1 and feeder line (not drawing among the figure), wherein this antenna body comprises first oscillator 10, second oscillator 11, substrate 13, and first connecting portion 14 that connects above-mentioned second oscillator 11 and substrate 13 be connected the above-mentioned the 1, second connecting portion 16 of second oscillator 11, above-mentioned second oscillator 11 extends from the lateral margin of substrate 13, and be connected with substrate 13 by first connecting portion 14, first oscillator 10 extends out from the lateral margin with respect to first connecting portion 14 of second oscillator 11, and be connected with second oscillator 11 by second connecting portion 16, and first oscillator 10, second oscillator 11 and substrate 13 the threes plane at place respectively form the stereochemical structure that is parallel to each other in twos, as can be seen, there is following shortcoming in above-mentioned antenna structure:

1. the mechanical performance instability is subjected to external force deformation easily, influences end properties;

2. need continuously folding mould to handle oscillator, product cost is higher.

In view of this, provide a kind of stable mechanical performance by necessity in fact, lower-cost plane inverse F type dual-band antenna is to produce a desired effect.

[summary of the invention]

Therefore, the purpose of this utility model just provides a kind of plane inverse F type dual-band antenna, and this plane inverse F type dual-band antenna stable mechanical performance, cost are lower.

For achieving the above object, the utility model provides a kind of plane inverse F type dual-band antenna, this antenna comprises first, second oscillator, substrate, and connect above-mentioned first, first of second oscillator and substrate, second connecting portion, described first, second oscillator extends from the opposite side edges of substrate respectively, to guarantee its stable mechanical performance, and first, second oscillator overlaps and is provided with certain intervals at vertical direction, and first, second oscillator and substrate the three plane at place respectively form the stereochemical structure that is parallel to each other in twos, first, second oscillator all forms certain slit and forms resonance frequency magnetic field with substrate, above-mentioned first, second oscillator works in first respectively, second frequency range, and described first, the length of second oscillator corresponds respectively to above-mentioned first, the wavelength ratio of a characteristic frequency in second frequency range.

Particularly, described plane inverse F type dual-band antenna also comprises a feeder line, this feeder line has internal core wire and screen, wherein a wherein end of above-mentioned internal core wire is electrically connected on above-mentioned first oscillator and the oscillator of second oscillator than weak point, and a wherein end of above-mentioned screen is electrically connected at aforesaid substrate.

Compared with prior art, the utility model provides a kind of plane inverse F type dual-band antenna of stable mechanical performance, moreover the utility model is simple in structure, manufacturing expense is low.

For making structural feature of the present utility model and function thereof there are further understanding, cooperate diagram to be described in detail as follows now:

[description of drawings]

Fig. 1 is the three-dimensional structure diagram of an existing plane inverse F type dual-band antenna.

Fig. 2 is a three-dimensional structure diagram of the present utility model.

Fig. 3 is that the voltage standing wave ratio performance at its working frequency range of the present utility model measures figure.

[embodiment]

See also shown in Figure 2ly, be three-dimensional structure diagram of the present utility model.This plane inverse F type dual-band antenna comprises first oscillator 44, second oscillator 50, substrate 30, and connects first connecting portion 60 of first oscillator 44 and substrate 30 and be connected second connecting portion 70 of second oscillator 50 and substrate 30; Wherein, first oscillator 44 and second oscillator 50 extend from the opposite side edges of substrate 30 respectively, to guarantee the good mechanical stability energy of this antenna, and first oscillator 44, second oscillator 50 overlap and are provided with certain intervals at vertical direction, and first oscillator 44, second oscillator 50 and substrate 30 threes form the stereochemical structure that is parallel to each other in the plane at place respectively in twos, and first oscillator 44, second oscillator 50 all form certain slit and form resonance frequency magnetic field with substrate 30.And above-mentioned first oscillator 44 and second oscillator 50 are a long strip type sheet metal, and the length of first oscillator 44 and second oscillator 50 corresponds respectively to the wavelength ratio of a characteristic frequency in above-mentioned first, second frequency range.

In addition, antenna of the present utility model also comprises a feeder line 120, and this feeder line 120 is generally coaxial cable, comprises internal core wire 310 and screen 200.And between this internal core wire 310 and the screen 200, and between this screen 200 and the external world around it, include an insulating medium layer 100.To be example among Fig. 2, an end of this screen 200 is electrically connected on the aforesaid substrate 30, and the other end of this screen 200 and the grounding assembly on the communication terminal electrically connect; One end of above-mentioned internal core wire 310 is electrically connected on above-mentioned second oscillator 50, and the microwave receiving on the other end of above-mentioned internal core wire 310 and the communication terminal/sending assembly electrically connects.

The utility model dual-band antenna operating frequency is respectively 2.4GHZ (2.4GHZ-2.5GHZ) and 5GHZ (5.15GHZ-5.35GHZ), by first oscillator, 44 control 2.4GHZ frequency signals, second oscillator, 50 control 5GHZ frequency signals, see also shown in Figure 3, obviously, in the frequency range of 2.4GHZ (2.4GHZ-2.5GHZ) and 5GHZ (5.15GHZ-5.35GHZ), the voltage standing wave ratio of the utility model dual-band antenna satisfies the proportion requirement of industry for voltage standing wave ratio or antenna energy radiation and reflection less than 2.

The plane inverse F type dual-band antenna that the utility model provides compared with prior art has following good effect:

1. owing to adopted oscillator folding, can guarantee its stable mechanical performance from both sides,

2. secondly, avoid using continuously folding mould, make it simple in structure, easy to manufacture, saved production cost to a certain extent.

Claims

1, a kind of plane inverse F type dual-band antenna comprises antenna body and feeder line, and wherein antenna body comprises first oscillator, second oscillator, substrate, and first connecting portion and second connecting portion that is connected second oscillator and substrate that connect first oscillator and substrate; Described first, second oscillator extends from the opposite side edges of substrate respectively, and first, second oscillator is provided with certain intervals at vertical direction, and first, second oscillator and substrate the three plane at place respectively form the stereochemical structure that is parallel to each other in twos, described feeder line has internal core wire and screen, screen is welded on the substrate, it is characterized in that: first oscillator and second oscillator are in the vertical direction setting that overlaps, and the internal core wire of feeder line is welded on second oscillator.

2, plane inverse F type dual-band antenna as claimed in claim 1 is characterized in that: can regulate the impedance matching of this antenna by the welding position of internal core wire on second oscillator of regulating feeder line.

3, plane inverse F type dual-band antenna as claimed in claim 1 is characterized in that: two different frequency ranges of first, second oscillator control, and first oscillator is controlled than low-frequency range second oscillator control higher frequency band.