CN2840344Y

CN2840344Y - Double-frequency antenna structure

Info

Publication number: CN2840344Y
Application number: CNU2005201221243U
Authority: CN
Inventors: 邱宏献; 张毅华
Original assignee: Wha Yu Industrial Co Ltd
Current assignee: Wha Yu Industrial Co Ltd
Priority date: 2005-09-27
Filing date: 2005-09-27
Publication date: 2006-11-22
Anticipated expiration: 2015-09-27

Abstract

The utility model relates to a double-frequency antenna structure, which is designed to solve the defects in the prior art that the size of antennae can be miniaturized and impedance matching is not easy to adjust. The utility model comprises a grounding part, a connecting part, a radiating part which is connected with the top of the connecting part and is corresponding to the grounding part, and a feed-in terminal, wherein the radiating part is composed of a first radiating arm with a proper length and a second radiating arm with a longer lengeh; the first radiating arm is connected with one side of the feed-in terminal, and the first radiating arm turns to an opposite direction and extends to form the second radiating arm. The special composition of the components can make the size of the antenna become smaller, and is favorable to the assembly and application of miniaturized electronic equipment.

Description

Double-frequency antenna structure

Technical field

The utility model relates to a kind of Double-frequency antenna structure, and particularly a kind of special construction of Department of Radiation of antenna is formed, and can impel the size of antenna to dwindle and help the assembling utilization of miniaturized electric subset.

Background technology

Antenna is in the field of wireless telecommunications, assembly of the utmost importance for signal transmission and reception, the concern quality of communication of the electrical characteristic of antenna, and antenna is the miniaturization day by day of arranging in pairs or groups, the transmission characteristic of the electronic equipment performance wireless telecommunications of thin typeization, therefore industry is researched and developed the demand that the antenna that has more miniaturization satisfies electronic equipment invariably, so the generation of PIFA (Planar Inverted F-Antenna) antenna is arranged, because the radiation field shape of this kind of antenna is good, and it is simple in structure, make simple and easy, and the about wavelength of length of antenna 1/4th, hereat the PIFA antenna meets the market demand of miniaturization and cost degradation.

Fig. 1 is first kind of PIFA antenna structure commonly used, this antenna 10 is the electromagnetic wave of two kinds of different frequencies of transmitting-receiving, when utilizing feed-in pin 11 with current fed radiation assembly 12, two path flow were moving about electric current can be divided into, send the electromagnetic wave of different frequency because of two path differences, because the length of radiation assembly 12 is by its predetermined operating frequency decision, be generally 1/4 of operation wavelength, the antenna length that two paths were added up about antenna 10 commonly used was divided into radiation assembly 12, the demand of antenna size miniaturization will do not met, in addition, the feed-in pin 11 of antenna commonly used is between the radiation assembly 12 of two operating frequencies, when the distance between feed-in pin 11 and the ground connection pin 13 needs the suitable impedance matching of in addition adjustment, also can influence the characteristic of radiation assembly 12 transmitting-receiving signals simultaneously, so cause the impedance matching of existing antenna to be difficult for the shortcoming of adjusting.

The utility model content

Main purpose of the present utility model is to provide a kind of Double-frequency antenna structure, and the special composition that it utilizes Department of Radiation can make the size of antenna be easy to miniaturization, and can simplify the structure of Department of Radiation, and then meets the demand of Financial cost and miniaturized electric subset.

Secondary objective of the present utility model is the special composition that utilizes Department of Radiation and feed side, can make antenna be easier to the adjustment of impedance matching.

For achieving the above object, the utility model Double-frequency antenna structure, comprise a grounding parts, a junction, one is connected in connecting portion top and the Department of Radiation relative with grounding parts, and one the feed side electrically connect institute by coaxial feeder and grounding parts and constitute, wherein this connecting portion lower end is connected with a side of grounding parts, the support arm of this connecting portion upper end turnover connection one suitable length is also adjacent with grounding parts, so that the terminal side that connects the feed side of support arm, this Department of Radiation is to be connected first radiation arm of a suitable length and oppositely extended one long and constituted adjacent to second radiation arm of support arm by the first radiation arm place by the feed side opposite side.

Adopt said structure, structure connects second radiation arm to utilize first radiation arm to come altogether, thereby can shorten existing antenna and be the length that left and right sides radiation assembly configuration is increased, under the state that does not need other linking arm to be connected because of first and second radiation arm again or distinguish, only need to use as connector by first radiation arm, so can significantly reduce the sheet metal raw material of making antenna, integral body can reach the antenna size miniaturization and reduce the Practical Benefit of manufacturing cost.

Description of drawings

Fig. 1 is the floor map of existing PIFA antenna.

Fig. 2 is a stereo appearance figure of the present utility model.

Fig. 3 is the floor map of facing of the present utility model.

Fig. 4 is a top plan schematic view of the present utility model.

Embodiment

Understand for ease of having the purpose of this utility model, feature and effect further, existing conjunction with figs. describes in detail as the back:

As Fig. 2, Fig. 3, shown in Figure 4, the utility model provides a kind of Double-frequency antenna structure, it comprises: a grounding parts 20, a junction 30, one is connected in connecting portion 30 tops and the Department of Radiation 40 relative with grounding parts 20, and one feed side 50 electrically connect institute by coaxial feeder 60 with grounding parts 20 and constitute, wherein these connecting portion 30 lower ends are connected with a side of grounding parts 20, the support arm 70 of this connecting portion 30 upper ends turnover connection one suitable length is also relative with grounding parts 20, so that the terminal sides that connect feed sides 50 of support arm 70, this Department of Radiation 40 is to be connected first radiation arm 401 of a suitable length and oppositely extended one long and constituted adjacent to second radiation arm 402 of support arm 70 by first radiation arm, 401 places by feed side 50 opposite sides.

A kind of Double-frequency antenna structure of the present utility model, wherein the free end of this second radiation arm 402 also can form a flanging portion 403.

The utility model utilizes first radiation arm 401 to come altogether, and structure connects second radiation arm 402, so that first radiation arm 401 is except can be used as first operating frequency, also has the effectiveness that connects second radiation arm 402 simultaneously, so that second radiation arm 402 can be used as second operating frequency, can shorten existing antenna like this and be the length that left and right sides radiation assembly configuration is increased, again because of first, two radiation arms 401,402 do not need other linking arm to be connected or the state distinguished under, only need to use as connector by first radiation arm 401, so can significantly reduce the sheet metal raw material of making antenna, integral body can reach the antenna size miniaturization and reduce the Practical Benefit of manufacturing cost.

Feed side 50 of the present utility model is between first radiation arm 401 and support arm 70, therefore reduce to minimum with the overlapping zone of first and second radiation arm 401,402, so feed side 50 electrically connects coaxial feeder 60 and grounding parts 20, and and connecting portion 30 between the relative position adjustment, the input impedance matching of adjustment dual-band antenna be can be very easy to, and the electrical characteristic and the radiation transmitting-receiving effect of Department of Radiation 40 can not be influenced.

Second radiation arm 402 of the present utility model, also can form a flanging portion 403 at free end, so that second radiation arm, 402 required plane length are reduced because of the turnover of flanging portion 403, but entire length still meets the required size of operating frequency, so also can dwindle the size of antenna, and then meet the space requirement of miniaturized electric subset.

The flanging portion 403 of the utility model second radiation arm 402, also can be one-body molded with second radiation arm 402 be linearity.

Preamble is at technical characterictic of the present utility model, carries out specific description by preferred embodiment; But the personage who is familiar with this technology is when can changing and revise not breaking away under spirit of the present utility model and the principle, and these changes with revise, the obvious claim that all should contain present patent application defines in the category.

Claims

1, a kind of Double-frequency antenna structure, comprise a grounding parts, a junction, one is connected in connecting portion top and the Department of Radiation relative with grounding parts, and one the feed side electrically connect institute by coaxial feeder and grounding parts and constitute, wherein this connecting portion lower end is connected with a side of grounding parts, it is characterized in that: the support arm of this connecting portion upper end turnover connection one suitable length is also adjacent with grounding parts, so that the terminal side that connects the feed side of support arm, this Department of Radiation is to be connected first radiation arm of a suitable length and oppositely extended one long and constituted adjacent to second radiation arm of support arm by the first radiation arm place by the feed side opposite side.

2, Double-frequency antenna structure as claimed in claim 1 is characterized in that: the free end of this second radiation arm forms a flanging portion.

3, Double-frequency antenna structure as claimed in claim 1 is characterized in that: the flanging portion of this second radiation arm and second radiation arm are one-body molded to be linearity.