CN201063360Y

CN201063360Y - Minitype embedded wide band diversity antenna for dual-mode dual-standby mobile phone

Info

Publication number: CN201063360Y
Application number: CNU2007201556250U
Authority: CN
Inventors: 张声陆; 冯帅; 陈骊
Original assignee: SKYCROSS ELECTRONIC (SHENZHEN) CO Ltd
Current assignee: SKYCROSS ELECTRONIC (SHENZHEN) CO Ltd
Priority date: 2007-07-18
Filing date: 2007-07-18
Publication date: 2008-05-21
Anticipated expiration: 2017-07-18

Abstract

A small built-in wide-frequency diversity antenna for a dual-mode dual-standby mobile phone comprises a main antenna (1), an auxiliary antenna (2) and a bracket (3). The utility model is characterized in that: the main antenna and the auxiliary antenna are both monopole antennas, a sheet shaped main antenna body (11) and an auxiliary antenna body (21) are respectively fixed on the upper parts of the two sides of the bracket; a main antenna feed point and an auxiliary antenna feed point are respectively positioned at the corresponding bottoms of the bracket, and connected with the main antenna body and the auxiliary antenna body correspondingly above through a main antenna feed leg (12) and an auxiliary antenna feed leg (22), a grounded isolator (4) is arranged between the main antenna and the auxiliary antenna. The utility model adopts a Monopole type antenna of single feed point inverse MLA, and has the advantages of simple structure, multi-frequency fulfillment, small cubage, and good isolation between the main antenna and the auxiliary antenna.

Description

The small-sized built-in wideband diversity antenna that is used for double model double standby phone

Technical field

The utility model belongs to a kind of antenna, is specifically related to that a kind of to be used for two SIM card be the small-sized built-in wideband diversity antenna that double-module double-standby is used.

Background technology

The mobile phone of dual-mode dual-standby comes into the market in a large number at present, and the design space that this class mobile phone is reserved to antenna is fewer and feweri, and the application band that requires two antennas to cover is more, and this has just brought difficulty to Antenna Design.

Antenna for mobile phone for having used in the market mostly is little shape antenna usually, and this class antenna generally has bipolar subtype, or the one pole subtype, planar inverted F type antenna (PIFA) etc.For bipolar subtype, modal is helical antenna, and this type of antenna can only be used for the external antenna that pcmcia card or little shape are carried wireless electronic product (as mobile phone) because of the size reason.And closely one or two years, the multifrequency built-in aerials were disposed in many requirements owing to the requirement in market, thereby it is widely-used that the PIFA antenna has been obtained.But no matter be classical or various improved PIFA antennas, and folding π type antenna or monopole antenna all are subjected to the restriction of bandwidth, all can not cover all ranges of application, the built-in aerial of existing mobile phone, mostly be double-fed point type, as PIFA (Planar Inverted-F Antenna) type and modified model thereof.The characteristics of PIFA are to want cube bigger.Therefore for the double model double standby phone that requires to be used for multifrequency (double frequency, three frequencies or four are frequently), PIFA type antenna is just no longer suitable.

Summary of the invention

The technical problems to be solved in the utility model provide a kind of volume little, can satisfy the small-sized built-in wideband diversity antenna that is used for double model double standby phone that multifrequency requires, isolation is good.

The technical scheme that addresses the above problem is (referring to implementing illustration): the utility model is provided with main antenna (1), slave antenna (2) and support (3), it is characterized in that: described main antenna and slave antenna are monopole antenna, sheet main antenna main body (11) and slave antenna main body (21) are separately fixed at support two upper lateral parts, main antenna distributing point and slave antenna distributing point lay respectively at corresponding frame bottom, and be connected with the slave antenna main body with slave antenna feed leg (22) the main antenna main body corresponding by main antenna feed leg (12) respectively with top, between main antenna and slave antenna, be provided with the slider (4) of ground connection.

Mutual coupling between many antennas mainly is to be made of the near field that produces near the position each other, the ground connection slider that the utility model is provided with between the major-minor antenna, can make electric field strength (E1), (E2) direction that slider both sides antenna produces over the ground opposite, cancel out each other, reduce the mutual coupling between two antennas, thereby raising isolation, this mode can improve 1 to 2 decibel of isolation.

The utility model adopts single feed point, is inverted MLA (Meander Line Antenna) Monopole type antenna, has simple in structurely, can satisfy that multifrequency requires, volume is little, and the good advantage of isolation between the major and minor antenna.

Description of drawings

Fig. 1, the utility model example structure schematic diagram

Fig. 2, this Fig. 1 embodiment disassembled form structural representation

1-main antenna 11-main antenna main body 12-main antenna feed leg

2-slave antenna 21-slave antenna main body 22-slave antenna feed leg

3-support 4-ground connection slider

Embodiment

Present embodiment be used for two SIM card now commonly used be double-module double-standby use small-sized built-in wideband diversity antenna.

The main part of major and

minor antenna

1,2 is separately fixed on the face of putting on the shelf of support 3 and arranged on left and right sides, and two antenna feed points are located at frame bottom, is connected with the antenna body on top by main antenna feed leg 12, slave antenna feed leg 22 respectively.

In order to satisfy the low-and high-frequency requirement to antenna, the design of the monopole of elongated wire has promptly been adopted in the major and minor design of all adopting the arrowband monopole.

The major and minor antenna of sheet is provided with the slit that extends from the inside broken line shape of leading edge, makes major and minor antenna be the broken line body.

The HFS of main antenna 1 be and feed leg 12 anterior from antenna body connecting portion inwardly, backward, outward extending short broken line body 13 again, low frequency part be and feed leg 12 anterior from antenna body connecting portion outwards, backward, inwardly extend forward again, the broken line body 14 that will shorter HFS 13 surrounds;

The broken line body 23 that the HFS of slave antenna 2 extends back for connecting portion anterior from antenna body and feed leg 22, low frequency part be and feed leg 22 anterior from antenna body connecting portion inwardly, backward, outwards extend forward again, the broken line body 24 that will shorter HFS 23 surrounds;

Said structure makes the inboard adjacent regions 141,241 of major and minor antenna be opposite trend.

Main antenna 1 is the three-frequency antenna of 900/1800/1900MHZ, and slave antenna 2 is the two frequency antennas of 900/1800MHZ.

Be provided with ground connection slider 4 between the major and minor antenna, these routine slider 4 one ends are connected with the earth terminal of antenna lower circuit plate, the other end extends between the adjacent inside edge of the major and minor antenna in support top, make the adjacent inside line of major and minor antenna 141,241 be the state that direction is opposite, cancel out each other to electric field E1, the E2 of slider 4, reduced the mutual coupling between two antennas, can make the isolation between the major and minor antenna improve 1 to 2 decibel.

Slider 4 will be set its particular location between the major-minor antenna according to the environmental factors such as circuit board of major and minor antenna, bottom.

The major-minor antenna adopts the stainless steel steel, consider reason cheaply, with single sheet metal pressed form of using, be installed on the support 3 of plastic material, earlier hot melt reference column on the support and the location hole on the antenna matched, the antenna hot melt is fixed on the support, prevent the antenna perk, support is fixed on the pcb board by Elastic buckle again, guarantees that the feed leg of antenna and the feed pad position on the PCB align, making between antenna and distributing point has excellent contact.

The environment that the mobile phone that will use from this antenna is given is considered, if use the PIFA form, though each antenna can satisfy performance demands, when working, reciprocal influence is just very big together, be enough to offset performance separately, so finally select this routine unipole antenna for use, actual effect is well more a lot of than common PIFA antenna, has single feed point, simple in structure, can satisfy that multifrequency requires, volume is little, and the good advantage of isolation between the major and minor antenna.

The above; it only is preferred embodiment of the present utility model; be not that the utility model is done any pro forma restriction; every foundation technical spirit of the present utility model all still belongs to the protection range of technical solutions of the utility model to any simple modification, equivalent variations and modification that above embodiment did.

Claims

1. the small-sized built-in wideband diversity antenna that is used for double model double standby phone, be provided with main antenna (1), slave antenna (2) and support (3), it is characterized in that: described main antenna and slave antenna are monopole antenna, sheet main antenna main body (11) and slave antenna main body (21) are separately fixed at support two upper lateral parts, main antenna distributing point and slave antenna distributing point lay respectively at corresponding frame bottom, and be connected with the slave antenna main body with slave antenna feed leg (22) the main antenna main body corresponding by main antenna feed leg (12) respectively with top, between main antenna and slave antenna, be provided with the slider (4) of ground connection.

2. the small-sized built-in wideband diversity antenna that is used for double model double standby phone according to claim 1, it is characterized in that: described ground connection slider (4) one ends are connected with the earth terminal of antenna lower circuit plate, and the other end extends between the adjacent inside edge of the major and minor antenna in support top.

3. the small-sized built-in wideband diversity antenna that is used for double model double standby phone according to claim 1 and 2 is characterized in that: the described inboard adjacent regions of major and minor antenna (141,241) is opposite trend.

4. the small-sized built-in wideband diversity antenna that is used for double model double standby phone according to claim 3, it is characterized in that: the HFS of described main antenna (1) for the connecting portion of and feed leg (12) anterior from antenna body inwardly, backward, outward extending short broken line body (13) again, low frequency part be and feed leg (12) anterior from antenna body connecting portion outwards, backward, inwardly extend forward again, the broken line body (14) that will shorter HFS (13) surrounds; The broken line body (23) that the HFS of described slave antenna (2) extends back for connecting portion anterior from antenna body and feed leg (22), low frequency part be and feed leg (22) anterior from antenna body connecting portion inwardly, backward, outwards extend forward again, the broken line body (24) that will shorter HFS (23) surrounds.