CN201063361Y

CN201063361Y - Low posture multi-frequency minitype embedded diversity antenna for EC network card

Info

Publication number: CN201063361Y
Application number: CNU2007201520441U
Authority: CN
Inventors: 陈骊
Original assignee: SKYCROSS ELECTRONIC (SHENZHEN) CO Ltd
Current assignee: SKYCROSS ELECTRONIC (SHENZHEN) CO Ltd
Priority date: 2007-06-20
Filing date: 2007-06-20
Publication date: 2008-05-21
Anticipated expiration: 2017-06-20

Abstract

A low attitude multi-frequency small built-in diversity antenna for an EC network card comprises a main antenna (1), an auxiliary antenna (2) and a bracket, wherein, 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 outside walls of a first frame body (31) and a second frame body (32) of the two sides of the bracket; a main antenna feed point (12) and an auxiliary antenna feed point (22) are respectively positioned at the bottom surfaces of the first frame body and the second frame body, extended upwards and outwards along the inside walls of the corresponding frame bodies through a main antenna connecting sheet (13) and an auxiliary antenna connecting sheet (23), and connected with the main antenna body and the auxiliary antenna body correspondingly into a whole; the widths of the main antenna connecting sheet and the auxiliary antenna connecting sheet from the feed points to the corresponding antenna bodies are changed from small to large, and the auxiliary antenna body (21) assumes a shape of an indirect broken line. The utility model has the advantages of small cubage, low cost, multi-frequency covering capability and good isolation between the main antenna and the auxiliary antenna.

Description

A kind of small-sized built-in diversity antenna of low form multifrequency that is used for the EC network interface card

Technical field

The utility model belongs to a kind of antenna, is specifically related to a kind of small-sized built-in aerial that is used for fast wireless network interface card EC (ExpressCard) or PMCIA data card.

Background technology:

The EC of present 34 mm wides (Express Card) card comes into the market, and it much smaller than the width of existing pcmcia card, and requires the application band that covers many on volume, and this has brought new difficulty to Antenna Design.Antenna for the small-sized built-in super wideband diversity antenna/mobile phone of the PMCIA data card that has used in the market mostly is small size antenna usually, and this class antenna generally has bipolar subtype, one pole subtype or 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, popular pcmcia card or little shape were carried wireless electronic product (mobile phone) the configuration multifrequency built-in aerials that require more 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 be subjected to the restriction of bandwidth, can not cover all ranges of application.

Summary of the invention

The technical problems to be solved in the utility model provides that a kind of volume is little, cost is low, and the small-sized built-in diversity antenna of low form multifrequency that is used for the EC network interface card of multifrequency application function is arranged.

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 on the lateral wall of first support body (31) of support both sides and second support body (32), main antenna distributing point (12) and slave antenna distributing point (22) lay respectively at the bottom surface of first support body and second support body, and make progress by main antenna brace (13) and slave antenna brace (23) madial wall respectively along the place support body, stretch out again, be connected as a single entity with corresponding main antenna main body and slave antenna main body, described main antenna brace (13) and the width of slave antenna brace (23) from distributing point to the respective antenna main body change from small to big, and described slave antenna main body (21) is circuitous polyline shaped.

The utility model main antenna guarantees the low frequency frequency response by the bigger sheet main antenna main body (11) of its area, the antenna body part is long more, wide more, its resonance frequency is low more and bandwidth is wide more, brace (13) width between distributing point and main antenna main body changes from small to big, can guarantee the bandwidth of broad, the bandwidth of front end particularly, thus by above-mentioned main antenna dimerous can so that antenna simultaneously resonance in high and low frequency range.

It is the low frequency arrowband that slave antenna of the present utility model requires, so adopted arrowband monopole structure to add the design of broken line, promptly slave antenna main body (21) has adopted the monopole structure of elongated circuitous polyline shaped.The broken line length of this monopole can be selected long enough, so that its resonance is 800,000,000, and can utilize the harmonic wave of its high-frequency resonant, but only the second harmonic with the monopole broken line can't cover required bandwidth, so the utility model slave antenna has also designed the brace that width changes from small to big between distributing point and slave antenna main body, so that slave antenna has the high frequency bandwidth of broad, so the utility model slave antenna

Simultaneously in order to improve the isolation between the diversity antenna, the utility model has adopted back-to-back form to the distributing point of major and minor antenna, and be added with floor (referring to Fig. 6) in the middle of two distributing points, near field field intensity between the major and minor antenna is cancelled out each other, reduced the mutual coupling between two antennas, two isolation between antennaes have been improved

The advantage that the utlity model has that volume is little, cost is low, can cover multiband, the major-minor isolation between antennas is good.

Description of drawings

Fig. 1, the utility model example structure schematic diagram

The A of Fig. 2, Fig. 1 is to structural representation

The B of Fig. 3, Fig. 1 is to structural representation

Fig. 4, Fig. 1 embodiment disassembled form structural representation

Fig. 5, Fig. 2 embodiment disassembled form structural representation

Fig. 6, the utility model embodiment are provided with the structural representation on floor between two distributing points

Fig. 7, the utility model embodiment antenna and pcb board electric connection structure schematic diagram

1-main antenna 11-main antenna main body 12-main antenna distributing point 13-main antenna brace 14-ennation

2-slave antenna 21-slave antenna main body 22-slave antenna distributing point 23-slave antenna brace 24-slit

The 3-support 31-first support body 32-second support body 33-hot melt post

4-antenna feed point Gold plated Layer 5-shell fragment 6-PCB plate 7-PCB plate distributing point 8-floor

Specific embodiments

This routine support 3 takes the shape of the letter U, and U-shaped support two arms are respectively described first support body 31 and second support body, 32 described main antennas 1 and slave antenna 2 and are contained in respectively on two support bodys.

Main antenna 1 is a monopole antenna, sheet main antenna main body 11 roughly is rectangular rectangle (referring to Fig. 5), be contained on the support first support body lateral wall, and be provided with the ennation 14 of wall buckling backward, be used for regulating frequency, main antenna distributing point 12 is located at first support body, 31 bottom (see figure 3)s, by main antenna brace 13 upwards along the first support body madial wall, stretch out again, be connected as a single entity with main antenna main body 11, the width of main antenna brace 13 from distributing point to the main antenna main body changes from small to big, to add broadband.

Slave antenna 2 also is a monopole antenna, slave antenna main body 21 is contained on support second support body 32 lateral walls, slave antenna main body 21 is roughly rectangular, the slit 24 interleaved by edge, the left and right sides forms circuitous broken line shape structure, by adjusting its elongated circuitous broken line length, can make its resonance in required low-frequency range, slave antenna distributing point 22 is located at the second support body bottom surface, by slave antenna brace 23 upwards along the second support body madial wall, stretch out again, be connected as a single entity with slave antenna main body 21, the width of slave antenna brace 23 from distributing point to the slave antenna main body changes from small to big, and makes slave antenna that the high frequency bandwidth of broad be arranged.

The bandwidth of this routine main antenna low frequency can guarantee to cover simultaneously 800,000,000 and 900,000,000, and the bandwidth of high frequency can guarantee to cover simultaneously whole frequency ranges of 1,800 million and 1,900 million and 2,100 million, forms 5 frequency antennas.Slave antenna can cover the application of 800 megahertzes, 1575 megahertzes, 1900 megahertzes and four frequency ranges of 2100 megahertzes.Simultaneously this antenna also has characteristics to be: its distributed capacitance and distributed inductance can make it that a unnecessary resonance is arranged, thereby make its adjustable extent be enough to cover the frequency range of global position system (GPS).”

Referring to Fig. 6, the feed trend of this routine major and minor antenna is back-to-back form, and between antenna bottom main antenna distributing point 12 and slave antenna distributing point 22, be provided with floor 8, so main antenna to ground electric field E1 and slave antenna to ground electric field E2 be that direction is opposite in the horizontal direction, the field intensity in major and minor antenna this part near field is cancelled out each other, and the mutual coupling of antenna mainly is made of this part near field, so this example can reduce the mutual coupling between two antennas, has improved isolation.This mode is drawn back the mode of two distributing point distances as far as possible and is compared with common employing, can make the isolation of antenna improve 1 to 2 decibel.

Because the processing, the particularly processing of the slave antenna of the form of broken line MLA of the utility model antenna, singly use the sheet metal pressed form, be difficult to realization, even if or realized, also cannot say for sure precision.So this routine antenna has adopted the form of FPC.But FPC has the weakness of a maximum, promptly very difficult realization antenna is electrically connected with PCB's, therefore, the electric connection structure of this routine major and minor antenna and pcb board is: be respectively equipped with Gold plated Layer 4 with the bottom main antenna distributing point 12 and the slave antenna distributing point 22 of pcb board 6 relatively-stationary antennas, on the main antenna distributing point of pcb board 6 and slave antenna distributing point 7, be welded with small-sized shell fragment 5 respectively, elasticity is withstood the Gold plated Layer 4 of respective antenna distributing point, makes to realize between them being electrically connected very reliably.

The fixed form of this routine antenna and support is: with main antenna, slave antenna sticks on the rack outer surface, and the corresponding hot melt post 33 on the hot melt support then is to prevent the antenna perk.After antenna and the pcb board relative fixed, the Gold plated Layer 4 of its underpart distributing point is the shell fragment on the corresponding distributing point 5 on the elastic compression pcb board, makes the two reliable electrical connection.

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. small-sized built-in diversity antenna of low form multifrequency that is used for the EC network interface card, 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 on the lateral wall of first support body (31) of support both sides and second support body (32), main antenna distributing point (12) and slave antenna distributing point (22) lay respectively at the bottom surface of first support body and second support body, and make progress by main antenna brace (13) and slave antenna brace (23) madial wall respectively along the place support body, stretch out again, be connected as a single entity with corresponding main antenna main body and slave antenna main body, described main antenna brace (13) and the width of slave antenna brace (23) from distributing point to the respective antenna main body change from small to big, and described slave antenna main body (21) is circuitous polyline shaped.

2. kind according to claim 1 is used for the small-sized built-in diversity antenna of low form multifrequency of EC network interface card, it is characterized in that: described support (3) takes the shape of the letter U, U-shaped support two arms are respectively described first support body (31) and second support body (32), and described main antenna (1) and slave antenna (2) are contained in respectively on two support bodys.

3. kind according to claim 1 is used for the small-sized built-in diversity antenna of low form multifrequency of EC network interface card, it is characterized in that: described sheet main antenna main body (11) roughly is rectangular rectangle, is contained on support first support body (31) lateral wall.

4. kind according to claim 1 is used for the small-sized built-in diversity antenna of low form multifrequency of EC network interface card, it is characterized in that: described slave antenna main body (21) is contained on support second support body (32) lateral wall, slave antenna main body (21) is roughly rectangular, forms circuitous broken line shape structure by the interleaved slit in edge, the left and right sides (24).

5. kind according to claim 1 is used for the small-sized built-in diversity antenna of low form multifrequency of EC network interface card, it is characterized in that: be provided with floor (8) between described main antenna distributing point (12) and the slave antenna distributing point (22).

6. kind according to claim 1 is used for the small-sized built-in diversity antenna of low form multifrequency of EC network interface card, it is characterized in that: the electric connection structure of described major and minor antenna and pcb board is: be respectively equipped with Gold plated Layer (4) with the bottom main antenna distributing point (12) and the slave antenna distributing point (22) of the relatively-stationary antenna of pcb board (6), be welded with small-sized shell fragment (5) respectively on the main antenna distributing point of pcb board (6) and slave antenna distributing point (7), elasticity is withstood the Gold plated Layer (4) of respective antenna distributing point.