CN200969401Y

CN200969401Y - Single feed point small-sized embedded multi-frequency diversity antenna for data card

Info

Publication number: CN200969401Y
Application number: CN 200620159911
Authority: CN
Inventors: 冯帅
Original assignee: SKYCROSS ELECTRONIC (SHENZHEN) CO Ltd
Current assignee: SKYCROSS ELECTRONIC (SHENZHEN) CO Ltd
Priority date: 2006-11-21
Filing date: 2006-11-21
Publication date: 2007-10-31
Anticipated expiration: 2016-11-21

Abstract

Provided is a single fed point miniature inner multi-frequency antenna for data card, which is provided with a flake antenna main body (1), a feed electric point (5), the antenna is characterized in that the width of the antenna main body (1) increases from the front end (A) to the post end (B), the antenna main body is fixed on the level direction upper frame surface of the frame (2), the anterior part of the antenna main body bends downward to form an anterior bending body (11), the upper part of the anterior bending body (11) is provided with an extending downward pin (3), the feed electric point (5) is arranged on the lower part of the pin (3), and is electrically connected with the signal input and output ends of the circuit board by the matching circuit composed of the perceptual element (L1,L2), the capacity element (C1,C2). The utility model is low in volume, and well solves the problem that the conventional antenna designed bandwidth is inadequate, meanwhile the utility model has the advantages of good antenna radiation performance, quite high efficiency.

Description

The small-sized built-in multifrequency antenna of single feed point that is used for data card

Technical field

The utility model belongs to a kind of antenna, especially for the small-sized built-in aerial of single feed point of PMCIA or EVDO data card.

Background technology

The antenna that is used for pcmcia card/mobile phone at present mostly is little shape antenna, 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, 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 a kind of have ultra wide bandwidth characteristic, the small-sized built-in multifrequency antenna of the single feed point that is used for data card that volume is little.

The technical scheme that addresses the above problem is (referring to implementing illustration): the utility model is provided with chip aerial main body (1), distributing point (5), it is characterized in that: (B) width is cumulative to the back-end from front end (A) for described antenna body (1), antenna body be fixed on support (2) level to the face of putting on the shelf on, its anterior bending downwards, bending body (11) before forming, preceding bending body (11) is provided with the pin (3) of downward extension near the position on top, described distributing point (5) is located at pin (3) lower end, and pass through by inductive element (L1, L2), (C1, C2) match circuit of Zu Chenging is electrically connected with the signal input output end of circuit board capacitive element.

Further scheme is: described match circuit comprises inductance (L1), electric capacity (C2) in parallel, electric capacity (C1), the inductance (L2) of series connection, antenna body is by distributing point elder generation shunt inductance (L1), series capacitance (C1), shunt capacitance (C2), series inductance (L2) again.

Common antenna always designs on desired frequency, if do not accomplish also to design in its vicinity as far as possible, even if multifrequency also is like this.The track lengths of antenna need be very long in the design low-frequency range so if by this conventional method low-and high-frequency is separated design, when being restricted in the space, and just very difficult the realization.If firmly low-frequency range move to want on the frequency band, a day line width is attenuated, the problem of bringing bandwidth to narrow down so again.

This antenna has adopted and conventional diverse ways, Frequency Design is being higher than low frequency and is being lower than high frequency treatment, antenna frequencies covers 5 frequency ranges, and volume is very little, the structure of antenna body is: whole chip aerial is as a whole, pass through and adopt the cumulative structure of width, this structure has very wide bandwidth, and can utilize its first harmonic and frequency multiplication to make antenna resonance between desired low frequency and high frequency, and then by match circuit the extraordinary resonance branch of this bandwidth is drawn back, form two resonance.A resonance is in needed low frequency frequency range, and a resonance is in needed high-frequency band.

The match circuit that the further scheme of the utility model provides can pass through the low band resonance frequency of shunt inductance, series capacitance adjustment antenna easily, adjusts the high band resonances frequency of antenna by the electric capacity of parallel connection, the inductance of series connection.

The utility model volume is little, has solved the not enough problem of conventional multifrequency antenna design bandwidth well, has the multifrequency bandwidth, antenna radiation performance is good, the advantage that efficient is high.

Description of drawings

Fig. 1, the utility model example structure schematic diagram

The rearview of Fig. 2, Fig. 1

Fig. 3, Fig. 1 embodiment disassembled form schematic diagram

Fig. 4, the utility model embodiment match circuit figure

1-antenna body 2-support 3-pin 4-hot melt post 5-distributing point

Specific embodiments

This routine chip aerial main body 1 from front-end A to the back-end the B width linearity increase progressively, expansion is trapezoidal shape, the level that is fixed on support 2 is on the face of putting on the shelf, and its front portion bends downwards, and the preceding bending body 11 of formation extends to the frame front lower, preceding bending body 11 tops are provided with the pin 3 of downward extension, described distributing point is located at pin 3 bottoms, and pin 3 bends body 11 tops one side in the past and extends forward earlier, extends downwards again, form the bending of projection forward, to improve the elasticity of lead leg 3.Antenna body rear end B is provided with the back bending body 12 that faces down behind the support and extend, and in the downward vast of heaven line length of the prerequisite that does not increase volume, increases its low frequency bandwidth.

The distributing point 5 of pin 3 lower ends is electrically connected with radiofrequency signal input/output terminal on the circuit board by match circuit, match circuit also is arranged on the circuit board, antenna body is by the shunt inductance L1 of distributing point elder generation, series capacitance C1, shunt capacitance C2, series inductance L2 again.By adjusting the resonance frequency that shunt inductance L1, series capacitance C1 adjust the antenna low-frequency range, adjust the resonance frequency of antenna high band by the inductance L 2 of adjusting capacitor C 2 in parallel, series connection.

Antenna body 1 horizontal component has location hole, is fixed on support and puts on the shelf on the face by put on the shelf hot melt post 4 hot melts that are provided with on the face of support.

Claims

1, the small-sized built-in multifrequency antenna of single feed point that is used for data card, be provided with chip aerial main body (1), distributing point (5), it is characterized in that: (B) width is cumulative to the back-end from front end (A) for described antenna body (1), antenna body be fixed on support (2) level to the face of putting on the shelf on, its anterior bending downwards, bending body (11) before forming, preceding bending body (11) is provided with the pin (3) of downward extension near the position on top, described distributing point (5) is located at pin (3) lower end, and pass through by inductive element (L1, L2), (C1, C2) match circuit of Zu Chenging is electrically connected with the signal input output end of circuit board capacitive element.

2, the small-sized built-in multifrequency antenna of single feed point that is used for data card according to claim 1, it is characterized in that: described match circuit comprises inductance (L1), electric capacity (C2) in parallel, electric capacity (C1), the inductance (L2) of series connection, antenna body is by distributing point elder generation shunt inductance (L1), series capacitance (C1), shunt capacitance (C2), series inductance (L2) again.

3, the small-sized built-in multifrequency antenna of single feed point that is used for data card according to claim 1 and 2 is characterized in that: described chip aerial main body (1) from front end (A) to the back-end (B) width linearity increase progressively, launch to be trapezoidal shape.

4, the small-sized built-in multifrequency antenna of single feed point that is used for data card according to claim 1 and 2 is characterized in that: described pin (3) bends body (11) top one side in the past and extends forward earlier, extends downwards again, forms the bending of projection forward.

5, the small-sized built-in multifrequency antenna of single feed point that is used for data card according to claim 1 and 2 is characterized in that: described antenna body rear end (B) is provided with the back bending body (12) that faces down behind the support and extend.