CN201117798Y

CN201117798Y - Double frequency antenna

Info

Publication number: CN201117798Y
Application number: CNU2007200562019U
Authority: CN
Inventors: 林敬基; 苏嘉宏; 施凯; 吴裕源
Original assignee: Foxlink Electronics Dongguan Co Ltd; Cheng Uei Precision Industry Co Ltd
Current assignee: Foxlink Electronics Dongguan Co Ltd; Cheng Uei Precision Industry Co Ltd
Priority date: 2007-08-24
Filing date: 2007-08-24
Publication date: 2008-09-17
Anticipated expiration: 2017-08-24

Abstract

The utility model discloses a double-frequency antenna. The double-frequency antenna comprises a grounding part, a first radiation part, a second radiation part and a feed-in part. The first radiation part is connected with the grounding part through a bridging part and a connection board, one end of the second radiation part is connected with the first radiation part, and the other end is connected with the feed-in part, wherein, the integral structure of the first radiation part is of a bending shape and is arranged in parallelism to the connection board, and the second radiation part is also of a bending extension-shaped structure. The double-frequency antennal forms a loop antenna through the feed-in part, the grounding part, the first radiation part and the second radiation part, which can resonate a frequency band of 2.4 GHz and can also harmonically oscillate a frequency band of 5.2 GHz. Since the double-frequency antenna of the utility model is of an integral-typed design, and two radiation parts of the antenna are of bending structure, the volume of the double-frequency antenna can be greatly reduced, thereby being applicable to the research and development trend of the small orientation of the electronic product.

Description

Dual-band antenna

Affiliated technical field

The utility model relates to a kind of antenna, relates in particular to a kind of dual-band antenna that is applied on the electronic products such as notebook computer.

Background technology

Along with WLAN (WLAN (wireless local area network)) is widely used in the modern mobile office environment, as all being equipped with antenna on the portable type electronic products such as notebook computer to realize the emission and the reception of wireless signal.The communications protocol that is widely used in WLAN (wireless local area network) now mainly comprises IEEE802.11a and two kinds of standards of IEEE802.11b, and wherein the working frequency range of IEEE802.11a is 2.4-2.5GHz, and the working frequency range of IEEE802.11b is 5.15-5.35GHz.

Be the working frequency range that makes antenna assembly have IEEE802.11a and two kinds of standards of IEEE802.11b simultaneously, industry has been developed dual-band antenna to reach the purpose of the wireless signal of receiving and dispatching above-mentioned two kinds of standard operation frequency ranges.The United States Patent (USP) of bulletin just disclosed a kind of dual-band antenna that is used for notebook computer the 7th, 196, No. 668 as on March 27th, 2007.This dual-band antenna has one first antenna, an antenna array module and a wireless WLAN module.Antenna array module comprises a plurality of second antennas and is connected to a plurality of antenna connectors of these second antennas, wherein, keeps at a certain distance away between described these second antennas.First antenna of this dual-band antenna and a plurality of second antenna work in the working frequency range of IEEE802.11a and IEEE802.11b standard respectively.

But, because a plurality of second antennas of dual-band antenna are to keep at a certain distance away to be provided with, thereby antenna volume is bigger, and the electronic product of using this dual-band antenna also must reserve bigger space and install this dual-band antenna, and does not just meet the development trend of current miniaturization of electronic products like this.

The utility model content

The purpose of this utility model is to provide a kind of dual-band antenna with smaller size smaller at the defective that above-mentioned prior art exists.

For achieving the above object, the utility model dual-band antenna comprises grounding parts, connecting plate, first Department of Radiation, bridge part, second Department of Radiation and feeding portion.This connecting plate is long strip-board shape and is connected with grounding parts.This first Department of Radiation is back and forth bending extension shape and keeps at a certain distance away and parallel this connecting plate setting with described connecting plate.This bridge part is connected with connecting plate with an end of first Department of Radiation respectively.This second Department of Radiation is vertically connected on the other end of first Department of Radiation, and this second Department of Radiation is bending extension shape back and forth on the bearing of trend of first Department of Radiation.This feeding portion is connected the end of second Department of Radiation.

The feeding portion of the utility model dual-band antenna, grounding parts, first Department of Radiation and second Department of Radiation form a loop antenna, this loop antenna frequency band of containing 2.4GHz that can resonate out; But the electrical equipment length of this second Department of Radiation goes out a frequency band of containing 5.2GHz for resonance.Because the utility model dual-band antenna is three-dimensional design, and its two Department of Radiation is the bending structure setting respectively, thereby can reduce the volume of this dual-band antenna greatly, adapts to the research and development trend of miniaturization of electronic products.

Description of drawings

In Figure of description:

Fig. 1 is the stereogram of the utility model dual-band antenna.

Fig. 2 is the stereogram of another angle of the utility model dual-band antenna.

Fig. 3 is the resolution chart of the voltage standing wave ratio of the utility model dual-band antenna.

The description of reference numerals of each element is as follows among the figure:

Dual-band antenna 1 first Department of Radiation 10

First end 11 the second ends 12

First kink, 13 second Departments of Radiation 20

The 4th end 22, the 3rd end 21

Second kink, 23 grounding parts 30

Linking arm 31 weld parts 32

Extension 33 connecting plates 34

Bridge part 35 feeding portions 40

Extension 41 linkage sections 42

Embodiment

By describing technology contents of the present utility model, structural feature in detail, realized purpose and effect, below give explanation especially exemplified by embodiment and conjunction with figs. are detailed.

See also Fig. 1 and Fig. 2, the utility model dual-band antenna 1 comprises first Department of Radiation 10, second Department of Radiation 20, grounding parts 30 and feeding portion 40 for conductive sheet forms through the punching press bending.

This grounding parts 30 is horizontally disposed long strip-board shape, and it has the first relative end and second end.First end forms a linking arm 31 to the rear side horizontal-extending.This linking arm 31 is provided with perpendicular to grounding parts 30, and its end bends straight up and extend to form a weld part 32, and this weld part 32 is in order to be welded in the utility model dual-band antenna 1 on the corresponding electronic product (figure does not show).

At the second end place near grounding parts 30, this grounding parts 30 horizontal-extending backward forms an extension 33.The end of this extension 33 bends and extends to form to both sides the connecting plate 34 that is long strip-board shape straight up.One end of this connecting plate 34 extends to second end of ground plate 30 and flushes, the other end freely extends to first extreme direction of ground plate 30, and the length of this connecting plate 34 is as the criterion with the required length of working frequency range that satisfies the utility model dual-band antenna 1 resonance and go out WLAN (wireless local area network).After the upside of this connecting plate 34 upwards extends perpendicularly to the height that flushes described weld part 32 along the second end place in close grounding parts 30, bending and horizontal-extending form a bridge part 35 backward again, and this bridge part 35 extends to end with described linking arm 31 place that flushes.

The end of bridge part 35 bends and extends to the plane at grounding parts 30 places straight down and forms the first end 11 of a rectangular plate shape.Side towards grounding parts 30 first ends of this first end 11 connects first kink 13 that bends back and forth up and down along the upper end.This first kink 13 side of vertical described first end 11 earlier extends along also parallel connecting plate 34, then be bent to the plane at grounding parts 30 places more straight down, and then after first end of grounding parts 30 vertically bends extension, bend and extend to the height that flushes with the upper end of first kink 13 straight up, vertically bend extension towards grounding parts 30 first ends more at last and form.These first kink, 13 terminal the second ends 12 that connect a rectangle, this second end 12 be arranged in parallel side by side with described first end 11, and promptly the second end 12 is in the same plane and keeps at a certain distance away with first end 11 and be arranged in parallel.This first end 11, the second end 12 and first kink 13 are therebetween formed first Department of Radiation 10, and this first Department of Radiation 10 is provided with for being parallel to connecting plate 34.

The upper end level of the second end 12 bends forward and towards second Department of Radiation 20 parallel with grounding parts 30 that extend of first end of grounding parts 30.This second Department of Radiation 20 has the 3rd end 21 that is horizontally disposed with and is connected with the second end 12, and the length of the length of the 3rd end 21 and bridge part 35 about equally.The 3rd end 21 second kink 23 of bending back and forth before and after the front end towards a side edge of first end of grounding parts 30 is connected with.The similar of this second kink 23 and aforesaid first kink 13, they are different is in the number of times that the number of times that second kink 23 bends back and forth bends back and forth more than first kink 13.The end of second kink 23 is connected with the 4th horizontally disposed, a rectangular end 22.The 4th end 22 be arranged in parallel side by side with described the 3rd end 21.The 3rd end 21, the 4th end 22 and second kink 23 are formed described second Department of Radiation 20, and the electrical equipment length of this second Department of Radiation 20 equals a wavelength of four minutes of 5.2GHz frequency band.

22 rear ends, the 4th end bend straight down and are extended with an extension 41 to first extreme direction of grounding parts 30.This extension 41 extends to contiguous weld part 32 places, and the downside of extension 41 extends a linkage section 42 that is " U " along locating to extend downwards more upwards bending, and the free end of this linkage section 42 extends upwardly to the upper end of this weld part 32 and flushes the place.The free end of this linkage section 42 level forward is bent to form a feeding portion 40, imports for receiving electromagnetic wave signal.

The grounding parts 30 of the utility model dual-band antenna 1, first Department of Radiation 10 and second Department of Radiation 20 form a loop antenna, and the electrical equipment length of this loop antenna is two minutes the wavelength of 2.4GHz.When 1 work of the utility model dual-band antenna, electric current is by feeding portion 40 feed-ins, make the loop antenna of forming by first Department of Radiation 10, second Department of Radiation 20 and grounding parts 30 resonate out a 2.412GHz, and go out one by second Department of Radiation, 20 resonance and contain the frequency band of 4.900GHz to 5.875GHz to the frequency band of 2.462GHz.Therefore, the utility model dual-band antenna 1 can be contained IEEE802.11a and two kinds of employed frequency ranges of standard of IEEE802.11b of WLAN (wireless local area network).

See also Fig. 3, voltage standing wave ratio (VoltageStanding Wave Ratio, test result figure VSWR) when this figure is 1 work of the utility model dual-band antenna.When the utility model dual-band antenna 1 worked in 2.412GHz (as number in the figure 1), 2.462GHz (as number in the figure 2), 4.900GHz (as number in the figure 3) and 5.875GHz (as number in the figure 4) respectively, its voltage standing wave ratio (VSWR) was all less than 3.

As shown in the above description, the utility model dual-band antenna 1 is by the three-dimensional design of grounding parts 30, first Department of Radiation 10, second Department of Radiation 30 and feeding portion 40, dual-band antenna 1 occupied area and volume have been reduced, thereby effectively reduced antenna structure needed space when in electronic product, being provided with, satisfied the development trend of current miniaturization of electronic products.

In sum, the utility model dual-band antenna is by above-mentioned structure, can realize the function of expecting, and application of the present utility model conforms with the important document of patent, so file an application in accordance with the law.But, above disclosed, only be a preferred embodiment of the present utility model, should not limit interest field of the present utility model with this.Modification or variation as for other equivalence of the present utility model also should be encompassed in the claim of the present utility model.

Claims

1. a dual-band antenna is characterized in that, this dual-band antenna comprises:

One grounding parts;

A plate, this connecting plate are a long strip-board shape and are connected with grounding parts;

One first Department of Radiation, this first Department of Radiation are back and forth bending and extend shape, and keep at a certain distance away with described connecting plate and be parallel to this connecting plate setting;

One bridge part, this bridge part are connected with connecting plate with an end of first Department of Radiation respectively;

One second Department of Radiation, this second Department of Radiation is vertically connected on the other end of first Department of Radiation, and this second Department of Radiation is bending extension shape setting back and forth on the bearing of trend of first Department of Radiation; And

One feeding portion, this feeding portion is connected the end of second Department of Radiation.

2. dual-band antenna according to claim 1 is characterized in that: described grounding parts is horizontally disposed long strip-board shape.

3. dual-band antenna according to claim 2 is characterized in that: an end of described grounding parts forms a linking arm to a side horizontal-extending, and this linking arm end bends vertically upward and extends a weld part.

4. dual-band antenna according to claim 1 is characterized in that: the described second Department of Radiation end upwards bends the linkage section that extends one " U " shape straight down more forward, and the free end level of this linkage section bends forward extends described feeding portion.

5. dual-band antenna according to claim 1 is characterized in that: described first Department of Radiation is perpendicular to described grounding parts setting, and it comprises a first end, a second end and is connected first kink between these both ends.

6. dual-band antenna according to claim 5 is characterized in that: the integral body of described second Department of Radiation is parallel to described grounding parts setting, comprises one the 3rd end, one the 4th end and is connected second kink between these both ends.

7. dual-band antenna according to claim 1 is characterized in that: described connecting plate upwards protrudes out and level bends backward and extends described bridge part.

8. dual-band antenna according to claim 7 is characterized in that: described bridge part and this connecting plate are vertical setting.

9. dual-band antenna according to claim 7 is characterized in that: an end of described connecting plate extends to an end of grounding parts and flushes the place.