CN202405415U

CN202405415U - Multi-band antenna

Info

Publication number: CN202405415U
Application number: CN 201120557552
Authority: CN
Inventors: 阮伟宏; 吴昀峰
Original assignee: Wistron Neweb Corp
Current assignee: Wistron Neweb Corp
Priority date: 2011-12-28
Filing date: 2011-12-28
Publication date: 2012-08-29
Anticipated expiration: 2021-12-28

Abstract

The utility model relates to a multi-band antenna. The multi-band antenna comprises a ground plane, a feed signal source, a first radiator, a second radiator, a third radiator and a loop-shaped connecting arm, wherein the ground plane is provided with a grounded part; the feed signal source is adjacent to the grounding part; the first radiator and the second radiator are connected to the feed signal source and used for respectively receiving and transmitting signals of which the frequencies are positioned in a high-frequency frequency band and a low-frequency frequency band; the third radiator is connected with the feed singal source and positioned between the second radiator and the ground plane; the loop-shaped connecting arm is provided with an opening, is connected to the grounding part, the first radiator and the second radiator, and is positioned between the first radiator and the ground plane; the opening faces the feed signal source; and the loop-shaped connecting arm is used for ensuring that the third radiator can receive and transmit signals of which the frequencies are positioned in a medium-frequency frequency band. The multi-band antenna has a worldwide interoperability for microwave access (WiMAX) full-frequency-band working function to meet a wideband requirement of WiMAX.

Description

Multifrequency antenna

Technical field

The utility model relates to a kind of multifrequency antenna, refer to especially a kind of use opening towards the loop in FD feed source the shape linking arm to increase the multifrequency antenna of signal transmitting and receiving band limits.

Background technology

Progress along with science and technology; The communication technology is transferred to radio communication from wire communication gradually; And on the transmission media of signal; Then be that to be changed over the air by tangible in the past metallic circuit (like coaxial cable) be the radio communication of propagation medium, its media that is used for receiving and transmitting signal turnover Wireless Telecom Equipment is an antenna.From the above; The design of antenna will influence the speech quality of Wireless Telecom Equipment; And along with the development of various different communication protocol and then expand different communications bands, therefore, integrate various different communication frequency ranges by multifrequency antenna the development of radio communication is become more important.

For instance, United States Patent (USP) the 6th, 812 discloses a kind of multifrequency antenna No. 892, and its relevant design is as shown in Figure 1, and Fig. 1 is the sketch map of a multifrequency antenna 1 of prior art.As shown in Figure 1, multifrequency antenna 1 comprises first Department of Radiation 2, second Department of Radiation 3, grounding parts 5, connecting portion 4 and signal feed 6.Connecting portion 4 is in order to connect first Department of Radiation 2 and second Department of Radiation 3.First Department of Radiation 2, second Department of Radiation 3, grounding parts 5 and connecting portion 4 all are arranged on the same plane.First Department of Radiation 2 and connecting portion 4 constitute one first planar inverted F-antenna; Being used for transmitting-receiving frequency is positioned at the signal of high-frequency band; Second Department of Radiation 3 and connecting portion 4 constitute another planar inverted F-antenna; Being used for transmitting-receiving frequency is positioned at the signal of low frequency frequency range, framework by this, and multifrequency antenna 1 can realize that double frequency receives or emission.

Then, see also Fig. 2, it is the voltage standing wave ratio resolution chart of the multifrequency antenna 1 of Fig. 1, can be known by Fig. 2, and the low frequency bandwidth of multifrequency antenna 1 (voltage standing wave ratio is 3) is about 340MHz, and the bandwidth percentage that it reached is 13.8%.From the above, the multifrequency antenna that uses above-mentioned framework is in the bandwidth work of low frequency modal and can't meet the broadband demand of WiMAX (Worldwide Interoperability for Microwave Access, global microwave access intercommunication property).

The utility model content

Therefore, one of purpose of the utility model be to provide a kind of use opening towards the loop in FD feed source the shape linking arm to increase the multifrequency antenna of signal transmitting and receiving band limits, to solve the above problems.

According to an embodiment, the multifrequency antenna of the utility model comprises: a ground plane, a FD feed source, one first radiant body, one second radiant body, one the 3rd radiant body and a loop shape linking arm; This ground plane has a grounding parts; This FD feed source is adjacent to this grounding parts; This first radiant body is connected in this FD feed source, is used for transmitting-receiving frequency to be positioned at the signal of a high-frequency band; This second radiant body is connected in this FD feed source, is used for transmitting-receiving frequency to be positioned at the signal of a low frequency frequency range; The 3rd radiant body is connected in this FD feed source and between this second radiant body and this ground plane; This loop shape linking arm has an opening and is connected in this grounding parts, this first radiant body and this second radiant body; And between this first radiant body and this ground plane; This opening is towards this FD feed source, but this loop shape linking arm is used for making the 3rd radiant body transmitting-receiving frequency to be positioned at the signal of an intermediate frequency frequency range.

In sum; The utility model uses opening, and the shape linking arm connects the design that first radiant body, second radiant body and ground plane and the 3rd radiant body extend to form from the FD feed source towards the loop in FD feed source; Add the FD feed source and be adjacent to the configuration of grounding parts, but can reach the signal that makes the 3rd radiant body transmitting-receiving frequency be positioned at the intermediate frequency frequency range and produce the purpose that frequency range combines.Thus, through said structure design, the multifrequency antenna that the utility model provided can have WiMAX full frequency band work functions, thereby solves the problem that multifrequency antenna in the prior art can't meet the broadband demand of WiMAX.

Description of drawings

Fig. 1 is the sketch map of the multifrequency antenna of prior art.

Fig. 2 is the voltage standing wave ratio resolution chart of the multifrequency antenna of Fig. 1.

Fig. 3 is the sketch map according to the multifrequency antenna of an embodiment of the utility model.

Fig. 4 is the voltage standing wave ratio resolution chart of the multifrequency antenna of Fig. 3.

The primary clustering symbol description:

1,100 multifrequency antennas, 2 first Departments of Radiation

3 second Departments of Radiation, 4 connecting portions

5,114 grounding parts, 6 signal feed

102 ground planes, 104 FD feed sources

106 first radiant bodies, 108 second radiant bodies

110 the 3rd radiant bodies, 112 loop shape linking arms

116 openings, 118 first arms

120 second arms 122 the 3rd arm

The D spacing

Embodiment

See also Fig. 3; It is the sketch map according to the multifrequency antenna 100 of an embodiment of the utility model; As shown in Figure 3, multifrequency antenna 100 comprises a ground plane 102, a FD feed source 104, one first radiant body 106, one second radiant body 108, one the 3rd radiant body 110 and a loop shape linking arm 112.Ground plane 102 has a grounding parts 114.FD feed source 104 is adjacent to grounding parts 114; In this embodiment; FD feed source 104 preferably is less than or equal to 10mm with a space D of grounding parts 114, and FD feed source 104 is connected to a coaxial transmission line (not being shown in the accompanying drawing) with grounding parts 114, uses the transmitting-receiving of carrying out wireless signal.First radiant body 106 is connected in FD feed source 104, is used for transmitting-receiving frequency to be positioned at the signal of high-frequency band.Second radiant body 108 is connected in FD feed source 104, is used for transmitting-receiving frequency to be positioned at the signal of low frequency frequency range.The 3rd radiant body 110 is connected in FD feed source 104 and between second radiant body 108 and ground plane 102, wherein the 3rd radiant body 110 preferably is parallel to ground plane 102.

Below carry out detailed description to the structural design of loop shape linking arm 112, can be known by Fig. 3, loop shape linking arm 112 has an opening 116 and includes one first arm 118, one second arm 120 and one the 3rd arm 122; 104, the first arms 118 are connected in grounding parts 114, the second arms 120 and are connected in first arm 118 opening 116 towards the FD feed source; The 3rd arm 122 is connected in second arm 120 and first radiant body 106 and second radiant body 108, wherein, and in this embodiment; First arm 118 is parallel to the 3rd arm 122, and with the 3rd arm 122 jointly perpendicular to second arm 120, use forming a ㄈ shape loop; But not limit by this; Loop shape linking arm 112 also can adopt other can form loop shape structure Design, and for instance, loop shape linking arm 112 can change the structural design that adopts first arm 118 only to be parallel to the 3rd arm 122 and be not orthogonal to second arm 120 into; Or change the design of employing arc-shaped structure into; In other words, so long as can form the linking arm design of loop shape structure and its opening, all can be applicable in the utility model towards FD feed source 104.Thus; Via the length of suitably adjusting loop shape linking arm 112 or shape with after producing suitable impedance matching; Add FD feed source 104 and be adjacent to the configuration of grounding parts 114; Loop shape linking arm 112 can produce resonance effects with the 3rd radiant body 110, thereby but makes the 3rd radiant body 110 transmitting-receiving frequencies be positioned at the signal of intermediate frequency frequency range.

By above-mentioned configuration; After through the size of suitably adjusting first radiant body 106, second radiant body 108 and the 3rd radiant body 110; The band limits of the actual receiving and transmitting signal of first radiant body 106, second radiant body 108 and the 3rd radiant body 110 can be as shown in Figure 4, and Fig. 4 is the voltage standing wave ratio resolution chart of the multifrequency antenna 100 of Fig. 3.Can know by Fig. 4; Equal in voltage standing wave ratio under 2 the condition; High-frequency band is 5.15GHz to 5.85GHz; The low frequency frequency range is 2.3GHz to 2.7GHz; The intermediate frequency frequency range is 3.3GHz to 3.8GHz, adds loop shape linking arm 112 and can and produce the effect that above-mentioned high-frequency band, low frequency frequency range and intermediate frequency frequency range are combined with first radiant body 106, second

radiant body

108 and 110 resonance of the 3rd radiant body, thus the antenna (as shown in Figure 4) that multifrequency antenna 100 can be become have WiMAX full frequency band work functions.

Compare prior art; The utility model uses opening, and the shape linking arm connects the design that first radiant body, second radiant body and ground plane and the 3rd radiant body extend to form from the FD feed source towards the loop in FD feed source; Add the FD feed source and be adjacent to the configuration of grounding parts, but can reach the signal that makes the 3rd radiant body transmitting-receiving frequency be positioned at the intermediate frequency frequency range and produce the purpose that frequency range combines.Thus, through said structure design, the multifrequency antenna that the utility model provided can have WiMAX full frequency band work functions, thereby solves the problem that mentioned multifrequency antenna in the prior art can't meet the broadband demand of WiMAX.

The above is merely the preferred embodiment of the utility model, and every equivalent variations and modification of doing according to the scope of the utility model claims all should belong to the covering scope of the utility model.

Claims

1. multifrequency antenna, this multifrequency antenna comprises:

One ground plane, this ground plane has a grounding parts;

One FD feed source, this FD feed source is adjacent to this grounding parts;

One first radiant body, this first radiant body is connected in this FD feed source, is used for transmitting-receiving frequency to be positioned at the signal of a high-frequency band; And

One second radiant body, this second radiant body is connected in this FD feed source, is used for transmitting-receiving frequency to be positioned at the signal of a low frequency frequency range;

It is characterized in that this multifrequency antenna also comprises one the 3rd radiant body, the 3rd radiant body is connected in this FD feed source and between this second radiant body and this ground plane; And

One loop shape linking arm; This loop shape linking arm has an opening and is connected in this grounding parts, this first radiant body and this second radiant body; And between this first radiant body and this ground plane; This opening is towards this FD feed source, but this loop shape linking arm is used for making the 3rd radiant body transmitting-receiving frequency to be positioned at the signal of an intermediate frequency frequency range.

2. multifrequency antenna as claimed in claim 1 is characterized in that, this loop shape linking arm comprises:

One first arm, this first arm is connected in this grounding parts;

One second arm, this second arm is connected in this first arm; And

One the 3rd arm, the 3rd arm are connected in this second arm and this first radiant body and this second radiant body.

3. multifrequency antenna as claimed in claim 2 is characterized in that, this first arm is parallel to the 3rd arm in fact.

4. multifrequency antenna as claimed in claim 3 is characterized in that, this first arm and the 3rd arm are in fact perpendicular to this second arm.

5. multifrequency antenna as claimed in claim 1 is characterized in that, a spacing in this grounding parts and this FD feed source is less than or equal to 10mm.

6. multifrequency antenna as claimed in claim 1 is characterized in that the 3rd radiant body is parallel to this ground plane in fact.

7. multifrequency antenna as claimed in claim 1 is characterized in that, this high-frequency band is 5.15GHz to 5.85GHz, and this low frequency frequency range is 2.3GHz to 2.7GHz, and this intermediate frequency frequency range is 3.3GHz to 3.8GHz.