TWM492542U - Dual feed point type broadband antenna - Google Patents

Description

Double feed point broadband antenna 【0001】

This creation is about an antenna, especially a dual feed point broadband antenna.

【0002】

With the rapid development of wireless communication technology, portable wireless communication devices (such as smart phones) have been widely used by the public, and the antenna plays an important role in transmitting and receiving wireless signals, so the operational characteristics of the antenna are directly affected. The wireless signal transmission and reception capability and quality of the wireless communication device affect the functions of the wireless communication device for talking and transmitting data.

[0003]

The rapid development of wireless communication technology has evolved from the original 2G to 3G (such as WCDMA), and has joined the frequency bands such as wireless broadband network (WiFi) and Bluetooth as a large number of applications, and the frequency band has been a portable wireless communication device. The necessary band function. In order to enable users of wireless communication devices to receive wireless signals more conveniently and clearly, and to comply with the distinction that multiple frequency bands around the world can be used, current wireless communication devices often make wireless by increasing the number or volume of antenna devices. The communication device can transmit and receive wireless signals in a large bandwidth (Bandwidth) or multi-band, which inevitably increases the volume of the wireless communication device and the cost of the antenna, so the component integration is gradually increased and the wireless communication device functions. With the trend of increasing and becoming smaller and smaller, the way of using it has not been able to meet the demand. Therefore, how to compress the antenna volume and increase the multi-frequency radiation function is an issue that needs to be deeply explored in the industry.

[0004]

Furthermore, in the conventional technology, Planar Inverted-F Antenna (PIFA) is widely used in the built-in antenna design of wireless communication devices. However, although the planar inverted-F antenna can be used in multi-band design, the planar inverted-F antenna designed in the same volume has better performance than the monopole antenna, but its broadband efficiency and high gain. There are still many restrictions. For example, a general planar inverted-F antenna is often designed to resonate to a single-frequency or multi-band resonance wireless signal transceiving operation, but in the use of broadband and the adjustment of the available frequency band and bandwidth resonance design on the same antenna unit, still There are many limitations.

[0005]

The purpose of the present invention is to provide a dual feed point wideband antenna, which is provided with a wide extension by a first extension portion and a second extension portion of the radiation portion, and a shared dual feed point (signal feed portion and ground feed portion). The benefits make it suitable for both wireless broadband (WiFi) and Bluetooth (bluetooth) bands, and have the advantages of small size, low cost and high gain.

[0006]

In order to achieve the above purpose, one of the present inventions provides a dual feed point broadband antenna suitable for wireless communication devices. The dual feed point broadband antenna includes a radiation portion, a signal feed portion and a ground feed portion. . The radiation portion includes a common portion, a first extension portion, and a second extension portion. The common portion has a first side, a second side, and a third side, wherein the first side is adjacent to the second side, and the first side is opposite to the third side. The first extension portion is coupled to the common portion and extends outwardly from the first side, wherein the first extension portion includes the first connecting portion, the bent portion and the irregular portion. The second extension is coupled to the common portion and extends outwardly from the second side, wherein the second extension includes a first straight segment, a second connecting segment, and a second straight segment. The signal feeding portion is connected to the third side of the common portion. The ground feed portion is connected to the third side of the common portion. The radiation unit, the signal feeding unit and the grounding feeding unit are configured to transmit and receive wireless signals that are resonant in a specific frequency band.

[0018]

1‧‧‧Double-feed point broadband antenna
2‧‧‧ Radiation Department
21‧‧‧Common Department
21a‧‧‧ first side
21b‧‧‧ second side
21c‧‧‧ third side
22‧‧‧First Extension
221‧‧‧First connection segment
222‧‧‧Bend section
223‧‧‧ irregular paragraph
223a‧‧‧Article
223b‧‧‧Poly end
23‧‧‧Second extension
231‧‧‧First straight line segment
232‧‧‧Second connection
233‧‧‧Second straight line segment
24‧‧‧First coupling
25‧‧‧Second coupling
3‧‧‧ Signal Feeding Department
4‧‧‧ Grounding Feeding Department
5‧‧‧ Carrier
5a‧‧‧ first surface
5b‧‧‧ second surface

【0007】

FIG. 1 is a schematic diagram showing the structure of a dual feed point broadband antenna structure according to a preferred embodiment of the present invention.
Fig. 2A is a front view showing the double feed point type wideband antenna shown in Fig. 1 disposed on the carrier.
Fig. 2B is a schematic view showing the back side of the double feed point wideband antenna shown in Fig. 1 on the back side of the carrier.
Figure 3 is a structural exploded view of the dual feed point wideband antenna and its carrier shown in Figs. 2A and 2B.
Fig. 4 is a graph showing the standing wave ratio versus frequency of the double feed point wideband antenna shown in Fig. 1.

[0008]

Some exemplary embodiments embodying the features and advantages of the present invention are described in detail in the following description. It should be understood that the present invention can be varied in various aspects without departing from the scope of the present invention, and that the description and drawings are used for illustrative purposes, rather than limiting This creation

【0009】

FIG. 1 is a schematic diagram showing the structure of a dual feed point broadband antenna structure according to a preferred embodiment of the present invention. As shown in FIG. 1 , the dual feed point broadband antenna 1 of the present invention is suitable for a wireless communication device, such as but not limited to a smart phone, and the dual feed point broadband antenna 1 includes a radiating portion 2 and a signal feeding portion. 3 and the ground feed portion 4. The radiation portion 2 includes a common portion 21, a first extension portion 22, and a second extension portion 23. The common portion 21 has a first side 21a, a second side 21b, and a third side 21c, wherein the first side 21a is adjacent to the second side 21b, and the first side 21a is opposite to the third side 21c. The first extending portion 22 is connected to the common portion 21 and extends outward from the first side 21 a , wherein the first extending portion 22 includes a first connecting portion 221 , a bent portion 222 , and an irregular portion 223 . The second extension portion 23 is also connected to the common portion 21 and extends outward from the second side 21b. The second extension portion 23 includes a first straight line segment 231, a second connecting portion 232 and a second straight line segment 233. The signal feeding portion 3 is connected to the third side 21c of the common portion 21, and the ground feeding portion 4 is also connected to the third side 21c of the common portion 21. In the present embodiment, the radiating portion 2, the signal feeding portion 3, and the grounding feeding portion 4 are configured to transmit and receive wireless signals that resonate in a specific frequency band.

[0010]

In this embodiment, the radiating portion 2 is made of a metal material, and includes a common portion 21, a first extending portion 22, and a second extending portion 23, and is preferably made of a single metal piece, but is not limit. The first extension 22 is connected to the first side 21a of the common portion 21 and extends outward from the first side 21a of the common portion 21. The first extending portion 22 includes a first connecting portion 221, a bent portion 222 and an irregular portion 223 which are sequentially connected, wherein one end of the first connecting portion 221 is connected to the first side 21a of the common connecting portion 21, and the first connecting portion The other end of the 211 is connected to the bent section 222. The bending section 222 is connected between the first connecting section 211 and the irregular section 223, and the irregular section 223 is connected to the bending section 222. In this embodiment, the first connecting portion 221 is perpendicularly connected to the first side 21a of the common portion 21, but is not limited thereto. The bending section 222 is substantially U-shaped and is connected between the first connecting section 221 and the irregular section 223, wherein the opening of the U-shaped bending section 222 faces the second side 21b opposite to the common joint 21. The direction. The irregular section 223 includes two portions of a strip portion 223a and a polygonal end portion 223b, wherein the strip portion 223a is coupled between the bent portion 222 and the polygonal end portion 223b, and the strip portion 223a is from the bent portion 222 to the polygonal end portion. The direction of 223b is a tapered structure. In some embodiments, the width of the strip portion 223a is relatively smaller than the width of the bent portion 222. The polygonal end portion 223b is connected to the strip portion 223a, and the polygonal end portion 223b is the end portion of the first extension portion 22. In the embodiment, the path length of the first extending portion 22 is one quarter of the resonant wavelength of the operating frequency, and the first connecting portion 221, the bent portion 222 and the irregular portion 223 are preferably integrally formed. But not limited to this.

[0011]

Referring to FIG. 1 , the second extension portion 23 is connected to the second side 21 b of the common portion 21 and extends outward from the second side 21 b of the common portion 21 . The second extending portion 23 includes a first straight line segment 231, a second connecting portion 232 and a second straight line segment 233 which are sequentially connected. One end of the first straight line segment 231 is connected to the second side 21b of the common joint portion 21, and the first straight line segment 231 is substantially parallel to the common joint portion 21. The second connecting section 232 is perpendicularly connected to the first straight section 231 and the second straight section 233, respectively, such that the first straight section 231 and the second straight section 233 are parallel and spaced apart from each other. The second straight line segment 233 extends toward the common joint portion 21, and the width of the second straight line portion 233 is relatively larger than the width of the first straight line portion 231. In this embodiment, the path length of the second extension portion 23 is one quarter of the resonance wavelength of the operating frequency, and the first straight line 231, the second connecting portion 232, and the second straight line segment 233 are preferably integrally formed. But not limited to this.

[0012]

In the embodiment, as shown in FIG. 1 , the radiation portion 2 further includes a first coupling portion 24 and a second coupling portion 25 , and the first coupling portion 24 is connected to the third side 21 c of the common portion 21 . The second coupling portion 25 connects the third side 21c of the common portion 21 and the ground feeding portion 4 to the signal feeding portion 3. The first coupling portion 24 extends relative to the first extension portion 22 and is opposite to the first connection portion 221 of the first extension portion 22 by the third side 21c of the common portion 21 . The second coupling portion 25 is adjacent to the second extension portion 23 and extends from the third side 21 c of the common portion 21 in a direction opposite to the first connection portion 221 of the first extension portion 22 . In this embodiment, the first coupling portion 24 and the second coupling portion 25 are disposed parallel to each other and spaced apart from each other. The signal feeding unit 3 can feed the RF signal to be transmitted by the RF circuit (not shown) to the dual feed point broadband antenna 1 , and of course, the signal feeding point 3 can receive the dual feed point broadband antenna 1 The incoming RF signal is output to the RF circuit. The ground feed portion 4 can be connected to a ground point (not shown). When the dual feed point type broadband antenna 1 is operated, after the radio frequency signal enters from the signal feeding portion 3, the current path of the two operating frequencies is formed by the conductive path of the double feed point type broadband antenna 1. One of the current paths flows from the signal feed portion 3 to the first extension portion 22, and the other current path flows from the signal feed portion 3 to the second extension portion 23. Since the two current paths share the common portion 21, the antenna can be saved. The area occupied.

[0013]

2A and 2B are respectively a schematic diagram of the double-feed point type broadband antenna shown in FIG. 1 disposed on the front and back sides of the carrier, and FIG. 3 is a double feed point type broadband as shown in FIGS. 2A and 2B. Explosion diagram of the structure of the antenna and its carrier. As shown in FIGS. 2A, 2B and 3, the double feed point type wideband antenna 1 is disposed on a carrier 5 and is disposed on a body (not shown) of the wireless communication device via the carrier 5 . The carrier 5 includes a first surface 5a and a second surface 5b, wherein the second surface 5b is opposite to the first surface 5a. In this embodiment, the common-fitting portion 21, the first extending portion 22, the second extending portion 23, the portion of the first coupling portion 24, and the portion of the second coupling portion 25 of the dual feed point type broadband antenna 1 are The first surface 5a of the carrier 5, in other words, the common portion 21 of the dual feed point broadband antenna 1, the first extension portion 22, the second extension portion 23, the portion of the first coupling portion 24, and the portion of the portion The two coupling portions 25 are coplanar. The signal feeding portion 3 of the double feed point broadband antenna 1 , the ground feeding portion 4 , the first coupling portion 24 of the other portion, and the second coupling portion 25 of the other portion are disposed on the second surface 5 b of the carrier 5 . The carrier 5 can be, but not limited to, a Flexible Printed Circuit Board (FPCB) or a double-sided tape. Since the carrier 5 is flexible, the dual feed point broadband antenna 1 can be carried by the carrier 5. Provided in the body of the wireless communication device (that is, inside the casing of the wireless communication device), and electrically connected to the wireless signal processing circuit of the wireless communication device, so that the wireless communication device can be fed by the double feed point The wideband antenna 1 performs transmission and reception of wireless signals. In some embodiments, the wireless communication device can be a smart phone, a personal digital assistant (PDA), a tablet computer or a portable computer, and the smart phone is preferred.

[0014]

Fig. 4 is a diagram showing the standing wave ratio versus frequency variation of the double feed point broadband antenna shown in Fig. 1. As shown in the figure, the vertical axis is the standing wave ratio of the double feed point broadband antenna (Standing Wave Ratio, SWR), which is a positive relationship with the gain value of Return Loss, and can calculate the standing wave ratio value into a foldback loss gain value by calculation. The standing wave ratio varies with frequency. Usually, a frequency band such as 2.5 or less represents a good effect of the antenna in the frequency band. Therefore, as shown in Fig. 4, the dual feed point wideband antenna 1 of the present invention works. When the specific frequency band is 2400MHZ to 2480MHZ, it has good signal transmission and reception effect. In other words, the dual feed point broadband antenna 1 of the present invention is suitable for wireless signal transmission and reception operations of wireless broadband network (Wifi) and Bluetooth common mode broadband.

[0015]

In this embodiment, the radiating portion 2, the signal feeding portion 3, and the grounding feeding portion 4 of the dual feed point type broadband antenna 1 are configured to resonate and perform a wireless signal transceiving operation in a specific frequency band required, wherein the required specific frequency band is used. The resonant frequency is between 2400 MHz and 2480 MHz. In detail, the first extension 22 of the radiating portion 2 is structured to generate a resonant frequency of 2440 MHz, that is, a wireless broadband frequency, and the second extending portion 23 of the radiating portion 2 resonates with the first extending portion 22, thereby increasing the The bandwidth of a specific frequency band increases the bandwidth of the specific frequency band to between 2400 MHz and 2480 MHz, whereby the dual feed point broadband antenna 1 can be applied to wireless signal transmission and reception of Bluetooth and wireless broadband network common mode broadband. . Furthermore, the antenna of the dual feed point broadband antenna 1 of the present invention has a similar appearance to the π shape, and only passes through the first extension portion 22, the second extension portion 23 and the double feed point of the radiation portion 2 (the signal feed portion 3) And the design of the grounding feeding portion 4) can achieve the amplification of the bandwidth, the structure is quite simple, and the performance is better than the conventional single planar inverted-F antenna. Therefore, the dual feed point broadband antenna 1 of the present invention can increase the broadband efficiency without additionally increasing the number or volume of the antenna, and has the advantages of low cost and high gain, and is advantageous for miniaturization of the wireless communication device. trend.

[0016]

In summary, the dual feed-in point broadband antenna of the present invention is achieved by the first extension portion and the second extension portion of the radiation portion, and the shared double feed point (signal feed portion and ground feed portion). The benefits of broadband enable it to be used for wireless signal transmission and reception of wireless broadband networks and Bluetooth common mode wideband. On the other hand, the dual feed-in-point wideband antenna of the present invention has a simple structure and can increase the broadband efficiency without additionally increasing the number or volume of the antenna, so that it has the advantages of small size, low cost and high gain. .

[0017]

This creation has been modified by those who are familiar with the technology, but it is not intended to be protected by the scope of the patent application.

1‧‧‧Double-feed point broadband antenna

2‧‧‧ Radiation Department

21‧‧‧Common Department

21a‧‧‧ first side

21b‧‧‧ second side

21c‧‧‧ third side

22‧‧‧First Extension

221‧‧‧First connection segment

222‧‧‧Bend section

223‧‧‧ irregular paragraph

223a‧‧‧Article

223b‧‧‧Poly end

23‧‧‧Second extension

231‧‧‧First straight line segment

232‧‧‧Second connection

233‧‧‧Second straight line segment

24‧‧‧First coupling

25‧‧‧Second coupling

3‧‧‧ Signal Feeding Department

4‧‧‧ Grounding Feeding Department

Claims (10)

[Item 1] A dual feed point broadband antenna suitable for a wireless communication device, the dual feed point broadband antenna includes:
A radiation department, including:
a common portion having a first side, a second side, and a third side, wherein the first side is adjacent to the second side, and the first side is opposite to the third side;
a first extension portion is connected to the common portion and extends outwardly from the first side, wherein the first extension portion includes a first connecting portion, a bent portion and an irregular portion; and a second extension a second portion extending from the second side, wherein the second extending portion includes a first straight line segment, a second connecting portion and a second straight line portion;
a signal feeding portion connected to the third side of the common portion; and a ground feeding portion connected to the third side of the common portion;
The radiation portion, the signal feeding portion and the ground feeding portion are configured to transmit and receive wireless signals that resonate in a specific frequency band. [Item 2] The dual feed point broadband antenna according to claim 1, wherein the radiation portion further comprises:
a first coupling portion is connected to the third side of the signal feeding portion and the common portion; and a second coupling portion is connected to the ground feeding portion and the third side of the common portion;
The first coupling portion and the second coupling portion are parallel to each other and spaced apart from each other. [Item 3] The double feed point broadband antenna according to claim 1, wherein one end of the first connecting segment is connected to the first side of the common connecting portion, and the other end of the first connecting segment is bent a segment connection, the bending segment is connected between the first connecting segment and the irregular segment, and the irregular segment is connected to the bending segment. [Item 4] The dual feed point broadband antenna according to claim 3, wherein the irregular segment comprises a strip portion and a polygonal end portion, the strip portion being connected between the bent portion and the end of the polygon And the polygonal end is connected to the strip. [Item 5] The dual feed point broadband antenna according to claim 1, wherein the first straight segment of the second extension is connected to the second side of the common portion, and the second connection segment is connected to the second Between a straight line segment and the second straight line segment, the second straight line segment is connected to the second connecting segment, and the first straight line segment and the second straight line segment are parallel and spaced apart from each other. [Item 6] The dual feed point broadband antenna according to claim 1, wherein the resonance frequency of the specific frequency band is between 2400 MHz and 2480 MHz. [Item 7] The dual feed point broadband antenna according to claim 6, wherein the first extension is configured to generate and receive wireless signals in a wireless broadband network band, and the second extension is coupled to the first extension The resonance is based on a wireless signal transmission and reception that generates a Bluetooth band. [Item 8] The dual feed point broadband antenna according to claim 1, wherein the path lengths of the first extension portion and the second extension portion are respectively a quarter of a resonance wavelength of the operating frequency. [Item 9] The dual feed point wideband antenna of claim 1, wherein the radiating portion is made of a single piece of metal. [Item 10] The dual feed point broadband antenna according to claim 1, wherein the dual feed point broadband antenna is disposed on a carrier, and the wireless communication device is a smart phone.