TWM492543U - 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 global satellite positioning system (GPS) frequency band as a large number of applications, and this frequency band has become a necessary frequency band function of the portable wireless communication device. 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 increasing and the wireless communication device function is increased. With the trend of increasing size and miniaturization, 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-in point broadband antenna, which is configured by a first arm and a second arm of the radiating portion, and a shared dual feed point (signal feed portion and ground feed portion) to achieve wide frequency The benefits, and the resonance frequency of the specific frequency band that it resonates, cover the working frequency band of the Global Positioning System (GPS), 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 arm, and a second arm. The common portion has a first side, a second side, and a third side, wherein the first side is opposite to the second side, and the first side is adjacent to the third side. The first arm is coupled to the common portion and extends outwardly from the first side, wherein the first arm includes an irregular segment, a connecting segment and a first straight segment. The second arm is coupled to the common portion and extends outwardly from the second side, wherein the second arm includes a second straight line segment and a third straight line segment. The signal feeding portion is connected to the third side of the common portion and disposed adjacent to the first side. The ground feed portion is connected to the third side of the common portion and disposed adjacent to the second side. The radiation part, the signal feeding part and the grounding feeding part are configured to transmit and receive wireless signals in a specific frequency band.

[0019]

1‧‧‧Double-feed point broadband antenna
2‧‧‧ Radiation Department
21‧‧‧Common Department
21a‧‧‧ first side
21b‧‧‧ second side
21c‧‧‧ third side
22‧‧‧First arm
221‧‧‧ irregular paragraph
221a‧‧‧first notch
221b‧‧‧second notch
222‧‧‧ Connection section
223‧‧‧First straight line segment
23‧‧‧second arm
231‧‧‧Second straight line segment
232‧‧‧ third connection
231a‧‧‧ third notch
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, wherein the wireless communication device can be combined with a Global Positioning System (GPS). ) Signal coupling. The dual feed point type broadband antenna 1 includes a radiating portion 2, a signal feeding portion 3, and a ground feeding portion 4. The radiation portion 2 includes a common portion 21, a first arm 22, and a second arm 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 opposite to the second side 21b, and the first side 21a is adjacent to the third side 21c. The first arm 22 is connected to the common portion 21 and extends outward from the first side 21a. The first arm 22 includes an irregular section 221, a connecting section 222 and a first straight section 223. The second arm 23 is connected to the common portion 21 and extends outward from the second side 21b. The second arm 22 includes a second straight line segment 231 and a third straight line segment 232. In the present embodiment, the first arm 22 extends obliquely outward from the first side 21a of the common portion 21, and the second arm 23 extends perpendicularly outward from the second side 21b of the common portion 21. The signal feeding portion 3 is connected to the third side 21c of the common portion 21 and disposed adjacent to the first side 21a. The ground feed portion 4 is connected to the third side 21c of the common portion 21 and disposed adjacent to the second side 21b. In this 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 are resonating to a specific frequency band.

[0010]

In the present embodiment, the radiation portion 2 is made of a metal material, which may be, but not limited to, a copper foil. The radiating portion 2 includes a common portion 21, a first arm 22, and a second arm 23, and is preferably made of a single metal sheet, but is not limited thereto.

[0011]

The first arm 22 is coupled to the first side 21a of the common portion 21 and extends outwardly from the first side 21a. The first arm 22 includes an irregular section 221, a connecting section 222 and a first straight section 223 which are sequentially connected. One end of the irregular section 221 is connected to the first side 21a of the common part 21, and the other end of the irregular section 221 is connected to the connecting section 222. The connecting section 222 is connected between the irregular section 221 and the first straight section 223, and the first straight section 223 is connected to the connecting section 222. In this embodiment, the connecting section 222 is substantially perpendicularly connected to the irregular section 221 and the first straight section 223, and the first straight section 223 extends toward the first side 21a of the common joint 21 and is opposite to the irregular section 221. Interval setting. In this embodiment, the irregular section 221 further has a second recess 221a and a second recess 221b, and the second recess 221a and the second recess 221b are respectively disposed on opposite sides of the first arm 22, and The second recess 221a is disposed on a side closer to the first arm side 33 of the first straight section 223. The connecting section 222 and the first straight section 223 are all elongated rectangular structures, and the length of the first straight section 223 is smaller than the length of the irregular section 221 . In some embodiments, the irregular section 221, the connecting section 222 and the first straight section 223 of the first arm 22 constitute a bent extension structure. The length of the path of the first arm 22 is one quarter of the resonant wavelength of the operating frequency, and the irregular section 221, the connecting section 222 and the first straight section 223 are preferably integrally formed, but not limited thereto.

[0012]

The second arm 23 is connected to the second side 21b of the common portion 21, and extends outward from the second side 21b of the common portion 21 in a direction opposite to the first side 21c. The second arm 23 includes a second straight line segment 231 and a third straight line segment 232 that are sequentially connected. One end of the second straight line segment 231 is connected to the second side 21b of the common portion 21, the other end of the second straight line segment 231 is connected to the third straight line segment 232, and the third straight line segment 232 is connected to the second straight line segment 231. The second straight line segment 231 and the third straight line segment 232 are substantially rectangular in shape, the length and width of the second straight line segment 231 are greater than the length and width of the third straight line segment 232, and the second straight line segment 231 is substantially parallel to the first Three straight line segments 232. In this embodiment, the second straight line segment 231 further includes a third recess 231a disposed adjacent to the second side 21b of the common portion 21. In some embodiments, the path length of the second arm 23 is one quarter of the resonant wavelength of the operating frequency thereof, and the second straight line segment 231 and the third straight line segment 232 are preferably integrally formed, but not Limited.

[0013]

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 is adjacent to the first side 21a of the common portion 21 and extends outward from the third side 21c of the common portion 21, and the second coupling portion 25 is adjacent to the second side of the common portion 21 21b and extending outward from the third side 21c of the common joint portion 21. 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 unit 3 can receive the dual feed point broadband antenna 1 . The RF signal is output to the RF circuit. The ground feed portion 4 can be connected to a ground point (not shown).

[0014]

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 of the dual feed-in point broadband antenna 1, the first arm 22, the second arm 23, the portion of the first coupling portion 24, and the portion of the second coupling portion 25 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 arm 22, the second arm 23, the first coupling portion 24 and the portion of the portion The two coupling portions 25 are coplanar. The signal feed portion 3 of the double feed point broadband antenna 1 , the ground feed portion 4 , the other portion of the first coupling portion 24 and the other portion of the second coupling portion 25 are bent to 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. It is disposed in the body of the wireless communication device (that is, inside the casing of the wireless communication device), and is electrically connected to the wireless signal processing circuit of the wireless communication device via the signal feeding portion 3 and the ground feeding portion 4, so that the wireless The communication device can perform the wireless signal transmission and reception operation by the dual feed point broadband antenna 1. 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.

[0015]

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. Good signal transmission and reception at 1575MHZ. In other words, the specific frequency band to which the dual feed point broadband antenna 1 of the present invention is applied covers a specific frequency of 1575 MHz, so it can be applied to the working frequency band of the Global Positioning System (GPS).

[0016]

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 covers the operating band of the Global Positioning System (GPS) (ie 1575 MHz). Furthermore, the antenna of the dual feed-in-point broadband antenna 1 of the present invention has a similar appearance to the π shape, and feeds the RF signal to the radiation portion 2 with the double feed point (the signal feed portion 3 and the ground feed portion 4). An arm 22 and a second arm 23, which are required to resonate with a global satellite positioning system (GPS), have a relatively simple structure and a signal receiving performance is better than that of a 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.

[0017]

In summary, the dual feed-in point broadband antenna of the present invention is achieved by the first arm and the second arm of the radiating portion, together with the shared double feed point (signal feed portion and ground feed portion). Broadband benefits, and the applicable frequency bands cover the working frequency bands of the Global Positioning System (GPS). 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. .

[0018]

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 arm

221‧‧‧ irregular paragraph

221a‧‧‧first notch

221b‧‧‧second notch

222‧‧‧ Connection section

223‧‧‧First straight line segment

23‧‧‧second arm

231‧‧‧Second straight line segment

232‧‧‧ third connection

231a‧‧‧ third notch

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 and the second side are opposite, the first side is adjacent to the third side;
a first arm coupled to the common portion and extending outwardly from the first side, wherein the first arm includes an irregular segment, a connecting segment and a first straight segment; and a second arm Connecting to the common portion and extending outward from the second side, wherein the second arm includes a second straight line segment and a third straight line portion;
a signal feeding portion connected to the third side of the common portion and disposed adjacent to the first side; and a grounding feeding portion connected to the third side of the common portion and disposed adjacent to the second side ;
The radiation portion, the signal feeding portion and the ground feeding portion are configured to transmit and receive wireless signals that are resonant 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 dual feed point broadband antenna according to claim 1, wherein one end of the irregular segment is connected to the first side of the common portion, and the other end of the irregular segment is connected to the connecting segment. The connecting segment is connected between the irregular segment and the first straight segment, and the first straight segment is connected to the connecting segment. [Item 4] The dual feed point broadband antenna according to claim 3, wherein the connecting segment is vertically connected to the irregular segment and the first straight segment, and the first straight segment is toward the common portion The direction of one side extends, and the first straight line segment is spaced from the irregular segment. [Item 5] The double feed point broadband antenna according to claim 1, wherein one end of the second straight segment is connected to the second side of the common portion, and the other end of the second straight segment is connected to the first a three straight line segment, the third straight line segment being connected to the second straight line segment. [Item 6] The dual feed point broadband antenna of claim 1, wherein the second arm extends vertically outward from the second side of the common portion. [Item 7] The dual feed point broadband antenna as described in claim 1, wherein the specific frequency band covers the operating frequency of the global satellite positioning system. [Item 8] The dual feed point broadband antenna according to claim 1, wherein the path length of the first arm and the second arm is a quarter of a resonant 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.