CN201171084Y - Double-frequency inverted F-shaped antenna - Google Patents

Abstract

The utility model discloses a dual-frenquency inverted F type antenna, first frequency channel signal and second frequency channel signal are fed in by signal feed-in portion, on the one hand via the first radiation portion and the wireless transmission of second radiation portion of radiation component, on the other hand transmits to ground connection subassembly via the short circuit pin, in order to reach the dual-frenquency effect, utilize the design of preparation bending structure on the short circuit pin simultaneously, reduce when dual-frenquency inverted F type antenna utilizes short circuit pin transmission signal, receive and send the interference that signal caused to radiation component.

Description

Dual Frequency Inverted-F Antenna

technical field

The utility model relates to an inverted-F antenna, in particular to a dual-frequency inverted-F antenna.

Background technique

Due to the wireless communication technology that uses electromagnetic waves to transmit signals, it can achieve the effect of communicating with remote devices without the need for wiring materials. Therefore, it has the advantage of being easy to move, so that the types of products using wireless communication technology are increasing day by day, such as mobile phones, notebook computers, and the like. Since these products use electromagnetic waves to transmit signals, antennas for sending and receiving electromagnetic wave signals have become necessary devices. At present, antennas are mainly divided into antennas exposed outside the device and antennas built into the device. The antennas exposed outside the device not only affect the size and appearance of the product, but are also prone to bending and breaking due to external impact. shortcoming. Therefore, the built-in antenna has become a trend.

Please refer to FIG. 1 , which is a schematic diagram of a known inverted-F antenna. The inverted-F antenna 10 has a strip-shaped radiating element 1 , a plate-shaped grounding element 2 spaced opposite to the radiating antenna, a short-circuit pin 3 and a signal feeding portion 4 between them. The short pin 3 connects one end of the radiation element 1 to the ground element 2 . The signal feed-in part 4 is arranged at the middle position between the two ends of the radiation component 1, and receives the signal fed in from the signal line. When the signal feeding part 4 receives the fed signal current, the signal current flows in left and right directions. When the signal current flows directly from the signal feed-in part 4 to the short-circuit pin 3, because the signal currents of the signal feed-in part 4 and the short-circuit pin 3 flow in opposite directions, the signal currents in the left path will cancel each other out and will not resonate to send out a signal . As for the length L of the right path, it can be equivalent to the length of the part on the right side of the signal feeding part 4 in the radiation component 1 , which is approximately equal to a quarter wavelength. Therefore, a signal of a specific frequency can be sent out, and a signal of this frequency can also be sensed, and the sensed signal current can be derived through the signal feeding part 4 .

The known inverted-F antenna 10 can only be used to send and receive a single signal, and cannot be effectively applied to current multi-task requirements.

Contents of the invention

The purpose of this utility model is to provide a dual-frequency inverted-F antenna, which solves the problem that the known inverted-F antenna can only send and receive a single signal, and makes a curved structure design on the short-circuit pin to reduce the structure of the signal passing through the short-circuit pin The effect on the radiating element when passing.

In order to achieve the above purpose, the utility model provides a dual-frequency inverted-F antenna, which includes a radiating component, a grounding component, a short-circuit pin and a signal feeding part. The radiation component has a first radiation part and a second radiation part. The first radiating part is used for wirelessly sending and receiving signals of the first frequency band, and the second radiating part is used for wirelessly sending and receiving signals of the second frequency band. The grounding component is spaced opposite to the radiating component. The short-circuit pin is located between the radiation component and the ground component, and the two ends are vertically connected to the radiation component and the ground component respectively. One end of the signal feed-in part is vertically connected to the radiation component, and the other end extends toward the ground component.

The dual-frequency inverted-F antenna disclosed by the utility model is a radiating part extended from the known inverted-F antenna to send and receive two signals, so as to solve the problem that the known inverted-F antenna can only send and receive a single signal .

According to another dual-frequency inverted-F antenna disclosed in the present invention, it includes a radiating component, a grounding component, a bent short-circuit pin and a signal feeding part. The radiation component has a first radiation part and a second radiation part. The first radiating part is used for wirelessly sending and receiving signals of the first frequency band, and the second radiating part is used for wirelessly sending and receiving signals of the second frequency band. The grounding component is spaced opposite to the radiating component. The short-circuit pin is located between the radiation component and the ground component, and the two ends of the bent short-circuit pin are vertically connected to the radiation component and the ground component respectively, and the middle of the bent short-circuit pin presents a curved structure. One end of the signal feeding part and the bent short-circuit pin are vertically connected to the radiation component, and the other end extends toward the ground component.

With the help of another dual-frequency inverted-F antenna disclosed in the utility model, in addition to adding a radiation part to the known inverted-F antenna to achieve the dual-frequency effect, the design of the curved structure also enables the curved structure to The signal flows in the opposite direction, which can reduce the interference to the transmitting and receiving signals at the radiation end. At high frequencies, the signals on the curved structure flow in the same direction, which can increase the effect of radiation.

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the utility model.

Description of drawings

FIG. 1 is a schematic diagram of a known inverted-F antenna;

Fig. 2 is the schematic diagram of the first embodiment of the utility model;

Fig. 3 is the second embodiment schematic diagram of the utility model;

Fig. 4 is the schematic diagram of the third embodiment of the utility model;

Fig. 5 is the schematic diagram of the fourth embodiment of the utility model;

Fig. 6 is a simulation diagram of the return loss value of the second embodiment of the present invention;

Fig. 7 is a current simulation diagram at low frequency of the second embodiment of the present invention;

Fig. 8 is a current simulation diagram at high frequency of the second embodiment of the present invention;

Fig. 9 is a standing wave ratio measurement diagram of the third embodiment of the present invention;

Fig. 10 is the average gain and efficiency table measured at low frequency of the third embodiment of the present invention;

Fig. 11 is the table of average gain and efficiency measured at high frequency in the third embodiment of the present invention;

Fig. 12 is a standing wave ratio measurement diagram of the fourth embodiment of the present invention;

Fig. 13 is the table of average gain and efficiency measured at low frequency of the fourth embodiment of the present invention; and

Fig. 14 is a table of the average gain and efficiency measured at high frequency of the fourth embodiment of the present invention.

Among them, reference signs:

1 radiating component

2 ground components

3 short circuit pins

4 Signal feed-in part

10 Inverted F Antenna

21 radiating components

22 ground assembly

23 short circuit pin

24 Signal feed-in part

25 First Radiant Division

26 Second Radiant Division

31 radiating components

32 ground assembly

33 short circuit pins

33a curved structure

33b first arm

33c second arm

34 Signal feed-in part

35 First Radiant Department

36 The second radiation department

45 First Radiant Department

45a flat metal

45b rectangular metal flat plate

46 The second radiation department

46a flat metal

46b rectangular metal flat plate

55 First Radiant Department

55a flat metal

55b meandering metal plate

55c rectangular metal flat plate

56 The second radiation department

56a flat metal

56b meandering metal plate

56c rectangular metal flat plate

100 dual frequency inverted F antenna

200 dual frequency inverted F antenna

Implementation

Please refer to FIG. 2 , which is a schematic diagram of the first embodiment of the present invention. The dual-frequency inverted-F antenna 100 of this embodiment has a radiation element 21 , a ground element 22 , a short-circuit pin 23 and a signal feed-in portion 24 .

The radiating component 21 has a first radiating part 25 and a second radiating part 26 , the first radiating part 25 is used to send and receive signals in the first frequency band, and the second radiating part 26 is used to send and receive signals in the second frequency band. The radiation component 21 is spaced opposite to the ground component 22 . The length of the first radiating part 25 is approximately equal to a quarter wavelength of the first frequency band signal, and of course may be between one third wavelength and one fifth wavelength of the first frequency band signal. The length of the second radiating part 26 is approximately equal to a quarter wavelength of the second frequency band signal, and can also be between one third wavelength and one fifth wavelength of the first frequency band signal. The shape of the radiation element 21 is a flat metal. The frequency band of the first frequency band signal is 824MHz-960MHz, and of course other frequency bands may also be used. The frequency band of the second frequency band signal is 1710MHz-2170MHz, and of course other frequency bands may also be used.

The ground component 22 is spaced opposite to the radiation component 21 . The ground element 22 is composed of a flat metal plate opposite to the radiation element 21 , and a rectangular metal plate vertically connected to one side of the flat metal and extending away from the radiation element 21 .

One end of the signal feeding part 24 is vertically connected to the radiation element 21 , and the other end extends toward the ground element 22 but does not contact the ground element 22 , and is used for feeding in or out the first frequency band signal and the second frequency band signal. The signal feed-in part 24 is fed into the signal by the signal wire, and the signal wire includes a signal core wire, an insulating layer covering the signal core wire, and a ground layer covering the insulating layer, wherein the signal core wire is connected to the signal feed-in part 24, and the ground layer is connected to ground assembly 22 .

The shorting pin 23 is located between the radiating element 21 and the grounding element 22. ground assembly 22 . One end of the short-circuit pin 23 is vertically connected to the radiation element 21 , and is located on the same side of the radiation element 21 as the signal feeding portion 24 . The other end of the short-circuit pin 23 extends vertically toward the ground component 22 for connecting to the ground component 22 .

In the dual-frequency inverted-F antenna 100 of this embodiment, the signal feeding part 24 feeds the first frequency band signal and the second frequency band signal, on the one hand, it is transmitted through the first radiation part 25 and the second radiation part 26, and on the other hand, it is connected via a short circuit. Foot 23 passes to ground assembly 22 . The dual-frequency inverted-F antenna 100 of the present embodiment extends a radiation portion from the radiation assembly 1 of the known inverted-F antenna 10 to send and receive two signals respectively, so as to solve the problem that the known inverted-F antenna 10 can only send and receive. The single signal problem.

Please refer to FIG. 3 , which is a schematic diagram of the second embodiment of the present invention. The dual-frequency inverted-F antenna 200 of this embodiment has a radiation element 31 , a ground element 32 , a bent short-circuit pin 33 and a signal feed-in portion 34 .

The radiation component 31 has a first radiation portion 35 and a second radiation portion 36 . The first radiating part 35 is used for wirelessly transmitting and receiving signals of the first frequency band, and the second radiating part 36 is used for wirelessly transmitting and receiving signals of the second frequency band. The radiation component 31 is spaced opposite to the ground component 32 . The length of the first radiating part 35 is approximately equal to a quarter wavelength of the signal in the first frequency band, and of course may be between one-third and one-fifth of the wavelength of the signal in the first frequency band. The length of the second radiating part 36 is approximately equal to a quarter wavelength of the second frequency band signal, and can also be between one third wavelength and one fifth wavelength of the first frequency band signal. The shape of the radiation component 31 is a flat metal. The frequency band of the first frequency band signal is 824MHz-960MHz, and of course other frequency bands may also be used. The frequency band of the second frequency band signal is 1710MHz-2170MHz, and of course other frequency bands may also be used.

The ground component 32 is spaced opposite to the radiation component 31 . The ground component 32 is composed of a flat metal plate opposite to the radiation component 31 , and a rectangular metal plate vertically connected to one side of the flat metal and extending away from the radiation component 31 .

The bent short-circuit pin 33 is located between the radiation element 31 and the ground element 32 . Two ends of the bent short-circuit pin 33 are respectively vertically connected to the radiation element 31 and the ground element 32 , and a bent structure 33 a is formed in the middle of the bent short-circuit pin 33 . The bent short-circuit pin 33 includes a first arm 33b, a second arm 33c and a bent structure 33a. One end of the first arm 33b is vertically connected to the radiation element 31 , the other end extends toward the ground element 32 and is connected to one end of the curved structure 33a. One end of the second arm 33c is vertically connected to the grounding component 32, the other end extends toward the radiation component 31, and is connected to the other end of the curved structure 33a. The shape of the curved structure 33a is ㄇ-shaped or horseshoe-shaped, and of course it can also be in other shapes. The curved structure 33 a is in the same direction as the first radiating portion 35 or in the same direction as the second radiating portion 36 .

One end of the signal feed-in portion 34 and the bent short-circuit pin 33 are vertically connected to the radiation component 31 . The other end of the signal feed-in portion 34 extends toward the ground component 32 , but does not contact the ground component 32 . The signal feeding part 34 is used to feed in or output the first frequency band signal and the second frequency band signal. The signal feed-in part 34 is fed into the signal by the signal wire, and the signal wire includes a signal core wire, an insulating layer covering the signal core wire, and a ground layer covering the insulating layer, wherein the signal core wire is connected to the signal feed-in part 34, and the ground layer is connected to ground assembly 32 .

In the dual-frequency inverted-F antenna 200 of this embodiment, when the signal feeding part 34 feeds the first frequency band signal and the second frequency band signal, and on the one hand send it through the first radiating part 35 and the second radiating part 36, on the other hand through the The bent shorting pin 33 is transmitted to the ground component 32 . When the dual-frequency inverted-F antenna 100 of the first embodiment radiates signals, the signal is fed into the signal by the signal feeding part 24 and transmitted to the ground component 22 through the short-circuit pin 23, and the current flowing through the short-circuit pin 23 will directly interfere with the radiating components. The dual-frequency inverted-F antenna 200 of the present embodiment designs a curved structure 33a on the short-circuit pin 23 of the dual-frequency inverted-F antenna 100 of the first embodiment. When the pin 33 is transmitted to the ground component 32 , on the curved structure 33 a , the currents transmitted by the signals flow in opposite directions and cancel each other out, thereby reducing interference to the radiation end. When the high-frequency signal is fed into the signal feeding part 34 and transmitted to the ground component 32 through the bent short-circuit pin 33 , the currents transmitted by the signal flow in the same direction on the bent structure 33 a and cancel each other out, thereby increasing energy radiation.

Please refer to FIG. 4 , which is a schematic diagram of a third embodiment of the present invention. The structure of the third embodiment of the present utility model is substantially the same as that of the second embodiment, the difference is that the first radiation part 45 of the third embodiment includes a flat metal 45a and a rectangular metal flat 45b, and one end of the flat metal 45a is vertically connected to the rectangular Metal plate 45b. The second radiating portion 46 includes a flat metal 46a and a rectangular metal flat 46b. One end of the flat metal plate 46a has a meandering structure, and the rectangular metal plate 46b is vertically connected to the meandering structure.

The third embodiment is applied to a large-sized antenna of a wireless wide area network (Wireless Wide Area Network, WWAN), and of course antennas of different sizes or shapes may be designed for different network systems or requirements.

Please refer to FIG. 5 , which is a schematic diagram of a fourth embodiment of the present invention. The structure of the fourth embodiment of the present invention is substantially the same as that of the second embodiment, except that the first radiation portion 55 of the fourth embodiment includes a flat metal plate 55a, a meandering metal plate 55b and a rectangular metal plate 55c. One end of the flat metal 55a has a meandering structure, and the rectangular metal plate 55c is vertically connected to the meandering structure. The meandering metal plate 55b is vertically connected to one side of the rectangular metal plate 55c. The second radiating portion 56 includes a flat metal plate 56a, a meandering metal plate 56b, and a rectangular metal plate 56c. One end of the flat metal plate 56a has a meandering structure, and the rectangular metal plate 56c is vertically connected to the meandering structure. The meandering metal plate 56b is vertically connected to one side of the rectangular metal plate 56c.

The fourth embodiment is applied to a small-sized antenna of a wireless wide area network (Wireless Wide Area Network, WWAN). Of course, antennas of different sizes or shapes can be designed for different network systems or requirements.

Please refer to FIG. 6 , which is a simulation diagram of the return loss value of the second embodiment of the present invention. As can be seen from Figure 6, the return loss value measured at high frequency (1710MHz~2170MHz) is less than the return loss value measured at low frequency (824MHz~960MHz), indicating that the dual-frequency inverted F type of the present invention The antenna has the effect of enhancing energy at high frequencies.

Please refer to FIG. 7 , which is a current simulation diagram of the second embodiment of the present invention at low frequency. It can be seen from FIG. 7 that when the input signal is a low-frequency signal of 1000 MHz, the current flow on the curved structure is opposite, and the energy cancels each other out, which can reduce the interference of the curved short-circuit pin to the radiation component of the dual-frequency inverted-F antenna.

Please refer to FIG. 8 , which is a current simulation diagram of the second embodiment of the present invention at high frequency. It can be seen from FIG. 8 that when the input signal is a high-frequency signal of 1700 MHz, the currents on the curved structure flow in the same direction, which can increase energy radiation.

Please refer to FIG. 9 , which is a standing wave ratio measurement diagram of the third embodiment of the present invention. It can be seen from FIG. 9 that the standing wave ratio of the third embodiment is up to 5.1 when the low frequency is 824MHz~960MHz, and the average standing wave ratio is about 2 when the high frequency is 1710MHz~2170MHz.

Please refer to FIG. 10 , which is a table of average gain and efficiency measured at low frequency of the third embodiment of the present invention. It can be seen from Figure 10 that when the low frequency is 824MHz~960MHz, the average gain is about -3dB, and the efficiency is about 50%.

Please refer to FIG. 11 , which is a table of average gain and efficiency measured at high frequencies in the third embodiment of the present invention. It can be seen from Figure 11 that when the high frequency is 1710MHz~2170MHz, the average gain is about -3dB, and the efficiency is about 50%. It can be seen from FIG. 10 and FIG. 11 that the dual-frequency inverted-F antenna of the third embodiment of the present invention has better efficiency and lower energy loss at high frequencies than at low frequencies.

Please refer to FIG. 12 , which is a measurement diagram of the standing wave ratio of the fourth embodiment of the present invention. It can be seen from FIG. 12 that the standing wave ratio of the fourth embodiment is mostly below 2 when the low frequency is 824MHz~960MHz, and the standing wave ratio is mostly below 2 when the high frequency is 1710MHz~2170MHz.

Please refer to FIG. 13 , which is a table of average gain and efficiency measured at low frequency of the fourth embodiment of the present invention. It can be seen from Figure 13 that there will be greater energy loss at frequencies close to both ends of the frequency band 824MHz~960MHz, and the efficiency will also drop below 10%.

Please refer to FIG. 14 , which is a table of average gain and efficiency measured at high frequency in the fourth embodiment of the present invention. It can be seen from Figure 14 that when the high frequency is 1710MHz~2170MHz, the average gain is about -3dB and the efficiency is about 50% at the frequency part above 1930MHz. But in the frequency part below 1930MHz, the lower the frequency, the worse the average gain value and efficiency.

Certainly, the utility model also can have other various embodiments, under the situation of not departing from the spirit and essence of the utility model, those skilled in the art can make various corresponding changes and distortions according to the utility model, but these Corresponding changes and deformations should all belong to the scope of protection of the appended claims of the utility model.

Claims (17)

1. A dual-frequency inverted-F antenna, characterized in that it comprises: A radiating component has a first radiating part and a second radiating part, the first radiating part wirelessly transmits and receives a first frequency band signal, and the second radiating part wirelessly transmits and receives a second frequency band signal; a grounding component spaced opposite to the radiating component; a shorting pin, located between the radiating element and the grounding element, the two ends of the shorting pin are vertically connected to the radiating element and the grounding element; and A signal feed-in part, one end of the signal feed-in part is vertically connected to the radiation component, and the other end extends toward the ground component. 2. The dual-frequency inverted-F antenna according to claim 1, wherein the short-circuit pin is connected to the same side of the radiation element as the signal feeding part. 3. The dual-frequency inverted-F antenna according to claim 1, wherein the length of the first radiating portion is between one-third and one-fifth of the wavelength of the first frequency band signal. 4. The dual-frequency inverted-F antenna according to claim 1, wherein the length of the second radiating portion is between one-third and one-fifth of the wavelength of the second frequency band signal. 5. The dual-frequency inverted-F antenna according to claim 1, characterized in that, the middle of the short-circuit pin presents a curved structure to form a curved short-circuit pin, and one end of the signal feeding part is vertically connected to the curved short-circuit pin on the radiating element. 6. The dual-frequency inverted-F antenna according to claim 5, wherein the curved short-circuit pin includes a first arm, a second arm and the curved structure, wherein one end of the first arm is perpendicular to Connected to the radiation component, the other end extends toward the ground component, and is connected to one end of the curved structure; one end of the second arm is vertically connected to the ground component, and the other end extends toward the radiation component, and is connected to the curved structure. the other end of the structure. 7. The dual-frequency inverted-F antenna according to claim 5, wherein the curved structure is in the shape of a ㄇ or a horseshoe. 8. The dual-frequency inverted-F antenna according to claim 5, wherein the curved structure is in the same direction as the first radiating part. 9. The dual-frequency inverted-F antenna according to claim 5, wherein the curved structure is in the same direction as the second radiating part. 10. The dual-frequency inverted-F antenna according to claim 5, wherein the length of the first radiating part is between one-third and one-fifth of the wavelength of the signal in the first frequency band. 11. The dual-frequency inverted-F antenna according to claim 5, wherein the length of the second radiating portion is between one-third and one-fifth of the wavelength of the signal in the second frequency band. 12. The dual-frequency inverted-F antenna according to claim 5, wherein the first radiating part is a flat metal. 13. The dual-frequency inverted-F antenna according to claim 5, wherein the first radiating part comprises a flat metal plate, a meandering metal plate and a rectangular metal plate, and one end of the plate-shaped metal has a meandering A meandering structure, and the rectangular metal flat plate is vertically connected to the meandering structure, and the meandering metal flat plate is vertically connected to one side of the rectangular metal flat plate. 14. The dual-frequency inverted-F antenna according to claim 5, wherein the first radiating part comprises a flat metal plate and a rectangular metal plate, and one end of the flat metal plate is vertically connected to the rectangular metal plate. 15. The dual-frequency inverted-F antenna according to claim 5, wherein the second radiating part is a flat metal. 16. The dual-frequency inverted-F antenna according to claim 5, wherein the second radiating part comprises a flat metal plate, a meandering metal plate and a rectangular metal plate, and one end of the plate-like metal has a meandering A meandering structure, and the rectangular metal flat plate is vertically connected to the meandering structure, and the meandering metal flat plate is vertically connected to one side of the rectangular metal flat plate. 17. The dual-frequency inverted-F antenna according to claim 5, wherein the second radiating part comprises a flat metal plate and a rectangular metal plate, one end of the flat metal has a meandering structure, and the rectangular Metal plates connect vertically to the meandering structure.

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