CN201937009U - Broadband Inverted-F Antenna - Google Patents

Abstract

A broadband inverted-F antenna includes a radiation element, a grounding element, a short-circuit pin, a signal feed-in portion and a parasitic element. The radiating element is provided with a first radiating part and a second radiating part which are used for wirelessly receiving and transmitting a first frequency band signal and a second frequency band signal respectively. The ground element is spaced opposite the radiating element. The short-circuit pin is connected between the radiation element and the grounding element. One end of the signal feed-in part is vertically connected with the radiation element, and the other end of the signal feed-in part extends towards the grounding element. The parasitic element is formed by extending from the grounding element and is overlapped with one of the first radiation part and the second radiation part. Therefore, the broadband inverted-F antenna can form at least one resonance mode, and simultaneously, the bandwidth of the receiving and transmitting signals is increased, and the antenna efficiency is greatly improved.

Description

Broadband Inverted-F Antenna

technical field

The utility model relates to a broadband inverted-F antenna, in particular to a broadband inverted-F antenna with parasitic elements formed by extending ground elements to increase antenna resonance modes.

Background technique

In recent years, due to the popularization of consumer electronic products such as notebook computers and Personal Digital Assistants (PDAs), and the rapid development of the Internet, information in different regions of the world can be exchanged and linked. Today's Internet interconnection architecture has gradually changed from wired connections such as optical fibers, cables, and cables to wireless connections. The circuit layout of the network architecture is too complicated, while providing users with a more convenient and humanized communication environment.

Due to the wireless communication technology that uses electromagnetic waves to transmit signals, it can achieve the effect of communicating with remote devices without using 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 an existing inverted-F antenna. The inverted-F antenna 10 has a strip-shaped radiating element 1 , a plate-shaped grounding element 2 opposite to the radiating element 1 , 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 radiating element 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 . The length L of the right path can be equivalent to the length of the part on the right side of the signal feeding part 4 in the radiation element 1 , which is approximately equal to a quarter of a 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 .

Since the existing inverted-F antenna can only be used to send and receive a single signal, it cannot be effectively applied to the current multi-tasking requirements. Secondly, the existing inverted-F antenna only has a single resonant mode, and cannot broadly increase its effective bandwidth. Therefore, how to provide an inverted-F antenna with multiple resonance modes and capable of transmitting and receiving broadband signals is one of the problems to be solved urgently by those in the relevant design field.

Utility model content

To sum up, the purpose of the present invention is to provide a broadband inverted-F antenna with resonance modes in different bandwidths, so as to solve the existing problems.

In order to achieve the above object, the utility model proposes a broadband inverted-F antenna, comprising:

A radiating element having a first radiating part for wirelessly transmitting and receiving a first frequency band signal and a second radiating part for wirelessly transmitting and receiving a second frequency band signal;

a grounding element spaced opposite to the radiating element;

a short-circuit pin connected between the radiation element and the ground element;

a signal feed-in part, one end of the signal feed-in part is vertically connected to the radiation element, and the other end extends toward the ground element; and

A parasitic element, the parasitic element is extended from the ground element, and overlaps with one of the first radiating part and the second radiating part, so that the broadband inverted-F antenna increases at least one resonance mode (resonance mode) ).

In the broadband inverted-F antenna mentioned above, the parasitic element and the first radiation part are located on the same side of the short-circuit pin.

In the broadband inverted-F antenna described above, the parasitic element has a first extension section and a second extension section, the first extension section extends toward the first radiating portion, and the second extension section faces the short-circuit pin extended to overlap with the first radiating portion.

In the broadband inverted-F antenna described above, the parasitic element has a first extension section and a second extension section, the first extension section extends toward the first radiation portion, and the second extension section is oriented opposite to the short circuit The direction of the pin extends to overlap with the first radiating portion.

In the broadband inverted-F antenna mentioned above, the parasitic element and the second radiation part are located on the same side of the short-circuit pin.

In the above-mentioned broadband inverted-F antenna, wherein the parasitic element has a first extension section and a second extension section, the first extension section extends toward the second radiating portion, and the second extension section is oriented opposite to the short circuit The direction of the pin extends to overlap with the second radiating portion.

In the broadband inverted-F antenna mentioned above, the first radiating part is a flat metal.

In the above-mentioned broadband inverted-F antenna, the length of the first radiating part is between one-third wavelength and one-fifth wavelength of the signal wavelength of the first frequency band.

In the broadband inverted-F antenna mentioned above, the second radiating part is a flat metal.

In the above-mentioned broadband inverted-F antenna, the length of the second radiating part is between one-third wavelength and one-fifth wavelength of the signal wavelength of the second frequency band.

Therefore, the effect of the utility model is that, in addition to increasing the radiation part on the existing inverted-F antenna to achieve the dual-frequency effect, the parasitic element formed by the extension of the grounding element is also used to increase the bandwidth range of the inverted-F antenna and Resonant mode, thereby greatly improving the application efficiency of existing antennas.

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 an existing inverted-F antenna;

2A is a schematic structural diagram of a broadband inverted-F antenna according to the first embodiment of the present invention;

2B is a schematic structural diagram of a broadband inverted-F antenna according to a second embodiment of the present invention;

3A is a schematic structural diagram of a broadband inverted-F antenna according to a third embodiment of the present invention;

3B is a schematic structural diagram of a broadband inverted-F antenna according to a fourth embodiment of the present invention;

4 is a schematic structural diagram of a broadband inverted-F antenna according to a fifth embodiment of the present invention;

Fig. 5 is a structural schematic diagram of a broadband inverted-F antenna applied to a circuit board according to the first embodiment of the present invention;

FIG. 6 is a measurement diagram of standing wave ratio data according to an embodiment of the present invention.

Among them, reference signs

1 radiating element

2 ground element

3 short circuit pins

4 Signal feed-in part

10 Inverted F Antenna

21 radiating elements

22 ground element

23 short circuit pin

24 Signal feed-in part

25 parasitic elements

25a Parasitic elements

25b Parasitic elements

25c parasitic elements

25d parasitic elements

100 Broadband Inverted-F Antenna

100a Broadband Inverted-F Antenna

100b Broadband Inverted-F Antenna

100c Broadband Inverted F Antenna

100d broadband inverted F antenna

211 First Radiant Department

212 Second Radiant Department

251 first extension

252 second extension

Detailed ways

The detailed features and advantages of the present utility model are described in detail below in the implementation manner, and its content is enough to make any person skilled in the art understand the technical content of the present utility model and implement it accordingly, and according to the content disclosed in this specification, the scope of claims and With the accompanying drawings, anyone skilled in the art can easily understand the purpose and advantages of the utility model. The following examples further describe the viewpoints of the present utility model in detail, but do not limit the scope of the present utility model in any way.

FIG. 2A is a schematic structural diagram of a broadband inverted-F antenna according to the first embodiment of the present invention. The broadband inverted-F antenna 100 includes a radiation element 21 , a ground element 22 , a short pin 23 , a signal feeding part 24 and a parasitic element 25 .

The radiating element 21 is spaced opposite to the grounding element 22, and includes a first radiating portion 211 and a second radiating portion 212, wherein the first radiating portion 211 is used to send and receive signals in the first frequency band, and the second radiating portion 212 is used to send and receive signals in the second frequency band. Signal. Generally speaking, the lengths of the first radiating portion 211 and the second radiating portion 212 can be designed to be equal to a quarter wavelength of the first frequency band signal and the second frequency band signal respectively, but not limited thereto. For example, the lengths of the first radiating portion 211 and the second radiating portion 212 may also be between one-third to one-fifth of the wavelength of the first frequency band signal and the second frequency band signal. Wherein, the frequency band of the first frequency band signal may be 824 megahertz (MHz) to 960 megahertz (MHz), and of course other frequency bands may also be used. The frequency band of the second frequency band signal may be 1710MHz-2170MHz, and of course other frequency bands may also be used. The shapes of the first radiating portion 211 and the second radiating portion 212 can be flat metal respectively.

The ground element 22 is spaced opposite to the radiation element 21, and the ground element 22 can be a single flat metal, or has a flat metal spaced opposite to the radiation element 21, and is vertically connected to one side of the flat metal and faces away from the radiation element 21. Composed of rectangular metal plates extending in the direction of

One end of the signal feeding part 24 is vertically connected to the radiating element 21 , and the other end is extended toward the ground element 22 but not in contact with the ground element 22 for feeding in or out the first frequency band signal and the second frequency band signal. Generally speaking, the signal feed-in portion 24 is fed with a signal by a 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 feeding part 24 , and the ground layer is connected to the ground element 22 , so as to complete the signal transceiving of the broadband inverted-F antenna 100 .

The short-circuit pin 23 is located between the radiating element 21 and the grounding element 22, and its shape can be a straight pin whose two ends are vertically connected to the radiating element 21 and the grounding element 22, or a curved pin with one or more meandering arms. foot. The shape of the short-circuit pin 23 is not intended to limit the scope of the present invention, and it transmits the first frequency band signal and the second frequency band signal from the radiation element 21 to the ground element 22 through the short-circuit pin 23 . 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 element 22 to be connected to the ground element 22 .

The parasitic element 25 is formed by extending from the ground element 22 , and the parasitic element 25 mainly includes a first extension section 251 and a second extension section 252 . As shown in the first embodiment of the present invention ( FIG. 2A ), the parasitic element 25 and the first radiation portion 211 of the radiation element 21 are located on the same side of the short-circuit pin 23 . Here, the first extension section 251 is formed by extending from the ground element 22 first, and extends towards the direction of the first radiation portion 211 . After being bent, it is connected to the second extension section 252 , and then extends toward the short-circuit pin 23 so as to overlap with the first radiation portion 211 .

Wherein, the shape of the parasitic element 25 is not limited to that shown in FIG. 2A . Please also refer to FIG. 2B , which is a schematic structural diagram of a broadband inverted-F antenna according to a second embodiment of the present invention. The broadband inverted-F antenna 100 a also includes a radiation element 21 , a ground element 22 , a short-circuit pin 23 , a signal feeding part 24 and a parasitic element 25 a. Only the extension and meandering shape of the parasitic element 25a can be tuned according to the actual requirements of the antenna, and are not used to limit the scope of the present invention, but can also be used to realize the efficacy of the present invention.

FIG. 3A is a schematic structural diagram of a broadband inverted-F antenna according to a third embodiment of the present invention. Wherein, the broadband inverted-F antenna 100b includes a radiation element 21 , a ground element 22 , a short-circuit pin 23 , a signal feeding part 24 and a parasitic element 25b. Wherein, the radiating element 21 , the grounding element 22 , the shorting pin 23 , the signal feeding part 24 and the parasitic element 25 b are the same as the first embodiment of the present invention, so it will not be described again. Only in the broadband inverted-F antenna according to the third embodiment of the present invention, the second extension section 252 of the parasitic element 25b extends in a direction opposite to the short-circuit pin 23, so as to overlap with the first radiation portion 211 (overlap).

Secondly, like the second embodiment of the present invention, the shape of the parasitic element 25b is not limited to that shown in FIG. 3A . Please also refer to FIG. 3B , which is a schematic structural diagram of a broadband inverted-F antenna according to a fourth embodiment of the present invention. The broadband inverted-F antenna 100c also includes a radiation element 21, a ground element 22, a short-circuit pin 23, a signal feeding part 24, and a parasitic element 25c. Only the extension and meandering shape of the parasitic element 25c are designed (tuned) according to the actual requirements of the antenna, and are not used to limit the scope of the present invention, but can also be used to realize the functions of the present invention.

Fig. 4 is a schematic structural diagram of a broadband inverted-F antenna according to a fifth embodiment of the present invention. Wherein, the broadband inverted-F antenna 100d includes a radiation element 21 , a ground element 22 , a short-circuit pin 23 , a signal feeding part 24 and a parasitic element 25d. Wherein, the radiating element 21 , the grounding element 22 , the short-circuit pin 23 and the signal feed-in portion 24 are the same as the first to fourth embodiments of the present invention, so it will not be described again. Only in the broadband inverted-F antenna according to the fifth embodiment of the present invention, the parasitic element 25 d and the second radiation portion 212 of the radiation element 21 are located on the same side of the short-circuit pin 23 .

Wherein, the first extension section 251 of the parasitic element 25d is formed by extending from the ground element 22 first, and extends toward the direction of the second radiation portion 212 . After being bent, it is connected to the second extension section 252 , and then extends toward the direction opposite to the short-circuit pin 23 to overlap with the second radiation portion 212 .

Therefore, according to the broadband inverted-F antennas 100, 100a, 100b, 100c, and 100d of the first to fifth embodiments of the present utility model, the first frequency band signal and the second frequency band signal are fed in through the signal feeding part 24, and the first frequency band signal is fed through the first The radiating part 211 and the second radiating part 212 send and receive signals of two frequency bands respectively. The broadband inverted-F antenna proposed by the utility model also overlaps (overlaps) the length of the first radiating part 211 or the second radiating part 212 through the parasitic elements 25, 25a, 25b, 25c, 25d extending from the grounding element 22. , to form the resonant mode of the inverted-F antenna, and improve the frequency range of its receiving and transmitting signals, so as to solve the problem of the limited bandwidth of the existing inverted-F antenna.

Next, FIG. 5 is a schematic structural diagram of a broadband inverted-F antenna applied to a printed-circuit board (PCB) according to the first embodiment of the present invention. It is worth noting that the broadband inverted-F antennas 100a, 100b, 100c, and 100d of other embodiments of the present invention (including the second to fifth embodiments) can all be applied to circuit boards (PCBs) as shown in FIG. 5 ) on the planar structure to serve as an antenna module for subsequent electronic devices to send and receive electromagnetic wave signals.

Hereinafter, please refer to the table below and FIG. 6 together. FIG. 6 is a measurement diagram of VSWR (Voltage Standing Wave Ratio, VSWR) data according to an embodiment of the present invention.

In summary, the broadband inverted-F antenna proposed by the present invention can form a resonance mode when the 3G Rx low frequency is 869MHz-960MHz, and the average efficiency is about 40%. When the global positioning system (Global Positioning System, GPS) high frequency is 1565MHz ~ 1585MHz, a resonance mode can also be formed, and the average efficiency is about 40%. And when the 3G Rx high-frequency bandwidth is 1930MHz-2170MHz, or even when the Worldwide Interoperability for Microwave Access (WIMAX) high-frequency bandwidth is 2300MHz-2700MHz, a resonance mode with an average efficiency of 40% can also be formed.

Therefore, the broadband inverted-F antenna proposed according to the utility model can not only be used to increase the resonance mode of the existing inverted-F antenna, but also has good antenna efficiency and low energy loss at high and low frequencies, greatly improving Antenna application benefits.

Of course, the utility model can also have other various embodiments, and those skilled in the art can make various corresponding changes and deformations according to the utility model without departing from the spirit and essence of the utility model, but These corresponding changes and deformations should all belong to the protection scope of the appended claims of the present utility model.

Claims (10)

1. A broadband inverted-F antenna, characterized in that it comprises: A radiating element having a first radiating part for wirelessly transmitting and receiving a first frequency band signal and a second radiating part for wirelessly transmitting and receiving a second frequency band signal; a grounding element spaced opposite to the radiating element; a short-circuit pin connected between the radiation element and the ground element; a signal feed-in part, one end of the signal feed-in part is vertically connected to the radiation element, and the other end extends toward the ground element; and A parasitic element is formed extending from the ground element and overlaps with one of the first radiating part and the second radiating part, so as to increase at least one resonance mode of the broadband inverted-F antenna. 2 . The broadband inverted-F antenna according to claim 1 , wherein the parasitic element and the first radiation part are located on the same side of the short-circuit pin. 3 . 3. The broadband inverted-F antenna according to claim 2, wherein the parasitic element has a first extension section and a second extension section, the first extension section extends toward the first radiation portion, the The second extension section extends toward the short-circuit pin to overlap with the first radiation portion. 4. The broadband inverted-F antenna according to claim 2, wherein the parasitic element has a first extension section and a second extension section, the first extension section extends toward the first radiating portion, the The second extension section extends in a direction opposite to the short-circuit pin to overlap with the first radiation portion. 5 . The broadband inverted-F antenna according to claim 1 , wherein the parasitic element and the second radiation part are located on the same side of the short-circuit pin. 6. The broadband inverted-F antenna according to claim 5, wherein the parasitic element has a first extension section and a second extension section, the first extension section extends toward the second radiation portion, the The second extension section extends in a direction opposite to the short-circuit pin to overlap with the second radiation portion. 7 . The broadband inverted-F antenna according to claim 1 , wherein the first radiating part is a flat metal. 8 . The broadband 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. 9. The broadband inverted-F antenna according to claim 1, wherein the second radiating part is a flat metal. 10 . The broadband 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. 11 .

Images