TWI671949B - Antenna structure - Google Patents

Abstract

The invention discloses an antenna structure, which comprises a radiating element, a grounding element, a feeding element and an electrostatic protection unit. The feeding element is electrically connected between the radiating element and the grounding element. The feeding element has a feeding end electrically connected to the radiating element and an electrical connection to the grounding terminal of the grounding element. The feeding end is electrically connected to the radiating element. A feed point. The electrostatic protection unit is electrically connected between the radiation member and the grounding member, and the electrostatic protection unit is electrically connected with the grounding member at a ground. A ground path is formed between the feed point and the ground through the electrostatic protection unit. The ground path has an electrical length that is greater than a quarter of the corresponding length when the antenna structure operates at a minimum operating frequency in a working frequency band. Wavelength, and the electrical length is less than or equal to half the wavelength corresponding to the antenna structure operating at the lowest operating frequency in the operating frequency band.

Description

Antenna structure

The invention relates to an antenna structure, in particular to an antenna structure capable of improving the electrostatic protection effect.

First, in the prior art, the RF Front-End Module has a poor resistance to Electrostatic Discharge (ESD), so the chip is easily affected by the electrostatic discharge and damaged.

Next, in the prior art, if the chip (or circuit) on the radio frequency circuit is to be protected, an electrostatic protection element (such as a transient voltage suppressor (TVS)) is usually provided. However, as the operating frequency of signals transmitted on radio frequency signal transmission lines is getting higher and higher, currently only electrostatic protection components with low stray capacitance (parasitic capacitance) can be selected. In addition, when the capacitance value of the selected electrostatic protection element is lower, the effect of electrostatic protection is lower. For example, when the operating frequency is between 5GHz and 6GHz, the electrostatic protection components that can be used can only choose a specification of about 0.2pF. When the chip's electrostatic discharge protection capability is too low, in order to transmit higher frequency signals, a low capacitance value (for example, less than 0.2pF) is used for the electrostatic protection element. However, the electrostatic protection element with a low capacitance value is electrostatically protected. The capability is low and may not provide effective electrostatic protection, and the wafer will still be affected by electrostatic discharge.

Further, although the electrostatic discharge protection capability of the electrostatic protection element with a high capacitance value (parasitic capacitance) is better than the electrostatic discharge protection capability of the electrostatic protection element with a low capacitance value. However, high-capacitance ESD protection components cause RF efficiency to decrease. In other words, an excessively high capacitance value will cause a high-frequency signal to be directly transmitted to the ground, resulting in a significant reduction in RF efficiency.

The technical problem to be solved by the present invention is to provide an antenna structure for the disadvantages of the prior art to improve the effect of electrostatic protection.

In order to solve the above technical problems, one of the technical solutions adopted by the present invention is to provide an antenna structure including a first radiating element, a second radiating element, a feeding element and an electrostatic protection unit. The feeding element is electrically connected between the first radiating element and the second radiating element. The feeding element has a feeding end and a ground terminal, and the feeding end is electrically connected to the first radiating element. The ground terminal is electrically connected to the second radiating element, and the feeding terminal is electrically connected to the first radiating element at a feeding point. The electrostatic protection unit is electrically connected between the first radiating element and the second radiating element. The electrostatic protection unit includes a transient voltage suppression element and a conductive element electrically connected to the transient voltage suppression element. The protection unit is electrically connected to the second radiation element at a ground. Wherein, a ground path is formed between the feeding point and the ground through the electrostatic protection unit, and the ground path has an electrical length that is longer than a minimum operating frequency of the antenna structure operating in a working frequency band. A corresponding 1/2 wavelength, and the electrical length is less than or equal to the wavelength when the antenna structure is operated at the lowest operating frequency in the operating frequency band.

In order to solve the above technical problem, another technical solution adopted by the present invention is to provide an antenna structure including a radiating member, a grounding member, a feeding member, and an electrostatic protection unit. The feeding member is electrically connected between the radiating member and the grounding member. The feeding member has a feeding end and a grounding terminal, the feeding terminal is electrically connected to the radiating member, and the grounding terminal is electrically connected. At the grounding member, the feeding end is electrically connected to the radiator at a feeding point. The electrostatic protection unit is electrically connected between the radiation element and the grounding element. The electrostatic protection unit includes a transient voltage suppression element and a conductive element electrically connected to the transient voltage suppression element. The electrostatic protection unit is electrically Connect the grounding element to a ground. A ground path is formed between the feeding point and the ground through the electrostatic protection unit. The ground path has an electrical length that is greater than a minimum operating frequency of the antenna structure operating in a working frequency band. The wavelength corresponds to 1/4 times the wavelength, and the electrical length is less than or equal to the ½ times the wavelength when the antenna structure is operated at the lowest operating frequency in the operating frequency band.

One of the beneficial effects of the present invention is that the antenna structure provided by the embodiment of the present invention can use "the feed point to be electrically connected to the ground through the electrostatic protection unit to form a ground path. The ground path has An electrical length that is greater than 1/2 the wavelength corresponding to a minimum operating frequency of the antenna structure operating in an operating frequency band, and the electrical length is less than or equal to the minimum of the antenna structure operating in the operating frequency band The technical solution of “wavelength corresponding to operating frequency”, or using “the feed point is electrically connected to the ground through the electrostatic protection unit to form a ground path, the ground path has an electrical length, and the electrical length Greater than the quarter-wavelength corresponding to the antenna structure operating at a lowest operating frequency in an operating frequency band, and the electrical length being less than or equal to 1 corresponding to the antenna structure operating at the lowest operating frequency in the operating frequency band / 2 times the wavelength "technology solution to enhance the effect of electrostatic protection.

In order to further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are only for reference and explanation, and are not intended to limit the present invention.

U, U’‧‧‧ Antenna Structure

1‧‧‧ the first radiation

1‧‧‧ radiation

11‧‧‧First Radiation Department

12‧‧‧Second Radiation Department

13‧‧‧Feeding Department

2‧‧‧Second radiator

21‧‧‧Third radiation department

22‧‧‧Fourth Radiation Department

23‧‧‧ Ground

3‧‧‧ Feed

31‧‧‧feed side

32‧‧‧ Ground

4, 4’‧‧‧ static protection unit

41‧‧‧Transient Voltage Suppression Components

42‧‧‧Conductive parts

421‧‧‧The first conductive part

422‧‧‧Second conductive section

5‧‧‧ grounding piece

S‧‧‧ substrate

F‧‧‧ Feed

G‧‧‧ Ground

C‧‧‧ Junction

X, Y‧‧‧ directions

FIG. 1 is a schematic plan view of an antenna structure according to a first embodiment of the present invention.

FIG. 2 is a schematic top view of another embodiment of the antenna structure according to the first embodiment of the present invention.

FIG. 3 is a schematic top view of a conventional antenna structure.

FIG. 4 is a graph of voltage standing wave ratios of the antenna structure of FIG. 3 at different frequencies.

FIG. 5 is a schematic top view of an antenna structure according to an embodiment of the present invention.

FIG. 6 is a graph of voltage standing wave ratios of the antenna structure of FIG. 5 at different frequencies.

FIG. 7 is a schematic top view of another embodiment of the antenna structure according to the first embodiment of the present invention.

FIG. 8 is a schematic top view of another embodiment of the antenna structure according to the first embodiment of the present invention.

FIG. 9 is a schematic top view of another embodiment of the antenna structure according to the first embodiment of the present invention.

FIG. 10 is a schematic top view of an antenna structure according to a second embodiment of the present invention.

FIG. 11 is a schematic top view of another embodiment of the antenna structure according to the second embodiment of the present invention.

FIG. 12 is a schematic top view of another embodiment of the antenna structure according to the second embodiment of the present invention.

FIG. 13 is a schematic top view of another embodiment of the antenna structure according to the second embodiment of the present invention.

14 is a schematic plan view of another embodiment of the antenna structure according to the second embodiment of the present invention.

FIG. 15 is a schematic top view of another embodiment of the antenna structure according to the second embodiment of the present invention.

The following is a description of specific embodiments of the "antenna structure" disclosed in the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be based on different viewpoints and applications, and various modifications and changes can be made without departing from the concept of the present invention. In addition, the drawings of the present invention are merely a schematic illustration, and are not drawn according to actual dimensions, and are stated in advance. The following embodiments will further describe the related technical content of the present invention in detail, but the disclosed content is not intended to limit the protection scope of the present invention.

It should be understood that although the terms first, second, third, etc. may be used herein to describe various elements or signals, these elements or signals should not be limited by these terms. These terms are mainly used to distinguish one element from another, or a signal and Another signal. In addition, the term "or" as used herein should, depending on the actual situation, include any one or more of the associated listed items.

[First embodiment]

First, please refer to FIG. 1, which is a schematic plan view of an antenna structure according to a first embodiment of the present invention. The invention provides an antenna structure U, which includes a first radiating element 1, a second radiating element 2, a feeding element 3, and an electrostatic protection unit 4. For example, the first radiating element 1, the second radiating element 2, and the electrostatic protection unit 4 may be disposed on a substrate S. In addition, for example, the first radiating member 1 and the second radiating member 2 may be a metal sheet, a metal wire, or other conductive bodies having a conductive effect, and the substrate S may be a printed circuit board (Printed circuit board, PCB), but the present invention is not limited to the above examples.

Following the above, please refer to FIG. 1 again. The feeding element 3 can be electrically connected between the first radiating element 1 and the second radiating element 2 for feeding a signal. In addition, the feeding member 3 may have a feeding terminal 31 and a ground terminal 32. The feeding terminal 31 may be electrically connected to the first radiating member 1, and the ground terminal 32 may be electrically connected to the second radiating member 2. The input end 31 can be electrically connected to the first radiating element 1 at a feeding point F. That is, the electrical connection point between the feeding end 31 and the first radiating element 1 may be defined as the feeding point F. In addition, it is worth noting that the feeding member 3 may be a coaxial cable, but the present invention is not limited thereto. It should be noted that, in order to make the drawings easy to understand, the feed-in 3 except for the schematic diagram of the antenna structure U implemented on the substrate S, in other drawings, substitute symbols as the coaxial as shown in Figure 1. Cable architecture. In addition, it should be particularly noted that the electrical connection throughout the present invention may be a direct electrical connection or an indirect electrical connection, and the present invention is not limited thereto.

Following the above, please refer to FIG. 1 again. The electrostatic protection unit 4 can be electrically connected between the first radiating element 1 and the second radiating element 2. The electrostatic protection unit 4 can include a transient voltage suppression element 41 and an electrical The conductive member 42 is connected to the transient voltage suppression element, and the electrostatic protection unit 4 can be electrically connected to the second radiating member 2 at a ground G. That is, the electrical connection between the electrostatic protection unit 4 and the second radiating member 2 may be defined as a ground G. In addition, for example, the transient voltage suppression element 41 may be a transient voltage suppressor (Transient Voltage Suppressor, TVS), but the present invention is not limited thereto. Further, in the embodiment of FIG. 1, the conductive member 42 may include a first conductive portion 421 and a second conductive portion 422, and the transient voltage suppressing element 41 may be electrically connected to the transient voltage through two respectively. The first conductive portion 421 and the second conductive portion 422 on both sides of the suppressing element 41 are electrically connected between the first radiating element 1 and the second radiating element 2. However, the present invention does not use the conductive element 42 and the transient voltage suppressing element. The connection method of 41 is limited.

Continuing the above, further, please refer to FIG. 1 again, the feeding point F can be electrically connected to the grounding point G through the electrostatic protection unit 4 to form a ground path. In other words, the feeding point F and the grounding point Between G, a ground path can be formed by the provision of the electrostatic protection unit 4. In addition, the ground path may have an electrical length. The electrical length may be greater than 1/2 the wavelength corresponding to the antenna structure U operating at a minimum operating frequency in a working frequency band, and the electrical length may be less than or equal to the wavelength corresponding to the antenna structure operating at the minimum operating frequency in the operating frequency band . For example, in the first embodiment, the antenna structure U may be a single-frequency dipole antenna, and the frequency range of the operating frequency band may be between 5 GHz and 6 GHz. However, the present invention is not limited to this. That is, in other embodiments, the antenna structure U may be a dual-frequency dipole antenna, a single-frequency monopole antenna, or a dual-frequency monopole antenna. Therefore, since the frequency range of the operating frequency band of the first embodiment of the present invention is between 5 GHz and 6 GHz, the electrical length of the ground path can be calculated using 5 GHz as a parameter. At the same time, the dielectric coefficient of the substrate S can be used as a parameter for calculation. In addition, for example, the frequency range of the operating frequency band may be between 5150 MHz and 5850 MHz, but the present invention is not limited thereto.

Following the above, please refer to FIG. 1 again. The electrostatic protection unit 4 can be electrically connected to the first radiation element 1 at a connection point C, and the distance between the feeding point F and the connection point C is less than or equal to the antenna structure U. 1/16 times the wavelength of the lowest operating frequency in the operating frequency band to avoid affecting the characteristics (such as gain) of the antenna structure U. In addition, The transient voltage suppressing element 41 may select a transient capacitor having a higher capacitance value. According to the embodiment of the present invention, the capacitance of the transient voltage suppressing element 41 may be greater than 0.5 picofarad (pF). The invention is not limited to this.

Next, please refer to FIG. 2, which is a schematic top view of another embodiment of the antenna structure according to the first embodiment of the present invention. As can be seen from the comparison between FIG. 2 and FIG. 1, the present invention does not limit the setting position of the transient voltage suppression element 41. That is, as shown in FIG. 1, the conductive member 42 may include a first conductive portion 421 and a first Two conductive portions 422, and the transient voltage suppressing element 41 can be electrically connected to the first radiating element through two first conductive portions 421 and second conductive portions 422 which are electrically connected to both sides of the transient voltage suppressing element 41, respectively. 1 and the second radiation member 2. In addition, in the embodiment shown in FIG. 2, the transient voltage suppressing element 41 can be directly and electrically connected to the first radiating element 1, and can be electrically connected through the conductive element 42 electrically connected to the transient voltage suppressing element 41. Connected to the second radiator 2. Thereby, the effect of electrostatic protection is improved by forming a ground path.

Next, please refer to FIG. 3 to FIG. 6. FIG. 3 is a schematic top view of a conventional antenna structure. FIG. 4 is a graph of voltage standing wave ratios of the antenna structure of FIG. 3 at different frequencies. FIG. 5 is a schematic top view of an antenna structure according to an embodiment of the present invention. FIG. 6 is a graph of voltage standing wave ratios of the antenna structure of FIG. 5 at different frequencies. In detail, it can be seen from the comparison between the antenna structure U 'of FIG. 3 and the antenna structure U of FIG. 5 that the antenna structure U of FIG. 5 may further include an electrostatic protection unit 4' to form a ground path. In addition, it can be seen from the comparison between FIG. 4 and FIG. 6 that the antenna characteristics of the antenna structure U having a ground path are substantially the same as those of the antenna structure U 'having no ground path. Therefore, further setting the electrostatic protection unit 4 provided in the embodiment of the present invention under the existing antenna architecture will hardly affect the design of the original antenna structure U '.

Next, please refer to FIGS. 7 and 8. FIG. 7 is a schematic plan view of another embodiment of the antenna structure according to the first embodiment of the present invention, and FIG. 8 is a plan view of another embodiment of the antenna structure according to the first embodiment of the present invention. schematic diagram. It can be seen from the comparison between FIG. 7 and FIG. 8 and FIG. 1 that the antenna structure U in the embodiment of FIG. 7 and FIG. 8 may be a pair Frequency antenna structure U.

In detail, please refer to FIG. 7 and FIG. 8 again. The first radiating member 1 may have a first radiating portion 11, a second radiating portion 12, and a first radiating portion 11 and a second radiating portion 12. Between the feeding portion 13, the second radiating member 2 may have a third radiating portion 21, a fourth radiating portion 22, and a grounding portion 23 connected between the third radiating portion 21 and the fourth radiating portion 22. The first radiating section 11 and the third radiating section 21 each have a first operating frequency band, and the second radiating section 12 and the fourth radiating section 22 both have a second operating frequency band. The center frequency of the first operating frequency band may be higher than that of the second operating frequency band. The center frequency of the operating band. For example, the frequency range of the first operating frequency band may be between 5150MHz and 5850MHz, which is suitable for the 5G WLAN (Wireless LAN) frequency band, and the frequency range of the second operating frequency band may be between 2400MHz and 2500MHz, which is suitable for the 2.4G WLAN frequency band. However, the present invention is not limited to this.

Following the above, please refer to FIG. 7 and FIG. 8 again, the feeding end 31 can be electrically connected to the feeding part 13 of the first radiating element 1, and the ground end 32 can be electrically connected to the grounding part 23 of the second radiating element 2. The feeding end 31 can be electrically connected to the feeding portion 13 of the first radiator 1 at the feeding point F. According to the embodiment of FIG. 7, the electrostatic protection unit 4 can be electrically connected between the first radiating portion 11 of the first radiating member 1 and the third radiating portion 21 of the second radiating member 2. The electrostatic protection unit 4 can be electrically connected. The third radiating portion 21 of the second radiating member 2 is sexually connected to the ground G. In addition, according to the embodiment of FIG. 8, the electrostatic protection unit 4 may be electrically connected between the second radiating portion 12 of the first radiating member 1 and the fourth radiating portion 22 of the second radiating member 2. The fourth radiating portion 22 of the second radiating element 2 can be electrically connected to the ground G. In other words, the electrostatic protection unit 4 may be disposed at a position of a high-frequency radiation portion or a position of a low-frequency radiation portion. In addition, it should be particularly noted that, in the embodiments of FIGS. 7 and 8, the electrical length of the ground path is also calculated from the feeding point F to the position of the grounding point G. The electrical length of the grounding path may be greater than the antenna structure U. A wavelength corresponding to 1/2 of a minimum operating frequency in an operating frequency band, and the electrical length of the ground path may be less than or equal to the wavelength corresponding to the minimum operating frequency of the antenna structure operating in the operating frequency band.

Next, please refer to FIG. 9, which is a schematic top view of another embodiment of the antenna structure according to the first embodiment of the present invention. In other antenna structures U, an electrostatic protection unit 4 may be further provided to improve the effect of electrostatic protection. In addition, the ground path formed by the electrostatic protection unit 4 is also counted from the feed point F to the position of the ground point G. The electrical length of the ground path may be greater than that corresponding to the antenna structure U operating at a minimum operating frequency in a working frequency band. ½ of the wavelength, and the electrical length of the ground path may be less than or equal to the wavelength corresponding to the antenna structure operating at the lowest operating frequency in the operating frequency band.

[Second embodiment]

First, please refer to FIG. 10, which is a schematic plan view of an antenna structure according to a second embodiment of the present invention. A second embodiment of the present invention provides an antenna structure U, which includes a radiating member 1, a grounding member 5, a feeding member 3, and an electrostatic protection unit 4. For example, the radiation element 1 ground element 5 and the electrostatic protection unit 4 may be disposed on a substrate (not shown in the figure). In addition, for example, the radiating member 1 and the grounding member 5 may be a metal sheet, a metal wire, or other conductive bodies having a conductive effect, but the present invention is not limited to the above examples. Furthermore, it should be noted that the features of the substrate, the feeding member 3, and the electrostatic protection unit 4 described in the second embodiment are similar to the description of the previous embodiment, and are not repeated here.

Following the above, please refer to FIG. 10 again, the feeding member 3 may be electrically connected between the radiating member 1 and the grounding member 5. The feeding member 3 may have a feeding end 31 and a grounding end 32. 31 is electrically connected to the radiating member 1, the ground terminal 32 is electrically connected to the ground member 5, and the feeding terminal 31 is electrically connected to the radiating member 1 at a feeding point F. In addition, the electrostatic protection unit 4 may be electrically connected between the radiating member 1 and the grounding member 5. The electrostatic protection unit 4 may include a transient voltage suppression element 41 and a conductive member 42 electrically connected to the transient voltage suppression element 41. In addition, the electrostatic protection unit 4 can be electrically connected to the ground member 5 at a ground G. The feeding point F can be electrically connected to the grounding point G through the electrostatic protection unit 4 to form a grounding path. In other words, there can be The electrical protection unit 4 is provided to form a ground path. In addition, for example, a via hole (not shown in the figure) may be provided on the substrate, and the conductive member 42 may be electrically connected to the ground member 5 through a conductive body in the via hole. This is limited. It should be noted that, the conductive body is provided in the guide hole so that the components respectively disposed on two opposite surfaces are electrically connected. This is a technique well known to those skilled in the art, and is not repeated here.

Continuing the above, it should be particularly noted that from the comparison between FIG. 10 and FIG. 1, the difference between the second embodiment and the first embodiment is that the first embodiment is a dipole antenna, and the second embodiment is a monopole Antenna, and the grounding member 5 in the second embodiment is equivalent to a large ground. Therefore, in the second embodiment, the electrical length of the ground path may be greater than the quarter-wavelength corresponding to the antenna structure operating at a minimum operating frequency in a working frequency band, and the electrical length of the ground path is less than or equal to the antenna The structure operates at a half wavelength corresponding to the lowest operating frequency in the operating frequency band.

In addition, it is worth noting that, in the second embodiment, the electrical connection point C between the electrostatic protection unit 4 and the radiating member 1 is a connection point C, and the distance from the feeding point F to the connection point C may be Less than or equal to 1/16 times the wavelength of the antenna structure U operating at the lowest operating frequency in the operating frequency band to avoid affecting the characteristics (such as gain) of the antenna structure U. In addition, the transient voltage suppression element 41 may select a transient voltage suppression diode with a higher capacitance value. According to the embodiment of the present invention, the capacitance value of the transient voltage suppression element 41 may be greater than 0.5 picofarad (pF), However, the present invention is not limited to this.

Next, please refer to FIGS. 11 and 12. FIG. 11 is a schematic plan view of another embodiment of the antenna structure according to the second embodiment of the present invention, and FIG. 12 is a plan view of another embodiment of the antenna structure according to the second embodiment of the present invention. schematic diagram. It can be seen from the comparison between FIG. 11 and FIG. 12 and FIG. 10 that the antenna structure U in the embodiment of FIG. 11 and FIG. 12 may be a dual-frequency antenna structure U.

Following the above, as shown in FIGS. 11 and 12, the radiating member 1 may have a first radiating portion 11, a second radiating portion 12, and a feeding portion connected between the first radiating portion 11 and the second radiating portion 12. 13. The first radiating section 11 may have a first operating frequency band, and the second radiating section 12 may have a second operating frequency band, and the center frequency of the first operating frequency band Above the center frequency of the second operating band. For example, the frequency range of the first operating band may be between 5150MHz and 5850MHz, which is suitable for the 5G WLAN (Wireless LAN) band. The frequency range of the second operating band may be between 2400MHz and 2500MHz, which is suitable for the 2.4G WLAN band. However, the present invention is not limited to this.

Following the above, please refer to FIG. 11 and FIG. 12 again, the feeding end 31 can be electrically connected to the feeding portion 13 of the radiating member 1, and the feeding end 31 can be electrically connected to the feeding portion 13 of the radiating member 1 at the feeding place. F. According to the embodiment of FIG. 11, the electrostatic protection unit 4 may be electrically connected between the first radiating portion 11 of the radiating member 1 and the grounding member 5. In addition, in the embodiment of FIG. 12, the electrostatic protection unit 4 can be electrically connected between the second radiating portion 12 of the radiating member 1 and the grounding member 5. In other words, the electrostatic protection unit 4 may be disposed at a position of a high-frequency radiation portion or a position of a low-frequency radiation portion. In addition, it should be noted that, in the embodiments of FIG. 11 and FIG. 12, the electrical length of the ground path is also calculated from the feeding point F to the position of the grounding point G. The electrical length of the grounding path may be greater than that of the antenna structure. A quarter-wavelength corresponding to a lowest operating frequency in a working frequency band, and the electrical length of the ground path is less than or equal to a half-wavelength corresponding to the antenna structure operating at the lowest operating frequency in the working frequency band. .

Next, please refer to FIG. 13 to FIG. 15, which are schematic top views of other embodiments of the antenna structure according to the second embodiment of the present invention. In other antenna structures U, an electrostatic protection unit 4 may be further provided to improve the effect of electrostatic protection. In addition, as shown in FIG. 14 and FIG. 15, the electrostatic protection unit 4 may be provided at an appropriate position according to requirements. In addition, it is worth noting that the ground path formed by the electrostatic protection unit 4 is also counted from the feeding point F to the position of the grounding point G. The electrical length of the grounding path may be greater than a minimum of the antenna structure operating in a working frequency band. The wavelength corresponding to the operating frequency is 1/4 times, and the electrical length of the ground path is less than or equal to the wavelength corresponding to the antenna structure operating at the lowest operating frequency in the operating frequency band.

[Advantageous Effects of the Embodiment]

One of the beneficial effects of the present invention is that the antenna structure U provided by the embodiment of the present invention can use the "feed point F to be electrically connected to the ground point G through the electrostatic protection unit 4 to form a ground path. The ground path has An electrical length that is greater than 1/2 the wavelength corresponding to the antenna structure U operating at a minimum operating frequency in an operating frequency band, and the electrical length is less than or equal to that of the antenna structure U operating at the lowest operating frequency in the operating frequency band Corresponding wavelength "technical solution, or" feeding point F is electrically connected to the grounding point G through the electrostatic protection unit 4 to form a grounding path. The grounding path has an electrical length that is greater than the antenna structure U and operates at A technical solution in which a minimum operating frequency in a working frequency band corresponds to 1/4 times the wavelength and the electrical length is less than or equal to a half of the wavelength corresponding to the minimum operating frequency in the operating frequency band of the antenna structure U, And enhance the effect of electrostatic protection.

The contents disclosed above are only the preferred and feasible embodiments of the present invention, and therefore do not limit the scope of patent application of the present invention. Therefore, any equivalent technical changes made by using the description and drawings of the present invention are included in the application of the present invention Within the scope of the patent.

Claims (10)

An antenna structure includes: a first radiating element; a second radiating element; and a feeding element, which is electrically connected between the first radiating element and the second radiating element, and the feeding element has a feeding element. And a ground terminal, the feed terminal is electrically connected to the first radiator, the ground terminal is electrically connected to the second radiator, and the feed terminal is electrically connected to the first radiator at a feed And an electrostatic protection unit electrically connected between the first radiating element and the second radiating element, the electrostatic protection unit includes a transient voltage suppression element and a conductive element electrically connected to the transient voltage suppression element. The electrostatic protection unit is electrically connected to the second radiating element at a ground; wherein a ground path is formed between the feeding point and the ground through the electrostatic protection unit, the ground path has an electrical length, and The electrical length is greater than 1/2 the wavelength corresponding to the antenna structure operating at a minimum operating frequency in an operating frequency band, and the electrical length is less than or equal to that of the antenna structure operating at the minimum operating frequency in the operating frequency band Wavelength. The antenna structure according to claim 1, wherein the electrostatic protection unit is electrically connected to the first radiating element at a connection, and the distance from the feeding point to the connection is less than or equal to the operation of the antenna structure for the work 1/16 times the wavelength of the lowest operating frequency in the frequency band. The antenna structure according to claim 1, wherein a capacitance value of the transient voltage suppression element is greater than 0.5 pF. The antenna structure according to claim 1, wherein the first radiating member has a first radiating portion, a second radiating portion, and a feeding portion connected between the first radiating portion and the second radiating portion, The second radiating element has a third radiating portion, a fourth radiating portion, and a grounding portion connected between the third radiating portion and the fourth radiating portion; wherein the first radiating portion and the third radiating portion Both have a first operating frequency band, and the second and fourth radiating parts both have a second operating frequency band, and the center frequency of the first operating frequency band is higher than the center frequency of the second operating frequency band; The feeding end is electrically connected to the feeding portion of the first radiating element, the ground terminal is electrically connected to the ground portion of the second radiating element, and the feeding terminal is electrically connected to the feeding portion of the first radiating element. At the feed. The antenna structure according to claim 4, wherein the electrostatic protection unit is electrically connected between the first radiating portion of the first radiating element and the third radiating portion of the second radiating element, and the electrostatic protection unit The third radiating portion of the second radiating element is electrically connected to the ground. The antenna structure according to claim 4, wherein the electrostatic protection unit is electrically connected between the second radiating portion of the first radiating element and the fourth radiating portion of the second radiating element, and the electrostatic protection unit The fourth radiating portion of the second radiating element is electrically connected to the ground. An antenna structure includes: a radiating element; a grounding element; a feeding element electrically connected between the radiating element and the grounding element, the feeding element having a feeding end and a grounding end, the feeding element The input end is electrically connected to the radiation element, the ground end is electrically connected to the ground element, the input end is electrically connected to the radiation element at a feed point; and an electrostatic protection unit is electrically connected to the radiation element. The electrostatic protection unit includes a transient voltage suppression element and a conductive member electrically connected to the transient voltage suppression element, and the ground protection piece is electrically connected to the ground piece at a ground; and A ground path is formed between the feed point and the ground through the electrostatic protection unit, and the ground path has an electrical length that is greater than the antenna structure corresponding to a minimum operating frequency in a working frequency band. 1/4 times the wavelength, and the electrical length is less than or equal to 1/2 times the wavelength when the antenna structure is operated at the lowest operating frequency in the operating frequency band. The antenna structure according to claim 7, wherein the electrical connection between the electrostatic protection unit and the radiating member is a connection, and the distance from the feed point to the connection is less than or equal to the operation of the antenna structure 1/16 times the wavelength corresponding to the lowest operating frequency in the operating frequency band. The antenna structure according to claim 7, wherein a capacitance value of the transient voltage suppression element is greater than 0.5 pF. The antenna structure according to claim 7, wherein the radiating member has a first radiating portion, a second radiating portion, and a feeding portion connected between the first radiating portion and the second radiating portion; wherein, The first radiating part has a first operating frequency band, and the second radiating part has a second operating frequency band. The center frequency of the first operating frequency band is higher than the center frequency of the second operating frequency band. The feed portion is electrically connected to the feed portion of the radiating element, and the feed end is electrically connected to the feed portion of the radiating element at the feed point.