Antenna structure and electronic device

Abstract

The invention discloses an antenna structure and an electronic device. The antenna structure is arranged on a carrier of the electronic device; the antenna structure comprises a first dipole radiation part, a second dipole radiation part and a third dipole radiation part. The first dipole radiation part is perpendicular to a plane; the second dipole radiation part is connected to the first dipole radiation part; the third dipole radiation part is connected to the first dipole radiation part and the second dipole radiation part; the first dipole radiation part is used for generating a first radiation field pattern, the second dipole radiation part is used for generating a second radiation field pattern, and the third dipole radiation part is used for generating a third radiation field pattern; the first radiation field pattern is omnidirectional radiation on a plane; the polarization direction of the second radiation pattern is orthogonal to the polarization direction of the first radiation pattern, and the polarization direction of the third radiation pattern is orthogonal to the polarization direction of the first radiation pattern. According to the antenna structure and the electronic device provided by the invention, the first radiation field pattern generated by the first dipole radiation part cannot be influenced by the other two dipole radiation parts, and the omnidirectional radiation characteristic can be maintained.

Description

Technical Field

[0001] The present invention relates to an antenna structure and an electronic device, and in particular to an antenna structure and an electronic device capable of generating an omnidirectional radiation field in a specific frequency band. Background Art

[0002] Electronic products, such as network sharers, routers, and micro base stations, communicate with the outside world through built-in antennas. Built-in antennas refer to antennas embedded in electronic products. Generally speaking, implanting antennas into products during the design process can make the products more beautiful and convenient to use. However, the signal strength and stability of the antenna may be limited by the internal space of the product itself. For example, when the outer shell of the product is made of metal, the clearance area of ​​the antenna will be reduced, which will reduce the space inside the product where the antenna can be installed, thereby affecting the radiation efficiency of the antenna.

[0003] Therefore, how to overcome the above-mentioned defects through improvement of structural design has become one of the important issues to be solved in this field.

[0004] Therefore, it is necessary to provide an antenna structure and an electronic device to solve the above problems. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an antenna structure and an electronic device to solve the technical problem that the built-in antenna of an electronic product is easily restricted by a metal environment and a limited space, thereby affecting the antenna performance.

[0006] In order to solve the above-mentioned technical problems, one of the technical solutions adopted by the present invention is to provide an antenna structure, which includes a first dipole radiator, a second dipole radiator and a third dipole radiator. The first dipole radiator is perpendicular to a plane. The second dipole radiator is connected to the first dipole radiator. The third dipole radiator is connected to the first dipole radiator and the second dipole radiator. The first dipole radiator is used to generate a first radiation pattern, the second dipole radiator is used to generate a second radiation pattern, and the third dipole radiator is used to generate a third radiation pattern. The first radiation pattern is omnidirectional radiation on a plane. The polarization direction of the second radiation pattern is orthogonal to the polarization direction of the first radiation pattern, and the polarization direction of the third radiation pattern is orthogonal to the polarization direction of the first radiation pattern.

[0007] In order to solve the above-mentioned technical problems, another technical solution adopted by the present invention is to provide an electronic device, which includes a carrier and an antenna structure. The antenna structure is arranged on the carrier. The antenna structure includes a first dipole radiator, a second dipole radiator and a third dipole radiator. The first dipole radiator is perpendicular to a plane. The second dipole radiator is connected to the first dipole radiator. The third dipole radiator is connected to the first dipole radiator and the second dipole radiator. The first dipole radiator is used to generate a first radiation pattern, the second dipole radiator is used to generate a second radiation pattern, and the third dipole radiator is used to generate a third radiation pattern. The first radiation pattern is omnidirectional radiation on a plane. The polarization direction of the second radiation pattern is orthogonal to the polarization direction of the first radiation pattern, and the polarization direction of the third radiation pattern is orthogonal to the polarization direction of the first radiation pattern.

[0008] One of the beneficial effects of the present invention is that the antenna structure and the electronic device provided by the present invention can be connected to each other through the first dipole radiator, the second dipole radiator and the third dipole radiator, and the first dipole radiator generates an omnidirectional first radiation pattern, and the second radiation pattern and the third radiation pattern generated by the second dipole radiator and the third dipole radiator are orthogonal to the first radiation pattern. In this way, the first radiation pattern generated by the first dipole radiator will not be affected by the other two dipole radiators, and can maintain the omnidirectional radiation characteristics.

[0009] 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 description and are not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a three-dimensional schematic diagram of the electronic device of the present invention.

[0011] Figure 2 It is a partial exploded view of the electronic device of the present invention.

[0012] Figure 3 It is a plan view of the antenna structure of the present invention.

[0013] Figure 4 It is a schematic diagram of the radiation pattern of the antenna structure of the present invention in the XY plane when the operating frequency is 3700 MHz. Figure 5 It is a schematic diagram of the radiation pattern of the antenna structure of the present invention in the XY plane when the operating frequency is 4000 MHz.

[0014] Main component symbols:

[0015] D Electronic Devices

[0016] S carrier

[0017] S1 First plate

[0018] S2 Second plate

[0019] S3 Third plate

[0020] M1, M2 antenna structure

[0021] 1 First dipole radiator

[0022] 11, 12 First radiating unit

[0023] 2 Second dipole radiator

[0024] 21, 22 Second radiation unit

[0025] 3 Third dipole radiator

[0026] 31, 32 The third radiation unit

[0027] 4 Feedthrough

[0028] 41 Feeding section

[0029] 42 Grounding

[0030] 5 Coupling elements

[0031] CP1 First connection point

[0032] CP2 Second connection point

[0033] T substrate

[0034] T1 Part 1

[0035] T2 Part 2

[0036] L Inductor

[0037] H, H1, H2 segments DETAILED DESCRIPTION

[0038] The following is a specific embodiment to illustrate the implementation of the "antenna structure and electronic device" disclosed in the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and the details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are only simple schematic illustrations, not depictions based on actual dimensions, and it is stated in advance. The following implementations will further explain the relevant technical content of the present invention in detail, but the disclosed content is not intended to limit the scope of protection of the present invention. In addition, it should be understood that although the terms "first", "second", "third" and the like may be used in this article to describe various elements, these elements should not be limited by these terms. These terms are mainly used to distinguish one element from another. In addition, the term "or" used in this article should include any one or more combinations of the associated listed items depending on the actual situation. In addition, the term “connect” in the present invention means that there is a physical connection between two elements and it can be a direct connection or an indirect connection, and the term “couple” in the present invention means that two elements are separated from each other and have no physical connection, but the electric field energy generated by the current of one element excites the electric field energy of another element.

[0039] [Example]

[0040] See also Figure 1 and Figure 2 As shown, Figure 1 is a three-dimensional schematic diagram of the electronic device of the present invention, Figure 2 It is a partial exploded view of the electronic device of the present invention. The present invention provides an electronic device D. For example, the electronic device D can be a network sharer, a router or a micro base station, but the present invention is not limited thereto. The electronic device D includes a housing (not shown in the figure), a carrier S and at least one antenna structure disposed on the carrier S. The carrier S and the at least one antenna structure are disposed inside the housing. For the convenience of description and illustration, the housing is omitted in the drawings of the present invention. The carrier S can be a supporting bracket, which can be used to carry at least one antenna structure and other electronic components (not shown in the figure). The carrier S includes a first plate S1, a second plate S2 and a third plate S3. The first plate S1 is vertically connected between the second plate S2 and the third plate S3, and the second plate S2 and the third plate S3 are parallel to each other. Further, the surface of the first plate S1 is parallel to the YZ plane, and the surfaces of the second plate S2 and the third plate S3 are parallel to the XZ plane. However, the present invention is not limited to the specific shape of the carrier S.

[0041] It should also be noted that the present invention is not limited to the number of antenna structures. For example, in the present invention, the electronic device D includes two antenna structures M1 and M2. A portion of the antenna structure M1 is disposed on the first plate S1 and another portion is disposed on the second plate S2. A portion of the antenna structure M2 is disposed on the first plate S1 and another portion is disposed on the third plate S3. The structural shapes of the two antenna structures M1 and M2 are basically the same, so in the embodiments described below, only the antenna structure M1 is used as an example, and the antenna structure M2 is not described in detail.

[0042] The antenna structure M1 includes a substrate T and a plurality of radiators disposed on the substrate T. The substrate T may be an FR4 substrate, a printed circuit board, or a flexible printed circuit board (FPCB), but the present invention is not limited thereto. Specifically, the antenna structure M1 includes a first dipole radiator 1, a second dipole radiator 2, and a third dipole radiator 3. The second dipole radiator 2 is connected to the first dipole radiator 1, and the third dipole radiator 3 is connected to the first dipole radiator 1 and the second dipole radiator 2. The first dipole radiator 1, the second dipole radiator 2, and the third dipole radiator 3 may be metal sheets, metal patterns, or other conductive bodies having a conductive effect.

[0043] The substrate T includes a first substrate T1 and a second substrate T2. The first substrate T1 is disposed on the second plate S2, and the second substrate T2 is disposed on the first plate S1. The first dipole radiator 1 is disposed on the first substrate T1. In other words, the first dipole radiator 1 is perpendicular to the XY plane. However, in other embodiments, the first dipole radiator 1 may also be perpendicular to other planes, such as the YZ plane or the XZ plane, and the present invention is not limited thereto. The configuration of the second dipole radiator 2 and the third dipole radiator 3 changes with the different configuration directions of the first dipole radiator 1.

[0044] See also Figure 2 and Figure 3 As shown, Figure 3It is a schematic plan view of the antenna structure M1 of the present invention. The first dipole radiator 1 includes two first radiating units 11 and 12 that are not in contact with each other, and the first radiating units 11 and 12 are both disposed on the first substrate T1. The second dipole radiator 2 includes two second radiating units 21 and 22 that are not in contact with each other, wherein one second radiating unit 21 is disposed on the first substrate T1, and the other second radiating unit 22 is disposed on the second substrate T2. The third dipole radiator 3 includes two third radiating units 31 and 32 that are not in contact with each other, wherein one third radiating unit 31 is disposed on the first substrate T1, and the other third radiating unit 32 is disposed on the second substrate T2. The first radiating unit 11, the second radiating unit 21, and the third radiating unit 31 intersect at a first connection point CP1, and the first radiating unit 12, the second radiating unit 22, and the third radiating unit 32 intersect at a second connection point CP2. In addition, since the space available for placing the antenna structure M1 inside the electronic device D is limited, when the antenna structure M1 is set inside the electronic device D2, the extension of the radiation unit may be restricted by other mechanisms. Therefore, in terms of structural design, the shapes of the two first radiation units 11 and 12 are symmetrical to each other, the shapes of the two second radiation units 21 and 22 are asymmetrical, and the shapes of the two third radiation units 31 and 32 are asymmetrical.

[0045] like Figure 2 and Figure 3 As shown, the antenna structure M1 also includes a feeding element 4, which is electrically connected to the first dipole radiator 1, the second dipole radiator 2 and the third dipole radiator 3. For example, the feeding element 4 is a coaxial cable. Further, the feeding element 4 includes a feeding portion 41 and a grounding portion 42, the feeding portion 41 is electrically connected to the first connection point CP1, and the grounding portion 42 is electrically connected to the second connection point CP2. The feeding element 4 feeds a signal to the first connection point CP1 through the feeding portion 41, so that the first dipole radiator 1 is used to generate a first operating frequency band, the second dipole radiator 2 is used to generate a second operating frequency band, and the third dipole radiator 3 is used to generate a third operating frequency band. The first operating frequency band to the third operating frequency band can cover the full LTE frequency band and the 5G NR frequency band. For example, the first dipole radiator 1 is used to generate a first operating frequency band including 5G NR n77 and LTE band 48, the second dipole radiator 2 is used to generate a second operating frequency band including LTE band 2 and LTE band 66, and the third dipole radiator 3 is used to generate a third operating frequency band including LTE band 5 and LTE band 13. However, the present invention is not limited to the specific frequency range generated by the first operating frequency band to the third operating frequency band. The first operating frequency band is higher than the second operating frequency band, and the second operating frequency band is higher than the third operating frequency band.

[0046] Furthermore, the first dipole radiator 1 generates a first radiation pattern in a high frequency range (i.e., a first operating frequency band), the second dipole radiator 2 generates a second radiation pattern in a medium frequency range (i.e., a second operating frequency band), and the third dipole radiator 3 generates a third radiation pattern in a low frequency range (i.e., a third operating frequency band). For example, when the electronic device D of the present invention is placed on a horizontal table, Figure 1 The XY plane of the first dipole radiator 1 is parallel to the horizontal plane, that is, the first dipole radiator 1 is perpendicular to the XY plane (that is, the horizontal plane). In the present invention, the first radiation pattern generated by the first dipole radiator 1 is omnidirectional radiation in the XY plane, that is, the radiation pattern generated by the first dipole radiator 1 is a uniform radiation pattern showing 360° in the horizontal direction. In addition, the polarization direction of the second radiation pattern generated by the second dipole radiator 2 is orthogonal to the polarization direction of the first radiation pattern, and the polarization direction of the third radiation pattern generated by the third dipole radiator 3 is orthogonal to the polarization direction of the first radiation pattern.

[0047] See also Figure 4 and Figure 5 As shown, Figure 4 is a schematic diagram of the radiation pattern of the antenna structure of the present invention in the XY plane when the operating frequency is 3700 MHz, Figure 5 FIG. 1 is a schematic diagram of the radiation pattern of the antenna structure of the present invention in the XY plane when the operating frequency is 4000 MHz. Figure 4 and Figure 5 It can be seen that the first radiation pattern generated by the first dipole radiator 1 in the high frequency range using the vertical polarization design can present omnidirectional radiation in the XY plane, and the radiation gain of the first radiation pattern in the XY plane is greater than -10dB. More specifically, the radiation gain of the first radiation pattern at the null point position of the XY plane is greater than -10dB, and the null point is defined as the area with the minimum radiation power in the radiation pattern. That is, the first dipole radiator 1 can maintain a certain radiation efficiency while showing omnidirectional radiation in the XY plane. In other words, the present invention first uses the first dipole radiator 1 to generate the first radiation pattern in the high frequency range using the vertical polarization design to present omnidirectional radiation in the XY plane, and then uses the structural design of the second dipole radiator 2 and the third dipole radiator 3 to make the second radiation pattern and the third radiation pattern orthogonally polarized with the first radiation pattern, thereby, the first radiation pattern generated by the first dipole radiator 1 will not be affected by the second dipole radiator 2 and the third dipole radiator 3, and still retains the omnidirectional radiation characteristics.

[0048] It should be noted that the antenna structure provided by the present invention is not limited to the design in which the first dipole radiator 1 is a high-frequency antenna, the second dipole radiator 2 is a medium-frequency antenna, and the third dipole radiator 3 is a low-frequency antenna. For example, in another embodiment, the first dipole radiator 1 can be a high-frequency antenna, the second dipole radiator 2 can be a low-frequency antenna, and the third dipole radiator 3 can be a medium-frequency antenna. In other words, as long as the antenna structure meets the requirements that one of the radiators is designed with vertical polarization perpendicular to a plane, and the other two radiators are designed with orthogonal polarization, the radiation patterns generated by each of them are not affected by each other.

[0049] Continue reading Figure 3 The shapes of the two first radiation units 11 of the first dipole radiation element 1 are symmetrical to each other, the shapes of the two second radiation units 21 and 22 of the second dipole radiation element 2 are asymmetrical, and the shapes of the two third radiation units 31 and 32 of the third dipole radiation element 3 are asymmetrical. In addition, the antenna structure M1 also includes two coupling elements 5. One coupling element 5 is connected between the second radiation unit 21 and the corresponding third radiation unit 31, and the other coupling element 5 is connected between the second radiation unit 22 and the corresponding third radiation unit 32. Through the structural design of the coupling element 5, the antenna structure M1 can further improve the bandwidth and radiation efficiency in the low-frequency and medium-frequency ranges.

[0050] The antenna structure M1 further includes two inductance elements L, which are connected in series to the two third radiation units 31 and 32 respectively. Each inductance element L is designed to be arranged on a corresponding low-frequency trace. The distance between each inductance element L and the corresponding connection point is exactly 1 / 4 of the high-frequency wavelength, which is also equal to the length of each first radiation unit 11 and 12. Figure 3 As shown, the third radiation unit 31 is used to connect one of the inductance elements L and the first connection point CP1. Figure 1 The length of the middle section H) is 1 / 4 wavelength of the first operating frequency band. Similarly, the length of the section ( Figure 1 The sum of the lengths of the middle section H1 and the section H2 is 1 / 4 wavelength of the first operating frequency band. The inductance value of each inductor element L is 5.1nH. When a high-frequency current passes through the position of the inductor element L of the third radiation unit 31, 32, the inductor element L forms an open circuit state; when a low-frequency current passes through the position of the inductor element L of the third radiation unit 31, 32, the inductor element L forms a short circuit state. Through the characteristics of the inductor element L, the interference generated by the low-frequency antenna (the third dipole radiation element 3) can be suppressed to ensure that the radiation pattern of the high-frequency antenna (the first dipole radiation element 1) will not be affected by the low-frequency antenna (the third dipole radiation element 3), thereby further optimizing the high-frequency radiation pattern (i.e., the first radiation pattern).

[0051] [Beneficial Effects of Embodiments]

[0052] One of the beneficial effects of the present invention is that the antenna structure and the electronic device provided by the present invention can be connected to each other through the first dipole radiator, the second dipole radiator and the third dipole radiator, and the first dipole radiator generates an omnidirectional first radiation pattern, and the second radiation pattern and the third radiation pattern generated by the second dipole radiator and the third dipole radiator are orthogonal to the first radiation pattern. In this way, the first radiation pattern generated by the first dipole radiator will not be affected by the other two dipole radiators, and can maintain the omnidirectional radiation characteristics.

[0053] Furthermore, in the prior art, the antenna may be limited by the internal space of the product itself and affect its performance. The present invention first uses the first dipole radiator 1 to generate a first radiation pattern in the high frequency range with a vertical polarization design to be able to present omnidirectional radiation in the XY plane, and then uses the structural design of the second dipole radiator 2 and the third dipole radiator 3 to make the second radiation pattern and the third radiation pattern orthogonal to the first radiation pattern. In this way, the first radiation pattern generated by the first dipole radiator 1 will not be affected by the second dipole radiator 2 and the third dipole radiator 3, and still retains the omnidirectional radiation characteristics.

[0054] Furthermore, the antenna structure M1 also utilizes two inductance elements L connected in series to the two third radiation units 31 and 32 respectively. Each inductance element L is designed to be arranged on a corresponding low-frequency path (trace). The distance between each inductance element L and the corresponding connection point is exactly 1 / 4 of the high-frequency wavelength. Through the characteristics of the inductance element L, the interference generated by the low-frequency antenna (third dipole radiator 3) can be suppressed, ensuring that the radiation pattern of the high-frequency antenna (first dipole radiator 1) will not be affected by the low-frequency antenna (third dipole radiator 3), and further optimizing the high-frequency radiation pattern (i.e., the first radiation pattern).

[0055] The contents disclosed above are only preferred feasible embodiments of the present invention, and are not intended to limit the scope of the claims of the present invention. Therefore, all equivalent technical changes made using the contents of the present invention description and drawings are included in the scope of the claims of the present invention.

Claims

1. An antenna structure, comprising: a first dipole radiating element, the first dipole radiating element being perpendicular to a plane; a second dipole radiating element, the second dipole radiating element connected to the first dipole radiating element; as well as a third dipole radiating element, the third dipole radiating element being connected to the first dipole radiating element and the second dipole radiating element; Among them, the first dipole radiator is used to generate a first radiation field pattern, the second dipole radiator is used to generate a second radiation field pattern, and the third dipole radiator is used to generate a third radiation field pattern. The first radiation field pattern is omnidirectional radiation on the plane, the polarization direction of the second radiation field pattern is orthogonal to the polarization direction of the first radiation field pattern, and the polarization direction of the third radiation field pattern is orthogonal to the polarization direction of the first radiation field pattern.

2. The antenna structure according to claim 1, wherein: The radiation gain of the first radiation pattern on the plane is greater than -10 dB.

3. The antenna structure according to claim 1, wherein: The first dipole radiator, the second dipole radiator and the third dipole radiator generate a first operating frequency band, a second operating frequency band and a third operating frequency band respectively. The first operating frequency band is higher than the second operating frequency band, and the second operating frequency band is higher than the third operating frequency band.

4. The antenna structure according to claim 3, wherein: The first dipole radiator includes two first radiating units, the second dipole radiator includes two second radiating units, and the third dipole radiator includes two third radiating units, wherein one of the first radiating units, one of the second radiating units, and one of the third radiating units intersect at a first connection point, and another of the first radiating unit, another of the second radiating unit, and another of the third radiating units intersect at a second connection point.

5. The antenna structure as described in claim 4 further includes a feeding element electrically connected to the first dipole radiating element, the second dipole radiating element and the third dipole radiating element, the feeding element includes a feeding portion and a grounding portion, the feeding portion is electrically connected to the first connection point, and the grounding portion is electrically connected to the second connection point.

6. The antenna structure according to claim 4, wherein: The shapes of the two first radiation units are symmetrical to each other, the shapes of the two second radiation units are asymmetrical, and the shapes of the two third radiation units are asymmetrical. 7 . The antenna structure as claimed in claim 4 , further comprising two coupling elements, each of the coupling elements being connected between one of the second radiation units and the corresponding third radiation unit. 8 . The antenna structure as claimed in claim 4 , further comprising a first inductor element and a second inductor element, respectively connected in series to the two third radiation units.

9. The antenna structure according to claim 8, wherein: The length of a section of one of the third radiation units used to connect the first inductance element and the first connection point is 1 / 4 wavelength of the first operating frequency band, and the length of a section of another third radiation unit used to connect the second inductance element and the second connection point is 1 / 4 wavelength of the first operating frequency band.

10. The antenna structure according to claim 8, wherein: The inductance values ​​of the first inductor element and the second inductor element are both 5.1 nH.

11. An electronic device, comprising: A carrier; as well as An antenna structure, the antenna structure is arranged on the carrier, and the antenna structure comprises: a first dipole radiator, the first dipole radiator being perpendicular to a plane; a second dipole radiating element, the second dipole radiating element connected to the first dipole radiating element; and a third dipole radiating element, the third dipole radiating element being connected to the first dipole radiating element and the second dipole radiating element; Among them, the first dipole radiator is used to generate a first radiation field pattern, the second dipole radiator is used to generate a second radiation field pattern, and the third radiation field pattern is used to generate a third radiation field pattern. The first radiation field pattern is omnidirectional radiation on the plane, the polarization direction of the second radiation field pattern is orthogonal to the polarization direction of the first radiation field pattern, and the polarization direction of the third radiation field pattern is orthogonal to the polarization direction of the first radiation field pattern.

12. The electronic device according to claim 11, wherein: The radiation gain of the first radiation pattern on the plane is greater than -10 dB.

13. The electronic device according to claim 11, wherein: The first dipole radiator, the second dipole radiator and the third dipole radiator generate a first operating frequency band, a second operating frequency band and a third operating frequency band respectively. The first operating frequency band is higher than the second operating frequency band, and the second operating frequency band is higher than the third operating frequency band.

14. The electronic device as claimed in claim 13, wherein: The first dipole radiator includes two first radiating units, the second dipole radiator includes two second radiating units, and the third dipole radiator includes two third radiating units, wherein one of the first radiating units, one of the second radiating units, and one of the third radiating units intersect at a first connection point, and another of the first radiating unit, another of the second radiating unit, and another of the third radiating units intersect at a second connection point.

15. The electronic device as described in claim 14 further comprises a feeding element electrically connected to the first dipole radiating element, the second dipole radiating element and the third dipole radiating element, the feeding element comprises a feeding portion and a grounding portion, the feeding portion is electrically connected to the first connection point, and the grounding portion is electrically connected to the second connection point.

16. The electronic device according to claim 14, wherein: The shapes of the two first radiation units are symmetrical to each other, the shapes of the two second radiation units are asymmetrical, and the shapes of the two third radiation units are asymmetrical.

17. The electronic device as claimed in claim 14, wherein: The antenna structure further includes two coupling elements, each of which is connected between one of the second radiation units and the corresponding third radiation unit.

18. The electronic device according to claim 14, wherein: The antenna structure also includes two inductance elements, which are respectively connected in series to the two third radiation units.

19. The electronic device as claimed in claim 18, wherein: The length of a section of each of the third radiation units for connecting the inductor element and the first connection point or the second connection point is 1 / 4 wavelength of the first operating frequency band.

20. The electronic device of claim 18, wherein: The inductance of each of the inductor elements is 5.1 nH.

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