Electronic device and antenna module

Abstract

An electronic device and an antenna module are provided. The electronic device comprises a shell and an antenna module. The antenna module is arranged in the shell; the antenna module comprises a first radiation part, a switching circuit, a proximity sensing circuit, a second radiation part and a third radiation part. The first radiation part comprises a feed-in part, a radiation part and a grounding part; the feed-in part and the grounding part are connected to the radiation part; the second radiation part is electrically connected to the switching circuit; the second radiation part and the radiation part are separated from each other and are coupled with each other; the third radiation element is electrically connected to the proximity sensing circuit, the third radiation element and the second radiation element are separated from each other, and the third radiation element and the radiation part are separated from each other and coupled to each other. According to the electronic device and the antenna module provided by the invention, the proximity sensing circuit can have a better sensing distance; in addition, the third radiation part can optimize antenna characteristics, and can generate low-frequency dual modes with the second radiation part, thereby achieving wider-frequency operation.

Description

Technical Field

[0001] The present invention relates to an electronic device and an antenna module, and in particular to an electronic device and an antenna module capable of increasing the sensing distance of a proximity sensing circuit and optimizing antenna characteristics. Background Art

[0002] Existing electronic products, such as notebook computers and tablet computers, have a design trend towards a thin and light appearance, so the size of the antenna structure inside the electronic product is limited to the internal space of the electronic product. In addition, when the antenna structure inside the electronic product is used with a proximity sensing circuit, the radiator in the antenna structure is usually used as a sensing electrode. However, the radiator as a sensing electrode is limited by the design of the antenna structure itself, resulting in an insufficient sensing distance of the proximity sensing circuit.

[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 electronic device and an antenna module to solve the above problems. Summary of the invention

[0005] The present invention provides an electronic device and an antenna module to solve the problem that the proximity sensing circuit used with the antenna structure in the prior art has an insufficient sensing distance.

[0006] In order to solve the above-mentioned technical problems, one of the technical solutions adopted by the present invention is to provide an electronic device, which includes a shell and an antenna module. The antenna module is arranged in the shell. The antenna module includes a first radiating element, a switching circuit, a proximity sensing circuit, a second radiating element and a third radiating element. The first radiating element includes a feeding portion, a radiating portion and a grounding portion. The feeding portion and the grounding portion are connected to the radiating portion. The second radiating element is electrically connected to the switching circuit, and the second radiating element and the first radiating portion are separated from each other and coupled to each other. The third radiating element is electrically connected to the proximity sensing circuit, and the third radiating element and the second radiating element are separated from each other, and the third radiating element and the first radiating portion are separated from each other and coupled to each other.

[0007] In order to solve the above-mentioned technical problems, another technical solution adopted by the present invention is to provide an antenna module, which includes a first radiating element, a switching circuit, a proximity sensing circuit, a second radiating element and a third radiating element. The first radiating element includes a feeding portion, a radiating portion and a grounding portion. The feeding portion and the grounding portion are connected to the radiating portion. The second radiating element is electrically connected to the switching circuit, and the second radiating element and the first radiating portion are separated from each other and coupled to each other. The third radiating element is electrically connected to the proximity sensing circuit, and the third radiating element and the second radiating element are separated from each other, and the third radiating element and the first radiating portion are separated from each other and coupled to each other.

[0008] One of the beneficial effects of the present invention is that the electronic device and antenna module provided by the present invention can use the technical solution of "the third radiator is electrically connected to the proximity sensing circuit, the third radiator is separated from the second radiator, and the third radiator is separated from the first radiating part and coupled to each other" to make the proximity sensing circuit of the antenna module be equipped with an independent radiator (i.e., the third radiator). Thereby, the proximity sensing circuit can have a better sensing distance. In addition, the third radiator can also optimize the antenna characteristics, and can also generate a low-frequency dual mode with the second radiator to achieve a wider bandwidth operation.

[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 is a schematic diagram of an electronic device of the present invention.

[0011] Figure 2 is a schematic diagram of an antenna module of the present invention.

[0012] Figure 3 for Figure 2 An enlarged schematic diagram of part III.

[0013] Figure 4 It is a first stereoscopic schematic diagram of the antenna module of the present invention.

[0014] Figure 5 It is a second stereoscopic schematic diagram of the antenna module of the present invention.

[0015] Figure 6 It is a schematic diagram of a reflection loss curve of the antenna module of the present invention.

[0016] Figure 7 It is a schematic diagram of the gain curve of the antenna module of the present invention in the low frequency range.

[0017] Figure 8 It is a schematic diagram of the gain curve of the antenna module of the present invention in the high frequency range.

[0018] Main component symbols:

[0019] D Electronic Devices

[0020] T housing

[0021] M Antenna module

[0022] 1 First radiator

[0023] 11 Feeding section

[0024] 111 Section 3

[0025] 12 Radiation

[0026] 12A First extension

[0027] 12B Second extension

[0028] 121 First Segment

[0029] 122 Second Section

[0030] 13 Grounding

[0031] 2 Second radiator

[0032] 3 The third radiator

[0033] 30 Connection

[0034] 31 First widening section

[0035] 311 First side

[0036] 312 Second side

[0037] 32 Second widening section

[0038] 321 Third side

[0039] 322 Fourth side

[0040] 4 Switching Circuit

[0041] 41 First Path

[0042] 42 Second Path

[0043] 5 Proximity sensing circuit

[0044] SW1 First switch

[0045] SW2 Second switch

[0046] P1 First passive component

[0047] P2 Second passive component

[0048] L Inductor

[0049] CG1 First coupling gap

[0050] CG2 Second coupling gap

[0051] SB residual tape

[0052] E1 start end

[0053] E2 Open end

[0054] F Feedthrough

[0055] F1 Ground terminal

[0056] F2 signal terminal

[0057] C Control Circuit

[0058] G Grounding piece

[0059] H Path length

[0060] S Carrier Board

[0061] S1 First Surface

[0062] S2 Second Surface

[0063] S3 Third Surface

[0064] S4 Fourth Surface DETAILED DESCRIPTION

[0065] The following is a specific embodiment to illustrate the implementation of the "electronic device and antenna module" 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 sizes, 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.

[0066] [Example]

[0067] See also Figure 1 As shown, Figure 1Schematic diagram of an electronic device of the present invention. The present invention provides an electronic device D, which includes a housing T and an antenna module M disposed in the housing T. The electronic device D may be a smart phone, a tablet computer, or a notebook computer, but the present invention is not limited thereto. The present invention takes the electronic device D as an example of a notebook computer. At least a portion of the housing T may be a metal housing. In addition, the present invention is not limited to the number and position of the antenna module M in the electronic device D.

[0068] See also Figure 2 and Figure 3 As shown, Figure 2 is a schematic diagram of an antenna module of the present invention, Figure 3 for Figure 2 The present invention provides an antenna module M, which includes a first radiating element 1, a second radiating element 2, a third radiating element 3, a switching circuit 4 and a proximity sensing circuit 5.

[0069] The first radiating element 1 includes a feeding portion 11, a radiating portion 12 and a grounding portion 13. The feeding portion 11 and the grounding portion 13 are connected to the radiating portion 12. The feeding portion 11 is connected to a feeding element F. Thus, the first radiating element 1 forms a planar inverted-F antenna (PIFA). The feeding element F can feed a signal to the first radiating element 1 through the feeding portion 11, so that the antenna module M generates at least one operating frequency band.

[0070] The second radiating element 2 and the radiating portion 12 are separated from each other and coupled to each other to generate an operating frequency band with a frequency range of 750 MHz to 960 MHz. The second radiating element 2 is electrically connected to the switching circuit 4. The switching circuit 4 may include one or more signal transmission paths, which is not limited by the present invention. For example, the switching circuit 4 may include a first path 41, and the first path 41 has a first switching switch SW1 and a first passive component P1. Further, the switching circuit 4 may also include a second path 42, and the second path 42 includes a second switching switch SW2 and a second passive component P2. The switching circuit 4 is used to switch to a first mode and a second mode according to the switching states of the first switching switch SW1 and the second switching switch SW2, and the equivalent impedance generated by the switching circuit 4 in the first mode is different from the equivalent impedance generated by the switching circuit 4 in the second mode.

[0071] The third radiating element 3 is electrically connected to the proximity sensing circuit 5, and the third radiating element 3 is separated from the second radiating element 2. The third radiating element 3 is a floating arm that is not grounded, and the third radiating element 3 and the radiating portion 12 are separated from each other and coupled to each other to generate an operating frequency band ranging from 617 MHz to 800 MHz. The antenna module M further includes an inductor element L, which is electrically connected between the third radiating element 3 and the proximity sensing circuit 5.

[0072] The electronic device D may further include a control circuit C. The control circuit C may control the conduction state of the switch of the switching circuit 4, so that the switching circuit 4 switches to one of the multiple modes, so as to adjust the operating frequency band of the antenna module M, so that the antenna module M can cover a wider frequency range at low frequency. Further, the present invention can generate low-frequency dual modes (617MHz to 800MHz and 750MHz to 960MHz) through the design of the second radiating element 2 and the third radiating element 3, and further cover the low frequency range of 617MHz to 960MHz through the operation of the switching circuit 4.

[0073] In addition, for example, the proximity sensing circuit 5 is a capacitance sensing circuit. The third radiating element 3 can be regarded as a sensing electrode (sensor electrode) for the proximity sensing circuit 5 to measure the capacitance value. The antenna module M of the present invention can increase the sensing distance of the proximity sensing circuit 5 by combining the proximity sensing circuit 5 with an independent radiating element (i.e., the third radiating element 3). Therefore, the control circuit C can determine whether a part of the user's body is located within a predetermined detection range adjacent to the antenna module M by the change in capacitance sensed by the proximity sensing circuit 5. It should also be noted that in the present invention, the proximity sensing circuit 5 is integrated inside the switching circuit 4, but the present invention is not limited thereto. In other embodiments, the proximity sensing circuit 5 can also be arranged outside the switching circuit 4.

[0074] like Figure 2 As shown, the radiation portion 12 includes a first extension section 12A and a second extension section 12B, the first extension section 12A extends relative to the feeding portion 11 along a direction toward the second radiation element 2, and the second extension section 12B extends relative to the feeding portion 11 along a direction away from the second radiation element 2. The first extension section 12A is used to be excited to generate an operating frequency band of 1710 MHz to 2300 MHz, and the second extension section 12B is used to be excited to generate an operating frequency band of 2300 MHz to 2700 MHz.

[0075] The radiation portion 12 further has a first section 121, and the first section 121 is located between the feeding portion 11 and the ground portion 13. A first coupling gap CG1 is provided between the first section 121 and the third radiation element 3, and the first coupling gap CG1 is less than or equal to 7 mm. Therefore, the first section 121 can be excited to generate an operating frequency band of 3800 MHz to 5000 MHz, and the matching effect is further optimized by the design of the first coupling gap CG1.

[0076] like Figure 2 and Figure 3 As shown, the radiation part 12 also has a second section 122, and the feeding part 11 is located between the first section 121 and the second section 122. The second section 122 is used to be excited to generate an operating frequency band of 3000MHz to 3800MHz. A portion of the third radiation element 3 crosses the second section 122 to form a residual band SB. It should be noted that in the present invention, the first radiation element 1, the second radiation element 2 and the third radiation element 3 are not necessarily located in the same plane (for example, Figure 4 and Figure 5 carrier S), therefore, a portion of the third radiating element 3 spanning the second section 122 does not mean that a portion of the third radiating element 3 is connected to the second section 122, but means that a portion of the third radiating element 3 projected onto the plane where the second section 122 is located will partially overlap with the second section 122.

[0077] like Figure 3 As shown, the residual band SB has a starting end E1 and an open end E2, the starting end E1 coincides with the edge of the second section 122, and the residual band SB has a path length H from the starting end E1 to the open end E2. Specifically, the path length H is the length from the midpoint of the starting end E1 to the midpoint of the open end E2. In addition, the path length H is equal to 1 / 4 wavelength of the operating frequency band (3000MHz to 3800MHz) generated by the second section 122. Through the design of the residual band SB, the impedance matching of the third radiation element 3 coupled to the first section 121 and the second section 122 can be adjusted to achieve a better matching effect.

[0078] The third radiating element 3 includes a first widening portion 31 and a second widening portion 32, the first widening portion 31 and the second widening portion 32 are respectively located on both sides of the grounding portion 13, and the second widening portion 32 is a part of the residual band SB. The first widening portion 31 has a first side 311 and a second side 312 opposite to each other, and the second widening portion 32 has a third side 321 and a fourth side 322 opposite to each other. The first widening portion 31 has a first preset width, which is the distance between the first side 311 and the second side 312. The second widening portion 32 has a second preset width, which is the distance between the third side 321 and the fourth side 322. Preferably, the first preset width and the second preset width are both at least greater than 3 mm. The present invention further increases the sensing distance of the proximity sensing circuit 5 on both sides of the antenna module M through the design of the first widening portion 31 and the second widening portion 32, thereby improving the sensitivity of sensing the surrounding capacitance change.

[0079] It should be noted that the first widened portion 31 and the second widened portion 32 are respectively located at the edge regions on both sides of the antenna module M. Figure 4 and Figure 5 As shown, if the antenna module M is disposed on the carrier S, the first widened portion 31 and the second widened portion 32 are respectively located on two sides of the carrier S and are as close to the edges of the two sides of the carrier S as possible.

[0080] In addition, the feeding portion 11 has a third section 111, and a second coupling gap CG2 is provided between the third section 111 and the residual band SB, and the second coupling gap CG2 is less than or equal to 7 mm. Therefore, the third section 111 can be excited to generate an operating frequency band of 5000 MHz to 5925 MHz, and the matching effect is further optimized by designing the second coupling gap CG2.

[0081] See also Figure 4 and Figure 5 As shown, Figure 4 and Figure 5 The three-dimensional schematic diagrams of the antenna module of the present invention at different viewing angles are shown respectively. For example, the antenna module M can be disposed on a carrier S, and the first radiation element 1, the second radiation element 2 and the third radiation element 3 are metal conductors formed on different surfaces of the carrier S by laser engraving, for example. Figure 4 and Figure 5 As shown, the carrier S includes a first surface S1, a second surface S2, a third surface S3 and a fourth surface S4. The first surface S1 is opposite to the second surface S2, the third surface S3 is opposite to the fourth surface S4, and the third surface S3 and the fourth surface S4 are connected between the first surface S1 and the second surface S2.

[0082] The feeding portion 11, the radiating portion 12 and the grounding portion 13 of the first radiating element 1 are arranged on the first surface S1, and the first section 121 of the radiating portion 12 extends from the fourth surface S4 to the second surface S2. The grounding portion 13 is connected to a grounding element G. The feeding element F includes a grounding terminal F1 and a signal terminal F2, the grounding terminal F1 is electrically connected to the grounding element G, and the signal terminal F2 is electrically connected to the feeding portion 11. The second radiating element 2 and the switching circuit 4 are arranged on the second surface S2. The connecting portion 30 of the third radiating element 3 is connected to the switching circuit 4. The third radiating element 3 first extends from the second surface S2 to the fourth surface S4, and then extends from the fourth surface S4 to the first surface S1. Figure 4 As shown, the first widened portion 31 is disposed on the first surface S1. Then, the third radiation element 3 extends from the first surface S1 to the third surface S3, and then extends from the third surface S3 to the second surface S2. Figure 5 As shown, the residual tape SB is arranged on the second surface S2.

[0083] Since the sections of the third radiation element 3 can be distributed on different surfaces of the carrier S, for example, the first section 121 and the coupling section of the third radiation element 3 are both located on the second surface S2 of the carrier S, and the third section 111 and the residual tape SB are respectively located on the first surface S1 and the second surface S2 of the carrier S. Therefore, the coupling gap between the third radiation element 3 and the first radiation element 1 actually refers to the shortest distance between the third radiation element 3 and the first radiation element 1. For example, Figure 2 As shown, the first coupling gap CG1 between the first segment 121 and the third radiation element 3 refers to the shortest distance between the first segment 121 and the third radiation element 3, and the second coupling gap CG2 between the third segment 111 and the residual band SB refers to the shortest distance between the third segment 111 and the residual band SB.

[0084] See also Figure 6 As shown, Figure 6 It is a schematic diagram of a reflection loss curve of the antenna module of the present invention. Figure 6 The return loss curves of the conventional antenna module and the antenna module M of the present invention are shown. The conventional antenna module refers to a proximity sensing circuit without an independent floating radiating arm; the antenna module M of the present invention refers to a proximity sensing circuit 5 with an independent radiating element. Figure 6 It can be seen that since the antenna module M of the present invention is matched with an independent radiating element (i.e., the third radiating element 3) through the proximity sensing circuit 5, it can generate dual modes in the low frequency range (617MHz to 960MHz) to cover more frequency bands, has a wider frequency performance in the medium frequency range (3000MHz to 3800MHz), and has a better matching effect in the high frequency range (5000MHz to 5925MHz).

[0085] See also Figure 7 and Figure 8 As shown, Figure 7 is a schematic diagram of a gain curve of the antenna module of the present invention in a low frequency range, Figure 8 It is a schematic diagram of the gain curve of the antenna module of the present invention in the high frequency range. Figure 7 and Figure 8 The gain curves of the existing antenna module and the antenna module M of the present invention in the low frequency range (617MHz to 960MHz) and the medium and high frequency range (3000MHz to 5925MHz) are shown. Figure 7 and Figure 8 It can be seen that since the antenna module M of the present invention is equipped with an independent radiating element (ie, the third radiating element 3) through the proximity sensing circuit 5, it can cover more frequency bands through dual mode in the low frequency range and has better efficiency performance in the mid-high frequency range.

[0086] [Beneficial Effects of Embodiments]

[0087] The electronic device and antenna module provided by the present invention can use the technical solution of "the third radiating element 3 is electrically connected to the proximity sensing circuit 5, the third radiating element 3 and the second radiating element 2 are separated from each other, and the third radiating element 3 and the radiating portion 12 are separated from each other and coupled to each other" to make the proximity sensing circuit 5 of the antenna module M be equipped with an independent radiating element (i.e., the third radiating element 3). In this way, the proximity sensing circuit 5 can have a better sensing distance.

[0088] In addition, the present invention can further increase the sensing distance of the proximity sensing circuit 5 on both sides of the antenna module M through the design of the first widened portion 31 and the second widened portion 32, thereby improving the sensitivity of sensing the change of the surrounding capacitance.

[0089] Furthermore, the third radiating element 3 can also optimize the antenna characteristics, and can also generate low-frequency dual-mode with the second radiating element 2 to achieve a wider-band operation. The antenna module M of the present invention can generate dual-mode in the low-frequency range (617MHz to 960MHz) to cover more frequency bands through the configuration of the third radiating element 3, and has a wider-band performance in the medium-frequency range (3000MHz to 3800MHz), and has a better matching effect in the high-frequency range (5000MHz to 5925MHz).

[0090] 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 electronic device, comprising: a housing; as well as An antenna module is disposed in the housing, and includes: a first radiation element, the first radiation element comprising a feeding portion, a radiation portion and a grounding portion, the feeding portion and the grounding portion being connected to the radiation portion; a switching circuit; a proximity sensing circuit; a second radiating element, the second radiating element being electrically connected to the switching circuit, the second radiating element and the radiating portion being separated from each other and coupled to each other; and A third radiating element is electrically connected to the proximity sensing circuit. The third radiating element is separated from the second radiating element, and the third radiating element is separated from the radiating portion and coupled to each other.

2. The electronic device according to claim 1, wherein: The radiation portion has a first section, the first section is located between the feeding portion and the grounding portion, and a first coupling gap is provided between the first section and the third radiation element, and the first coupling gap is less than or equal to 7 mm.

3. The electronic device as claimed in claim 2, wherein: The radiation part also has a second section. The feeding part is located between the first section and the second section. A portion of the third radiation element crosses over the second section to form a residual strip.

4. The electronic device as claimed in claim 3, wherein: The third radiation element includes a first widened portion and a second widened portion, the first widened portion and the second widened portion are respectively located at two sides of the grounding portion, and the second widened portion is a part of the residual band.

5. The electronic device as claimed in claim 4, wherein: The first widened portion and the second widened portion are respectively located at two side edge regions of the antenna module.

6. The electronic device as claimed in claim 5, wherein: The first widened portion has a first side and a second side opposite to each other, the second widened portion has a third side and a fourth side opposite to each other, a first preset width is provided between the first side and the second side, a second preset width is provided between the third side and the fourth side, and both the first preset width and the second preset width are at least greater than 3 mm.

7. The electronic device as claimed in claim 4, wherein: The second section is used to be excited to generate an operating frequency band. The residual band has a starting end and an open end. The starting end coincides with the edge of the second section. The residual band has a path length from the starting end to the open end, and the path length is equal to 1 / 4 wavelength of the operating frequency band.

8. The electronic device as claimed in claim 3, wherein: The feeding portion has a third section. A second coupling gap is formed between the third section and the residual tape. The second coupling gap is less than or equal to 7 mm.

9. The electronic device as claimed in claim 1, wherein: The switching circuit includes a first path having a first switch.

10. The electronic device according to claim 9, wherein: The first path also includes a first passive element, and the switching circuit also includes a second path, and the second path includes a second switching switch and a second passive element; wherein the switching circuit is used to switch to a first mode and a second mode according to the switching states of the first switching switch and the second switching switch, and the equivalent impedance generated by the switching circuit in the first mode is different from the equivalent impedance generated by the switching circuit in the second mode.

11. The electronic device according to claim 1, wherein: The antenna module further includes an inductor element electrically connected between the third radiation element and the proximity sensing circuit.

12. An antenna module, comprising: a first radiation element, the first radiation element comprising a feeding portion, a radiation portion and a grounding portion, the feeding portion and the grounding portion being connected to the radiation portion; a switching circuit; a proximity sensing circuit; a second radiating element, the second radiating element being electrically connected to the switching circuit, the second radiating element and the radiating portion being separated from each other and coupled to each other; as well as A third radiating element is electrically connected to the proximity sensing circuit. The third radiating element is separated from the second radiating element, and the third radiating element is separated from the radiating portion and coupled to each other.

13. The antenna module according to claim 12, wherein: The radiation portion has a first section, the first section is located between the feeding portion and the grounding portion, and a first coupling gap is provided between the first section and the third radiation element, and the first coupling gap is less than or equal to 7 mm.

14. The antenna module according to claim 13, wherein: The radiation part also has a second section. The feeding part is located between the first section and the second section. A portion of the third radiation element crosses over the second section to form a residual strip.

15. The antenna module according to claim 14, wherein: The third radiation element includes a first widened portion and a second widened portion, the first widened portion and the second widened portion are respectively located at two sides of the grounding portion, and the second widened portion is a part of the residual band.

16. The antenna module according to claim 15, wherein: The first widened portion and the second widened portion are respectively located at two side edge regions of the antenna module.

17. The antenna module according to claim 16, wherein: The first widened portion has a first side and a second side opposite to each other, the second widened portion has a third side and a fourth side opposite to each other, a first preset width is provided between the first side and the second side, a second preset width is provided between the third side and the fourth side, and both the first preset width and the second preset width are at least greater than 3 mm.

18. The antenna module according to claim 15, wherein: The second section is used to be excited to generate an operating frequency band. The residual band has a starting end and an open end. The starting end coincides with the edge of the second section. The residual band has a path length from the starting end to the open end, and the path length is equal to 1 / 4 wavelength of the operating frequency band.

19. The antenna module according to claim 14, wherein: The feeding portion has a third section. A second coupling gap is formed between the third section and the residual tape. The second coupling gap is less than or equal to 7 mm.

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