Antenna module and electronic device

Abstract

The invention discloses an antenna module and an electronic device. The antenna module comprises a substrate, and a floating radiation unit, a low-frequency radiation unit and a feed-in unit which are arranged on the substrate. The substrate has a first direction and a second direction which is not parallel to the first direction. The floating radiation unit and the low-frequency radiation unit are arranged at intervals along the first direction, and the floating radiation unit and the low-frequency radiation unit have a common side in the second direction. The feed-in unit is located on the common side. The feed-in unit is arranged at an interval with the floating radiation unit and the low-frequency radiation unit along the second direction. A projection path of the feed-in unit along the second direction can pass through the floating radiation unit and the low-frequency radiation unit, and the feed-in unit can be respectively matched with the floating radiation unit and the low-frequency radiation unit for coupling.

Description

Technical Field

[0001] The present invention relates to an antenna module and an electronic device, and in particular to an antenna module and an electronic device which can ensure that a mid-frequency band maintains expected characteristics when switching a low-frequency band. Background Art

[0002] In order to meet the needs of different usage scenarios or product positioning, existing antenna modules can have the function of adjusting bandwidth (for example, existing antenna modules can switch between high frequency band, medium frequency band and low frequency band). However, when the existing antenna module switches to the low frequency band, the characteristics of the medium frequency band are easily disturbed, resulting in unexpected changes in the characteristics of the medium frequency band.

[0003] Therefore, the inventors believe that the above defects can be improved, and have devoted themselves to research and applied scientific principles, and finally proposed the present invention which has a reasonable design and effectively improves the above defects. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an antenna module and an electronic device in view of the deficiencies in the prior art.

[0005] An embodiment of the present invention discloses an antenna module, comprising: a substrate having a first direction and a second direction not parallel to the first direction; a floating radiation unit and a low-frequency radiation unit, respectively arranged on the substrate, the floating radiation unit being arranged at intervals from the low-frequency radiation unit along the first direction, and the floating radiation unit and the low-frequency radiation unit having a common side in the second direction; and a feeding unit, arranged on the substrate and located on the common side, the feeding unit being arranged at intervals from the floating radiation unit and the low-frequency radiation unit along the second direction; a projection path of the feeding unit along the second direction can pass through the floating radiation unit and the low-frequency radiation unit, and the feeding unit can cooperate with the floating radiation unit and the low-frequency radiation unit for coupling respectively.

[0006] Preferably, the feeding unit defines a first portion and a second portion along the first direction, the position of the first portion corresponds to the floating radiation unit, and the position of the second portion corresponds to the low-frequency radiation unit; the first portion has a first length along the first direction, the second portion has a second length along the first direction, and the first length is smaller than the second length.

[0007] Preferably, the ratio of the first length to the second length is 3:7.

[0008] Preferably, there is a first spacing distance between the first portion and the floating radiation unit, there is a second spacing distance between the second portion and the low-frequency radiation unit, and the first spacing distance is greater than the second spacing distance.

[0009] Preferably, the antenna module further comprises a grounding unit, wherein the grounding unit is disposed on the substrate, and a projection path of the grounding unit along the second direction can pass through the floating radiation unit.

[0010] Preferably, the antenna module further includes a control unit electrically coupled to the low-frequency radiation unit, the control unit includes a proximity sensing circuit and an adjustment circuit, the proximity sensing circuit has a shared capacitor, and the adjustment circuit is electrically coupled to the proximity sensing circuit via the shared capacitor.

[0011] Preferably, the frequency emitted by the low-frequency radiation unit through the control unit is between 617 MHz and 960 MHz.

[0012] An embodiment of the present invention further discloses an electronic device, comprising the above-mentioned antenna module.

[0013] To summarize, the antenna module and the electronic device disclosed in the embodiments of the present invention can avoid unexpected changes in the characteristics of the mid-frequency band when switching to the low-frequency band through the designs of "the floating radiating unit is arranged at intervals with the low-frequency radiating unit along the first direction, and the feeding unit is arranged at intervals with the floating radiating unit and the low-frequency radiating unit along the second direction" and "a projection path of the feeding unit along the second direction can pass through the floating radiating unit and the low-frequency radiating unit, and the feeding unit can respectively cooperate with the floating radiating unit and the low-frequency radiating unit for coupling".

[0014] 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

[0015] Figure 1 It is a schematic plan view of the antenna module of the present invention.

[0016] Figure 2 for Figure 1 A magnified schematic diagram of a local area of ​​II.

[0017] Figure 3 FIG. 4 is a schematic side view of an antenna module according to an embodiment of the present invention.

[0018] Figure 4FIG. 4 is a schematic top view of an antenna module according to an embodiment of the present invention.

[0019] Figure 5 FIG. 4 is a schematic side view of an antenna module according to another embodiment of the present invention.

[0020] Figure 6 FIG. 4 is a schematic top view of an antenna module according to another embodiment of the present invention.

[0021] Figure 7 FIG. 4 is a schematic diagram of a control unit in one embodiment of the present invention.

[0022] Figure 8 FIG. 4 is a schematic diagram of a control unit in one embodiment of the present invention.

[0023] Fig. 9 Schematic diagram of the curve of reflection loss of the antenna module of the present invention through different paths. 100, 100', 100": antenna module 1: substrate

[0024] 2: Floating radiating unit

[0025] 3: Low frequency radiation unit

[0026] CP: contact

[0027] 4: Feeding unit

[0028] 41: The first part

[0029] 42: Second part

[0030] L41: First length

[0031] L42: Second length

[0032] 5: Grounding unit

[0033] 6: Control unit

[0034] 61: Proximity sensing circuit

[0035] 611: Inductive Inductor

[0036] 62: Regulation circuit

[0037] 621: Capacitor

[0038] 622: Variable Capacitor

[0039] 623: Inductor

[0040] 624: Switch

[0041] S: shared capacitor

[0042] D1: First direction

[0043] D2: Second direction

[0044] S1: First interval distance

[0045] S2: Second interval distance

[0046] P: Induction tracking parts

[0047] T1: First operating frequency band

[0048] T2: Second operating frequency band

[0049] T3: Third operating band

[0050] T4: Fourth operating band

[0051] T5: Fifth operating frequency band. DETAILED DESCRIPTION

[0052] The following is an explanation of the implementation methods of the "antenna module and electronic device" disclosed in the present invention through specific embodiments. 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 the details in this specification can also be modified and changed in various ways 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 and are not depicted according to actual dimensions. It is stated in advance. The following implementation methods will further explain the relevant technical contents of the present invention in detail, but the disclosed contents are not intended to limit the scope of protection of the present invention.

[0053] It should be understood that, although the terms "first", "second", "third", etc. may be used in this document to describe various components or signals, these components or signals should not be limited by these terms. These terms are mainly used to distinguish one component from another component, or one signal from another signal. In addition, the term "or" used in this document may include any one or more combinations of the associated listed items depending on the actual situation.

[0054] In addition, in the following description, if it is indicated to refer to a specific figure or as shown in a specific figure, it is only used to emphasize that most of the related content described in the subsequent description appears in the specific figure, but it does not limit the subsequent description to only refer to the specific figure.

[0055] See also Figures 1 to 9 As shown, this embodiment provides an antenna module 100. Figure 1As shown, the antenna module 100 comprises a substrate 1, and a floating radiation unit 2, a low frequency radiation unit 3 and a feeding unit 4 disposed on the substrate 1. Next, the components of the antenna module 100 and their connection relationships are introduced below.

[0056] like Figure 1 As shown, the substrate 1 is made of insulating material, and the substrate 1 has a first direction D1 and a second direction D2 that is not parallel to the first direction D1. The first direction D1 can be the length extension direction of the substrate 1 in practice, and the second direction D2 can be the width extension direction of the substrate 1 in practice. The first direction D1 and the second direction D2 are perpendicular to each other in this embodiment, but the present invention is not limited to this. For example, in other embodiments of the present invention that are not shown, the first direction D1 and the second direction D2 can have an angle less than (or greater than) 90 degrees.

[0057] It should be noted that, in practice, the substrate 1 can be designed as a three-dimensional structure (eg, curved surface, plate) according to the application requirements of the electronic device. Figure 3 and Figure 4 The antenna module 100 ′ of one embodiment shown in FIG. Figure 5 and Figure 6 An antenna module 100 of another embodiment is shown. For ease of understanding, the antenna module 100 of the present invention is described in a flat state (ie, the substrate 1 is a sheet-like structure), but the present invention is not limited thereto.

[0058] Re-reference Figure 1 and Figure 2 As shown, the floating radiation unit 2, the low-frequency radiation unit 3, and the feeding unit 4 are each a sheet of conductive metal in this embodiment, and the floating radiation unit 2, the low-frequency radiation unit 3, and the feeding unit 4 can be arranged on the substrate 1 in a bent manner according to the shape of the substrate 1 (such as Figures 3 to 6 For ease of understanding, the floating radiation unit 2, the low-frequency radiation unit 3 and the feeding unit 4 are described below in a flat state (ie, spread out) (eg Figure 1 and Figure 2 shown).

[0059] Specifically, the floating radiation unit 2 and the low-frequency radiation unit 3 are each an elongated structure along the first direction D1, and the floating radiation unit 2 is disposed on the substrate 1 along the first direction D1 and is spaced apart from the low-frequency radiation unit 3. The floating radiation unit 2 and the low-frequency radiation unit 3 have a common side in the second direction D2.

[0060] In addition, the feeding unit 4 is disposed on the substrate 1 and is located at the common side, and the feeding unit 4 is spaced apart from the floating radiation unit 2 and the low-frequency radiation unit 3 along the second direction D2. The feeding unit 4 is located across the floating radiation unit 2 and the low-frequency radiation unit 3. That is, a projection path of the feeding unit 4 along the second direction D2 (for example, along Figure 2 The feeding unit 4 can be coupled with the floating radiation unit 2 and the low-frequency radiation unit 3 at the same time.

[0061] It is worth noting that in order to more effectively avoid unexpected changes in the intermediate frequency characteristics, the length of the feeding unit 4 corresponding to the position of the floating radiation unit 2 is preferably smaller than the length of the feeding unit 4 corresponding to the position of the low-frequency radiation unit 3.

[0062] In detail, the feed unit 4 defines a first portion 41 and a second portion 42 along the first direction D1, the position of the first portion 41 corresponds to the floating radiation unit 2, and the position of the second portion 42 corresponds to the low-frequency radiation unit 3. The first portion 41 has a first length L41 along the first direction D1, and the second portion 42 has a second length L42 along the first direction D1, and the first length L41 is smaller than the second length L42. Preferably, the ratio of the first length L41 to the second length L42 can be 3:7, but the present invention is not limited thereto. For example, the ratio of the first length L41 to the second length L42 can be other values.

[0063] In addition, when the length of the feed unit 4 corresponding to the position of the floating radiation unit 2 is less than the length of the feed unit 4 corresponding to the position of the low-frequency radiation unit 3, the spacing distance between the first portion 41 and the floating radiation unit 2 and the spacing distance between the second portion 42 and the low-frequency radiation unit 3 may be unequal, thereby optimizing the signal. Specifically, there is a first spacing distance S1 between the first portion 41 and the floating radiation unit 2, and there is a second spacing distance S2 between the second portion 42 and the low-frequency radiation unit 3, and the relationship between the first spacing distance S1 and the second spacing distance S2 is inversely related to the relationship between the first length L41 and the second length L42, that is, the first spacing distance S1 is greater than the second spacing distance S2.

[0064] In one embodiment, the antenna module 100 further includes a grounding unit 5, and the grounding unit 5 is disposed on the substrate 1. The grounding unit 5 has a projection path along the second direction D2 (for example, along Figure 2 The floating radiation unit 2 can pass through the floating radiation unit 2, and a projection path of the ground unit 5 along the first direction D1 (for example, along Figure 2 The grounding unit 5 is located at a common side of the feeding unit 4 and the floating radiation unit 2.

[0065] In addition, in another embodiment, the antenna module 100 further includes a control unit 6 electrically coupled to the low-frequency radiation unit 3, and the low-frequency radiation unit 3 can emit a frequency between 617 MHz and 960 MHz through the control unit 6. The control unit 6 includes a proximity sensing circuit 61 and an adjustment circuit 62, the proximity sensing circuit 61 has a shared capacitor S, and the adjustment circuit 62 is electrically coupled to the proximity sensing circuit 61 through the shared capacitor S.

[0066] In detail, Figure 1 , Figure 7 and Figure 8 As shown, the low-frequency radiation unit 3 has two contacts CP at one end away from the floating radiation unit 2. The proximity sensing circuit 61 also includes an inductive inductor 611, which is electrically coupled to one of the contacts CP, so as to be further used to connect a sensing tracking component P ((P-sensor module) to form an open circuit state between the antenna signal and the sensing circuit module P to isolate the antenna signal from interference). In addition, the shared capacitor S of the proximity sensing circuit 61 is electrically coupled to another contact CP, and the shared capacitor S is connected to the adjustment circuit 62. Among them, the configuration of the adjustment circuit 62 is not particularly limited in this embodiment. For example, if Figure 7 As shown, the regulating circuit 62 may include a plurality of grounded capacitors 621, a variable capacitor 622, an inductor 623, and a plurality of switches 624 connecting the plurality of capacitors 621 and the inductor 623, so as to achieve the purpose of regulation. Figure 8 As shown, the regulating circuit 62 may include a plurality of grounded inductors 623 and a variable capacitor 622 , and a plurality of switches 624 connecting the plurality of inductors 623 , so as to achieve the purpose of regulation.

[0067] Accordingly, the antenna module 100 of the present invention adopts the design that "the adjustment circuit 62 is electrically coupled to the proximity sensing circuit 61 through the shared capacitor S", so that the adjustment circuit 62 and the proximity sensing circuit 61 share the shared capacitor S. Therefore, the antenna module 100 of the present invention can save more capacitors compared to the existing planar inverted-F antenna (PIFA) structure under the adjustment and sensing functions (i.e., p-sensor and tuner), thereby further saving manufacturing processes and increasing the space available on the substrate 1.

[0068] It should be noted that if Fig. 9 As shown, Fig. 9 The curve in is a schematic diagram of the reflection loss of the antenna module 100 through different paths. Specifically, the antenna module 100 can switch to a first mode, a second mode, a third mode, a fourth mode, and a fifth mode in the low frequency band. When the antenna module 100 is in the first mode, the antenna module 100 can generate a first operating frequency band T1 through the floating radiation unit 2, the low-frequency radiation unit 3, and the feeding unit 4. When the antenna module 100 is in the second mode, the antenna module 100 can generate a second operating frequency band T2 through the floating radiation unit 2, the low-frequency radiation unit 3, and the feeding unit 4. When the antenna module 100 is in the third mode, the antenna module 100 can generate a third operating frequency band T3 through the floating radiation unit 2, the low-frequency radiation unit 3, and the feeding unit 4. When the antenna module 100 is in the fourth mode, the antenna module 100 can generate a fourth operating frequency band T4 through the floating radiation unit 2, the low-frequency radiation unit 3, and the feeding unit 4. When the antenna module 100 is in the fifth mode, the antenna module 100 can generate a fifth operating frequency band T5 through the floating radiation unit 2, the low-frequency radiation unit 3, and the feeding unit 4.

[0069] The center frequency of the first operating frequency band T1, the center frequency of the second operating frequency band T2, the center frequency of the third operating frequency band T3, the center frequency of the fourth operating frequency band T4, and the center frequency of the fifth operating frequency band T5 may be different from each other. For example, the first operating frequency band T1 is B71 in the wireless wide area network (Wireless Wide Area Network; WWAN) frequency band, the second operating frequency band T2 is B12, B17, B29 and B85 in the WWAN frequency band, the third operating frequency band T3 is B13, B14 and B28 in the WWAN frequency band, the fourth operating frequency band T4 is B5, B6, B18, B19, B20, B26, B27, n91 and n92 in the WWAN frequency band, and the fifth operating frequency band T5 is n93, n94 and B8 in the WWAN frequency band.

[0070] In addition, by Fig. 9 It can be known that the first operating frequency band T1, the second operating frequency band T2, the third operating frequency band T3, the fourth operating frequency band T4, and the fifth operating frequency band T5 are substantially overlapped in the mid-frequency band (eg, between 1400 MHz and 6000 MHz).

[0071] That is to say, the antenna module 100 and the electronic device can ensure that the mid-frequency band maintains its characteristics when switching to the low-frequency band, that is, when the conventional antenna module is switched to the low-frequency band, the frequency of the mid-frequency band will shift and affect the characteristics. Fig. 9 It can also be known that the antenna module 10 of the present invention has better performance in the low frequency band than the existing PIFA coupled antenna.

[0072] [Technical Effects of Embodiments of the Invention]

[0073] To summarize, the antenna module and the electronic device disclosed in the embodiments of the present invention can avoid unexpected changes in the characteristics of the mid-frequency band when switching to the low-frequency band through the designs of "the floating radiating unit is arranged at intervals with the low-frequency radiating unit along the first direction, and the feeding unit is arranged at intervals with the floating radiating unit and the low-frequency radiating unit along the second direction" and "a projection path of the feeding unit along the second direction can pass through the floating radiating unit and the low-frequency radiating unit, and the feeding unit can respectively cooperate with the floating radiating unit and the low-frequency radiating unit for coupling".

[0074] The contents disclosed above are only preferred feasible embodiments of the present invention, and are not intended to limit the scope of the present invention. Therefore, all equivalent technical changes made using the contents of the present invention's specification and drawings are included in the scope of the present invention.

Claims

1. An antenna module, characterized in that: include: A substrate having a first direction and a second direction not parallel to the first direction; a floating radiation unit and a low-frequency radiation unit, respectively disposed on the substrate, the floating radiation unit being spaced apart from the low-frequency radiation unit along the first direction, and the floating radiation unit and the low-frequency radiation unit having a common side in the second direction; as well as A feeding unit is arranged on the substrate and located on the common side, and the feeding unit is arranged to be spaced apart from the floating radiation unit and the low-frequency radiation unit along the second direction; a projection path of the feeding unit along the second direction can pass through the floating radiation unit and the low-frequency radiation unit, and the feeding unit can cooperate with the floating radiation unit and the low-frequency radiation unit for coupling respectively.

2. The antenna module according to claim 1, characterized in that: The feeding unit is defined with a first portion and a second portion along the first direction, the position of the first portion corresponds to the floating radiation unit, and the position of the second portion corresponds to the low-frequency radiation unit; the first portion has a first length along the first direction, and the second portion has a second length along the first direction, and the first length is smaller than the second length.

3. The antenna module according to claim 2, characterized in that: The ratio of the first length to the second length is 3:

7.

4. The antenna module according to claim 2, characterized in that: There is a first spacing distance between the first portion and the floating radiation unit, and there is a second spacing distance between the second portion and the low-frequency radiation unit, and the first spacing distance is greater than the second spacing distance.

5. The antenna module according to claim 1, characterized in that: The invention also comprises a grounding unit, wherein the grounding unit is arranged on the substrate, and a projection path of the grounding unit along the second direction can pass through the floating radiation unit.

6. The antenna module according to claim 1, characterized in that: It also includes a control unit electrically coupled to the low-frequency radiation unit, the control unit includes a proximity sensing circuit and an adjustment circuit, the proximity sensing circuit has a shared capacitor, and the adjustment circuit is electrically coupled to the proximity sensing circuit through the shared capacitor.

7. The antenna module according to claim 6, characterized in that: The frequency emitted by the low-frequency radiation unit through the control unit is between 617 MHz and 960 MHz.

8. An electronic device comprising the antenna module according to any one of claims 1 to 7.

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