CN117335145A - Antenna module and electronic device - Google Patents

Abstract

An antenna module and an electronic device. The antenna module comprises a first radiation piece, a second radiation piece and a feed-in piece; the first radiation piece comprises a first radiation part, a second radiation part and a feed-in part, wherein the feed-in part is connected between the first radiation part and the second radiation part, and the length of the first radiation part is longer than that of the second radiation part; the second radiation piece and the first radiation part are separated from each other and are mutually coupled, the second radiation piece comprises a connecting part, a third radiation part and a fourth radiation part, the connecting part is connected between the third radiation part and the fourth radiation part, and the third radiation part and the fourth radiation part are not equal in length; the feed-in piece is connected to the feed-in part and is used for feeding in a signal. The antenna module and the electronic device provided by the invention improve the bandwidth of the antenna module in a low frequency range and a medium-high frequency range.

Description

Antenna module and electronic device

Technical Field

The present invention relates to an antenna module and an electronic device, and more particularly, to an antenna module and an electronic device suitable for LTE (Long Term Evolution ) full band.

Background

Existing electronic products, such as notebook computers and tablet computers, have a trend toward a light and thin design. However, under the circumstance that the existing electronic products are designed toward miniaturization, the space for accommodating the antenna inside the product is insufficient, so that the designed antenna structure has the problem of insufficient bandwidth.

Therefore, how to overcome the above-mentioned drawbacks by improving the structural design has become one of the important problems to be solved in this field.

Therefore, there is a need to provide an antenna module and an electronic device to solve the above problems.

Disclosure of Invention

The invention aims to solve the technical problem of providing an antenna module and an electronic device which can be designed to have enough bandwidth under the trend of miniaturization of the existing electronic product.

In order to solve the above-mentioned problems, one of the technical solutions adopted by the present invention is to provide an antenna module, which includes a first radiating element, a second radiating element, and a feeding element. The first radiating piece comprises a first radiating part, a second radiating part and a feed-in part, wherein the feed-in part is connected between the first radiating part and the second radiating part, and the length of the first radiating part is greater than that of the second radiating part. The second radiating element and the first radiating portion are separated from each other and coupled to each other. The second radiating element comprises a connecting part, a third radiating part and a fourth radiating part, wherein the connecting part is connected between the third radiating part and the fourth radiating part, and the third radiating part and the fourth radiating part are not equal in length. The feed-in piece is connected to the feed-in part and is used for feeding in a signal.

In order to solve the above-mentioned problems, another aspect of the present invention is to provide an electronic device, which includes a housing and an antenna module disposed in the housing. The antenna module comprises a first radiating element, a second radiating element and a feed-in element. The first radiating piece comprises a first radiating part, a second radiating part and a feed-in part, wherein the feed-in part is connected between the first radiating part and the second radiating part, and the length of the first radiating part is greater than that of the second radiating part. The second radiating element and the first radiating portion are separated from each other and coupled to each other. The second radiating element comprises a connecting part, a third radiating part and a fourth radiating part, wherein the connecting part is connected between the third radiating part and the fourth radiating part, and the third radiating part and the fourth radiating part are not equal in length. The feed-in piece is connected to the feed-in part and is used for feeding in a signal.

The antenna module and the electronic device provided by the invention have the beneficial effects that the bandwidth of the antenna module in a low frequency range and a medium and high frequency range can be improved through the technical scheme of separating and coupling the second radiating piece and the first radiating part with each other and the technical scheme of not equal length between the third radiating part and the fourth radiating part.

For a further understanding of the nature and the technical aspects of the present invention, reference should be made to the following detailed description of the invention and the accompanying drawings, which are provided for purposes of reference only and are not intended to limit the invention.

Drawings

Fig. 1 is a schematic perspective view of an electronic device according to the present invention.

Fig. 2 is a schematic diagram of an antenna module according to the present invention.

Fig. 3 is a schematic diagram of a second radiator and an integration module of the antenna module of the present invention.

Fig. 4 is a schematic diagram of a second radiator and a switching circuit of the antenna module according to the present invention.

Fig. 5 is a schematic diagram showing the return loss of the antenna module of the present invention when only the first radiator is provided.

FIG. 6 is a schematic graph showing the return loss of the first radiation member plus the second radiation member.

Fig. 7 is a schematic diagram of a return loss of the antenna module in the first mode.

Fig. 8 is a schematic diagram of a return loss of the antenna module in the second mode.

Fig. 9 is a schematic diagram of a return loss of the antenna module in the third mode.

Fig. 10 is a schematic diagram of a return loss of the antenna module in the fourth mode.

Description of main reference numerals:

d electronic device

S-shaped shell

M antenna module

1. First radiating element

11. A first radiation part

111. Open end

12. A second radiation part

13. Feed-in part

14. Grounding part

2. Second radiating element

21. Connecting part

211. First support arm

212. Second support arm

22. A third radiation part

23. Fourth radiating part

231. Side edge

3. Feed-in piece

4. Proximity sensing circuit

5. Inductance element

6. Capacitive element

7. Switching circuit

8. Control circuit

H1 First coupling gap

H2 Second coupling gap

W1 first predetermined width

W2 second predetermined width

L1 first predetermined length

L2 second predetermined length

B substrate

G grounding piece

T integration module

T1 and T2 pins

P signal conduction path

P1 first path

P2 second path

P3 third path

E1 First passive element

E2 Second passive element

E3 Third passive element

SW1 first switch

SW2 second change-over switch

SW3 third switch

Detailed Description

The following specific embodiments are described in order to explain the present invention, which relates to an antenna module and an electronic device, and those skilled in the art can appreciate the advantages and effects of the present invention from the disclosure herein. The invention is capable of other and different embodiments and its several details are capable of modification and variation in various respects, all from the point of view and application, all without departing from the spirit of the present invention. The drawings of the present invention are merely schematic illustrations, and are not intended to be drawn to actual dimensions. The following embodiments will further illustrate the related art content of the present invention in detail, but the disclosure is not intended to limit the scope of the present invention. In addition, it should be understood that, although terms such as "first," "second," "third," etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used primarily to distinguish one element from another element. In addition, the term "or" as used herein shall include any one or combination of more of the associated listed items as the case may be. In addition, "connection" in the present invention is that there is a physical connection between two elements and is a direct connection or an indirect connection, and "coupling" in the present invention is that there is no physical connection between two elements but the electric field energy (electric field energy) generated by the current of one element excites the electric field energy of the other element.

Examples (example)

Referring to fig. 1 and 2, fig. 1 is a schematic perspective view of an electronic device according to the present invention, and fig. 2 is a schematic view of an antenna module according to the present invention. The invention provides an electronic device D, which comprises a shell S and an antenna module M arranged in the shell S. Preferably, the antenna module M is disposed on a substrate B. For example, the electronic device D may be a notebook computer, and the substrate B may be an FR4 (frame reflector 4) substrate, a printed circuit board (Printed Circuit Board, PCB) or a flexible printed circuit board (Flexible Printed Circuit Board, FPCB), which is not limited to the present invention.

As shown in fig. 2, the antenna module M includes a first radiating element 1, a second radiating element 2, a feeding element 3, and a ground element G. The first radiating element 1 comprises a first radiating portion 11, a second radiating portion 12 and a feeding portion 13, wherein the feeding portion 13 is connected between the first radiating portion 11 and the second radiating portion 12. Further, the first radiation portion 11 may extend toward the positive X-axis direction relative to the feeding portion 13, the second radiation portion 12 may extend toward the negative X-axis direction relative to the feeding portion 13, the first radiation portion 11 and the second radiation portion 12 are parallel to each other, and the length of the first radiation portion 11 is greater than the length of the second radiation portion 12. Thus, the first radiating element 1 may be a Monopole antenna (Monopole antenna), but the invention is not limited thereto. As shown in fig. 2, the first radiation member 1 may further include a grounding portion 14, and the grounding portion 14 is connected between the grounding member G and the first radiation portion 11. Thus, the first radiator 1 of the present invention may also be a Planar inverted-F antenna (PIFA). In addition, for example, the first radiating element 1, the second radiating element 2 and the grounding element G may be a metal sheet, a metal wire or other conductive body with conductive effect, and the grounding element G may be electrically connected to the housing S of the electronic device D. The feeding element 3 may be a Coaxial cable (Coaxial cable), and the feeding element 3 is connected to the feeding portion 13. The feeding element 3 is used for feeding a signal to excite the first radiating element 1 to generate an operation frequency band with a frequency range between 698MHz and 6000 MHz.

With continued reference to fig. 2, in the present embodiment, the first radiation member 1 and the second radiation member 2 are disposed on the same surface of the substrate B, and the second radiation member 2 is disposed adjacent to the first radiation member 1, but the invention is not limited thereto. In other embodiments, the first radiator 1 and the second radiator 2 may be disposed on different surfaces of the substrate B. Whether the first radiating element 1 and the second radiating element 2 are disposed on the same surface or different surfaces of the substrate B, the second radiating element 2 and the first radiating portion 11 are separated from each other and coupled to each other. The second radiator 2 comprises a connection portion 21, a third radiator 22 and a fourth radiator 23. The connection portion 21 is connected between the third radiation portion 22 and the fourth radiation portion 23. Further, the third radiating portion 22 may extend toward the negative X-axis direction with respect to the connecting portion 21, the fourth radiating portion 23 may extend toward the positive X-axis direction with respect to the connecting portion 21, the third radiating portion 22 and the fourth radiating portion 23 may be parallel to each other, and the third radiating portion 22 and the fourth radiating portion 23 may be not equal in length. Therefore, the second radiator 2 of the present invention is an antenna structure with a T-shape, but the present invention is not limited thereto.

Referring to fig. 2 and 3, fig. 3 is a schematic diagram of a second radiator and an integration module of the antenna module according to the present invention. The first radiation portion 11 and the third radiation portion 22 have a first coupling gap H1 therebetween along a first direction, which is parallel to the Y-axis direction. Thereby, the first radiating portion 11 and the third radiating portion 22 are separated from each other and coupled to each other to generate an operation band having a frequency range between 617MHz and 960 MHz. The third radiating portion 22 has a first predetermined width W1 in the first direction, and the fourth radiating portion 23 has a second predetermined width W2 in the first direction, the first predetermined width W1 being smaller than the second predetermined width W2. The present invention enables a second coupling gap H2 between an open end 111 of the first radiating portion 11 and a side 231 of the fourth radiating portion 23 along a second direction by virtue of the design that the second predetermined width W2 of the fourth radiating portion 23 is greater than the first predetermined width W1 of the third radiating portion 22. The second direction is parallel to the X-axis direction, i.e. the first direction is perpendicular to the second direction. Thereby, the first radiating portion 11 and the fourth radiating portion 23 are separated from each other and coupled to each other to generate an operating frequency of about 4000 MHz. Preferably, the first coupling gap H1 and the second coupling gap H2 are smaller than 5mm.

In view of the foregoing, it should be noted that the third radiating portion 22 is not equal in length to the fourth radiating portion 23. Specifically, the third radiating portion 22 has a first predetermined length L1 in the second direction, and the fourth radiating portion 23 has a second predetermined length L2 in the second direction, and the first predetermined length L1 is greater than the second predetermined length L2.

With continued reference to fig. 2 and 3, the antenna module M may further include a proximity sensing circuit 4, an inductance element 5, a capacitance element 6, and a switching circuit 7. The proximity sensing circuit 4 is electrically connected to the second radiator 2. The connecting portion 21 includes a first arm 211 and a second arm 212. The inductance element 5 is connected in series between the first arm 211 and the proximity sensing circuit 4. The capacitive element 6 is connected in series between the first arm 211 and the second arm 212. The switching circuit 7 is electrically connected to the connection portion 21, that is, the switching circuit 7 is electrically connected between the second arm 212 and the control circuit 8. The present invention regards the second radiation element 2 as a sensing electrode (Sensor pad) by the arrangement of the proximity sensing circuit 4, so that the proximity sensing circuit 4 measures the distance between the object (e.g. the user's leg or other part) and the antenna module M. Therefore, the electronic device D can have a function of sensing whether the human body approaches the antenna module M, so as to adjust the radiation power of the antenna module M, and avoid the problem of excessively high specific absorption rate (Specific Absorption Rate, SAR) of the specific absorption rate of electromagnetic wave energy per unit mass of the living body.

Furthermore, the inductance element 5 can be used as a radio frequency choke (RF yoke) to avoid interference between the antenna structure formed by the first radiating element 1, the second radiating element 2 and the feeding element 3 and the proximity sensing circuit 4. The capacitor 6 can be used as a DC blocker (DC block) to prevent the DC signal generated by the proximity sensing circuit 4 from flowing into the system to affect or damage other components inside the electronic device D, and to prevent the DC signal generated by the proximity sensing circuit 4 from being directly grounded via the switching circuit 7. The capacitive element 6 can also adjust the impedance matching of the antenna module M.

Referring to fig. 5 and fig. 6, fig. 5 is a schematic diagram of a return loss when the antenna module of the present invention has only the first radiator, and fig. 6 is a schematic diagram of a return loss when the first radiator and the second radiator of the present invention are both connected. As can be seen from comparing fig. 5 and fig. 6, when the antenna module M has only the first radiator 1 (see fig. 5), it has the problem of insufficient bandwidth at both low frequency (617 MHz-960 MHz) and medium-high frequency (3000 MHz-6000 MHz). After the second radiator 2 is added, the antenna module M is coupled to each other by the first radiator 11 of the first radiator 1 and the third radiator 22 of the second radiator 2, and then coupled to the first coupling gap H1 and the second coupling gap H2, so as to properly increase the bandwidth in the low frequency range, and is coupled to each other by the first radiator 11 of the first radiator 1 and the fourth radiator 23 of the second radiator 2, so as to properly increase the bandwidth in the medium-high frequency range.

Referring to fig. 3 and fig. 4, fig. 4 is a schematic diagram of a second radiator and a switching circuit of the antenna module according to the present invention. The switching circuit 7 is a part of the multifunctional integrated module T, and the second radiating element 2 is electrically connected to one of the pins T1 of the integrated module T through the first arm 211, and then electrically connected to the proximity sensing circuit 4 through the pin T1. In addition, the second radiating element 2 is electrically connected to the other pin T2 of the integrated module T through the second arm 212, and then electrically connected to the switching circuit 7 through the pin T2. The switching circuit 7 includes a signal conducting path P and a plurality of grounding paths, and the grounding paths may be, for example, a first path P1, a second path P2 and a third path P3 in fig. 4. The first path P1, the second path P2 and the third path P3 are electrically connected to the signal conducting path P, but the number of the grounding paths is not limited in the present invention. The first path P1, the second path P2, and the third path P3 may be respectively connected in series with a first passive element E1, a second passive element E2, and a third passive element E3, and respectively connected in series with a first switch SW1, a second switch SW2, and a third switch SW3. For example, the first passive element E1, the second passive element E2, and the third passive element E3 can be inductors, capacitors, or resistors, which are not limited in the present invention. The electronic device D can adjust the operating frequency band, impedance matching, the value of return loss and/or radiation efficiency of the antenna module M by using the settings of the first passive element E1, the second passive element E2 and the third passive element E3.

With continued reference to fig. 4, in the present invention, the switching circuit 7 may include four operation modes, namely, a first mode, a second mode, a third mode and a fourth mode. The electronic device D may further comprise a control circuit 8. The control circuit 8 may control the switching circuit 7 to switch in one of a plurality of modes to adjust the operating frequency band of the antenna module M. Specifically, the first mode is that the second radiating element 2 is electrically connected to the control circuit 8 through the signal conducting path P, and the first to third switches SW1 to SW3 respectively located on the first to third paths P1 to P3 are in a non-conductive state, that is, the first mode can be regarded as a state in which the switching circuit 7 has not yet acted. The second mode is that the second radiating element 2 is grounded through the first path P1, at this time, the first switch SW1 located on the first path P1 is in a conductive state, and the second switch and the third switch SW2 and SW3 located on the second path and the third paths P2 and P3 respectively are in a non-conductive state. The third mode is that the second radiating element 2 is grounded through the second path P2, at this time, the second switch SW2 located on the second path P2 is in a conductive state, and the first switch and the third switch SW1 and SW3 located on the first path and the third paths P1 and P3 respectively are in a non-conductive state. The fourth mode is that the second radiating element 2 is grounded through the third path P3, and at this time, the third switch SW3 located on the third path P3 is in a conductive state, and the first and second switches SW1 and SW2 located on the first and second paths P1 and P2 respectively are in a non-conductive state. For example, when the switching circuit 7 is switched to a first mode, the antenna module M can generate a first operating frequency band, and when the switching circuit 7 is switched to a second mode, the antenna structure can generate a second operating frequency band, and the center frequency of the first operating frequency band generated by the first mode is different from the center frequency of the second operating frequency band generated by the second mode.

Further, referring to fig. 7 to 10, fig. 7 is a schematic diagram of a return loss of the antenna module in the first mode, fig. 8 is a schematic diagram of a return loss of the antenna module in the second mode, fig. 9 is a schematic diagram of a return loss of the antenna module in the third mode, and fig. 10 is a schematic diagram of a return loss of the antenna module in the fourth mode. As shown in fig. 7, in the first mode, the operating band generated by the antenna module M has a center frequency of 733MHz in the low frequency range. As shown in fig. 8, in the second mode, the operating band generated by the antenna module M has a center frequency of 871.5MHz in the low frequency range. As shown in fig. 9, in the third mode, the operating band generated by the antenna module M has a center frequency of 651MHz in the low frequency range. As shown in fig. 10, in the fourth mode, the operating band generated by the antenna module M has a center frequency of 678.5MHz in the low frequency range. Therefore, the present invention switches different paths (the signal conducting path P, the first path P1, the second path P2 and the third path P3) by the switching circuit 7, so as to adjust the center frequency of the operating band generated by the antenna module M, thereby achieving the effect of increasing the bandwidth.

The foregoing description is given by way of example of the low frequency range (617 MHz to 960 MHz). In practice, the present invention switches different paths (the signal conducting path P, the first path P1, the second path P2, and the third path P3) by the switching circuit 7, so that not only the bandwidth of the operating band generated by the antenna module M in the low frequency range can be increased, so that the operating band generated by the antenna module M can cover the range of 617MHz to 960MHz, but also the bandwidth of the operating band generated by the antenna module M in the middle-high frequency range can be further increased, so that the operating band generated by the antenna module M can cover the range of 3000MHz to 6000 MHz.

Advantageous effects of the embodiment

The invention has the beneficial effects that the antenna module M and the electronic device D provided by the invention can improve the bandwidth of the antenna module M in the low frequency range and the middle-high frequency range through the technical scheme of 'the second radiating element 2 and the first radiating part 11 are separated from each other and are mutually coupled', and 'the third radiating part 22 and the fourth radiating part 23 are not equal in length'.

Furthermore, the antenna module M is configured to appropriately increase the bandwidth of the low frequency range by coupling the first radiating portion 11 of the first radiating element 1 with the third radiating portion 22 of the second radiating element 2, and then by coupling the first coupling gap H1 with the second coupling gap H2, and to appropriately increase the bandwidth of the medium-high frequency range by coupling the first radiating portion 11 of the first radiating element 1 with the fourth radiating portion 23 of the second radiating element 2.

The invention can switch different paths (the signal conduction path P, the first path P1, the second path P2 and the third path P3) through the switching circuit 7, so that the bandwidth of the operation frequency band generated by the antenna module M in a low frequency range can be increased, the operation frequency band generated by the antenna module M can cover the range of 617 MHz-960 MHz, the bandwidth of the operation frequency band generated by the antenna module M in a middle-high frequency range can be further increased, and the operation frequency band generated by the antenna module M can cover the range of 3000 MHz-6000 MHz.

The above disclosure is only a preferred embodiment of the present invention and is not intended to limit the scope of the claims, so that all equivalent technical variations made by the present description and drawings are included in the scope of the claims.

Claims (18)

1. An antenna module, the antenna module comprising:

the first radiation piece comprises a first radiation part, a second radiation part and a feed-in part, wherein the feed-in part is connected between the first radiation part and the second radiation part, and the length of the first radiation part is longer than that of the second radiation part;

the second radiation piece is separated from the first radiation part and coupled with the first radiation part, and comprises a connecting part, a third radiation part and a fourth radiation part, wherein the connecting part is connected between the third radiation part and the fourth radiation part, and the third radiation part and the fourth radiation part are not equal in length; and

the feed-in piece is connected to the feed-in part and is used for feeding in a signal.

2. The antenna module of claim 1, wherein a first coupling gap is provided between the first radiating portion and the third radiating portion along a first direction, and a second coupling gap is provided between an open end of the first radiating portion and the fourth radiating portion along a second direction, the first direction being perpendicular to the second direction.

3. The antenna module of claim 2, wherein the first coupling gap and the second coupling gap are both less than 5mm.

4. The antenna module of claim 2, wherein the third radiating portion has a first predetermined width in the first direction and the fourth radiating portion has a second predetermined width in the first direction, the first predetermined width being smaller than the second predetermined width.

5. The antenna module of claim 2, wherein the third radiating portion has a first predetermined length in the second direction and the fourth radiating portion has a second predetermined length in the second direction, the first predetermined length being greater than the second predetermined length.

6. The antenna module of claim 1, wherein the first radiating element is a monopole antenna or a planar inverted-F antenna.

7. The antenna module of claim 1, further comprising a proximity sensing circuit electrically connected to the second radiating element, an inductive element serially connected between the first arm and the proximity sensing circuit, and a capacitive element serially connected between the first arm and the second arm.

8. The antenna module of claim 1, further comprising a switching circuit electrically connected to the connection portion, wherein the antenna module is capable of generating a first operating frequency band when the switching circuit is switched to a first mode, and is capable of generating a second operating frequency band when the switching circuit is switched to a second mode, and a center frequency of the first operating frequency band generated by the first mode is different from a center frequency of the second operating frequency band generated by the second mode.

9. An electronic device, the electronic device comprising:

a housing; and

an antenna module disposed in the housing, the antenna module comprising:

the first radiation piece comprises a first radiation part, a second radiation part and a feed-in part, wherein the feed-in part is connected between the first radiation part and the second radiation part, and the length of the first radiation part is longer than that of the second radiation part;

the second radiation piece is separated from the first radiation part and coupled with the first radiation part, and comprises a connecting part, a third radiation part and a fourth radiation part, wherein the connecting part is connected between the third radiation part and the fourth radiation part, and the third radiation part and the fourth radiation part are not equal in length; and

the feed-in piece is connected to the feed-in part and is used for feeding in a signal.

10. The electronic device of claim 9, wherein a first coupling gap is provided between the first radiating portion and the third radiating portion along a first direction, and a second coupling gap is provided between an open end of the first radiating portion and the fourth radiating portion along a second direction, the first direction being perpendicular to the second direction.

11. The electronic device of claim 10, wherein the first coupling gap and the second coupling gap are both less than 5mm.

12. The electronic device of claim 10, wherein the third radiating portion has a first predetermined width in the first direction and the fourth radiating portion has a second predetermined width in the first direction, the first predetermined width being smaller than the second predetermined width.

13. The electronic device of claim 10, wherein the third radiating portion has a first predetermined length in the second direction, and the fourth radiating portion has a second predetermined length in the second direction, the first predetermined length being greater than the second predetermined length.

14. The electronic device of claim 10, wherein the first radiating portion has a first side parallel to the second direction, and the fourth radiating portion has a second side parallel to the second direction, the first side being flush with the second side.

15. The electronic device of claim 9, wherein the first radiating element is a monopole antenna or a planar inverted-F antenna.

16. The electronic device of claim 9, further comprising a proximity sensing circuit electrically connected to the second radiating element, an inductance element connected in series between the first arm and the proximity sensing circuit, and a capacitance element connected in series between the first arm and the second arm.

17. The electronic device of claim 9, further comprising a switching circuit electrically connected to the connection portion, wherein the antenna module is capable of generating a first operating frequency band when the switching circuit is switched to a first mode, and is capable of generating a second operating frequency band when the switching circuit is switched to a second mode, and a center frequency of the first operating frequency band generated by the first mode is different from a center frequency of the second operating frequency band generated by the second mode.

18. The electronic device of claim 17, further comprising a control circuit electrically connected to the switching circuit, the control circuit configured to control the switching circuit to switch between one of the first mode and the second mode.