An antenna assembly and a microphone

Abstract

This invention discloses an antenna assembly and a microphone. The antenna assembly includes a main board, an antenna, and a radio frequency (RF) front-end. The main board includes a clearance area and a non-clearance area adjacent to the clearance area. A signal feed point is provided on the clearance area, and a short-circuit point is provided on the non-clearance area. The RF front-end is electrically connected to the signal feed point. The antenna includes a feed branch, an open-circuit branch, a loop branch, and a short-circuit branch. One end of the feed branch is connected to one end of the open-circuit branch and one end of the loop branch, and the other end of the loop branch is connected to one end of the short-circuit branch. The feed branch is electrically connected to the signal feed point, and the short-circuit branch is electrically connected to the short-circuit point. This invention divides the main board into a clearance area and a non-clearance area, sets a signal feed point in the clearance area and a short-circuit point in the non-clearance area, and designs the antenna structure to reduce interference from different hand gestures or other signals during the use of the antenna assembly, thereby improving the ease of use of the antenna assembly.

Description

Technical Field

[0001] This invention relates to the field of antenna assembly design technology, and more particularly to an antenna assembly and a microphone. Background Technology

[0002] With the increasing use of wireless microphones and user interaction, handheld microphone use is becoming a trend, presenting new challenges for antenna design for different handheld postures.

[0003] Currently, in existing technologies, the antenna design of wireless microphones mainly uses a handheld transceiver controller to control the microphone signal. However, there are problems such as the handheld posture affecting the microphone antenna signal and interference during use. Summary of the Invention

[0004] This invention provides an antenna assembly and a microphone that solves the problem of different hand-holding postures affecting the antenna assembly signal, reduces interference from other signals to the antenna assembly, and improves the user experience.

[0005] In a first aspect, embodiments of the present invention provide an antenna assembly, including: a main board, an antenna, and a radio frequency (RF) front-end; wherein, the main board includes a clearance area and a non-clearance area adjacent to the clearance area, a signal feed point is provided on the clearance area, and a short-circuit point is provided on the non-clearance area; the RF front-end is electrically connected to the signal feed point; the antenna includes a feed branch, an open-circuit branch, a loop branch, and a short-circuit branch, one end of the feed branch is connected to one end of the open-circuit branch and one end of the loop branch respectively, and the other end of the loop branch is connected to one end of the short-circuit branch; the feed branch is electrically connected to the signal feed point, and the short-circuit branch is electrically connected to the short-circuit point.

[0006] Optionally, the motherboard is rectangular, with the clearance area located on either of the shorter sides of the rectangle.

[0007] Optionally, the distance from the signal feed point to any long side of the rectangle is equal to 1 / 3D1-1 / 2D1; the distance from the short-circuit point to any short side of the rectangle is equal to 1 / 3D2-1 / 2D2; where D1 is the length of the short side of the rectangle and D2 is the length of the long side of the rectangle.

[0008] Optionally, the clearance area is a non-copper-paved area, used to reduce the capacitance effect between the antenna and the non-clearance area and improve the antenna's radiation impedance.

[0009] Optionally, the open-circuit branch includes a first open-circuit sub-branch, a second open-circuit sub-branch, and a third open-circuit sub-branch; the loop branch includes a first loop sub-branch, a second loop sub-branch, and a third loop sub-branch; one end of the first open-circuit sub-branch is connected to one end of the power supply branch, the other end of the first open-circuit sub-branch is connected to one end of the second open-circuit branch, and the other end of the second open-circuit sub-branch is connected to one end of the third open-circuit branch; one end of the first loop sub-branch is connected to one end of the power supply branch, the other end of the first loop sub-branch is connected to one end of the second loop sub-branch, and the other end of the second loop sub-branch is connected to one end of the third loop sub-branch.

[0010] Optionally, there is a first gap between the second loop sub-branch and the power supply branch; a second gap between the second open-circuit sub-branch and the power supply branch; a third gap between the short-circuit branch and the third loop sub-branch; and a fourth gap between the short-circuit branch and the third open-circuit branch.

[0011] Optionally, when the antenna assembly is in operation, it forms a path signal stream, which includes a first path signal stream, a second path signal stream, and a third path signal stream.

[0012] Optionally, the first path signal flow is a signal flow that starts from the signal feed point and passes through the first open-path sub-branch, the second open-path sub-branch, and the third open-path sub-branch in sequence; the second path signal flow is a signal flow that starts from the short-circuit point and passes through the short-circuit branch; and the third path signal flow is a signal flow that starts from the signal feed point and passes through the first loop sub-branch, the second loop sub-branch, and the third loop sub-branch in sequence.

[0013] Optionally, the motherboard may also include at least one of the following: buttons, a Universal Serial Bus (USB), a battery, a display unit, and a transceiver chip.

[0014] Secondly, embodiments of the present invention also provide a microphone, including an antenna assembly as described in any embodiment of the present invention.

[0015] The technical solution of this invention is an antenna assembly, including: a main board, an antenna, and a radio frequency (RF) front-end. The main board includes a clearance area and a non-clearance area adjacent to the clearance area. A signal feed point is provided on the clearance area, and a short-circuit point is provided on the non-clearance area. The RF front-end is electrically connected to the signal feed point. The antenna includes a feed branch, an open-circuit branch, a loop branch, and a short-circuit branch. One end of the feed branch is connected to one end of the open-circuit branch and one end of the loop branch, respectively, and the other end of the loop branch is connected to one end of the short-circuit branch. The feed branch is electrically connected to the signal feed point, and the short-circuit branch is electrically connected to the short-circuit point. Based on the above embodiment, by dividing the main board into a clearance area and a non-clearance area, providing a signal feed point in the clearance area, providing a short-circuit point in the non-clearance area, and designing the antenna structure, interference from different hand gestures or other signals to the antenna assembly is reduced during use, improving the ease of use of the antenna assembly.

[0016] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of an antenna assembly provided in an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of an antenna assembly motherboard provided in an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of an antenna assembly provided in an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of an antenna assembly gap provided in an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the signal flow structure of an antenna assembly provided in an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of an antenna component frequency design provided in an embodiment of the present invention;

[0024] Figure 7This is a Smith chart of an antenna assembly provided in an embodiment of the present invention;

[0025] Figure 8 This is a schematic diagram of a first gesture posture provided in an embodiment of the present invention;

[0026] Figure 9 This is a schematic diagram of a second gesture posture provided in an embodiment of the present invention;

[0027] Figure 10 This is a schematic diagram of a third gesture posture provided in an embodiment of the present invention;

[0028] Figure 11 This is a schematic diagram of a fourth gesture posture provided in an embodiment of the present invention;

[0029] Figure 12 This is a schematic diagram of the S-parameter results of four hand gestures provided in the embodiments of the present invention;

[0030] Figure 13 These are the four hand gesture postures Smith charts provided in the embodiments of the present invention. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0032] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, system, product, or device that comprises a series of steps or units is not necessarily limited to those explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, systems, products, or devices.

[0033] Figure 1 This is a schematic diagram of an antenna assembly provided in an embodiment of the present invention. This embodiment is applicable to situations where different hand gestures or other signals interfere with the antenna assembly. Figure 1As shown, the antenna assembly 10 of this embodiment includes a motherboard 110, an antenna 120, and a radio frequency front end 130.

[0034] in, Figure 2 This is a schematic diagram of the structure of an antenna assembly motherboard provided in an embodiment of the present invention, such as... Figure 2 As shown, the motherboard 110 includes a clearance area 1101 and a non-clearance area 1102 adjacent to the clearance area 1101. A signal feed point 11011 is provided on the clearance area 1101, and a short circuit point 11021 is provided on the non-clearance area 1102.

[0035] Optionally, the motherboard 110 is rectangular, and the clearance area 1101 is located on any short side of the motherboard rectangle. The matrix of the motherboard 110 can be a regular rectangle, a rectangle-like shape, etc., and this embodiment does not limit this.

[0036] Specifically, clearance area 1101 is a non-copper-paved area, used to reduce the capacitance effect between the antenna and the non-clearance area, and improve the antenna's radiation impedance. Non-clearance area 1102 is a copper-paved area.

[0037] in, Figure 3 This is a schematic diagram of the structure of an antenna assembly provided in an embodiment of the present invention, such as... Figure 3 As shown, antenna 120 includes a feed branch 1201, an open-circuit branch 1202, a loop branch 1203, and a short-circuit branch 1204. One end of the feed branch 1201 is connected to one end of the open-circuit branch 1202 and one end of the loop branch 1203, respectively. The other end of the loop branch 1203 is connected to one end of the short-circuit branch 1204. The feed branch 1201 is electrically connected to the signal feed point 11011, and the short-circuit branch 1204 is electrically connected to the short-circuit point 11021.

[0038] Specifically, open-circuit branch 1202 includes a first open-circuit sub-branch 12021, a second open-circuit sub-branch 12022, and a third open-circuit sub-branch 12023; loop branch 1203 includes a first loop sub-branch 12031, a second loop sub-branch 12032, and a third loop sub-branch 12033; one end of the first open-circuit sub-branch 12021 is connected to one end of the power supply branch 1201, the other end of the first open-circuit sub-branch 12021 is connected to one end of the second open-circuit branch 12022, and the other end of the second open-circuit sub-branch 12022 is connected to one end of the third open-circuit branch 12023; one end of the first loop sub-branch 12031 is connected to one end of the power supply branch 1201, the other end of the first loop sub-branch 12031 is connected to one end of the second loop sub-branch 12032, and the other end of the second loop sub-branch 12032 is connected to one end of the third loop sub-branch 12033.

[0039] Furthermore, Figure 4This is a schematic diagram of the structure of an antenna assembly gap provided in an embodiment of the present invention, such as... Figure 4 As shown, there is a first gap between the second loop sub-branch 12032 and the power supply branch 1201; there is a second gap between the second open-circuit sub-branch 12022 and the power supply branch 1201; there is a third gap between the short-circuit branch 1204 and the third loop sub-branch 12033; and there is a fourth gap between the short-circuit branch 1204 and the third open-circuit sub-branch 12023.

[0040] The RF front-end 130 is electrically connected to the signal feed point 11011, and the signal feed point 11011 is located on the short side of the motherboard 110. The short circuit point 11021 is located on the long side of the motherboard 110. Furthermore, the distance from the signal feed point 11011 to any long side of the rectangle of the motherboard 110 is equal to 1 / 3D1-1 / 2D1; the distance from the short circuit point 11021 to any short side of the rectangle of the motherboard 110 is equal to 1 / 3D2-1 / 2D2; where D1 is the length of the short side of the rectangle and D2 is the length of the long side of the rectangle.

[0041] Specifically, during the operation of antenna assembly 10, a path signal flow is formed. Figure 5 This is a schematic diagram of the signal flow structure of an antenna component provided in an embodiment of the present invention, such as... Figure 5 As shown, the path signal flow includes a first path signal flow 1401, a second path signal flow 1402, and a third path signal flow 1403. Further, the first path signal flow 1401 originates from the signal feed point 11011 and sequentially passes through the first open-path sub-branch 12021, the second open-path sub-branch 12022, and the third open-path sub-branch 12023; the second path signal flow 1402 originates from the short-circuit point 11021 and passes through the short-circuit branch 1204; the third path signal flow 1403 originates from the signal feed point 11011 and sequentially passes through the first loop sub-branch 12031, the second loop sub-branch 12032, and the third loop sub-branch 12033.

[0042] Based on the above embodiments, optionally, the antenna 120 is a flexible printed circuit board (FPC) antenna, which can be implemented as needed by laser-direct structuring (LDS), stamping, etc., with the signal feed point 11011 and short-circuit point being a spring pin or spring sheet of a certain height. The designer can choose between the height of the POGO pin or spring sheet and the size of the clearance area 1101 of the antenna. For example, if the product size is small, the height is preferred, and if the motherboard area is large, the area of ​​the clearance area 1101 can be increased. This embodiment does not limit this.

[0043] Based on the above embodiments, the branch length and width of antenna 120 need to be adjusted according to actual conditions, and in this application, they need to meet the following requirements: Figure 5 The relative positions and directions are shown.

[0044] Furthermore, Figure 6 This is a schematic diagram of an antenna component frequency design provided in an embodiment of the present invention, such as... Figure 6 As shown, f1 is a parallel resonance formed through the first path signal stream 1401, f3 is a parallel resonance formed through the second path signal stream 1402, and f2 is a series resonance formed through the third path signal stream 1403. A free-space resonance with a frequency of 2.4 GHz is set between f2 and f3. The S-parameters are then tested. Figure 6 As can be seen from this, the antenna assembly structure designed in this embodiment excites three radiation modes, and the coupling between the three radiation modes is impedance-adaptive. Figure 7 This is a Smith chart of an antenna assembly provided in an embodiment of the present invention, such as... Figure 7 As shown, Figure 7 Smith diagram and Figure 6 The S-parameters in the diagram correspond one-to-one. The parallel resonances f1 and f3 are shown as overlapping on the Smith chart, with the impedance being higher than that of f2 on the left. The series resonance of f2 crosses the boundary line between the upper and lower planes.

[0045] Based on the above embodiments, the motherboard 110 is also provided with at least one of the following: buttons, a universal serial bus (USB), a battery, a display unit, and a transceiver chip. This embodiment does not limit this.

[0046] Furthermore, the feed point 11011 is located on the short side of the motherboard 110, and the short-circuit point 11021 is located on the long side of the motherboard 110, which allows for impedance adaptation for the long-side radiation mode, short-side radiation mode, and diagonal radiation mode of the motherboard 110. The three modes of the motherboard 110, combined with the three modes of the antenna 120, enable full-mode matching and adaptive operation.

[0047] Based on the above embodiments, this embodiment also provides a microphone, including an antenna assembly as described in any embodiment of the present invention.

[0048] Furthermore, when the antenna assembly is applied to the microphone, the signal characteristics covering different locations of the microphone are determined by testing typical hand gestures. Figure 8 This is a schematic diagram of a first gesture posture provided in an embodiment of the present invention; Figure 9 This is a schematic diagram of a second gesture posture provided in an embodiment of the present invention; Figure 10 This is a schematic diagram of a third gesture posture provided in an embodiment of the present invention; Figure 11 This is a schematic diagram of a fourth gesture posture provided in an embodiment of the present invention; Figure 12 This is a schematic diagram of the S-parameter results of four hand gestures provided in the embodiments of the present invention, such as... Figure 12 As shown, the parameters of the four different gesture postures have bandwidth, and are all close to those when no gesture is present. Figure 6 The S-parameters of the species change, therefore, hand gestures do not affect the signal of the antenna or microphone during the use of the antenna assembly or microphone; Figure 13 These are the four hand gesture Smith charts provided in this embodiment of the invention, such as... Figure 13 As shown, the Smith loop shows a contraction trend, and the impedances of both parallel and series resonances approach the impedance of a 50-ohm system. Therefore, the antenna assembly and microphone proposed in this application have the advantages of multiple modes and impedance self-adaptation, avoiding interference from various handheld postures and broadening the ease of use of wireless microphones.

[0049] The technical solution of this invention provides an antenna assembly, including: a main board, an antenna, and a radio frequency (RF) front-end. The main board includes a clearance area and a non-clearance area adjacent to the clearance area. A signal feed point is provided on the clearance area, and a short-circuit point is provided on the non-clearance area. The RF front-end is electrically connected to the signal feed point. The antenna includes a feed branch, an open-circuit branch, a loop branch, and a short-circuit branch. One end of the feed branch is connected to one end of the open-circuit branch and one end of the loop branch, and the other end of the loop branch is connected to one end of the short-circuit branch. The feed branch is electrically connected to the signal feed point, and the short-circuit branch is electrically connected to the short-circuit point. Based on the above embodiment, by dividing the main board into a clearance area and a non-clearance area, providing a signal feed point in the clearance area, and providing a short-circuit point in the non-clearance area, and designing the antenna structure, interference from different hand gestures or other signals to the antenna assembly is reduced during use, improving the ease of use of the antenna assembly.

[0050] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. An antenna assembly, characterized in that, include: Motherboard, antenna, and RF front-end; among which, The motherboard includes a clearance area and a non-clearance area adjacent to the clearance area. A signal feed point is provided on the clearance area, and a short circuit point is provided on the non-clearance area. The radio frequency front end is electrically connected to the signal feed point. The antenna includes a feed branch, an open-circuit branch, a loop branch, and a short-circuit branch. One end of the feed branch is connected to one end of the open-circuit branch and one end of the loop branch, respectively, and the other end of the loop branch is connected to one end of the short-circuit branch. The feed branch is electrically connected to the signal feed point, and the short-circuit branch is electrically connected to the short-circuit point. The open-path branch includes a first open-path sub-branch, a second open-path sub-branch, and a third open-path sub-branch; the loop branch includes a first loop sub-branch, a second loop sub-branch, and a third loop sub-branch; One end of the first open-circuit sub-branch is connected to one end of the power supply branch, the other end of the first open-circuit sub-branch is connected to one end of the second open-circuit sub-branch, and the other end of the second open-circuit sub-branch is connected to one end of the third open-circuit sub-branch. One end of the first loop sub-branch is connected to one end of the power supply branch, the other end of the first loop sub-branch is connected to one end of the second loop sub-branch, and the other end of the second loop sub-branch is connected to one end of the third loop sub-branch. There is a first gap between the second loop sub-branch and the power supply branch; there is a second gap between the second open circuit sub-branch and the power supply branch; there is a third gap between the short circuit branch and the third loop sub-branch; and there is a fourth gap between the short circuit branch and the third open circuit branch.

2. The antenna assembly according to claim 1, characterized in that, The motherboard is rectangular, and the clearance area is located on either of the shorter sides of the rectangle.

3. The antenna assembly according to claim 2, characterized in that, The distance from the signal feed point to any long side of the rectangle is equal to 1 / 3D1 - 1 / 2D1; the distance from the short-circuit point to any short side of the rectangle is equal to 1 / 3D2 - 1 / 2D2. Wherein, D1 is the length of the shorter side of the rectangle, and D2 is the length of the longer side of the rectangle.

4. The antenna assembly according to claim 1, characterized in that, The clearance area is a non-copper-paved area, used to reduce the capacitance effect between the antenna and the non-clearance area, and improve the radiation impedance of the antenna.

5. The antenna assembly according to claim 1, characterized in that, When the antenna assembly is in operation, it forms a path signal stream, which includes a first path signal stream, a second path signal stream, and a third path signal stream.

6. The antenna assembly according to claim 5, characterized in that, The first path signal flow is a signal flow that starts from the signal feed point and passes through the first open-path sub-branch, the second open-path sub-branch, and the third open-path sub-branch in sequence; The second path signal flow is the signal flow that originates from the short-circuit point and passes through the short-circuit branch; The third path signal flow is a signal flow that starts from the signal feed point and passes through the first loop sub-branch, the second loop sub-branch, and the third loop sub-branch in sequence.

7. The antenna assembly according to claim 1, characterized in that, The motherboard also includes at least one of the following: buttons, a Universal Serial Bus (USB), a battery, a display unit, and a transceiver chip.

8. A microphone, characterized in that, Includes the antenna assembly as described in any one of claims 1-7.

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