FPC antenna, circuit board and wireless microphone
By designing the connection and radiation section structure of the FPC antenna, the signal radiation and reception capabilities of the wireless microphone are enhanced, the problem of insufficient antenna performance is solved, and efficient and stable audio data transmission and strong anti-interference ability are achieved.
Patent Information
- Application Number
- CN202422138524.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-08-30
AI Technical Summary
The antenna performance of existing wireless microphones is insufficient, resulting in unstable audio data transmission and weak anti-interference ability.
An FPC antenna is designed, including a connecting section, a feeding section and a radiation section. The radiation section is composed of multiple sub-segments. By setting the relative positions of the feeding section and the radiation section, an electromagnetic coupling is formed to enhance the signal radiation and reception capacity.
It improves the radiation efficiency and gain of the antenna, ensures stable and clear audio data transmission, and significantly improves anti-interference ability.
Smart Images
Figure CN223093116U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wireless microphones, in particular to an FPC antenna, a circuit board and a wireless microphone. Background Art
[0002] A wireless microphone, such as a wireless desktop microphone, is a portable microphone device that can be wirelessly connected to a computer or other devices, enabling the user to move freely within a certain range without being restricted by cables. Such microphones are widely used in various occasions, such as live streaming, online courses, meetings, music production, etc.
[0003] The wireless microphone easily realizes wireless connection with the receiving device through an internal antenna by means of Bluetooth connection, freeing the user from the bondage of wires and enjoying a more free audio experience. The performance of the antenna directly determines the quality of the wireless connection. Therefore, it is particularly important for a wireless microphone whether the antenna can ensure stable, clear audio data transmission during the process and has strong anti-interference ability. Summary of the Utility Model
[0004] An embodiment of the utility model provides an FPC antenna, a circuit board and a wireless microphone, which can ensure stable, clear audio data transmission during the process and have strong anti-interference ability.
[0005] The utility model discloses an FPC antenna, which includes a connection section, a feed section and a radiation section; the radiation section includes a first sub-section, a second sub-section, a third sub-section, a fourth sub-section and a fifth sub-section connected in sequence;
[0006] A ground connection point and a feed point are arranged on the connection section. The ground connection point is used to connect to the ground on the circuit board, and the feed point is used to connect to the feed point on the circuit board; the feed section is connected to one end of the connection section, and the feed section is arranged opposite to the radiation section;
[0007] The first sub-section is connected to the other end of the connection section and is arranged opposite to the feed section; the second sub-section extends in a direction away from the feed section; the third sub-section is arranged opposite to the feed section; the fourth sub-section extends in a direction close to the feed section; the fifth sub-section is arranged opposite to the feed section and extends in a direction close to the second sub-section.
[0008] Optionally, the connection section is used to be arranged on the circuit board; at least part of the feed section and the first sub-section are used to be arranged outside the circuit board; the second sub-section, the third sub-section, the fourth sub-section and the fifth sub-section are used to be arranged outside the circuit board.
[0009] Optionally, a windowing area is formed on the connection section, the ground connection point and the feed point are located in the windowing area, and a gold plating layer is covered at the windowing area.
[0010] Optionally, the first sub-section, the third sub-section and the fifth sub-section are all arranged parallel to the feed section.
[0011] Optionally, the second sub-segment is vertically arranged with respect to the first sub-segment, and the fourth sub-segment is vertically arranged with respect to the fifth sub-segment.
[0012] Optionally, the length of the feeding section is 12 mm to 14 mm, the length of the first sub-segment is 6.5 mm to 7.5 mm, the length of the second sub-segment is 4.5 mm to 5.5 mm, the length of the third sub-segment is 8.5 mm to 9.5 mm, the length of the fourth sub-segment is 4 mm to 4.5 mm, and the length of the fifth sub-segment is 4.5 mm to 5.5 mm.
[0013] Optionally, the grounding point and the feeding point are round holes, and the diameters of the grounding point and the feeding point are 0.5 mm to 1 mm; the windowing area is rectangular, with a length of 2 mm to 2.5 mm and a width of 1 mm to 2 mm.
[0014] The present utility model also discloses a circuit board, which includes a board body and the above-mentioned antenna; the grounding point and the feeding point are respectively welded to the ground and the feeding point on the board body.
[0015] Optionally, the connecting section is located on the circuit board; at least part of the feeding section and the first sub-segment are located outside the circuit board; the second sub-segment, the third sub-segment, the fourth sub-segment, and the fifth sub-segment are located outside the circuit board.
[0016] The present utility model also discloses a wireless microphone, which includes the above-mentioned antenna or the above-mentioned circuit board.
[0017] Compared with the prior art, the beneficial effects of the FPC antenna provided by the embodiments of the present utility model are as follows: the FPC antenna of the present utility model is provided with a feeding section and a radiation section, and the radiation section includes a first sub-segment, a second sub-segment, a third sub-segment, a fourth sub-segment, and a fifth sub-segment that are connected in sequence. After the first sub-segment is connected to the connecting section, it is arranged opposite to the feeding section. The second sub-segment extends in a direction away from the feeding section. The third sub-segment is arranged opposite to the feeding section. The fourth sub-segment extends in a direction close to the feeding section. The fifth sub-segment is arranged opposite to the feeding section and extends in a direction close to the second sub-segment. Such an FPC antenna enables the first sub-segment, the second sub-segment, the third sub-segment, the fourth sub-segment, and the fifth sub-segment to all serve as the main bodies of signal radiation. The radiation plane of the FPC antenna is large, increasing the radiation efficiency of the antenna. At the same time, the feeding section and the radiation section are arranged opposite to each other, forming electromagnetic coupling with the radiation section, which can reflect and guide electromagnetic waves, improving the directivity and gain of the FPC antenna. Thus, it helps the FPC antenna to achieve signal radiation and reception, contributing to enhancing the radiation ability of the FPC antenna. Finally, the FPC antenna has the advantages of high efficiency, high gain, and omnidirectionality, and its performance is sufficient to ensure the stability and clarity of audio data during transmission, greatly improving the anti-interference ability of the product. Description of the Drawings
[0018] The technical solution of the present utility model will be further described in detail below in conjunction with the drawings and embodiments. In the drawings:
[0019] Figure 1 is a schematic diagram of the FPC antenna according to an embodiment of the present utility model;
[0020] Figure 2 is a schematic diagram of the circuit board according to an embodiment of the present utility model;
[0021] Figure 3 is the H-plane radiation pattern of the antenna according to an embodiment of the present utility model at the 2400 MHz frequency point;
[0022] Figure 4 is the H-plane radiation pattern of the antenna according to an embodiment of the present utility model at the 2440 MHz frequency point;
[0023] Figure 5 is the H-plane radiation pattern of the antenna according to an embodiment of the present utility model at the 2480 MHz frequency point.
[0024] The reference numerals in the figures are as follows:
[0025] 1. Circuit board; 11. FPC antenna; 111. Connection section; 111a. Grounding point; 111b. Feeding point; 111c. Windowing area; 112. Feeding section; 113. Radiation section; 113a. First sub-section; 113b. Second sub-section; 113c. Third sub-section; 113d. Fourth sub-section; 113e. Fifth sub-section; 12. Plate body. Detailed implementation manners
[0026] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. Now, in conjunction with the drawings, the preferred embodiments of the present utility model will be described in detail.
[0027] An embodiment of the present utility model provides an FPC antenna 11. As shown in Figure 1 and Figure 2 , the FPC antenna 11 includes a connection section 111, a feeding section 112 and a radiation section 113; the radiation section 113 includes a first sub-section 113a, a second sub-section 113b, a third sub-section 113c, a fourth sub-section 113d and a fifth sub-section 113e connected in sequence. A grounding point 111a and a feeding point 111b are arranged on the connection section 111. The grounding point 111a is used to connect to the ground on the circuit board 1, and the feeding point 111b is used to connect to the feeding point 111b on the circuit board 1; the feeding section 112 is connected to one end of the connection section 111, and the feeding section 112 is disposed opposite to the radiation section 113.
[0028] The first sub-segment 113a is connected to the other end of the connection segment 111 and is disposed opposite to the feed ground segment 112; the second sub-segment 113b extends in a direction away from the feed ground segment 112; the third sub-segment 113c is disposed opposite to the feed ground segment 112; the fourth sub-segment 113d extends in a direction close to the feed ground segment 112; the fifth sub-segment 113e is disposed opposite to the feed ground segment 112 and extends in a direction close to the second sub-segment 113b.
[0029] The FPC antenna 11 of the present utility model is provided with a feed ground segment 112 and a radiation segment 113. The radiation segment 113 includes a first sub-segment 113a, a second sub-segment 113b, a third sub-segment 113c, a fourth sub-segment 113d, and a fifth sub-segment 113e that are connected in sequence. After the first sub-segment 113a is connected to the connection segment 111, it is disposed opposite to the feed ground segment 112. The second sub-segment 113b extends in a direction away from the feed ground segment 112. The third sub-segment 113c is disposed opposite to the feed ground segment 112. The fourth sub-segment 113d extends in a direction close to the feed ground segment 112. The fifth sub-segment 113e is disposed opposite to the feed ground segment 112 and extends in a direction close to the second sub-segment 113b. Such an FPC antenna 11 makes the first sub-segment 113a, the second sub-segment 113b, the third sub-segment 113c, the fourth sub-segment 113d, and the fifth sub-segment 113e all serve as the main body of signal radiation. The radiation plane of the FPC antenna 11 is large, increasing the radiation efficiency of the antenna. At the same time, the feed ground segment 112 and the radiation segment 113 are disposed opposite to each other, forming electromagnetic coupling with the radiation segment 113, which can reflect and guide electromagnetic waves, improving the directivity and gain of the FPC antenna 11, thereby helping the FPC antenna 11 to achieve signal radiation and reception, contributing to enhancing the radiation ability of the FPC antenna 11. Finally, the FPC antenna 11 has the advantages of high efficiency, high gain, and omnidirectionality, and its performance is sufficient to ensure the stability and clarity of audio data during transmission, greatly improving the anti-interference ability of the product.
[0030] Specifically, the FPC antenna 11 can be applied to a wireless microphone. When the FPC antenna 11 is applied, the grounding point 111a is soldered to the ground (GND) on the circuit board 1, and the feeding point 111b is soldered to the feeding point 111b on the circuit board 1. The grounding point 111a ensures the electrical connection and signal transmission of the antenna, and the feeding point 111b serves as the connection point for the main board signal to be output to the antenna. The FPC (Flexible Printed Circuit) antenna of the present utility model, that is, a flexible printed circuit antenna, is a printed circuit antenna made of a flexible material.
[0031] The FPC antenna 11 of the present utility model can generate resonance at 2.402 GHz to 2.483 GHz.
[0032] Further, the connecting section 111 is configured to be disposed on the circuit board 1; at least part of the feeding section 112 and the first sub-section 113a are configured to be disposed outside the circuit board 1; the second sub-section 113b, the third sub-section 113c, the fourth sub-section 113d and the fifth sub-section 113e are configured to be disposed outside the circuit board 1. When the FPC antenna 11 is applied, the connecting section 111 is disposed on the circuit board 1; at least part of the feeding section 112 and the first sub-section 113a are disposed outside the circuit board 1; the second sub-section 113b, the third sub-section 113c, the fourth sub-section 113d and the fifth sub-section 113e are disposed outside the circuit board 1. Under the condition of ensuring the normal electrical connection between the FPC antenna 11 and the circuit board 1, the net space area of the circuit board 1 can be utilized to a greater extent, the setting of the FPC can be maximized, and the signal radiation efficiency can be improved. At the same time, since at least part of the feeding section 112 and the first sub-section 113a are outside the circuit board 1, and the second sub-section 113b, the third sub-section 113c, the fourth sub-section 113d and the fifth sub-section 113e are outside the circuit board 1, there is a certain distance from the circuit board 1, and the electromagnetic interference on the circuit board 1 can be avoided, so as not to affect the signal radiation efficiency of the FPC antenna 11.
[0033] Further, an opening area 111c is formed on the connecting section 111, the grounding point 111a and the feeding point 111b are located in the opening area 111c, and a gold plating layer is covered at the opening area 111c. Forming the opening area 111c by opening a window on the connecting section 111 is to remove the covering material of the FPC antenna 11, such as polyimide (PI) or other types of insulating layers, to expose the conductive layer (such as copper wire), which is used as the grounding point 111a and the feeding point 111b here, facilitating welding with the circuit board 1 and realizing the electrical connection with the circuit board 1. Further, covering a gold plating layer at the opening area 111c can prevent the conductive layer exposed at the opening area 111c from being oxidized, affecting the antenna conduction performance. Specifically, the gold plating layer is formed by an immersion gold treatment process. The immersion gold treatment process is a surface treatment process, and a layer of gold is deposited on the copper surface through a chemical reaction to prevent copper oxidation, enhance its conductivity and solderability. The immersion gold treatment process is a conventional technology and will not be specifically described here.
[0034] Further, for the specific setting of each part of the radiation section 113, in one embodiment, the first sub-section 113a, the third sub-section 113c and the fifth sub-section 113e are all arranged in parallel with the feeding section 112, the second sub-section 113b is arranged perpendicular to the first sub-section 113a, and the fourth sub-section 113d is arranged perpendicular to the fifth sub-section 113e.
[0035] Furthermore, the length L1 of the feeding section 112 is 12 mm to 14 mm, the length L2 of the first sub-section 113a is 6.5 mm to 7.5 mm, the length L3 of the second sub-section 113b is 4.5 mm to 5.5 mm, the length L4 of the third sub-section 113c is 8.5 mm to 9.5 mm, the length L5 of the fourth sub-section 113d is 4 mm to 4.5 mm, and the length L6 of the fifth sub-section 113e is 4.5 mm to 5.5 mm. When the feeding section 112, the first sub-section 113a, the second sub-section 113b, the third sub-section 113c, the fourth sub-section 113d, and the fifth sub-section 113e are within the above ranges, the internal space of the product can be utilized more effectively in practical applications, improving the radiation efficiency of the FPC antenna 11.
[0036] Specifically, the length L1 of the feeding section 112 can be any one of 12 mm, 12.5 mm, 13 mm, 13.5 mm, and 14 mm, the length L2 of the first sub-section 113a can be any one of 6.5 mm, 7 mm, and 7.5 mm, the length L3 of the second sub-section 113b can be any one of 4.5 mm, 5 mm, and 5.5 mm, the length L4 of the third sub-section 113c can be any one of 8.5 mm, 8 mm, and 9.5 mm, the length L5 of the fourth sub-section 113d can be any one of 4 mm, 4.3 mm, and 4.5 mm, and the length L6 of the fifth sub-section 113e can be any one of 4.5 mm, 5 mm, and 5.5 mm.
[0037] Specifically, the grounding point 111a and the feeding point 111b are round holes. Spring pins (pogo pins) are provided at the ground (GND) of the circuit board 1 and the feeding point 111b, and the grounding point 111a and the feeding point 111b are respectively welded to the spring pins. The diameters of the grounding point 111a and the feeding point 111b are 0.5 mm to 1 mm; the windowing area 111c is rectangular, the length L7 of the windowing area 111c is 2 mm to 2.5 mm, and the width W1 is 1 mm to 2 mm. Specifically, the diameters of the grounding point 111a and the feeding point 111b can be any one of 0.5 mm, 0.8 mm, and 1 mm, the length L7 of the windowing area 111c can be any one of 2 mm, 2.3 mm, and 2.5 mm, and the width W1 can be any one of 1 mm, 1.5 mm, and 2 mm.
[0038] Further, as shown in Table 1 below, the antenna efficiency Efficiency and antenna gain Gain data of the FPC antenna 11 of the present utility model corresponding to the operating frequency Frequency are presented. The operating frequency is the frequency band at which the FPC antenna 11 of the present utility model operates. The antenna efficiency can measure the efficiency of the antenna of the present utility model in radiating signals, and the antenna gain is an index describing the ability of the FPC antenna 11 to concentrate the input power and radiate it in a specific direction. The highest antenna efficiency of the present utility model is 50.17%. In the case where the antennas of similar products are only 30 - 40%, it has increased by more than 10%, having the advantage of high efficiency. The antenna gain of similar products is about 1 - 1.5 dBi, and the maximum gain of the FPC antenna 11 of the present utility model is 3.1 dBi, having the advantage of high gain.
[0039] Table 1
[0040] Frequency (MHz) 2400 2410 2420 2430 2440 2450 2460 2470 2480 2490 2500 Efficiency (%) 47.55 45.52 48.79 47.25 50.17 48.8 47.05 44.05 48.61 53.09 55.43 Gain (dBi) 3.1 2.81 3.03 2.75 2.91 2.91 2.87 2.62 3.12 3.56 3.71
[0041] Further, Figures 3 to 5 They are respectively the radiation pattern of the H - plane (Horizontal), i.e., the horizontal plane, of the FPC antenna 11 at three frequency points of 2400 MHz, 2440 MHz, and 2480 MHz. From Figures 3 to 5 the radiation pattern, one can visually observe the signal intensity of the signal radiated by the antenna in each direction on the horizontal plane. The FPC antenna 11 of the present utility model is an omnidirectional antenna. When used indoors, it can achieve 360 - degree coverage without dead spots and without jamming.
[0042] As Figure 2 shown, the present utility model also discloses a circuit board 1, which includes a board body 12 and the above - mentioned antenna; the grounding point 111a and the feeding point 111b are respectively welded to the ground and the feeding point on the board body 12.
[0043] Specifically, the connecting section 111 is located on the circuit board 1; at least part of the feeding section 112 and the first sub - section 113a are located outside the circuit board 1; the second sub - section 113b, the third sub - section 113c, the fourth sub - section 113d, and the fifth sub - section 113e are located outside the circuit board 1. While ensuring the normal electrical connection between the FPC antenna 11 and the circuit board 1, it can make greater use of the clearance area of the circuit board 1, maximize the setting of the FPC, and improve the signal radiation efficiency. At the same time, since at least part of the feeding section 112 and the first sub - section 113a are outside the circuit board 1, and the second sub - section 113b, the third sub - section 113c, the fourth sub - section 113d, and the fifth sub - section 113e are outside the circuit board 1 and have a certain distance from the circuit board 1, it can avoid the electromagnetic interference on the circuit board 1 so as not to affect the signal radiation efficiency of the FPC antenna 11.
[0044] In specific applications, the part of the FPC antenna 11 located outside the circuit board 1 can be affixed to the inner wall surface of the housing of the wireless microphone.
[0045] The present utility model also discloses a wireless microphone, which includes the above-mentioned antenna or the above-mentioned circuit board 1. Since the wireless microphone has the above-mentioned circuit board 1 or antenna, it also has the same technical effects as the above-mentioned circuit board 1 or antenna, which will not be elaborated here.
[0046] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it. For those skilled in the art, the technical solutions recorded in the above embodiments can be modified, or some of the technical features can be equivalently replaced; and all such modifications and replacements should fall within the protection scope of the appended claims of the present utility model.
Claims
1. An FPC antenna, characterized in that, It includes a connection section, a feeding section, and a radiation section; the radiation section includes a first sub-section, a second sub-section, a third sub-section, a fourth sub-section, and a fifth sub-section that are connected in sequence; There are a grounding point and a feeding point provided on the connection section. The grounding point is used to connect to the ground on the circuit board, and the feeding point is used to connect to the feeding point on the circuit board; the feeding section is connected to one end of the connection section, and the feeding section is disposed opposite to the radiation section; The first sub-section is connected to the other end of the connection section and is disposed opposite to the feeding section; the second sub-section extends in a direction away from the feeding section; the third sub-section is disposed opposite to the feeding section; the fourth sub-section extends in a direction close to the feeding section; the fifth sub-section is disposed opposite to the feeding section and extends in a direction close to the second sub-section.
2. The FPC antenna according to claim 1, wherein The connection section is used to be disposed on the circuit board; at least part of the feeding section and the first sub-section are used to be disposed outside the circuit board; the second sub-section, the third sub-section, the fourth sub-section, and the fifth sub-section are used to be disposed outside the circuit board.
3. The FPC antenna according to claim 1 or 2, characterized in that, There is a window area opened on the connection section. The grounding point and the feeding point are located in the window area, and a gold-plated layer covers the window area.
4. The FPC antenna according to claim 1 or 2, characterized in that The first sub-section, the third sub-section, and the fifth sub-section are all disposed parallel to the feeding section.
5. The FPC antenna according to claim 4, characterized in that, The second sub-section is disposed perpendicular to the first sub-section, and the fourth sub-section is disposed perpendicular to the fifth sub-section.
6. The FPC antenna according to claim 1 or 2, characterized in that, The length of the feeding section is 12 mm to 14 mm, the length of the first sub-section is 6.5 mm to 7.5 mm, the length of the second sub-section is 4.5 mm to 5.5 mm, the length of the third sub-section is 8.5 mm to 9.5 mm, the length of the fourth sub-section is 4 mm to 4.5 mm, and the length of the fifth sub-section is 4.5 mm to 5.5 mm.
7. The FPC antenna according to claim 3, characterized in that, The grounding point and the feeding point are round holes, and the diameters of the grounding point and the feeding point are 0.5 mm to 1 mm; the window area is rectangular, the length of the window area is 2 mm to 2.5 mm, and the width is 1 mm to 2 mm.
8. A circuit board, characterized in that, It includes a board body and the antenna according to any one of claims 1 to 7; the grounding point and the feeding point are respectively welded to the ground and the feeding point on the board body.
9. The circuit board according to claim 8, characterized in that, The connection section is located on the circuit board; at least part of the feeding section and the first sub-section are located outside the circuit board; the second sub-section, the third sub-section, the fourth sub-section, and the fifth sub-section are located outside the circuit board.
10. A wireless microphone, characterized in that, It includes the antenna according to any one of claims 1 to 7, or the circuit board according to claim 8 or 9.