Small FPC multi-band 5G antenna

Abstract

A small FPC multi-band 5G antenna disclosed by the present invention comprises an FPC substrate, the FPC substrate is provided with a feed part, a grounding part, first radiation oscillators, second radiation oscillators and third radiation oscillators, the grounding part is arranged in the middle of the FPC substrate, the first radiation oscillators are of a continuous horizontal arch structure and are symmetrically connected to the two sides of the grounding part, and the second radiation oscillators are of a continuous horizontal arch structure and are symmetrically connected to the two sides of the grounding part. The first radiation oscillator is of a C-shaped structure, the second radiation oscillator is of a C-shaped structure and is symmetrically connected to the two ends of the first radiation oscillator respectively, the feed part is arranged above the grounding part, the third radiation oscillator is electrically connected with the feed part and surrounds the feed part, and the feed part skips part of the third radiation oscillator and feeds power to the first radiation oscillator and the second radiation oscillators. Compared with the prior art, the small and exquisite FPC multi-band 5G antenna has the advantages that the small and exquisite FPC multi-band 5G antenna is formed by combining the jump type feed mode, the bow-shaped + C-shaped radiation oscillator and the bending type concentric-square-shaped radiation oscillator.

Description

Technical Field

[0001] This invention relates to the field of antenna technology, and in particular to a compact FPC multi-band 5G antenna. Background Technology

[0002] In existing 4G / 5G full-network compatible terminal products, the wiring forms of classic structures such as Monopole, IFA, PIFA or Loop are generally adopted, and manufacturers are basically strictly controlling the cost of materials. However, this obviously cannot meet the multi-band communication requirements of various complex wireless terminal devices on the market, so it is difficult to achieve the required performance.

[0003] Many existing wireless terminal devices suffer from the following technical problems: low material utilization and large space occupation, forcing compromises or reductions in other functional components, leading to frequent upgrades and high production costs. Currently, many terminal antenna products rely on a single antenna wiring structure or form to achieve multi-band performance, failing to realize the full range of communication capabilities required for multiple bands. This results in the continued production and sale of substandard frequency efficiency devices, causing some communication terminals on the market to experience poor signal strength or inability to receive signals. Summary of the Invention

[0004] Based on the above-mentioned technical problems, this application provides a compact FPC multi-band 5G antenna that can meet the multi-band performance requirements, reduce the antenna size, reduce costs, and accelerate the production cycle.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a compact FPC multi-band 5G antenna, comprising: an FPC substrate, wherein the FPC substrate is provided with a feed section, a ground section, a first radiating element, a second radiating element, and a third radiating element; the ground section is located in the middle of the FPC substrate; the first radiating element is a continuous horizontal bow-shaped structure symmetrically connected to both sides of the ground section; the second radiating element is a C-shaped structure symmetrically connected to both ends of the first radiating element; the feed section is located above the ground section; the third radiating element is electrically connected to the feed section and surrounds the feed section; the feed section skips a portion of the third radiating element to feed the first radiating element and the second radiating element.

[0006] Furthermore, the third radiating oscillator includes an inner oscillator wire connected to the power supply section and an outer oscillator wire connected to the inner oscillator wire. The outer oscillator wire surrounds the inner oscillator wire, and the two form a U-shaped structure.

[0007] Furthermore, the external oscillator line includes a spacer line, the spacer line being located between the power supply section and the grounding section, and the power supply section jumping over the spacer line to supply power to the first radiating oscillator and the second radiating oscillator.

[0008] Furthermore, the spacing between the inner and outer vibrating wires is equal to the width of the inner and outer vibrating wires.

[0009] Furthermore, it also includes a radiating oscillator stub, which is connected to the right end of the outer oscillator line of the third radiating oscillator.

[0010] Furthermore, the radiating oscillator branch is linear and parallel to the overall first radiating oscillator.

[0011] Furthermore, the first radiating oscillator includes: a bow-shaped horizontal radiating arm, a longitudinal bow-shaped vertical radiating arm, a bow-shaped vertical second radiating arm, and a bow-shaped horizontal second radiating arm. One end of the bow-shaped horizontal radiating arm is connected to the feed section, and the other end is connected end-to-end with the bow-shaped vertical first radiating arm, the bow-shaped horizontal second radiating arm, and the bow-shaped vertical second radiating arm in sequence and arranged repeatedly. The tail of the first radiating oscillator is a bow-shaped vertical first radiating arm, which is connected to the second radiating oscillator.

[0012] Furthermore, the second radiating oscillator includes a C-shaped transverse radiating arm, a C-shaped longitudinal radiating arm, and a C-shaped transverse radiating arm that are sequentially connected to the bow-shaped longitudinal radiating arm of the first radiating oscillator.

[0013] Furthermore, the length of the first C-shaped transverse radiating arm is greater than that of the second C-shaped transverse radiating arm.

[0014] Furthermore, the trace width of the second radiating oscillator is greater than that of the first radiating oscillator.

[0015] Furthermore, the FPC substrate is composed of copper and PI materials, with a thickness of 0.1 mm.

[0016] The beneficial effects of this invention are as follows: by unifying the single-feed and ground-feed components into a single unit, employing a curved loop structure and a skip-feed method for the intermediate and high-frequency radiating sections, and coupling the first and second radiating elements (which are special bow-shaped + C-shaped elements in the grounding section) with the loop-shaped third radiating element in the feeding section to generate the 5G low-frequency portion, the electromagnetic wave radiation of the entire multi-band 5G antenna is thus completed. The FPC multi-band 5G antenna of this invention has a compact and lightweight overall structure, low cost, superior performance, and a short production cycle. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a compact FPC multi-band 5G antenna structure in an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of a compact FPC multi-band 5G antenna mounted on a device according to an embodiment of the present invention;

[0019] Figure 3 This is a voltage standing wave ratio (VSWR) diagram of a compact FPC multi-band 5G antenna in an embodiment of the present invention.

[0020] Figure 4 This is an efficiency diagram of a compact FPC multi-band 5G antenna in an embodiment of the present invention;

[0021] Reference numerals: 1-Compact FPC multi-band 5G antenna, 2-Equipment, 10-FPC substrate, 20-Feed section, 30-Ground section, 40-First radiating element, 50-Second radiating element, 60-Third radiating element, 70-Radiating element stub, 401-Arch-shaped horizontal radiating arm, 402-Arch-shaped vertical radiating arm, 403-Arch-shaped vertical radiating arm, 404-Arch-shaped horizontal radiating arm, 501-C-type horizontal radiating arm, 502-C-type vertical radiating arm, 503-C-type horizontal radiating arm, 601-Internal element wire, 602-External element wire, 6020-Blocking wire. Detailed Implementation

[0022] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] This application provides a compact FPC multi-band 5G antenna, solving the technical problems of excessively large size and high production cost of existing 5G antennas. It should be noted that in this application, the direction of the third radiating element relative to the first radiating element is upward, above, upper side, upper end, top, or top, while the opposite direction is downward, below, lower side, lower end, bottom, or bottom.

[0024] like Figures 1-2 The following is an embodiment of this application:

[0025] A compact FPC multi-band 5G antenna includes: an FPC substrate 10, on which a feed section 20, a ground section 30, a first radiating element 40, a second radiating element 50, and a third radiating element 60 are provided. The ground section 30 is located in the middle of the FPC substrate 10. The first radiating element 40 is a continuous horizontal bow-shaped structure and is symmetrically connected to both sides of the ground section 30. The second radiating element 50 is a C-shaped structure and is symmetrically connected to both ends of the first radiating element 40. The feed section 20 is located above the ground section. The third radiating element 60 is electrically connected to the feed section 20 and surrounds the feed section. The feed section 20 feeds power to the first radiating element 40 and the second radiating element 50 by skipping a portion of the third radiating element 60.

[0026] The third radiating element 60 includes an inner vibrating element line 601 connected to the feed section 20 and an outer vibrating element line 602 connected to the inner vibrating element line 601. The outer vibrating element line 602 surrounds the inner vibrating element line 601, forming a U-shaped structure. The outer vibrating element line 602 includes a horizontal isolation line 6020 located between the feed section 20 and the grounding section 30. The feed section 20 jumps over the isolation line 6020 to feed power to the first radiating element 40 and the second radiating element 50.

[0027] The third radiating element 60, with its curved loop structure, is the main radiating element for the mid-to-high frequency band (1710-2690MHz) of 5G. Extending and surrounding the third radiating element 60 via the feed section 20, the physical size of the longest mid-frequency resonant frequency 1710 MHz is approximately 44mm (operating frequency band 1710-2170MHz) is calculated based on the antenna frequency operating wavelength formula λ≈c / f. In addition, its special feed method (skip-feed method, i.e., there is a disconnect line 6020 between the feed section 20 and the ground section 30) and spacing design (i.e., the spacing between the internal vibrator line 601 and the external vibrator line 602 is equal to the width of their traces, i.e., the spacing is 1 / 3 of the overall width) can effectively tune and compress the high frequency band after 2300MHz to its operating wavelength, enabling mid-to-high frequency antenna radiation to be completed in this small area. This overcomes the technical difficulties of the present invention, saves materials and frees up equipment space, realizes the multi-band function of the antenna, and saves R&D and production costs.

[0028] Furthermore, the antenna in this embodiment also includes a radiating dipole stub 70, which is connected to the right end of the outer dipole line 602 of the third radiating dipole 60.

[0029] Preferably, the radiating element stub 70 is linear, which is the ultra-high frequency working arm of the 5G antenna. The stub extending to the right end of the loop structure has its working wavelength (center frequency 4200MHz λ≈17mm). It is parallel to the first radiating element 40. Under the action of the bow-shaped first radiating element 40, the electromagnetic wave propagation of the antenna in the 3300-5000MHz frequency band is perfectly realized.

[0030] Specifically, the bow-shaped first radiating oscillator includes: multiple bow-shaped horizontal first radiating arms 401, bow-shaped vertical first radiating arms 402, bow-shaped vertical second radiating arms 404, and bow-shaped horizontal second radiating arms 403. One end of the bow-shaped horizontal first radiating arm 401 is connected to the feed unit 20, and the other end is connected end-to-end with the bow-shaped vertical first radiating arm 402, bow-shaped horizontal second radiating arm 404, and bow-shaped vertical second radiating arm 403, and the arrangement is repeated multiple times. The tail of the first radiating oscillator 40 is the bow-shaped vertical first radiating arm 402, which is connected to the second radiating oscillator 50.

[0031] The C-shaped second radiating element 50 includes a C-shaped horizontal first radiating arm 501, a C-shaped vertical first radiating arm 502, and a C-shaped horizontal second radiating arm 503, which are sequentially connected to the arc-shaped vertical first radiating arm 402 of the first radiating element 40. The length of the C-shaped horizontal first radiating arm 501 is greater than that of the C-shaped horizontal second radiating arm 503. The C-shaped second radiating element 50 is an extension of the arc-shaped first radiating element 40, and the combined radiating arm serves the 5G low-frequency band (824-960MHz).

[0032] The first bow-shaped radiating element serves as the antenna reference ground. At the same time, it utilizes another bow-shaped stub structure (grounding part 30) in the form of a dipole to increase the physical length of the 5G low-frequency band (824-960MHz) wavelength, playing a role in tuning and anti-interference. Together with the C-shaped second radiating element 50 extending on both sides, it is exactly half the wavelength length of the low-frequency band (824-960MHz). It is coupled with the curved loop structure of the feed part 20 to generate the required low-frequency band frequency (824-960MHz).

[0033] In a preferred embodiment, the trace width of the second radiating element 50 is greater than that of the first radiating element 40. The main function of the C-shaped thickened radiating arm is to increase the radiation bandwidth in the low-frequency band, maximize the utilization of the effective clearance area of ​​the equipment, and realize the special physical structure of the antenna radiation. That is, the combination of the bow-shaped first radiating element 40 and the extended C-shaped second radiating element 50 can better tune the low-frequency resonant point and bandwidth expansion, so that the low-frequency radiation performance of the antenna can achieve the best utilization of electromagnetic wave propagation characteristics.

[0034] In this embodiment, the FPC substrate is made of copper and PI materials, and its dimensions (length * width * thickness) are 78 * 10 * 0.1 mm. The main antenna circuit is made on its surface by laser engraving. This antenna FPC substrate 10 is small in size, simple in structure, and low in cost.

[0035] In this embodiment, the feed section 20 is the antenna feed pad, serving as the access point for transmitting and receiving radio frequency signals. It is a key signal channel for antenna electromagnetic wave radiation and reception via a designed and debugged antenna radiating element at the corresponding frequency. The grounding section 30 is grounded via an RF feed braid layer. Its function is to make the transmitted / received signals more stable and stronger after grounding, and to more effectively reduce the impact or interference of the equipment structure environment on the antenna.

[0036] In summary, the 5G antenna in this embodiment achieves the predetermined specifications of the small-size antenna structure by utilizing a special and innovative antenna combination structure within the smallest and lightest FPC material (including a very small antenna copper area), greatly saving R&D costs and antenna mass production cycle.

[0037] like Figures 3-4 According to OTA laboratory tests, the 5G NR low-frequency band (824-960MHz) under Sub 6G has a voltage standing wave ratio (VSWR) of <3.0 and an efficiency of >40%; the mid-high frequency band (1710-2690MHz) has a VSWR of <3.2 and an efficiency of >42%; and the ultra-high frequency band (3300-5000MHz) has a VSWR of <2.5 and an efficiency of >52%. Figure 3 The network analyzer test results are quite ideal (VSWR<4.0), the antenna reflection coefficient is small, and the energy loss of antenna radiation is small. The results show that the antenna performance of this invention patent has fully met the actual transmission and reception performance requirements and the directivity is almost omnidirectional, achieving the best radiation effect.

[0038] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The embodiments described above are merely illustrative of implementation methods of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A compact FPC multi-band 5G antenna, characterized in that, include: The FPC substrate has a power supply section, a grounding section, a first radiating element, a second radiating element, and a third radiating element. The grounding section is located in the middle of the FPC substrate. The first radiating element is a continuous horizontal bow-shaped structure symmetrically connected to both sides of the grounding section. The second radiating element is a C-shaped structure symmetrically connected to both ends of the first radiating element. The power supply section is located above the grounding section. The third radiating element is electrically connected to the power supply section and surrounds the power supply section. The power supply section bypasses part of the third radiating element to supply power to the first and second radiating elements.

2. The compact FPC multi-band 5G antenna according to claim 1, characterized in that: The third radiating oscillator includes an inner oscillator wire connected to the power supply section and an outer oscillator wire connected to the inner oscillator wire. The outer oscillator wire surrounds the inner oscillator wire, and the two form a U-shaped structure.

3. The compact FPC multi-band 5G antenna according to claim 2, characterized in that: The external oscillator line includes a blocking line located between the power supply section and the grounding section. The power supply section jumps over the blocking line to supply power to the first radiating oscillator and the second radiating oscillator.

4. The compact FPC multi-band 5G antenna according to claim 2, characterized in that: The spacing between the inner and outer vibrating wires is equal to the width of the inner and outer vibrating wires.

5. The compact FPC multi-band 5G antenna according to claim 2, characterized in that: It also includes a radiating oscillator stub, which is connected to the right end of the outer oscillator line of the third radiating oscillator.

6. The compact FPC multi-band 5G antenna according to claim 5, characterized in that: The radiating oscillator branch is linear and parallel to the overall first radiating oscillator.

7. The compact FPC multi-band 5G antenna according to claim 1, characterized in that: The first bow-shaped radiating element includes: multiple bow-shaped horizontal first radiating arms, bow-shaped vertical first radiating arms, bow-shaped vertical second radiating arms, and bow-shaped horizontal second radiating arms. One end of the bow-shaped horizontal first radiating arm is connected to the feed unit, and the other end is connected end-to-end with the bow-shaped vertical first radiating arm, the bow-shaped horizontal second radiating arm, and the bow-shaped vertical second radiating arm in sequence and arranged repeatedly. The tail of the first radiating element is a bow-shaped vertical first radiating arm, which is connected to the second radiating element.

8. The compact FPC multi-band 5G antenna according to claim 7, characterized in that: The second radiating oscillator includes a C-shaped horizontal radiating arm, a C-shaped vertical radiating arm, and a C-shaped horizontal radiating arm that are sequentially connected to the bow-shaped longitudinal radiating arm of the first radiating oscillator.

9. The compact FPC multi-band 5G antenna according to claim 8, characterized in that: The length of the first horizontal radial arm of the C-type is greater than that of the second horizontal radial arm of the C-type.

10. The compact FPC multi-band 5G antenna according to claim 1, characterized in that: The trace width of the second radiating oscillator is greater than that of the first radiating oscillator.

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