Small FPC multi-band 5G antenna

Abstract

The utility model discloses a compact FPC multi-band 5G antenna, which 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, the second radiation oscillators are of a continuous horizontal arch structure and are symmetrically connected to the two sides of the grounding part, and the third 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 provided by the utility model adopts the combination of the jump type feed mode, the bow-shaped + C-shaped radiation oscillator and the bent concentric-square-shaped radiation oscillator to complete the small and exquisite FPC multi-band 5G antenna.

Description

Technical Field

[0001] The utility model relates to the technical field of antennas, and in particular to a compact FPC multi-band 5G antenna. Background Art

[0002] In the existing 4G / 5G full network terminal products, a single monopole, IFA, PIFA or loop and other classic structure routing forms are generally adopted, and manufacturers basically strictly control the cost of materials. However, this obviously cannot meet the multi-band communication equipment requirements of various complex wireless terminal devices on the market, and its performance is difficult to achieve.

[0003] Most existing wireless terminal devices have the following technical problems: low material utilization and large space occupation, which requires concessions or cuts in other functional components of the overall device, resulting in frequent upgrades and high production costs. Currently, many terminal antenna products use a single antenna routing structure or form to achieve multi-band performance, and cannot achieve communication performance in multiple frequency bands. This results in some substandard frequency efficiencies being produced and sold, resulting in some communication terminals on the market experiencing poor signals or no signal reception when in use. Utility Model Content

[0004] Based on the above technical problems, an embodiment of the present application provides a compact FPC multi-band 5G antenna, which can not only achieve multi-band performance requirements, but also reduce the size of the antenna, with low cost and fast production cycle.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a compact FPC multi-band 5G antenna, comprising: an FPC substrate, on which a feeding part, a grounding part, a first radiating vibrator, a second radiating vibrator, and a third radiating vibrator are provided, the grounding part is arranged in the middle of the FPC substrate, the first radiating vibrator is a continuous horizontal arch structure and is symmetrically connected on both sides of the grounding part, the second radiating vibrator is a C-shaped structure and is symmetrically connected at both ends of the first radiating vibrator, the feeding part is arranged above the grounding part, the third radiating vibrator is electrically connected to the feeding part and surrounds the feeding part, and the feeding part skips part of the third radiating vibrator to feed the first radiating vibrator and the second radiating vibrator.

[0006] Furthermore, the third radiating element includes an internal element line connected to the feeding portion and an external element line connected to the internal element line, and the external element line surrounds the internal element line, and the two form a U-shaped structure.

[0007] Furthermore, the external dipole line includes a partition line, the partition line is located between the feeding part and the grounding part, and the feeding part jumps over the partition line to feed the first radiation dipole and the second radiation dipole.

[0008] Furthermore, the spacing between the internal dipole line and the external dipole line is equal to the routing width of the internal dipole line and the external dipole line.

[0009] Furthermore, it also includes a radiation oscillator branch, which is connected to the right end of the external oscillator line of the third radiation oscillator.

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

[0011] Furthermore, the first radiating element includes: an arched transverse radiating arm 1, a longitudinal arched longitudinal radiating arm 1, an arched longitudinal radiating arm 2, and an arched transverse radiating arm 2; one end of the arched transverse radiating arm 1 is connected to the feeding part, and the other end is connected end to end with the arched longitudinal radiating arm 1, the arched transverse radiating arm 2, and the arched longitudinal radiating arm 2 in sequence and are repeatedly arranged multiple times; the tail of the first radiating element is the arched longitudinal radiating arm 1, and the arched longitudinal radiating arm 1 is connected to the second radiating element.

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

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

[0014] Furthermore, the routing width of the second radiating element is greater than the routing width of the first radiating element.

[0015] Furthermore, the FPC substrate is made of copper and PI material, and has a thickness of 0.1 mm.

[0016] The beneficial effects of the utility model are: by forming a unified whole composed of single feed and ground feed, the intermediate frequency and high frequency radiation parts are realized by adopting a curved loop structure and a jumping feeding method, and the 5G low-frequency part is generated by coupling the first radiating element of the ground part bow type + C type, the second radiating element and the third radiating element of the feeding part loop type, thereby completing the electromagnetic wave radiation of the entire multi-frequency 5G antenna. The overall structure of the FPC multi-band 5G antenna of the utility model is compact and light, low cost, superior performance and short production cycle. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 This is a schematic diagram of a compact FPC multi-band 5G antenna provided on a device in an embodiment of the utility model;

[0019] Figure 3 This is a voltage standing wave ratio diagram of the compact FPC multi-band 5G antenna in the embodiment of the utility model;

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

[0021] Figure markings: 1-compact FPC multi-band 5G antenna, 2-equipment, 10-FPC substrate, 20-feeding part, 30-grounding part, 40-first radiating element, 50-second radiating element, 60-third radiating element, 70-radiating element branch, 401-bow-shaped horizontal first radiating arm, 402-bow-shaped vertical first radiating arm, 403-bow-shaped vertical second radiating arm, 404-bow-shaped horizontal second radiating arm, 501-C-type horizontal first radiating arm, 502-C-type vertical first radiating arm, 503-C-type horizontal second radiating arm, 601-internal radiator line, 602-external radiator line, 6020-partitioning line. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model is described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific implementation disclosed below.

[0023] The embodiment of the present application solves the technical problems of the 5G antenna being too large and having high production costs in the prior art by providing a compact FPC multi-band 5G antenna. It should be noted that in the present application, the direction of the third radiating element relative to the first radiating element is up, above, upper side, upper end, top, top or top, and the opposite direction is down, below, lower side, lower end, bottom, bottom end or bottom.

[0024] like Figure 1-Figure 2 As shown, this is an embodiment of the present application:

[0025] A compact FPC multi-band 5G antenna comprises: an FPC substrate 10, on which are provided a feeding part 20, a grounding part 30, a first radiating element 40, a second radiating element 50, and a third radiating element 60. The grounding part 30 is arranged in the middle of the FPC substrate 10, the first radiating element 40 is a continuous horizontal arch structure and is symmetrically connected on both sides of the grounding part 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 feeding part 20 is arranged above the grounding part, the third radiating element 60 is electrically connected to the feeding part 20 and surrounds the feeding part, and the feeding part 20 skips part of the third radiating element 60 to feed the first radiating element 40 and the second radiating element 50.

[0026] The third radiating element 60 includes an inner radiating element line 601 connected to the feeding part 20, and an outer radiating element line 602 connected to the inner radiating element line 601, wherein the outer radiating element line 602 surrounds the inner radiating element line 601, and the two form a U-shaped structure. The outer radiating element line 602 includes a horizontal partition line 6020, and the partition line 6020 is located between the feeding part 20 and the grounding part 30. The feeding part 20 jumps over the partition line 6020 to feed the first radiating element 40 and the second radiating element 50.

[0027] The third radiating element 60 of the curved structure is the main radiating element of the 5G medium and high frequency band (1710-2690MHz). The third radiating element 60, which is extended and surrounded by the feeding part 20, calculates the physical size of the longest medium frequency 1710 MHz resonance frequency to be ≈44mm (operable frequency band 1710-2170MHz) according to the working wavelength formula λ≈c / f of the antenna frequency. In addition, its special feeding method (jump feeding method, that is, there is a partition line 6020 between the feeding part 20 and the grounding part 30) and spacing design (that is, the spacing between the internal radiator line 601 and the external radiator line 602 is equal to the routing width of the two, that is, the spacing is 1 / 3 of the overall width), which can effectively tune and compress the high frequency band after 2300MHz to its operating wavelength, so that the antenna radiation of the medium and high frequency band is completed in this small area, breaking through the technical difficulties of the present invention, saving materials and freeing up equipment space, realizing the multi-band function of the antenna, and saving R&D and production costs.

[0028] Furthermore, the antenna in this embodiment further includes a radiation dipole branch 70 , and the radiation dipole branch 70 is connected to the right end of the external dipole line 602 of the third radiation dipole 60 .

[0029] Preferably, the radiating vibrator branch 70 is linear, which is the ultra-high frequency working vibrator arm of the 5G antenna. Its working wavelength branch (center frequency 4200MHz λ≈17mm) is extended through the right side of the end of the loop structure. It is parallel to the first radiating vibrator 40 as a whole. Under the action of the bow-shaped first radiating vibrator 40, the electromagnetic wave propagation of the antenna in the 3300-5000MHz frequency band is perfectly realized.

[0030] Specifically, the bow-shaped first radiating element includes: a plurality of bow-shaped horizontal radiation arms 1 401, bow-shaped vertical radiation arms 1 402, bow-shaped vertical radiation arms 2 404, and bow-shaped horizontal radiation arms 2 403, one end of the bow-shaped horizontal radiation arm 1 401 is connected to the feeding part 20, and the other end is connected end to end with the bow-shaped vertical radiation arm 1 402, bow-shaped horizontal radiation arm 2 404, and bow-shaped vertical radiation arm 2 403 in sequence and repeatedly arranged; the tail of the first radiating element 40 is the bow-shaped vertical radiation arm 1 402, and the bow-shaped vertical radiation arm 1 402 is connected to the second radiating element 50.

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

[0032] The bow-shaped first radiating element, while serving as the antenna reference ground, utilizes another bow-shaped branch structure (grounding portion 30) in the form of a dipole to increase the physical length of the wavelength of the 5G low-frequency band (824-960MHz), thereby playing a role in tuning and anti-interference. The C-shaped second radiating element 50 extending on both sides is exactly 1 / 2 wavelength of the low-frequency band (824-960MHz), and is coupled with the meandering structure of the feeding portion 20 to generate the required low-frequency band frequency (824-960MHz).

[0033] As a preferred mode of this embodiment, the routing width of the second radiating element 50 is greater than the routing width of the first radiating element 40. The main function of the C-shaped thickened element arm form is to increase the radiation bandwidth of the low-frequency band, maximize the use 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 resonance point and bandwidth expansion, so that the antenna low-frequency band radiation performance can achieve the best utilization of the electromagnetic wave propagation characteristics.

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

[0035] The feeding part 20 in this embodiment is the antenna feeding pad, the access point for transmitting and receiving radio frequency signals. The grounding part 30 is grounded by welding the RF feeder braid layer through the designed and debugged antenna corresponding frequency radiation element to make the transmitted / received signals more stable and powerful, and more effectively reduce the influence or interference of the equipment structure environment on the antenna.

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

[0037] like Figure 3-Figure 4 According to OTA laboratory tests, the 5G NR low-frequency band (824-960MHz) under Sub 6G has a voltage standing wave ratio of <3.0 and an efficiency of more than 40%; the mid-high frequency band (1710-2690MHz) has a voltage standing wave ratio of <3.2 and an efficiency of more than 42%; the ultra-high frequency band (3300-5000MHz) has a voltage standing wave ratio of <2.5 and an efficiency of more than 52%. Figure 3 The network analyzer test results are relatively 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 the utility model patent has fully met the actual receiving and transmitting performance and the directivity is nearly omnidirectional, achieving the best radiation effect.

[0038] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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 above-mentioned embodiments only express the implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A compact FPC multi-band 5G antenna, characterized in that: include: An FPC substrate is provided with a feeding part, a grounding part, a first radiating vibrator, a second radiating vibrator, and a third radiating vibrator. The grounding part is arranged in the middle of the FPC substrate, the first radiating vibrator is a continuous horizontal arch structure and is symmetrically connected to both sides of the grounding part, the second radiating vibrator is a C-shaped structure and is symmetrically connected to both ends of the first radiating vibrator, the feeding part is arranged above the grounding part, the third radiating vibrator is electrically connected to the feeding part and surrounds the feeding part, and the feeding part skips part of the third radiating vibrator to feed the first radiating vibrator and the second radiating vibrator.

2. The compact FPC multi-band 5G antenna according to claim 1, characterized in that: The third radiating element includes an internal radiator line connected to the feeding portion and an external radiator line connected to the internal radiator line. The external radiator line surrounds the internal radiator line, 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 dipole line includes a partition line, the partition line is located between the feeding part and the grounding part, and the feeding part jumps over the partition line to feed the first radiation dipole and the second radiation dipole.

4. The compact FPC multi-band 5G antenna according to claim 2, characterized in that: The spacing between the internal oscillator line and the external oscillator line is equal to the routing width of the internal oscillator line and the external oscillator line.

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

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

7. The compact FPC multi-band 5G antenna according to claim 1, characterized in that: The bow-shaped first radiating element includes: a plurality of bow-shaped horizontal radiation arms, bow-shaped vertical radiation arms, bow-shaped vertical radiation arms, and bow-shaped horizontal radiation arms. One end of the bow-shaped horizontal radiation arm is connected to the feeding part, and the other end is connected to the bow-shaped vertical radiation arm, bow-shaped horizontal radiation arm, and bow-shaped vertical radiation arm in sequence and are repeatedly arranged multiple times. The tail of the first radiating element is the bow-shaped vertical radiation arm, and the bow-shaped vertical radiation arm 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 element comprises a C-shaped transverse first radiating arm, a C-shaped longitudinal first radiating arm, and a C-shaped transverse second radiating arm which are sequentially connected to the arched longitudinal first radiating arm of the first radiating element.

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

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

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