Broadband FPC antenna and acquisition and transmission all-in-one machine

Abstract

The invention relates to the technical field of wireless communication, and discloses a broadband FPC antenna. The broadband FPC antenna comprises a copper foil layer. A black oil layer; an AD adhesive layer; a PI base layer; a 3M adhesive layer; a release paper layer; the radiation unit part is arranged on the copper foil layer and comprises first to fourth radiation parts; radiation intervals including first to fourth radiation intervals; the positioning part is arranged between the first radiation part and the second radiation part and between the third radiation part and the fourth radiation part; and a feeding point to which the radiation unit part is connected. The radiation unit part forms a multi-band synergistic radiation structure, the design of the multi-radiation part of the FPC antenna covers a wider frequency range, and impedance mismatch caused by frequency deviation of a single radiation unit is avoided, so that the energy transmission loss is reduced, the effective radiation power is improved, the communication distance is effectively increased, and the bit error rate is reduced. The positioning part limits the relative displacement of the radiation part, thereby preventing antenna impedance change or radiation direction offset from causing antenna performance reduction. The invention further discloses an acquisition and transmission all-in-one machine.

Description

Technical Field

[0001] This application relates to the field of wireless communication technologies, for example, to a wide-band FPC antenna and a data acquisition and transmission integrated machine. Background Art

[0002] With the rapid development of emerging technologies such as the Internet of Things, the demand for wireless devices to support multi-protocol and multi-band compatibility is becoming increasingly urgent. Some Internet of Things devices need to support low-power wide-area network bands such as Bluetooth (2.4 GHz), ZigBee (2.4 GHz / 915 MHz), and LoRa (868 MHz / 915 MHz) simultaneously, posing higher requirements for the wide-band coverage ability of antennas.

[0003] Traditional narrow-band antennas are difficult to meet the requirement of "one device, multiple frequencies". By expanding the operating frequency band, wide-band antennas can significantly reduce the number of device antennas, simplify the hardware design, and become a key support for the miniaturization and integration of wireless communication terminals. Due to defects such as high hardness, large weight, and difficulty in conforming to curved surfaces, traditional rigid antennas can no longer adapt to flexible electronic scenarios.

[0004] FPC antennas use flexible circuit boards as carriers and fabricate antenna patterns through printing processes. They have advantages such as being bendable, foldable, thin in thickness, and light in weight, and can be conformally integrated with flexible substrates, becoming an ideal antenna solution for flexible electronic devices. However, the flexible characteristics of FPCs and the high losses of the materials themselves pose challenges to the wide-band performance of antennas.

[0005] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related technologies: The energy transmission loss of the FPC antenna increases, the communication distance shortens, and the bit error rate rises. In vibration, impact, or multi-degree-of-freedom bending scenarios, the FPC antenna is prone to impedance changes or radiation direction offsets caused by position offsets, resulting in a decline in antenna performance. Summary of the Invention

[0006] To provide a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. This summary is not a comprehensive review, nor is it intended to identify key / important constituent elements or delineate the protection scope of these embodiments. Instead, it serves as a preface to the subsequent detailed description.

[0007] Embodiments of the present disclosure provide a wide-band FPC antenna and a data acquisition and transmission integrated machine to solve the problems of unstable wide-band impedance matching and efficiency decline caused by dielectric loss of the FPC antenna in a bent state.

[0008] In some embodiments, the wide-band FPC antenna includes: A copper foil layer, which includes a radiation unit portion; A black oil layer, disposed below the copper foil layer; AD adhesive layer, which is disposed below the black oil layer; PI base layer, which is disposed below the AD adhesive layer; 3M adhesive layer, which is disposed below the PI base layer; Release paper layer, which is disposed below the 3M adhesive layer; Radiation unit part, which is disposed on the copper foil layer and includes a first radiation part, a second radiation part, a third radiation part and a fourth radiation part; Radiation interval, which is disposed between two adjacent radiation parts and includes a first radiation interval, a second radiation interval, a third radiation interval and a fourth radiation interval; Positioning part, which is disposed between the first radiation part and the second radiation part, and between the third radiation part and the fourth radiation part; Feeding point, to which the radiation unit part is connected.

[0009] In some embodiments, the acquisition and transmission integrated machine includes: A wide-band FPC antenna as described in the foregoing embodiments.

[0010] A wide-band FPC antenna and an acquisition and transmission integrated machine provided by an embodiment of the present disclosure can achieve the following technical effects: By adopting a wide-band FPC antenna provided by an embodiment of the present disclosure, a multi-band collaborative radiation structure is formed by setting a first radiation part, a second radiation part, a third radiation part and a fourth radiation part. The design of multiple radiation parts of the FPC antenna can cover a wider frequency range, avoid impedance mismatch caused by frequency offset of a single radiation unit, thereby reducing the energy transmission loss of the FPC antenna, improving the effective radiation power of the FPC antenna, effectively increasing the communication distance of the FPC antenna, and reducing the bit error rate of the FPC antenna.

[0011] By disposing the positioning part between the first radiation part and the second radiation part, and between the third radiation part and the fourth radiation part, a physical limit structure is formed. When the antenna is subjected to vibration, impact or multi-degree-of-freedom bending, the positioning part can limit the relative displacement of each radiation part, prevent the dislocation of the radiation unit caused by bending, ensure that the overall structure of the FPC antenna maintains the designed shape, and avoid impedance change or radiation direction offset caused by the position offset of the FPC antenna, thereby resulting in a decline in antenna performance.

[0012] The above general description and the following description are only exemplary and explanatory, and are not used to limit this application. Description of the Drawings

[0013] One or more embodiments are exemplarily illustrated by corresponding drawings. These exemplary illustrations and the drawings do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation, and wherein: Figure 1 is a schematic cross-sectional view of a wide-band FPC antenna provided by an embodiment of the present disclosure; Figure 2 is a general schematic view of a wide-band FPC antenna provided by an embodiment of the present disclosure; Figure 3 is a schematic view of the feeding point structure of a wide-band FPC antenna provided by an embodiment of the present disclosure; Figure 4 is a schematic view of the radiation part structure of a wide-band FPC antenna provided by an embodiment of the present disclosure; Figure 5 is a schematic view of the first radiation part structure of a wide-band FPC antenna provided by an embodiment of the present disclosure; Figure 6 is a schematic view of the second radiation part structure of a wide-band FPC antenna provided by an embodiment of the present disclosure; Figure 7 is a schematic view of the third radiation part structure of a wide-band FPC antenna provided by an embodiment of the present disclosure; Figure 8 is a schematic view of the fourth radiation part structure of a wide-band FPC antenna provided by an embodiment of the present disclosure; Figure 9 is a general schematic view of the positioning part of a wide-band FPC antenna provided by an embodiment of the present disclosure; Figure 10 is a schematic view of the positioning part structure of a wide-band FPC antenna provided by an embodiment of the present disclosure; Figure 11 is a schematic view of the radiation interval structure of a wide-band FPC antenna provided by an embodiment of the present disclosure; Reference numerals: 10: Copper foil layer; 20: Black oil layer; 30: AD adhesive layer; 40: PI base layer; 50: 3M adhesive layer; 60: Release paper layer; 70: Feeding point; 80: Radiation unit part; 90: Positioning part; 100: Radiation interval; 110: First feeding point; 120: Second feeding point; 130: First radiation part; 140: Second radiation part; 150: Third radiation part; 160: Fourth radiation part; 170: First radiation unit; 180: Second radiation unit; 190: Third radiation unit; 200: Fourth radiation unit; 210: Fifth radiation unit; 220: Sixth radiation unit; 230: Seventh radiation unit; 240: Eighth radiation unit; 250: Ninth radiation unit; 260: Tenth radiation unit; 270: Eleventh radiation unit; 280: Twelfth radiation unit; 290: Thirteenth radiation unit; 300: Fourteenth radiation unit; 310: Fifteenth radiation unit; 320: Sixteenth radiation unit; 330: Seventeenth radiation unit; 340: Eighteenth radiation unit; 350: Nineteenth radiation unit; 360: Twentieth radiation unit; 370: Twenty - first radiation unit; 380: Twenty - second radiation unit; 390: Twenty - third radiation unit; 400: Twenty - fourth radiation unit; 410: Twenty - fifth radiation unit; 420: Twenty - sixth radiation unit; 430: Twenty - seventh radiation unit; 440: Twenty - eighth radiation unit; 450: Twenty - ninth radiation unit; 460: Thirtieth radiation unit; 470: Thirty - first radiation unit; 480: Thirty - second radiation unit; 490: Thirty - third radiation unit; 500: Thirty - fourth radiation unit; 510: Thirty - fifth radiation unit; 520: Thirty - sixth radiation unit; 530: Thirty - seventh radiation unit; 540: Thirty - eighth radiation unit; 550: Thirty - ninth radiation unit; 560: Fortieth radiation unit; 570: Forty - first radiation unit; 580: Forty - second radiation unit; 590: Forty - third radiation unit; 600: Forty - fourth radiation unit; 610: Forty - fifth radiation unit; 620: Forty - sixth radiation unit; 630: Forty - seventh radiation unit; 640: Forty - eighth radiation unit; 650: Forty - ninth radiation unit; 660: Fiftieth radiation unit; 670: Fifty - first radiation unit; 680: Fifty - second radiation unit; 690: Fifty - third radiation unit; 700: Fifty - fourth radiation unit; 710: Fifty - fifth radiation unit; 720: Fifty - sixth radiation unit; 730: Fifty - seventh radiation unit; 740: Fifty - eighth radiation unit; 750: Fifty - ninth radiation unit; 760: Sixtieth radiation unit; 770: Sixty - first radiation unit; 780: Sixty - second radiation unit; 790: Sixty - third radiation unit; 800: Sixty - fourth radiation unit; 810: Sixty - fifth radiation unit; 820: Sixty - sixth radiation unit; 830: Sixty - seventh radiation unit; 840: Sixty - eighth radiation unit; 850: First positioning part;860: Second positioning portion; 870: First positioning point; 880: Second positioning point; 890: Third positioning point; 900: Fourth positioning point; 910: Fifth positioning point; 920: Sixth positioning point; 930: Seventh positioning point; 940: Eighth positioning point; 950: Ninth positioning point; 960: Tenth positioning point; 970: First radiation interval; 980: Second radiation interval; 990: Third radiation interval; 1000: Fourth radiation interval. Detailed implementation manners

[0014] In order to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are only for reference and illustration purposes and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, multiple details are provided to provide a full understanding of the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices can be shown in a simplified manner.

[0015] In the embodiments of the present disclosure, terms such as "first" and "second" in the description and claims of the present disclosure and the above-mentioned accompanying drawings are used to distinguish similar objects and do not have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to implement the embodiments of the present disclosure described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0016] In the embodiments of the present disclosure, the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "middle", "outer", "front", and "rear" is based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly used to better describe the embodiments of the present disclosure and their embodiments, and are not used to limit that the indicated device, element, or component must have a specific orientation or be constructed and operated in a specific orientation. And, in addition to being able to represent an orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0017] In addition, the terms "arrange", "connect", and "fix" should be understood in a broad sense. For example, "connect" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0018] Unless otherwise specified, the term "plural" means two or more.

[0019] In the embodiments of the present disclosure, the character " / " indicates that the objects before and after are in an "or" relationship. For example, A / B means: A or B.

[0020] The term "and / or" is an associative relationship describing an object, indicating that three relationships can exist. For example, A and / or B means: A or B, or, the three relationships of A and B.

[0021] It should be noted that, without conflict, the embodiments in the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

[0022] Currently, the FPC antenna has problems such as increased energy transmission loss, shortened communication distance, and increased bit error rate. The FPC antenna is prone to impedance change of the FPC antenna or radiation direction offset caused by position offset in vibration, shock, or multi-degree-of-freedom bending scenarios, resulting in a decline in antenna performance.

[0023] Combined Figure 1-2 、 Figure 4 and Figure 11 As shown in a black oil layer 20, disposed below the copper foil layer 10; an AD adhesive layer 30, the AD adhesive layer 30 is disposed below the black oil layer 20; a PI base layer 40, the PI base layer 40 is disposed below the AD adhesive layer 30; a 3M adhesive layer 50, the 3M adhesive layer 50 is disposed below the PI base layer 40; a release paper layer 60, the release paper layer 60 is disposed below the 3M adhesive layer 50; a radiation unit part 80, disposed on the copper foil layer 10, including a first radiation part 130, a second radiation part 140, a third radiation part 150, and a fourth radiation part 160; a radiation interval 100, disposed between adjacent two radiation parts, including a first radiation interval 970, a second radiation interval 980, a third radiation interval 990, and a fourth radiation interval 1000; a positioning part 90, disposed between the first radiation part 130 and the second radiation part 140, and between the third radiation part 150 and the fourth radiation part 160; a feeding point 70, the radiation unit part 80 is connected to the feeding point 70.

[0024] Adopting a wide-band FPC antenna provided by an embodiment of the present disclosure, by setting a first radiation portion 130, a second radiation portion 140, a third radiation portion 150, and a fourth radiation portion 160, a multi-band cooperative radiation structure is formed by the radiation unit portion 80. The design of the multi-radiation portion of the FPC antenna can cover a wider frequency range, avoid impedance mismatch caused by frequency offset of a single radiation unit, thereby reducing the energy transmission loss of the FPC antenna, improving the effective radiation power of the FPC antenna, effectively increasing the communication distance of the FPC antenna, and reducing the bit error rate of the FPC antenna.

[0025] By disposing the positioning portion 90 between the first radiation portion 130 and the second radiation portion 140, and between the third radiation portion 150 and the fourth radiation portion 160, the positioning portion 90 forms a physical limiting structure. When the FPC antenna is subjected to vibration, impact, or multi-degree-of-freedom bending, the positioning portion 90 can limit the relative displacement of each radiation portion, prevent the dislocation of the radiation unit caused by bending, ensure that the overall structure of the FPC antenna maintains the designed form, and avoid impedance changes or radiation direction offsets caused by the position offset of the FPC antenna, thereby resulting in a decline in antenna performance.

[0026] Combined Figure 2-4 As shown, optionally, the feeding point 70 includes a first feeding point 110 and a second feeding point 120. The feeding point 70 is rectangular. The first radiation portion 130 is connected to the upper part of the first feeding point 110, the third radiation portion 150 is connected to the lower part of the first feeding point 110, and the first radiation portion 130 and the third radiation portion 150 are symmetric about the first radiation interval 970; The second radiation portion 140 is connected to the upper part of the second feeding point 120, the fourth radiation portion 160 is connected to the lower part of the second feeding point 120, and the second radiation portion 140 and the fourth radiation portion 160 are symmetric about the third radiation interval 990.

[0027] The feeding point 70 includes two independent feeding positions, namely the first feeding point 110 and the second feeding point 120, which are respectively connected to the first radiation portion 130, the second radiation portion 140, the third radiation portion 150, and the fourth radiation portion 160. The design of the dual feeding point is equivalent to introducing two independent signal input ports on the antenna. One feeding point can respectively excite two groups of radiation units. The radiation units of the first radiation portion 130 and the second radiation portion 140 are one group, and the radiation units of the third radiation portion 150 and the fourth radiation portion 160 are another group. This multi-feeding point structure can cover a wider frequency range. The radiation units excited by different feeding points can resonate in different frequency bands. The first feeding point 110 excites the low frequency band, and the second feeding point 120 excites the high frequency band, thereby expanding the effective working bandwidth of the antenna, avoiding the impedance mismatch problem caused by frequency offset of a single feeding point, reducing the energy transmission loss, improving the effective radiation power, thereby increasing the communication distance of the FPC antenna and reducing the bit error rate of the FPC antenna.

[0028] The first radiation part 130 is connected to the upper part of the first feeding point 110, and the third radiation part 150 is connected to the lower part of the first feeding point 110. Similarly, the second radiation part 140 is connected to the upper part of the second feeding point 120, and the fourth radiation part 160 is connected to the lower part of the second feeding point 120. This upper and lower symmetric connection method makes the positions of each group of radiation units symmetric with respect to the feeding point, and the lengths of the electromagnetic coupling paths are the same, thus balancing the impedance characteristics of the two groups of radiation units. The symmetric structure can effectively suppress signal reflection caused by impedance mismatch, improve the energy transmission efficiency between the antenna and the RF circuit, reduce energy loss during transmission, and further extend the communication distance and reduce the bit error rate.

[0029] The feeding point 70 adopts a rectangular structure. Compared with the traditional circular or narrow strip feeding point, the contact area between the feeding point 70 and the radiation unit part 80 is larger. The larger contact area can improve the mechanical connection reliability between the feeding point 70 and the external circuit, make the crimping more firm, reduce the problems of the feeding point falling off and loosening caused by vibration, impact or bending, avoid signal transmission interruption or performance attenuation caused by connection failure, and further improve the effective radiation power, extend the communication distance and reduce the bit error rate.

[0030] Optionally, the frequency range of the FPC antenna is 433 MHz - 915 MHz, and the center frequency point is 650 MHz.

[0031] Combined Figure 3-5 As shown, optionally, the first radiation part 130 includes the first radiation unit 170, the second radiation unit 180, the third radiation unit 190, the fourth radiation unit 200, the fifth radiation unit 210, the sixth radiation unit 220, the seventh radiation unit 230, the eighth radiation unit 240, the ninth radiation unit 250, the tenth radiation unit 260, the eleventh radiation unit 270, the twelfth radiation unit 280, the thirteenth radiation unit 290, the fourteenth radiation unit 300, the fifteenth radiation unit 310, the sixteenth radiation unit 320 and the seventeenth radiation unit 330 which are connected in sequence. The first radiation unit 170 is connected to the upper part of the first feeding point 110. Two adjacent radiation units of the first radiation part 130 are perpendicular to each other, and the radiation units of the first radiation part 130 are in a folded shape.

[0032] The first radiation part 130 contains 17 radiation units that are connected in sequence and adjacent perpendicularly, and is in a folded shape as a whole. By means of the folding form, the effective electrical length of the radiation units is greatly increased in a limited space, enabling it to match the electrical length requirements of the 433 MHz - 915 MHz wide frequency band. The low frequency band of 433 MHz corresponds to about a quarter wavelength, and the high frequency band of 915 MHz corresponds to about an eighth wavelength, covering the entire working bandwidth of the FPC antenna, avoiding impedance mismatch caused by frequency offset at a single resonance point, thereby reducing energy transmission loss, improving the effective radiation power, extending the communication distance and reducing the bit error rate.

[0033] The vertical connection between adjacent radiation units of the FPC antenna changes the current flow path, causing the current to be distributed in a serpentine shape rather than a straight line within the radiation unit. This can effectively suppress the concentration of current on the surface of the radiation unit and reduce the ohmic loss in the high-frequency band. The unit structure with vertical connections cancels out the components of the current in different directions, reducing the energy leakage in non-main radiation directions, further improving the energy radiation efficiency, thereby enhancing the effective radiation power, extending the communication distance, and reducing the bit error rate.

[0034] Seventeen adjacent vertical radiation units support each other through connection points to form a grid-like rigid structure. When the FPC antenna is subjected to vibration, shock, or bending, the vertically connected radiation units can disperse external stress through mutually restrictive mechanical transmission. The bending moment at a certain point due to impact is offset by the reverse stress of adjacent radiation units, reducing local deformation such as wrinkles or twists, thus maintaining the geometric stability of the overall structure of the FPC antenna, ensuring that the overall structure of the FPC antenna maintains the designed shape, and avoiding impedance mismatch or radiation direction deviation caused by position offset, which may lead to a decline in antenna performance.

[0035] The radiation units of the first radiation part 130 have a folded-back structure, which makes the mass distribution more uniform, and the center of gravity is near the geometric center of the first radiation part 130. In a vibration or shock scenario, the uniform mass distribution of the first radiation part 130 can reduce the structural torsion or offset caused by the shift of the center of gravity. When the FPC antenna is subjected to horizontal vibration, the folded-back radiation units can balance the inertial force through the left-right symmetric unit layout, avoiding the overall displacement caused by excessive mass on one side, thus maintaining the relative position stability with the mounting carrier and avoiding impedance changes or radiation direction deviation caused by position offset, which may lead to a decline in antenna performance.

[0036] Combined Figure 3-4 and Figure 6 As shown, optionally, the second radiation part 140 includes the eighteenth radiation unit 340, the nineteenth radiation unit 350, the twentieth radiation unit 360, the twenty-first radiation unit 370, the twenty-second radiation unit 380, the twenty-third radiation unit 390, the twenty-fourth radiation unit 400, the twenty-fifth radiation unit 410, the twenty-sixth radiation unit 420, the twenty-seventh radiation unit 430, the twenty-eighth radiation unit 440, the twenty-ninth radiation unit 450, the thirtieth radiation unit 460, the thirty-first radiation unit 470, the thirty-second radiation unit 480, the thirty-third radiation unit 490, and the thirty-fourth radiation unit 500 connected in sequence. The eighteenth radiation unit 340 is connected above the second feeding point 120. The two adjacent radiation units of the second radiation part 140 are perpendicular to each other, and the radiation units of the second radiation part 140 are in a folded-back shape.

[0037] The second radiation part 140 includes 17 sequentially connected and adjacent vertical radiation units, which are overall in a folded shape. By means of the folding form, the effective electrical length of the radiation units is greatly increased within a limited space, enabling it to match the electrical length requirements of the wide frequency band from 433 MHz to 915 MHz. The low-frequency band of 433 MHz corresponds to approximately 1 / 4 wavelength, and the high-frequency band of 915 MHz corresponds to approximately 1 / 8 wavelength, covering the entire working bandwidth of the FPC antenna, avoiding impedance mismatch caused by frequency deviation at a single resonance point, thereby reducing energy transmission loss, enhancing the effective radiation power, extending the communication distance, and reducing the bit error rate.

[0038] The vertical connection between adjacent radiation units of the FPC antenna changes the current flow path, making the current distributed in a serpentine shape rather than a straight line within the radiation units, which can effectively suppress the concentration of current on the surface of the radiation units and reduce the ohmic loss in the high-frequency band. The structure of the vertically connected radiation units cancels out the components of the current in different directions, reducing the energy leakage in the non-main radiation direction, further enhancing the energy radiation efficiency, thereby enhancing the effective radiation power, extending the communication distance, and reducing the bit error rate.

[0039] The 17 adjacent vertical radiation units support each other through connection points, forming a grid-like rigid structure. When the FPC antenna is subjected to vibration, shock, or bending, the vertically connected radiation units can disperse external stress through the mechanical transfer of mutual restraint. The bending moment at a certain point due to impact is offset by the reverse stress of adjacent radiation units, reducing local deformation such as wrinkles or twists, thereby maintaining the geometric stability of the overall structure of the FPC antenna, ensuring that the overall structure of the FPC antenna maintains the designed form, and avoiding impedance mismatch or radiation direction deviation caused by position offset, which may lead to a decline in antenna performance.

[0040] The folded structure of the radiation units of the second radiation part 140 makes the mass distribution more uniform, and the center of gravity is near the geometric center of the second radiation part 140. In the scenario of vibration or shock, the uniform mass distribution of the second radiation part 140 can reduce the structural torsion or offset caused by the offset of the center of gravity. When the antenna is subjected to horizontal vibration, the folded radiation units can balance the inertial force through the left-right symmetric unit layout, avoiding the overall displacement caused by excessive mass on one side, thereby maintaining the relative position stability with the mounting carrier and avoiding impedance change or radiation direction deviation caused by position offset, which may lead to a decline in antenna performance.

[0041] Combined Figure 3-4 and Figure 7As shown, optionally, the third radiation part 150 includes the thirty-fifth radiation unit 510, the thirty-sixth radiation unit 520, the thirty-seventh radiation unit 530, the thirty-eighth radiation unit 540, the thirty-ninth radiation unit 550, the fortieth radiation unit 560, the forty-first radiation unit 570, the forty-second radiation unit 580, the forty-third radiation unit 590, the forty-fourth radiation unit 600, the forty-fifth radiation unit 610, the forty-sixth radiation unit 620, the forty-seventh radiation unit 630, the forty-eighth radiation unit 640, the forty-ninth radiation unit 650, the fiftieth radiation unit 660, and the fifty-first radiation unit 670, which are connected in sequence. The thirty-fifth radiation unit 510 is connected to the lower part of the first feeding point 110. Two adjacent radiation units of the third radiation part 150 are perpendicular to each other, and the radiation units of the third radiation part 150 are in a folded shape.

[0042] The third radiation part 150 includes 17 radiation units that are connected in sequence and adjacent to each other perpendicularly, and is in a folded shape as a whole. By means of the folding form, the effective electrical length of the radiation units is greatly increased in a limited space, enabling it to match the electrical length requirements of the 433 MHz - 915 MHz wide frequency band. The low-frequency band of 433 MHz corresponds to about 1 / 4 wavelength, and the high-frequency band of 915 MHz corresponds to about 1 / 8 wavelength, covering the entire operating bandwidth of the FPC antenna, avoiding impedance mismatch caused by frequency offset at a single resonance point, thereby reducing the energy transmission loss of the FPC antenna, improving the effective radiation power, extending the communication distance, and reducing the bit error rate.

[0043] The perpendicular connection between adjacent radiation units of the FPC antenna changes the current flow path, making the current distributed in a serpentine shape rather than a straight line within the radiation units. This design can effectively suppress the concentration of current on the surface of the radiation units and reduce the ohmic loss in the high-frequency band. The structure of the perpendicularly connected radiation units cancels out the components of the current in different directions, reducing the energy leakage in the non-main radiation direction, further improving the energy radiation efficiency, thereby improving the effective radiation power, extending the communication distance, and reducing the bit error rate.

[0044] The 17 adjacent and perpendicular radiation units support each other through connection points to form a grid-like rigid structure. When the FPC antenna is subjected to vibration, shock, or bending, the perpendicularly connected radiation units can disperse external stress through the mutually restrictive mechanical transmission. The bending moment of a certain point of the FPC antenna subjected to impact is offset by the reverse stress of the adjacent radiation units, reducing local deformation such as wrinkles or twists, thereby maintaining the geometric stability of the overall structure of the FPC antenna, ensuring that the overall structure of the FPC antenna maintains the designed shape, and avoiding impedance mismatch or radiation direction offset caused by position deviation, which may lead to a decline in antenna performance.

[0045] The radiation units of the third radiation part 150 are in a folded structure, which makes the mass distribution more uniform, and the center of gravity is near the geometric center of the third radiation part 150. In the vibration or shock scenario, the uniform mass distribution of the third radiation part 150 can reduce the structural torsion or deviation caused by the center of gravity shift. When the FPC antenna is vibrated in the horizontal direction, the folded radiation part can balance the inertial force through the left-right symmetric unit layout, avoid the overall displacement caused by excessive mass on one side, so as to keep the relative position of the FPC antenna and the mounting carrier stable, and avoid the impedance change or radiation direction deviation caused by the position shift, thus resulting in the degradation of the antenna performance.

[0046] Combined Figure 3-4 with Figure 8 As shown, optionally, the fourth radiation part 160 includes the fifty-second radiation unit 680, the fifty-third radiation unit 690, the fifty-fourth radiation unit 700, the fifty-fifth radiation unit 710, the fifty-sixth radiation unit 720, the fifty-seventh radiation unit 730, the fifty-eighth radiation unit 740, the fifty-ninth radiation unit 750, the sixtieth radiation unit 760, the sixty-first radiation unit 770, the sixty-second radiation unit 780, the sixty-third radiation unit 790, the sixty-fourth radiation unit 800, the sixty-fifth radiation unit 810, the sixty-sixth radiation unit 820, the sixty-seventh radiation unit 830 and the sixty-eighth radiation unit 840 connected in sequence. The fifty-second radiation unit 680 is connected to the lower part of the second feeding point 120. The two adjacent radiation units of the fourth radiation part 160 are perpendicular to each other, and the radiation units of the fourth radiation part 160 are in a folded shape.

[0047] The fourth radiation part 160 contains 17 radiation units connected in sequence and adjacent perpendicularly, and is in a folded shape as a whole. By means of the folding form, the effective electrical length of the radiation units is greatly increased in a limited space, so that it can match the electrical length requirements of the 433 MHz - 915 MHz wide frequency band. The low frequency band 433 MHz corresponds to about 1 / 4 wavelength, and the high frequency band 915 MHz corresponds to about 1 / 8 wavelength, covering the entire working bandwidth of the FPC antenna, avoiding the impedance mismatch caused by the frequency shift of a single resonance point, thereby reducing the energy transmission loss, improving the effective radiation power, extending the communication distance and reducing the bit error rate.

[0048] The vertical connection between adjacent radiation units changes the current flow path, making the current distributed in a serpentine shape rather than a straight line in the radiation units. This design can effectively suppress the concentration of current on the surface of the copper foil layer and reduce the ohmic loss in the high frequency band. The unit structure with vertical connection cancels out the components of the current in different directions, reduces the energy leakage to the non-main radiation direction, further improves the energy radiation efficiency, and then improves the effective radiation power, extends the communication distance and reduces the bit error rate.

[0049] Seventeen adjacent vertical radiating elements support each other through connection points, forming a grid-like rigid structure. When the FPC antenna is subjected to vibration, impact, or bending, the vertically connected elements disperse the external stress through mutually constrained mechanical transmission. The bending moment caused by an impact at one point is offset by the opposing stress of adjacent elements, reducing local deformation such as wrinkles or twisting, thereby maintaining the geometric stability of the overall structure and ensuring that the FPC antenna maintains its designed form. This avoids impedance mismatch or radiation direction deviation caused by positional offset, which can lead to degraded antenna performance.

[0050] The radiating elements of the fourth radiating section 160 have a folded-back structure, resulting in a more uniform mass distribution, with the center of gravity located near the geometric center of the fourth radiating section 160. In vibration or impact scenarios, the uniform mass distribution of the fourth radiating section 160 reduces structural torsion or shifting due to a shifted center of gravity. When the antenna is subjected to horizontal vibration, the folded-back radiating section balances inertial forces through the bilaterally symmetrical layout of the radiating elements, preventing overall displacement caused by excessive mass on one side. This maintains the relative position of the FPC antenna to the mounting substrate, preventing impedance changes or radiation direction shifts caused by the FPC antenna's positional shift, which could degrade antenna performance.

[0051] Combine Figure 2 and Figure 9-10 As shown, optionally, the positioning portion 90 includes a first positioning portion 850 and a second positioning portion 860. The first positioning portion 850 is disposed between the first radiating portion 130 and the second radiating portion 140. The first positioning portion 850 includes a first positioning point 870, a second positioning point 880, a third positioning point 890, a fourth positioning point 900, and a fifth positioning point 910. The distance between two adjacent positioning points of the first positioning portion 850 is the same. The second positioning portion 860 is arranged between the third radiating portion 150 and the fourth radiating portion 160. The second positioning portion 860 includes a sixth positioning point 920, a seventh positioning point 930, an eighth positioning point 940, a ninth positioning point 950 and a tenth positioning point 960. The distance between two adjacent positioning points of the second positioning portion 860 is the same.

[0052] Traditional FPC antennas with a single or small number of anchor points can break or become debonded due to excessive local stress when subjected to strong vibration or impact, causing the FPC antenna to lose its restraint function. The first and second anchor portions 850 and 860 contain five equally spaced anchor points, forming a multi-point redundant restraint structure. Even if some of these anchor points fail slightly due to external forces, the remaining anchor points can still maintain the relative position stability of the four radiating elements through the evenly distributed restraining force, preventing overall structural shift caused by the failure of some anchor points, and preventing impedance changes or radiation direction shifts caused by positional shifts, which could lead to degraded antenna performance.

[0053] The first positioning part 850 is arranged between the first radiation part 130 and the second radiation part 140 and includes 5 equally spaced positioning points. The second positioning part 860 is arranged between the third radiation part 150 and the fourth radiation part 160 and includes 5 equally spaced positioning points. By the equally spaced positioning points, the distance between adjacent positioning points is the same, and a uniform mechanical support network can be formed between the radiation parts. When the FPC antenna is subjected to vibration, impact or multi-degree-of-freedom bending, the external stress will be evenly transmitted to adjacent radiation units through the positioning points, avoiding stress concentration in a certain local area. The uniform stress distribution can effectively inhibit the local deformation of the radiation unit, ensure that the overall electrical length of the folded radiation part remains the designed value, and the constraint of the equally spaced positioning points can prevent the shortening or extension of the total electrical length caused by deformation, thereby avoiding impedance mismatch caused by electrical length mismatch, reducing energy transmission loss, improving the effective radiation power, extending the communication distance and reducing the bit error rate.

[0054] Combined Figure 2 As shown, optionally, the width of the radiation unit of the radiation unit part 80 is 0.5 mm, and the material is single-sided electrolytic copper foil.

[0055] The embodiment of the present disclosure provides a collection and transmission integrated machine, including a wide-band FPC antenna in the foregoing embodiment.

[0056] The above description and the drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural and other changes. The embodiments only represent possible variations. Unless explicitly required, the individual components and functions are optional, and the order of operations can vary. Some parts and features of some embodiments can be included in or replaced by parts and features of other embodiments. The embodiments of the present disclosure are not limited to the structures already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A wide-band FPC antenna, characterized in that, Comprising: A copper foil layer, the copper foil layer comprising a radiation unit part; A black oil layer, disposed below the copper foil layer; An AD adhesive layer, the AD adhesive layer disposed below the black oil layer; A PI base layer, the PI base layer disposed below the AD adhesive layer; A 3M adhesive layer, the 3M adhesive layer disposed below the PI base layer; A release paper layer, the release paper layer disposed below the 3M adhesive layer; A radiation unit part, disposed on the copper foil layer, including a first radiation part, a second radiation part, a third radiation part, and a fourth radiation part; Radiation intervals, disposed between adjacent two radiation parts, including a first radiation interval, a second radiation interval, a third radiation interval, and a fourth radiation interval; Positioning parts, disposed between the first radiation part and the second radiation part, and between the third radiation part and the fourth radiation part; Feeding points, the radiation unit part being connected to the feeding points.

2. The broadband FPC antenna according to claim 1, characterized in that The feeding points include a first feeding point and a second feeding point, the feeding points are rectangular, the first radiation part is connected to the upper part of the first feeding point, the third radiation part is connected to the lower part of the first feeding point, and the first radiation part and the third radiation part are symmetrical about the first radiation interval; The second radiation part is connected to the upper part of the second feeding point, the fourth radiation part is connected to the lower part of the second feeding point, and the second radiation part and the fourth radiation part are symmetrical about the third radiation interval.

3. A broadband FPC antenna according to claim 1, characterized in that The frequency range of the FPC antenna is 433 MHz - 915 MHz, and the center frequency point is 650 MHz.

4. A wideband FPC antenna according to claim 1, characterized in that, The first radiation part includes a first radiation unit, a second radiation unit, a third radiation unit, a fourth radiation unit, a fifth radiation unit, a sixth radiation unit, a seventh radiation unit, an eighth radiation unit, a ninth radiation unit, a tenth radiation unit, an eleventh radiation unit, a twelfth radiation unit, a thirteenth radiation unit, a fourteenth radiation unit, a fifteenth radiation unit, a sixteenth radiation unit, and a seventeenth radiation unit connected in sequence. The first radiation unit is connected to the upper part of the first feeding point. The adjacent two radiation units of the first radiation part are perpendicular to each other, and the radiation units of the first radiation part are in a folded shape.

5. The wideband FPC antenna according to claim 1, characterized in that, The second radiation part includes an eighteenth radiation unit, a nineteenth radiation unit, a twentieth radiation unit, a twenty - first radiation unit, a twenty - second radiation unit, a twenty - third radiation unit, a twenty - fourth radiation unit, a twenty - fifth radiation unit, a twenty - sixth radiation unit, a twenty - seventh radiation unit, a twenty - eighth radiation unit, a twenty - ninth radiation unit, a thirtieth radiation unit, a thirty - first radiation unit, a thirty - second radiation unit, a thirty - third radiation unit, and a thirty - fourth radiation unit connected in sequence. The eighteenth radiation unit is connected to the upper part of the second feeding point. The adjacent two radiation units of the second radiation part are perpendicular to each other, and the radiation units of the second radiation part are in a folded shape.

6. The broadband FPC antenna according to claim 1, characterized in that, The third radiation part includes a thirty-fifth radiation unit, a thirty-sixth radiation unit, a thirty-seventh radiation unit, a thirty-eighth radiation unit, a thirty-ninth radiation unit, a fortieth radiation unit, a forty-first radiation unit, a forty-second radiation unit, a forty-third radiation unit, a forty-fourth radiation unit, a forty-fifth radiation unit, a forty-sixth radiation unit, a forty-seventh radiation unit, a forty-eighth radiation unit, a forty-ninth radiation unit, a fiftieth radiation unit, and a fifty-first radiation unit that are connected in sequence. The thirty-fifth radiation unit is connected to the lower part of the first feeding point. The two adjacent radiation units of the third radiation part are perpendicular to each other, and the radiation units of the third radiation part are in a folded shape.

7. The wideband FPC antenna according to claim 1, characterized in that, The fourth radiation part includes a fifty-second radiation unit, a fifty-third radiation unit, a fifty-fourth radiation unit, a fifty-fifth radiation unit, a fifty-sixth radiation unit, a fifty-seventh radiation unit, a fifty-eighth radiation unit, a fifty-ninth radiation unit, a sixtieth radiation unit, a sixty-first radiation unit, a sixty-second radiation unit, a sixty-third radiation unit, a sixty-fourth radiation unit, a sixty-fifth radiation unit, a sixty-sixth radiation unit, a sixty-seventh radiation unit, and a sixty-eighth radiation unit that are connected in sequence. The fifty-second radiation unit is connected to the lower part of the second feeding point. The two adjacent radiation units of the fourth radiation part are perpendicular to each other, and the radiation units of the fourth radiation part are in a folded shape.

8. A broadband FPC antenna according to claim 1, characterized in that, The positioning part includes a first positioning part and a second positioning part. The first positioning part is arranged between the first radiation part and the second radiation part. The first positioning part includes a first positioning point, a second positioning point, a third positioning point, a fourth positioning point, and a fifth positioning point. The distances between two adjacent positioning points of the first positioning part are the same. The second positioning part is arranged between the third radiation part and the fourth radiation part. The second positioning part includes a sixth positioning point, a seventh positioning point, an eighth positioning point, a ninth positioning point, and a tenth positioning point. The distances between two adjacent positioning points of the second positioning part are the same.

9. The wideband FPC antenna according to claim 1, wherein The width of the radiation unit of the radiation unit part is 0.5 mm, and the material is single-sided electrolytic copper foil.

10. An acquisition and transmission integrated machine, characterized in that, It includes a wide-band FPC antenna according to any one of claims 1 to 9.

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