A broadband FPC antenna and a collection and transmission all-in-one machine

Abstract

The application relates to the technical field of wireless communication, and discloses a wide-band FPC antenna. The wide-band FPC antenna comprises a copper foil layer, a black oil layer, an AD glue layer, a PI base layer, a 3M glue layer, a release paper layer, a radiation unit part arranged on the copper foil layer and comprising first to fourth radiation parts, radiation intervals comprising first to fourth radiation intervals, a positioning part arranged between the first and second radiation parts and the third and fourth radiation parts, and a feeding point, wherein the radiation unit part is connected to the feeding point. The radiation unit part forms a multi-band cooperative radiation structure, the design of the multiple radiation parts of the FPC antenna covers a wider frequency range, impedance mismatch caused by frequency deviation of a single radiation unit is avoided, energy transmission loss is reduced, effective radiation power is improved, communication distance is effectively increased, and the error code rate is reduced. The positioning part limits the relative displacement of the radiation parts, avoids changes in the antenna impedance or deviation of the radiation direction, and thus prevents the performance of the antenna from being reduced. The application further discloses a collection and transmission integrated machine.

Description

Technical Field

[0001] This application relates to the field of wireless communication technology, such as a wideband FPC antenna and an integrated data acquisition and transmission device. Background Technology

[0002] With the rapid development of emerging technologies such as the Internet of Things (IoT), the need for wireless devices to support multiple protocols and frequency band compatibility is becoming increasingly urgent. Some IoT devices need to simultaneously support low-power wide-area network (LPWAN) bands such as Bluetooth (2.4GHz), ZigBee (2.4GHz / 915MHz), and LoRa (868MHz / 915MHz), placing higher demands on the wideband coverage capabilities of antennas.

[0003] Traditional narrowband antennas are insufficient to meet the "one device, multiple frequencies" requirement. Wideband antennas, by extending the operating frequency band, can significantly reduce the number of antennas in a device, simplifying hardware design and becoming a key support for the miniaturization and integration of wireless communication terminals. Traditional rigid antennas, due to their high rigidity, large weight, and difficulty in fitting curved surfaces, are no longer suitable for flexible electronic scenarios.

[0004] Flexible printed circuit (FPC) antennas use flexible printed circuit boards as a carrier and fabricate antenna patterns through printing processes. They offer advantages such as flexibility, foldability, thinness, and light weight, and can be conformally integrated with flexible substrates, making them an ideal antenna solution for flexible electronic devices. However, the flexibility of FPCs and the high loss of the material itself pose challenges to the wideband performance of the antennas.

[0005] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art: Increased energy transmission loss in FPC antennas leads to shorter communication distances and higher bit error rates. In scenarios involving vibration, impact, or multi-degree-of-freedom bending, FPC antennas are prone to positional shifts that cause changes in antenna impedance or radiation direction, resulting in decreased antenna performance. Utility Model Content

[0006] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0007] This disclosure provides a wideband FPC antenna and an integrated acquisition and transmission device to solve the problems of unstable wideband impedance matching and reduced efficiency caused by dielectric loss in FPC antennas under bending conditions.

[0008] In some embodiments, the broadband FPC antenna includes: A copper foil layer, the copper foil layer comprising a radiating unit portion; A black oil layer is disposed below the copper foil layer; AD adhesive layer, wherein the AD adhesive layer is disposed below the black oil layer; PI base layer, wherein the PI base layer is disposed below the AD adhesive layer; A 3M adhesive layer is disposed on the underside of the PI substrate; Release paper layer, the release paper layer being disposed below the 3M adhesive layer; A radiating unit section is disposed on the copper foil layer, including a first radiating section, a second radiating section, a third radiating section and a fourth radiating section; A radiation interval is provided between two adjacent radiating parts, including a first radiation interval, a second radiation interval, a third radiation interval, and a fourth radiation interval; A positioning part is disposed between the first radiating part and the second radiating part, and between the third radiating part and the fourth radiating part; The radiating unit is connected to the feed point.

[0009] In some embodiments, the integrated acquisition and transmission device includes: The aforementioned embodiment describes a wideband FPC antenna.

[0010] The broadband FPC antenna and integrated data acquisition and transmission unit provided in this disclosure can achieve the following technical effects: The wideband FPC antenna provided in this disclosure, by setting a first radiating part, a second radiating part, a third radiating part, and a fourth radiating part, forms a multi-band cooperative radiation structure. The multi-radiating part design of the FPC antenna can cover a wider frequency range, avoid impedance mismatch caused by frequency shift of a single radiating element, thereby reducing the energy transmission loss of the FPC antenna, increasing 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 placing the positioning part between the first and second radiating parts, and between the third and fourth radiating parts, a physical limiting 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 radiating part, prevent the radiating element from being misaligned due to bending, ensure that the overall structure of the FPC antenna maintains its design shape, and avoid impedance changes or radiation direction shifts caused by FPC antenna position shifts, thereby preventing antenna performance degradation.

[0012] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0013] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein: Figure 1 This is a cross-sectional schematic diagram of a broadband FPC antenna provided in an embodiment of this disclosure; Figure 2 This is a general schematic diagram of a broadband FPC antenna provided in an embodiment of this disclosure; Figure 3 This is a schematic diagram of the feed point structure of a broadband FPC antenna provided in an embodiment of this disclosure; Figure 4 This is a schematic diagram of the radiating section structure of a broadband FPC antenna provided in an embodiment of this disclosure; Figure 5 This is a schematic diagram of the first radiating part of a broadband FPC antenna provided in an embodiment of this disclosure; Figure 6 This is a schematic diagram of the second radiating part structure of a broadband FPC antenna provided in an embodiment of this disclosure; Figure 7 This is a schematic diagram of the third radiating part structure of a broadband FPC antenna provided in an embodiment of this disclosure; Figure 8 This is a schematic diagram of the fourth radiating part structure of a broadband FPC antenna provided in an embodiment of this disclosure; Figure 9 This is an overall schematic diagram of the positioning part of a broadband FPC antenna provided in an embodiment of this disclosure; Figure 10 This is a schematic diagram of the positioning part structure of a broadband FPC antenna provided in an embodiment of this disclosure; Figure 11 This is a schematic diagram of the radiation spacing structure of a broadband FPC antenna provided in an embodiment of this disclosure; Figure label: 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: Feed point; 80: Radiation unit section; 90: Positioning section; 100: Radiation interval; 110: First feed point; 120: Second feed point; 130: First radiation section; 140: Second radiation section; 150: Third radiation section; 160: Fourth radiation section; 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; 2 70: 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; 47 0: Radiation Unit 31; 480: Radiation Unit 32; 490: Radiation Unit 33; 500: Radiation Unit 34; 510: Radiation Unit 35; 520: Radiation Unit 36; 530: Radiation Unit 37; 540: Radiation Unit 38; 550: Radiation Unit 39; 560: Radiation Unit 40; 570: Radiation Unit 41; 580: Radiation Unit 42; 590: Radiation Unit 43; 600: Radiation Unit 44; 610: Radiation Unit 45; 620: Radiation Unit 46; 630: Radiation Unit 47; 640: Radiation Unit 48; 650: Radiation Unit 49; 660: Radiation Unit 31; 480: Radiation Unit 32; 490: Radiation Unit 33; 500: Radiation Unit 34; 510: Radiation Unit 35; 520: Radiation Unit 36; 530: Radiation Unit 37; 540: Radiation Unit 38; 590: Radiation Unit 39; 660: Radiation Unit 31; 520: Radiation Unit 39; 660: Radiation Unit 31; 520: Radiation Unit 39; 65 ... Fifty radiation units; 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 unit;860: Second positioning point; 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

[0014] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0015] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0016] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0017] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" 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 a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0018] Unless otherwise stated, the term "multiple" means two or more.

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

[0020] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0022] Currently, FPC antennas suffer from increased energy transmission loss, shortened communication distance, and increased bit error rate. In scenarios involving vibration, impact, or multi-degree-of-freedom bending, FPC antennas are prone to positional shifts that cause changes in antenna impedance or radiation direction, leading to a decline in antenna performance.

[0023] Combination Figure 1-2 , Figure 4 and Figure 11 As shown, this embodiment of the present disclosure provides a broadband FPC antenna, including a copper foil layer 10, the copper foil layer 10 including a radiating element portion; Black oil layer 20 is disposed below copper foil layer 10; AD adhesive layer 30 is disposed below black oil layer 20; PI base layer 40 is located below AD adhesive layer 30; 3M adhesive layer 50 is disposed on the lower part of PI base layer 40; Release paper layer 60, which is disposed below 3M adhesive layer 50; The radiating unit 80 is disposed on the copper foil layer 10 and includes a first radiating part 130, a second radiating part 140, a third radiating part 150 and a fourth radiating part 160. The radiation interval 100 is disposed between two adjacent radiation sections, including a first radiation interval 970, a second radiation interval 980, a third radiation interval 990 and a fourth radiation interval 1000. The positioning part 90 is disposed between the first radiating part 130, the second radiating part 140, the third radiating part 150 and the fourth radiating part 160. Feed point 70, radiating unit 80 is connected to feed point 70.

[0024] The wideband FPC antenna provided in this embodiment of the present disclosure forms a multi-band cooperative radiation structure by setting a first radiating part 130, a second radiating part 140, a third radiating part 150, and a fourth radiating part 160. The multi-radiating part design of the FPC antenna can cover a wider frequency range, avoid impedance mismatch caused by frequency shift in a single radiating element, thereby reducing energy transmission loss, increasing the effective radiated power, effectively increasing the communication distance, and reducing the bit error rate.

[0025] By positioning the positioning part 90 between the first radiating part 130 and the second radiating part 140, and between the third radiating part 150 and the fourth radiating part 160, the positioning part 90 forms a physical limiting structure. When the FPC antenna is subjected to vibration, impact, or multi-degree-of-freedom bending, the positioning part 90 can limit the relative displacement of each radiating part, prevent misalignment of the radiating elements caused by bending, ensure that the overall structure of the FPC antenna maintains its designed shape, and avoid impedance changes or radiation direction shifts caused by FPC antenna position shifts, thereby preventing antenna performance degradation.

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

[0027] Feed point 70 includes two independent feed positions: a first feed point 110 and a second feed point 120, which are respectively connected to the first radiator 130, the second radiator 140, the third radiator 150, and the fourth radiator 160. The dual-feed point design is equivalent to introducing two independent signal input ports on the antenna. One feed point can excite two sets of radiating elements: the radiating elements of the first radiator 130 and the second radiator 140 form one set, and the radiating elements of the third radiator 150 and the fourth radiator 160 form the other set. This multi-feed point structure can cover a wider frequency range. The radiating elements excited by different feed points can resonate in different frequency bands. The first feed point 110 excites the low-frequency band, and the second feed point 120 excites the high-frequency band, thereby expanding the effective operating bandwidth of the antenna, avoiding impedance mismatch problems caused by frequency offset of a single feed point, reducing energy transmission loss, increasing effective radiated power, thereby increasing the communication distance of the FPC antenna and reducing the bit error rate of the FPC antenna.

[0028] The first radiating element 130 is connected to the upper part of the first feed point 110, and the third radiating element 150 is connected to the lower part of the first feed point 110; similarly, the second radiating element 140 is connected to the upper part of the second feed point 120, and the fourth radiating element 160 is connected to the lower part of the second feed point 120. This symmetrical connection method ensures that the position of each set of radiating elements is symmetrical with respect to the feed point, and the electromagnetic coupling path length is consistent, thereby balancing the impedance characteristics of the two sets of radiating elements. The symmetrical structure can effectively suppress signal reflection caused by impedance mismatch, improve the energy transmission efficiency of the antenna and radio frequency circuit, reduce energy loss during transmission, and thus extend the communication distance and reduce the bit error rate.

[0029] The feed point 70 adopts a rectangular structure. Compared with the traditional circular or narrow strip feed point, the feed point 70 has a larger contact area with the radiating unit 80. The larger contact area can improve the mechanical connection reliability between the feed point 70 and the external circuit, and the crimping is more secure. It reduces the problem of feed point falling off or loosening due to vibration, impact or bending, avoids signal transmission interruption or performance degradation caused by connection failure, thereby improving the effective radiation power, extending the communication distance and reducing the bit error rate.

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

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

[0032] The first radiating section 130 includes 17 sequentially connected and adjacent perpendicular radiating elements, which are folded in shape. This folding design significantly increases the effective electrical length of the radiating elements within a limited space, enabling them to meet the electrical length requirements of a wide frequency band of 433MHz-915MHz. The low-frequency band of 433MHz corresponds to approximately 1 / 4 wavelength, and the high-frequency band of 915MHz corresponds to approximately 1 / 8 wavelength, covering the entire operating bandwidth of the FPC antenna. This avoids impedance mismatch caused by frequency shift at a single resonant point, thereby reducing energy transmission loss, increasing effective radiated power, extending communication distance, and reducing bit error rate.

[0033] The vertical connection between adjacent radiating elements in an FPC antenna alters the current flow path, causing the current to distribute in a serpentine pattern rather than a straight line within the radiating element. This effectively suppresses current concentration on the surface of the radiating element, reducing ohmic losses in the high-frequency band. The vertically connected element structure allows the components of the current in different directions to cancel each other out, reducing energy leakage to non-primary radiation directions, further improving energy radiation efficiency, thereby increasing effective radiated power, extending communication distance, and reducing bit error rate.

[0034] Seventeen adjacent vertical radiating elements support each other at connection points, forming a rigid, grid-like structure. When the FPC antenna is subjected to vibration, impact, or bending, the vertically connected radiating elements can disperse external stress through mutually constrained mechanical transmission. The bending moment at a point subjected to impact is offset by the reverse stress of adjacent radiating elements, reducing local deformation such as wrinkles or twists. This maintains the geometric stability of the overall FPC antenna structure, ensuring that the overall structure retains its designed shape and avoiding impedance mismatch or radiation direction shift caused by positional displacement, which would lead to a decrease in antenna performance.

[0035] The folded structure of the radiating elements in the first radiating section 130 results in a more uniform mass distribution, with the center of gravity located near the geometric center of the first radiating section 130. In vibration or impact scenarios, the uniform mass distribution of the first radiating section 130 reduces structural torsion or displacement caused by center of gravity shift. When the FPC antenna is subjected to horizontal vibration, the folded radiating elements can balance inertial forces through a symmetrical element layout, preventing overall displacement due to excessive mass on one side. This maintains relative positional stability with the mounting carrier and avoids impedance changes or radiation direction shifts caused by positional displacement, thus preventing antenna performance degradation.

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

[0037] The second radiating section 140 comprises 17 sequentially connected and adjacent perpendicular radiating elements, arranged in a folded shape. This folding design significantly increases the effective electrical length of the radiating elements within a limited space, enabling them to meet the electrical length requirements of a wide frequency band of 433MHz-915MHz. The low-frequency band of 433MHz corresponds to approximately 1 / 4 wavelength, and the high-frequency band of 915MHz corresponds to approximately 1 / 8 wavelength, covering the entire operating bandwidth of the FPC antenna. This avoids impedance mismatch caused by frequency shift at a single resonant point, thereby reducing energy transmission loss, increasing effective radiated power, extending communication distance, and reducing the bit error rate.

[0038] The vertical connection between adjacent radiating elements in an FPC antenna alters the current flow path, causing the current to distribute in a serpentine pattern rather than a straight line within the radiating element. This effectively suppresses current concentration on the surface of the radiating element, reducing ohmic losses in the high-frequency band. The vertically connected radiating element structure causes the components of the current in different directions to cancel each other out, reducing energy leakage to non-primary radiation directions, further improving energy radiation efficiency, thereby increasing effective radiated power, extending communication distance, and reducing bit error rate.

[0039] Seventeen adjacent vertical radiating elements support each other at connection points, forming a rigid, grid-like structure. When the FPC antenna is subjected to vibration, impact, or bending, the vertically connected radiating elements can disperse external stress through mutually constrained mechanical transmission. The bending moment at a point subjected to impact is offset by the reverse stress of adjacent radiating elements, reducing local deformation such as wrinkles or twists. This maintains the geometric stability of the overall FPC antenna structure, ensuring that the overall structure retains its designed shape and avoiding impedance mismatch or radiation direction shift caused by positional displacement, which would lead to a decrease in antenna performance.

[0040] The folded structure of the radiating elements in the second radiating section 140 results in a more uniform mass distribution, with the center of gravity located near the geometric center of the second radiating section 140. In vibration or impact scenarios, the uniform mass distribution of the second radiating section 140 reduces structural torsion or displacement caused by center of gravity shift. When the antenna is subjected to horizontal vibration, the folded radiating elements can balance inertial forces through a symmetrical element layout, preventing overall displacement due to excessive mass on one side. This maintains relative positional stability with the mounting carrier and avoids impedance changes or radiation direction shifts caused by positional displacement, thus preventing antenna performance degradation.

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

[0042] The third radiating section 150 comprises 17 sequentially connected and adjacent perpendicular radiating elements, arranged in a folded shape. This folding design significantly increases the effective electrical length of the radiating elements within a limited space, enabling them to meet the electrical length requirements of a wide frequency band of 433MHz-915MHz. The low-frequency band of 433MHz corresponds to approximately 1 / 4 wavelength, and the high-frequency band of 915MHz corresponds to approximately 1 / 8 wavelength, covering the entire operating bandwidth of the FPC antenna. This avoids impedance mismatch caused by frequency shift at a single resonant point, thereby reducing energy transmission loss of the FPC antenna, increasing effective radiated power, extending communication distance, and reducing the bit error rate.

[0043] The vertical connection between adjacent radiating elements in an FPC antenna alters the current flow path, causing the current to distribute in a serpentine pattern rather than a straight line within the radiating element. This design effectively suppresses current concentration on the surface of the radiating element, reducing ohmic losses at high frequencies. The vertically connected radiating element structure causes the components of the current in different directions to cancel each other out, reducing energy leakage to non-primary radiation directions, further improving energy radiation efficiency, thereby increasing effective radiated power, extending communication distance, and reducing bit error rate.

[0044] Seventeen adjacent vertical radiating elements support each other through connection points, forming a rigid, grid-like structure. When the FPC antenna is subjected to vibration, impact, or bending, the vertically connected radiating elements can disperse external stress through mutually constrained mechanical transmission. The bending moment at a point on the FPC antenna due to impact is offset by the reverse stress of adjacent radiating elements, reducing local deformation such as wrinkles or twists. This maintains the geometric stability of the overall FPC antenna structure, ensuring that the overall structure retains its designed shape and avoiding impedance mismatch or radiation direction shift caused by positional displacement, which would lead to a decrease in antenna performance.

[0045] The folded structure of the radiating elements in the third radiating section 150 results in a more uniform mass distribution, with the center of gravity located near the geometric center of the third radiating section 150. In vibration or impact scenarios, the uniform mass distribution of the third radiating section 150 reduces structural torsion or displacement caused by center of gravity shift. When the FPC antenna is subjected to horizontal vibration, the folded radiating elements can balance inertial forces through a symmetrical element layout, preventing overall displacement due to excessive mass on one side. This maintains the relative positional stability of the FPC antenna and the mounting carrier, avoiding impedance changes or radiation direction shifts caused by positional displacement, which could lead to antenna performance degradation.

[0046] Combination Figure 3-4 and Figure 8 As shown, optionally, the fourth radiating section 160 includes a 52nd radiating unit 680, a 53rd radiating unit 690, a 54th radiating unit 700, a 55th radiating unit 710, a 56th radiating unit 720, a 57th radiating unit 730, a 58th radiating unit 740, a 59th radiating unit 750, a 60th radiating unit 760, a 61st radiating unit 770, a 62nd radiating unit 780, a 63rd radiating unit 790, a 64th radiating unit 800, a 65th radiating unit 810, a 66th radiating unit 820, a 67th radiating unit 830, and a 68th radiating unit 840 connected in sequence. The 52nd radiating unit 680 is connected to the lower part of the second feed point 120. Two adjacent radiating units of the fourth radiating section 160 are perpendicular to each other, and the radiating units of the fourth radiating section 160 are folded back.

[0047] The fourth radiating section 160 contains 17 sequentially connected and adjacent perpendicular radiating elements, which are folded in shape. This folding design significantly increases the effective electrical length of the radiating elements within a limited space, enabling them to meet the electrical length requirements of a wide frequency band of 433MHz-915MHz. The low-frequency band of 433MHz corresponds to approximately 1 / 4 wavelength, and the high-frequency band of 915MHz corresponds to approximately 1 / 8 wavelength, covering the entire operating bandwidth of the FPC antenna. This avoids impedance mismatch caused by frequency shift at a single resonant point, thereby reducing energy transmission loss, increasing effective radiated power, extending communication distance, and reducing bit error rate.

[0048] The vertical connection between adjacent radiating units alters the current flow path, causing the current to be distributed in a serpentine pattern rather than a straight line within the radiating unit. This design effectively suppresses current concentration on the copper foil surface, reducing ohmic losses at high frequencies. The vertically connected unit structure causes the components of the current in different directions to cancel each other out, reducing energy leakage to non-primary radiating directions, further improving energy radiation efficiency, thereby increasing effective radiated power, extending communication distance, and reducing bit error rate.

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

[0050] The folded structure of the radiating elements in the fourth radiating section 160 results 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 displacement caused by center of gravity shift. When the antenna is subjected to horizontal vibration, the folded radiating section can balance inertial forces through its symmetrical radiating element layout, preventing overall displacement due to excessive mass on one side. This maintains the relative positional stability of the FPC antenna and the mounting carrier, avoiding impedance changes or radiation direction shifts caused by FPC antenna positional shifts, thus preventing antenna performance degradation.

[0051] Combination Figure 2 and Figure 9-10 As shown, optionally, the positioning part 90 includes a first positioning part 850 and a second positioning part 860. The first positioning part 850 is disposed between the first radiating part 130 and the second radiating part 140. The first positioning part 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 part 850 is the same. The second positioning part 860 is disposed between the third radiation part 150 and the fourth radiation part 160. The second positioning part 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 part 860 is the same.

[0052] Traditional FPC antennas, with their single or few positioning points, may break or detach from their positioning points due to excessive local stress under strong vibration or impact, causing the FPC antenna to lose its constraint function. The first positioning part 850 and the second positioning part 860 contain five equidistant positioning points, forming a multi-point redundant constraint structure. Even if some positioning points experience slight failure due to external forces, the remaining positioning points can still maintain the relative positional stability between the four radiating parts through uniformly distributed constraint forces. This avoids overall structural displacement caused by the failure of some positioning points, and prevents impedance changes or radiation direction shifts caused by positional displacement, thus preventing a degradation in antenna performance.

[0053] The first positioning part 850, located between the first radiating part 130 and the second radiating part 140, includes five equidistant positioning points. The second positioning part 860, located between the third radiating part 150 and the fourth radiating part 160, also includes five equidistant positioning points. The equidistant positioning points, with equal spacing between adjacent points, form a uniform mechanical support network between the radiating parts. When the FPC antenna is subjected to vibration, impact, or multi-degree-of-freedom bending, external stress is uniformly transmitted to adjacent radiating elements through the positioning points, preventing stress concentration in a localized area. This uniform stress distribution effectively suppresses local deformation of the radiating elements, ensuring that the overall electrical length of the folded radiating part remains at the design value. The constraint of the equidistant positioning points prevents the total electrical length from shortening or lengthening due to deformation, thereby avoiding impedance mismatch caused by electrical length mismatch, reducing energy transmission loss, increasing effective radiated power, extending communication distance, and reducing the bit error rate.

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

[0055] This disclosure provides an integrated data acquisition and transmission device, including a wideband FPC antenna from the aforementioned embodiments.

[0056] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A broadband FPC antenna, characterized in that, include: A copper foil layer, the copper foil layer comprising a radiating unit portion; A black oil layer is disposed below the copper foil layer; AD adhesive layer, wherein the AD adhesive layer is disposed below the black oil layer; PI base layer, wherein the PI base layer is disposed below the AD adhesive layer; A 3M adhesive layer is disposed on the underside of the PI substrate; Release paper layer, the release paper layer being disposed below the 3M adhesive layer; A radiating unit section is disposed on the copper foil layer, including a first radiating section, a second radiating section, a third radiating section and a fourth radiating section; A radiation interval is provided between two adjacent radiation sections, including a first radiation interval, a second radiation interval, a third radiation interval, and a fourth radiation interval; A positioning part is disposed between the first radiating part and the second radiating part, and between the third radiating part and the fourth radiating part; The radiating unit is connected to the feed point.

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

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

4. A broadband FPC antenna according to claim 2, characterized in that, The first radiating section includes a first radiating unit, a second radiating unit, a third radiating unit, a fourth radiating unit, a fifth radiating unit, a sixth radiating unit, a seventh radiating unit, an eighth radiating unit, a ninth radiating unit, a tenth radiating unit, an eleventh radiating unit, a twelfth radiating unit, a thirteenth radiating unit, a fourteenth radiating unit, a fifteenth radiating unit, a sixteenth radiating unit, and a seventeenth radiating unit connected in sequence. The first radiating unit is connected to the upper part of the first feed point. Two adjacent radiating units of the first radiating section are perpendicular to each other. The radiating units of the first radiating section are folded back.

5. A broadband FPC antenna according to claim 2, characterized in that, The second radiating section includes the eighteenth, nineteenth, twentieth, twenty-first, twenty-second, twenty-third, twenty-fourth, twenty-fifth, twenty-sixth, twenty-seventh, twenty-eighth, twenty-ninth, thirtieth, thirty-first, thirty-second, thirty-third, and thirty-fourth radiating units connected in sequence. The eighteenth radiating unit is connected to the upper part of the second feed point. Two adjacent radiating units of the second radiating section are perpendicular to each other, and the radiating units of the second radiating section are folded back.

6. A broadband FPC antenna according to claim 2, characterized in that, The third radiating section includes a 35th radiating unit, a 36th radiating unit, a 37th radiating unit, a 38th radiating unit, a 39th radiating unit, a 40th radiating unit, a 41st radiating unit, a 42nd radiating unit, a 43rd radiating unit, a 44th radiating unit, a 45th radiating unit, a 46th radiating unit, a 47th radiating unit, a 48th radiating unit, a 49th radiating unit, a 50th radiating unit, and a 51st radiating unit connected in sequence. The 35th radiating unit is connected to the lower part of the first feed point. Two adjacent radiating units of the third radiating section are perpendicular to each other, and the radiating units of the third radiating section are folded back.

7. A broadband FPC antenna according to claim 2, characterized in that, The fourth radiating section includes a 52nd radiating unit, a 53rd radiating unit, a 54th radiating unit, a 55th radiating unit, a 56th radiating unit, a 57th radiating unit, a 58th radiating unit, a 59th radiating unit, a 60th radiating unit, a 61st radiating unit, a 62nd radiating unit, a 63rd radiating unit, a 64th radiating unit, a 65th radiating unit, a 66th radiating unit, a 67th radiating unit, and a 68th radiating unit connected in sequence. The 52nd radiating unit is connected to the lower part of the second feed point. The two adjacent radiating units of the fourth radiating section are perpendicular to each other, and the radiating units of the fourth radiating section are folded back.

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 disposed between the first radiating part and the second radiating 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 distance between two adjacent positioning points of the first positioning part is the same. The second positioning part is disposed between the third radiating part and the fourth radiating 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 distance between any two adjacent positioning points of the second positioning part is the same.

9. A broadband FPC antenna according to claim 1, characterized in that, The width of the radiating unit in the radiating unit section is 0.5 mm, and the material is single-sided electrolytic copper foil.

10. A data acquisition and transmission integrated machine, characterized in that, Includes a broadband FPC antenna as described in any one of claims 1 to 9.

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