Coupling chip biological frequency modulation module
By using FPC technology and a coupled antenna design with a double-layer coil structure, the problems of low transmission efficiency and insufficient applicability are solved, achieving high-efficiency transmission and long-distance reading, which is suitable for complex curved surface environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 黑龙江芯健生物科技有限责任公司
- Filing Date
- 2025-06-13
- Publication Date
- 2026-04-21
AI Technical Summary
Existing coupled antenna chip modules have low transmission efficiency, short read distance, and are not suitable for complex curved surface environments.
The coupled antenna, fabricated using FPC technology, includes a coupling line unit with multiple square bends and a matching loop unit with a double-layer coil structure. Impedance conjugate matching is achieved through coupling gaps. Combined with an UHF RFID chip and flip-chip packaging technology, reliability and applicability are improved.
It improves transmission efficiency, expands the scope of application, achieves high-density electrical connections and miniaturization, and maximizes reading distance.
Smart Images
Figure CN224153580U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of radio frequency chip technology, and more specifically to a coupling chip bio-frequency modulation module. Background Technology
[0002] Currently, commercially available coupled antenna chip modules often suffer from low transmission efficiency and short readout distance. Furthermore, existing antennas are primarily manufactured using aluminum etching or PCB processes. Aluminum-etched antennas have relatively low reliability, and PCB-processed antennas cannot be used on curved surfaces. Antennas made using either of these processes are unsuitable for complex and curved environments. Utility Model Content
[0003] In order to overcome the above-mentioned shortcomings of the prior art, this utility model provides a coupling chip biological frequency modulation module, which can improve transmission efficiency.
[0004] The technical solution adopted by this utility model to solve its technical problem is: a coupling chip bio-frequency modulation module, including a chip and a coupling antenna. The coupling antenna includes a coupling line unit and a matching ring unit that are separated from each other. The matching ring unit is connected to the chip. The coupling line unit is a bent line structure with multiple square bends. The matching ring unit is a double-layer coil structure. The matching ring unit is located in the square bend in the middle of the coupling line unit. A coupling gap is provided between the outer coil of the double-layer coil structure of the matching ring unit and the bend of the coupling line unit.
[0005] In a preferred technical solution, the coupling antenna is fabricated using FPC technology, which offers high reliability and is better suited for installation on complex curved surfaces, thus helping to expand the applicability of the coupling chip bio-frequency modulation module.
[0006] In a preferred technical solution, the chip is connected to the matching ring unit through a flip-chip packaging process, which enhances reliability, enables high-density electrical connections, and helps reduce the size of the chip module.
[0007] In a preferred technical solution, the chip is an ultra-high frequency RFID chip.
[0008] In a preferred embodiment, the bending angle of the square bend is a rounded angle, which increases its strength and durability.
[0009] In a preferred embodiment, the double-layer coil structure of the matching ring unit includes two interconnected layers of square coils, with the bending angle of the square coils being an arc angle, which provides better strength and durability.
[0010] In a preferred embodiment, the coupling line unit includes six downward-facing square bends and five upward-facing square bends, with the downward-facing and upward-facing square bends arranged alternately and connected end to end.
[0011] In a preferred embodiment, the width of the square bend is 7.5mm to 8.5mm and the depth is 7.5mm to 8.5mm, and the width and depth of the square bend are the same.
[0012] In a preferred embodiment, the size of the matching ring unit is 7.4mm*7.4mm, and the size of the chip is 8mm*8mm.
[0013] In a preferred embodiment, the width of the coupling gap is 0.1 mm to 1.1 mm.
[0014] As can be seen from the above technical solution, compared with the prior art, the beneficial effects of this utility model are: a coupling chip bio-frequency modulation module, through the bent line structure of the coupling line unit and the setting of the coupling distance, can make the impedance of the coupling line unit consistent with the real part of the chip. The matching ring unit adopts a double-layer coil structure with a certain inductance, and its complex impedance can be conjugate with the imaginary part of the chip, thereby enabling the antenna impedance of the coupling chip bio-frequency modulation module to be conjugate matched with the chip impedance, thereby maximizing the transmission efficiency and achieving the optimal read distance; at the same time, the double-layer coil structure of the matching ring unit can effectively reduce the area of the matching ring unit, which helps to miniaturize it in actual use.
[0015] In addition, other advantages of this invention will be set forth in the description which follows, in part will be obvious from the description, or may be learned by practice of this invention. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the structure of the coupling chip bio-frequency modulation module of this utility model;
[0018] Figure 2 This is a schematic diagram of the matching ring unit of this utility model;
[0019] Explanation of reference numerals in the attached diagram: 1. Chip; 2. Coupled antenna; 20. Coupled gap; 21. Coupled line unit; 22. Matching ring unit. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0021] In the description of this utility model, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0022] Reference Figure 1-2 This invention describes a coupling chip bio-frequency modulation module according to an embodiment of the present invention.
[0023] In one embodiment, such as Figure 1-2 As shown, a coupling chip bio-frequency modulation module is a coupling antenna chip module, including a chip 1 and a coupling antenna 2. The coupling antenna 2 includes a coupling line unit 21 and a matching ring unit 22 that are separated from each other. The matching ring unit 22 is connected to the chip 1.
[0024] The coupling line unit 21 is a bent line structure with multiple square bends, and the matching ring unit 22 is a double-layer coil structure. The matching ring unit 22 is located in the square bend in the middle of the coupling line unit 21. A coupling gap 20 is provided between the outer coil of the double-layer coil structure of the matching ring unit 22 and the bent line of the coupling line unit 21.
[0025] The coupling chip bio-frequency modulation module is mainly composed of chip 1 and coupling antenna 2. The coupling antenna 2 includes coupling line unit 21 and matching ring unit 22. Each coupling line unit 21 corresponds to a matching ring unit 22. The coupling line unit 21 adopts a bent line structure. The matching ring unit 22 is located in the square bent part in the middle of the coupling line unit 21 and has a specific coupling distance with the bent line to form a coupling gap 20.
[0026] The above embodiment provides a coupling chip bio-frequency modulation module. Through the bent line structure of the coupling line unit 21 and the setting of the coupling distance, the impedance of the coupling line unit 21 can be adjusted to be consistent with the real part of the chip 1. The matching ring unit 22 adopts a double-layer coil structure and has a certain inductance. Its complex impedance can be conjugate with the imaginary part of the chip 1, thereby enabling the antenna impedance of the coupling chip bio-frequency modulation module to be conjugate matched with the chip impedance, thereby maximizing the transmission efficiency and achieving the optimal reading distance.
[0027] Meanwhile, the double-layer coil structure of the matching ring unit 22 can effectively reduce the area of the matching ring unit 22, which helps to miniaturize it in actual use.
[0028] In this embodiment, the coupling antenna 2 is manufactured using FPC technology, which offers high reliability and is better suited to the installation requirements of complex curved surfaces, thus helping to expand the applicability of the coupling chip bio-frequency modulation module.
[0029] In this embodiment, the coupling antenna 2 of the coupling chip bio-frequency modulation module is manufactured using FPC (Flexible Printed Circuit) technology. This technology offers high reliability and applicability to curved surfaces, allowing for perfect application in complex curved surface conditions. It can be installed on non-metallic material surfaces with a certain curvature or inside equipment. FPC technology is a process for manufacturing printed circuit boards using polyimide or polyester film as the substrate. Printed circuit boards produced using this process exhibit high reliability and excellent flexibility, featuring high wiring density, light weight, thinness, and good bendability.
[0030] In this embodiment, chip 1 is connected to the matching ring unit 22 through flip packaging technology, which enhances reliability, enables high-density electrical connections, and helps reduce the size of the chip module.
[0031] In this embodiment, chip 1 is an ultra-high frequency RFID chip.
[0032] Among them, UHF RFID chips have a wide operating frequency range, from 860 to 960 MHz, and are characterized by long-distance communication and high-speed data transmission. They are widely used in communication, sensing and positioning fields.
[0033] In this embodiment, the bending angle of the square bend is a rounded angle, which can increase its strength and durability.
[0034] In this embodiment, the double-layer coil structure of the matching ring unit 22 includes two interconnected square coils. The bending angle of the square coils is an arc angle, which has better strength and durability.
[0035] In this embodiment, the coupling line unit 21 includes six downward-facing square bends and five upward-facing square bends. The downward-facing and upward-facing square bends are arranged alternately and connected end-to-end. Each square bend has the same size, and adjacent square bends share the same side.
[0036] In this embodiment, the width of the square bend is 7.5mm to 8.5mm and the depth is 7.5mm to 8.5mm, and the width and depth of the square bend are the same.
[0037] In this embodiment, the size of the matching ring unit 22 is 7.4mm*7.4mm, and the size of the chip 1 is 8mm*8mm.
[0038] In this embodiment, the width of the coupling gap 20 is 0.1mm to 1.1mm.
[0039] The working principle of the coupling chip bio-frequency modulation module in the above embodiments is as follows:
[0040] The coupled chip bio-frequency modulation module can form a complete transceiver sensing system with the reader / writer.
[0041] When the coupling chip bio-frequency modulation module enters the working area of the reader, the coupling antenna 2 of the coupling chip bio-frequency modulation module will receive the radio frequency signal emitted by the reader. The frequency range of the radio frequency signal is 300MHz to 3GHz, and the frequency band suitable for UHF RFID chips is generally 860 to 960MHz.
[0042] The aforementioned radio frequency signal provides power to chip 1 of the coupling chip bio-frequency modulation module, enabling it to work. On the other hand, chip 1 modulates the radio frequency signal emitted by the reader, loads the data stored in chip 1 onto the reflected wave, generates a modulated signal, and transmits it to the reader through coupling antenna 2.
[0043] After receiving the modulated signal reflected back from the bio-frequency modulation module of the coupling chip, the reader performs demodulation and decoding operations through the signal processing circuit inside the reader to extract the data sent by chip 1, and then transmits it to the back-end computer equipment for further processing.
[0044] During the above process, the signal is transmitted between chip 1 and coupled antenna 2. When the chip impedance Zc and the antenna impedance Za satisfy the conjugate matching condition, the power transmission efficiency from the antenna to chip 1 reaches its maximum and the reading distance is the longest.
[0045] Where Zc = Rc + jXc, Za = Ra + jXa, Rc is the resistance of chip 1, which is the real part of Zc, Xc is the reactance of chip 1, jXc is the imaginary part of Zc, Ra is the antenna resistance, which is the real part of Za, Xa is the antenna reactance, and jXa is the imaginary part of Za.
[0046] When Rc = Ra and Xc = -Xa, the chip impedance Zc and the antenna impedance Za satisfy the conjugate matching condition.
[0047] In the coupled antenna 2, both the coupling line unit 21 and the matching ring unit 22 are part of the coupled antenna 2. The coupling line unit 21 and the matching ring unit 22 are the largest factors affecting the real part Ra and the imaginary part jXa of the antenna impedance Za, respectively. The coupled chip bio-frequency modulation module provided in this embodiment, by setting the coupling line unit 21 and the matching ring unit 22, enables the antenna impedance of the coupled chip bio-frequency modulation module to be conjugate matched with the chip impedance, thereby maximizing transmission efficiency and extending the read distance.
[0048] Other components and operations of the coupling chip bio-frequency modulation module according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.
[0049] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0050] In the description of this specification, references to the terms "embodiment," "specific embodiment," "example," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example that is included in at least one embodiment or example of the present invention.
[0051] In this specification, the illustrative expressions of the terms used do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described may be combined with each other in any suitable manner in one or more embodiments or examples without interference or contradiction.
Claims
1. A coupled chip-based biological frequency modulation module, characterized in that: The device includes a chip and a coupling antenna, wherein the coupling antenna includes mutually separated coupling line units and matching loop units, and the matching loop units are connected to the chip; The coupling line unit is a bent line structure with multiple square bends, and the matching ring unit is a double-layer coil structure. The matching ring unit is located in the square bend in the middle of the coupling line unit, and a coupling gap is provided between the outer coil of the double-layer coil structure of the matching ring unit and the bent line of the coupling line unit.
2. The coupled-chip bio-frequency modulation module of claim 1, wherein: The coupling antenna is fabricated using FPC technology.
3. The coupled-chip bio-frequency modulation module of claim 2, wherein: The chip is connected to the matching ring unit via a flip-chip packaging process.
4. The coupled-chip bio-frequency modulation module of claim 2, wherein: The chip is an ultra-high frequency RFID chip.
5. The coupled-chip bio-frequency modulation module of claim 2, wherein: The bending angle of the square bend is a rounded angle.
6. The coupling chip bio-frequency modulation module according to any one of claims 2 to 5, characterized in that: The matching ring unit has a double-layer coil structure comprising two interconnected layers of square coils, wherein the bending angle of the square coils is an arc angle.
7. The coupled-chip bio-frequency modulation module of claim 6, wherein: The coupling line unit includes six downward-facing square bends and five upward-facing square bends, with the downward-facing and upward-facing square bends arranged alternately and connected end to end.
8. The coupled-chip bio-frequency modulation module of claim 1, wherein: The width of the square bend is 7.5mm to 8.5mm and the depth is 7.5mm to 8.5mm, and the width and depth of the square bend are the same.
9. The coupled-chip bio-frequency modulation module of claim 1, wherein: The size of the matching ring unit is 7.4mm*7.4mm, and the size of the chip is 8mm*8mm.
10. The coupled-chip bio-frequency modulation module of claim 1, wherein: The width of the coupling gap is 0.1mm to 1.1mm.