Reconfigurable antenna and joint rotation detector based on flexible directional diagram

Abstract

The utility model discloses a reconfigurable antenna and joint rotation detector based on a flexible directional diagram, comprising an SMA joint and a polyimide substrate, and the SMA joint is installed on the polyimide substrate; the front surface of the polyimide substrate is provided with a front surface active oscillator, a microstrip line, a leading unit and a front surface plastic-coated binding wire, and the front surface active oscillator is connected with the microstrip line and the SMA connector; the guiding unit is located above the active oscillator, and the front surface plastic-coated binding wires are located on the two sides of the guiding unit. The back surface of the polyimide substrate is provided with a back surface active oscillator, a back surface plastic-coated binding wire and a back surface grounding plate. The back surface active oscillator is connected with the back surface grounding plate and the SMA connector. And the front surface plastic-coated binding wires and the back surface plastic-coated binding wires are arranged in a one-to-one correspondence manner. The device can be made into a flexible device, and has the advantages of paper type lightness and thinness, simple structure, convenience in operation and low cost.

Description

Technical Field

[0001] This utility model relates to a flexible pattern reconfigurable antenna and a joint rotation detector, belonging to the field of reconfigurable antenna technology. Background Technology

[0002] With the rapid development of wireless communication technologies such as the Internet of Things (IoT), Artificial Intelligence (AI), and mobile communications, the demand for multifunctional, miniaturized, and diversified technologies is constantly increasing. The 6GHz band can meet the frequency band requirements and high-speed, low-latency demands of the post-5G and 6G era. Pattern-reconfigurable antennas can change beam direction as needed, improving gain, avoiding interference, significantly improving communication efficiency, and requiring no additional space. Antenna reconfiguration is typically achieved using semiconductor devices (e.g., varactor diodes, PIN diodes) and microelectromechanical systems (MEMS). Semiconductor reconfigurable antennas offer fast response times and are easy to operate. However, semiconductor devices typically have short lifespans and high failure rates, cannot withstand high microwave power, and exhibit nonlinear effects, which can introduce distortion in the transmission path or reduce the noise ratio in the receiving path, especially at high frequencies. Furthermore, these semiconductor devices require additional bias circuitry, complicating the antenna structure and increasing cost. MEMS reconfigurable antennas can address some of these issues, but require high voltage, and the mechanical moving parts make them relatively large and difficult to integrate. Furthermore, most existing pattern-reconfigurable antennas typically exhibit discontinuous angle reconstruction and require numerous diodes, external bias circuitry, and complex feed networks, further increasing structural complexity and cost. While antenna-based sensors have been reported to some extent, their numbers are limited, and they are usually made of rigid materials that cannot be bent or deformed, restricting their applications. Moreover, they are structurally complex, bulky, and expensive. Utility Model Content

[0003] Purpose of the utility model: In order to overcome the shortcomings of the existing technology, this utility model provides a flexible pattern reconfigurable antenna and joint rotation detector. By utilizing the bendable properties of flexible materials, combined with pattern reconfigurable antennas and intelligent deformable memory materials, it can achieve multiple functions in different fields (Internet of Things (IoT), Artificial Intelligence (AI), mobile communication, sensing, etc.).

[0004] Technical solution: To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A flexible pattern reconfigurable antenna includes an SMA connector and a polyimide substrate. The SMA connector is mounted on the polyimide substrate. The front side of the polyimide substrate has a front active element, a microstrip line, a directing element, and front plastic-coated binding wires. The microstrip line is located on the bottom side of the polyimide substrate. The front active element is connected to both the microstrip line and the SMA connector. The directing element is located above the active element, and the front plastic-coated binding wires are located on both sides of the directing element. The back side of the polyimide substrate has a back active element, back plastic-coated binding wires, and a back ground plane. The back ground plane is located on the bottom side of the polyimide substrate. The back active element is connected to both the back ground plane and the SMA connector. The front and back plastic-coated binding wires are arranged opposite each other.

[0006] Preferably, the guiding unit includes a guide one, a guide two, and a guide three, which are radially spaced on the front side of the polyimide substrate.

[0007] Preferably, both the front active oscillator and the back active oscillator are L-shaped active oscillators composed of vertical and horizontal plates, and the vertical plates of the front active oscillator and the back active oscillator are arranged opposite to each other, and the pointing direction of the horizontal plates of the front active oscillator is opposite to that of the horizontal plates of the back active oscillator.

[0008] Preferably, the front active oscillator and the back active oscillator are copper foil patch active oscillators, the microstrip line is a copper foil patch microstrip line, and the guiding unit is a copper foil patch guiding unit.

[0009] Preferably, the front active oscillator and the back active oscillator are silver inkjet printed active oscillators, the microstrip line is a silver inkjet printed microstrip line, and the guiding unit is a silver inkjet printed guiding unit.

[0010] Preferably, the bend of the reconfigurable antenna is located 13-17 mm from the edge of the microstrip line feed.

[0011] Preferably, a deformable memory composite material layer is provided on the back side of the polyimide substrate.

[0012] Preferably, a temperature / photosensitive composite layer is provided on the back side of the polyimide substrate (4).

[0013] This utility model also provides an AI robot joint rotation non-contact human-computer interaction intelligent controller, including a robot joint and the aforementioned flexible pattern reconfigurable antenna. The flexible pattern reconfigurable antenna is disposed on the robot joint, and the director one, director two, and director three of the flexible pattern reconfigurable antenna are located on the curved surface of the robot joint, and the director one, director two, and director three are distributed at intervals along the axial direction of the curved surface of the robot joint.

[0014] This utility model also provides a joint rotation detector, including a patch antenna and a finger sleeve. The patch antenna is mounted on the finger sleeve. The patch antenna adopts the above-mentioned flexible pattern reconfigurable antenna. The director one, director two, and director three of the flexible pattern reconfigurable antenna are distributed at intervals along the axial direction of the finger sleeve.

[0015] Compared with the prior art, this utility model has the following advantages:

[0016] 1. The antenna's operating frequency covers a wide range of the 6GHz mid-frequency band, which can meet the frequency band requirements and high-speed, low-latency requirements of the post-5G and 6G era.

[0017] 2. The reconfigurable direction pattern can meet the needs of the rapid development of wireless communication technologies such as the Internet of Things (IoT), Artificial Intelligence (AI), and mobile communication for multi-functionality, miniaturization, and diversification, making its applications very flexible.

[0018] 3. This invention overcomes the shortcomings of commonly used semiconductor reconfigurable antennas, such as nonlinear distortion, lack of support for high-power operation, high noise, short lifespan, complex bias circuits and complex feeding networks. It also does not have the high driving voltage requirement of MEMS reconfigurable antennas, and has a simple structure, small size, low cost, high peak gain and high front-to-back ratio.

[0019] 4. This utility model can be made into a flexible device, suitable for wearable devices, and integrates the superior advantages of flexible and reconfigurable antennas.

[0020] 5. This utility model has multifunctional characteristics. By utilizing flexible materials and intelligent deformable memory materials, combined with the reconfigurable antenna structure, it achieves multiple multifunctional purposes in various fields (Internet of Things (IoT), Artificial Intelligence (AI), mobile communication, sensing, etc.). Attached Figure Description

[0021] Figure 1 Schematic diagram of a flexible pattern reconfigurable antenna structure.

[0022] Figure 2 AI robot joint rotation non-contact human-computer interaction intelligent controller.

[0023] Figure 3Medical testing equipment for rheumatism and other joint diseases or cervical spine disorders.

[0024] Figure 4 : Humidity or temperature, light sensor.

[0025] Figure 5 This is the S11 curve when the antenna is deployed.

[0026] Figure 6 : These are S11 curves for antenna bending radii of 4mm, 5mm, 6mm, 7mm, and 8mm.

[0027] Figure 7 : is the radiation pattern of the XOY plane when the flexible pattern reconfigurable antenna is not bent.

[0028] Figure 8 The radiation pattern of the YOZ plane of a flexible pattern reconfigurable antenna when it is not bent.

[0029] Figure 9 : The curve of the antenna's main direction angle as a function of the bending radius.

[0030] Figure 10 Gain curves corresponding to different radii of curvature.

[0031] Among them, 1—front active vibrator, 2—back active vibrator, 3—SMA connector, 4—polyimide substrate, 5—microstrip line, 6—director one, 7—director two, 8—director three, 9—front plastic-coated binding wire, 10—back plastic-coated binding wire, 11—grounding plate, 21—robot joint, 22—flexible pattern reconfigurable antenna, 23—robotic arm, 24—support layer, 25—deformable memory composite material layer, 31—patch antenna, 32—finger sleeve, 33—joint rotation detector. Detailed Implementation

[0032] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0033] Example 1

[0034] This embodiment provides a flexible pattern reconfigurable antenna, such as... Figure 1 As shown, it includes an SMA connector 3 and a polyimide substrate 4. In another embodiment, the polyimide substrate 4 has dimensions of 30 × 39 × 0.05 mm. 3The SMA connector 3 is mounted on the polyimide substrate 4. The front side of the polyimide substrate 4 is provided with a front active oscillator 1, a microstrip line 5, a guiding unit, and a front plastic-coated binding wire 9. The microstrip line 5 is located on the bottom side of the polyimide substrate 4. The front active oscillator 1 is connected to the microstrip line 5 and the SMA connector 3 respectively. The guiding unit is located above the active oscillator 1, and the front plastic-coated binding wire 9 is located on both sides of the guiding unit. The back side of the polyimide substrate 4 is provided with a back active oscillator 2, a back plastic-coated binding wire 10, and a back ground plane 11. The back ground plane 11 is located on the bottom side of the polyimide substrate 4. The back active oscillator 2 is connected to the back ground plane 11 and the SMA connector 3 respectively. The front plastic-coated binding wire 9 and the back plastic-coated binding wire 10 are arranged opposite each other, and both the front plastic-coated binding wire 9 and the back plastic-coated binding wire 10 are made of PVC-coated binding wire. By controlling the bending radius of the antenna using the front-side PVC-coated binding wire 9 and the back-side PVC-coated binding wire 10, the beam direction can be continuously changed within the range of 42°-90°-137° to achieve pattern reconfiguration. Since the PVC-coated binding wires are very thin, their impact on the antenna's radiation performance is negligible. In another embodiment, the bending position of the reconfigurable antenna is located 13-17mm from the feed edge of the microstrip line 5, i.e., bending occurs 15mm from the feed edge of the microstrip line, ensuring that the shape of the active element is not affected by the bending and guaranteeing the antenna's fundamental radiation performance.

[0035] By controlling the bending direction and bending radius, the following was achieved: when the flexible antenna bends forward, the radiation direction angle changes continuously from 90° to 42°; when it bends backward, the radiation direction angle changes continuously from 90° to 137°; the frequency remains constant at 5.8 GHz, and the gain decreases monotonically as the degree of bending increases (this characteristic can be applied to the multifunctional device of this invention).

[0036] The guiding unit has three guides, namely guide 6, guide 7, and guide 8, which are radially spaced on the front side of the polyimide substrate 4. In another embodiment, the guiding unit has four guides, and in yet another embodiment, the guiding unit has two guides.

[0037] In another embodiment, the front active oscillator 1 and the back active oscillator 2 are both L-shaped active oscillators composed of vertical and horizontal plates, and the vertical plates of the front active oscillator 1 and the back active oscillator 2 are arranged opposite to each other, and the pointing direction of the horizontal plates of the front active oscillator 1 is opposite to the pointing direction of the horizontal plates of the back active oscillator 2.

[0038] In another embodiment, the front active oscillator 1 and the back active oscillator 2 are copper foil patch active oscillators, the microstrip line 5 is a copper foil patch microstrip line, and the guiding unit is a copper foil patch guiding unit. In another embodiment, the front active oscillator 1 and the back active oscillator 2 are silver inkjet printed active oscillators, the microstrip line 5 is a silver inkjet printed microstrip line, and the guiding unit is a silver inkjet printed guiding unit.

[0039] In this embodiment, the frequency remains constant at 5.8 GHz throughout the bending and beam direction changing process. Figure 5 , 6 The orientation pattern when not bent is as follows: Figure 7 , 8 As shown. The main beam direction varies with the bending radius as follows: Figure 9 As shown. Figure 10 The gain decreases monotonically with increasing bending degree (this characteristic is applied in schemes two to four of this utility model). Table 1 shows the performance of the flexible antenna on the YOZ plane with different bending radii when bending upward from horizontal, where 90° is the horizontally flat state of the antenna.

[0040] Table 1 Antenna performance of the YOZ plane with different bending radii

[0041]

[0042] This embodiment achieves reconfigurable antenna pattern by bending it to different degrees. Its resonant frequency is 5.8 GHz, and the radiation direction can be continuously changed between 42°-90° or 90°-137°. It has the advantages of being thin and light like a paper sheet, simple in structure, easy to operate, and very low in cost.

[0043] Example 2

[0044] This embodiment provides a non-contact, human-computer interactive intelligent controller for the joint rotation of an AI robot, such as... Figure 2 As shown, the system includes a robot joint 21 and the aforementioned flexible pattern reconfigurable antenna 22. The flexible pattern reconfigurable antenna 22 is mounted on the robot joint 21, and its directors 6, 7, and 8 are located on the curved surface of the robot joint 21, with the directors spaced axially along the curved surface of the robot joint 21. In this embodiment, the flexible pattern reconfigurable antenna is scaled down proportionally and worn on joints such as fingers and wrists. By bending the joint, the antenna's pattern and gain are changed, and the AI ​​robot receives the signal and performs the same action, achieving non-contact human-machine interactive control of the AI ​​robot's joint rotation.

[0045] Example 3

[0046] This embodiment provides a joint rotation detector, which can be used as a medical detection device for rheumatism and other joint diseases or cervical spine disorders, such as... Figure 3 As shown, the device includes a patch antenna 31 and a finger sleeve 32. The patch antenna 31 is mounted on the finger sleeve 32. The patch antenna 31 employs the aforementioned flexible pattern reconfigurable antenna. The director 6, director 7, and director 8 of the flexible pattern reconfigurable antenna 22 are spaced apart along the axial direction of the finger sleeve 32. After scaling down the size of the aforementioned flexible pattern reconfigurable antenna according to this embodiment, it is worn at the patient's joint or attached to the neck. By measuring the antenna's pattern and its gain changes, the flexibility of the patient's joint or cervical spine can be detected.

[0047] Example 4

[0048] This embodiment provides a humidity or temperature, light sensor, such as... Figure 4 A deformable memory composite material layer is provided on the back side of the polyimide substrate 4. Specifically, a humidity-sensitive smart deformable memory composite material (such as cellulose, hydrogel, etc.) is pasted onto the back side of the polyimide substrate 4, 15mm away from the edge of the microstrip line feed. When the humidity is high, it absorbs water and bends; when it is dry, it does not bend or straightens and recovers. This characteristic is used to detect whether the humidity exceeds the standard. In another embodiment, a temperature / light sensor is provided. A temperature / light-sensitive composite layer is provided on the back side of the polyimide substrate (4). Specifically, a temperature / light-sensitive composite material (such as cellulose, liquid crystal, etc.) that bends with temperature or light exposure is pasted onto the back side of the polyimide substrate 4, thereby fabricating a temperature / light sensor.

[0049] In summary, this invention combines flexible materials with reconfigurable antennas to form a flexible reconfigurable antenna, which can meet diverse needs in fields such as the Internet of Things (IoT), Artificial Intelligence (AI), mobile communication, and sensing, such as soft robots and flexible sensors. The multifunctional device based on the flexible pattern reconfigurable antenna possesses advantages such as flexibility, deformability, good fit with the carrier, ease of installation, space saving, and reduced system size. It also offers the advantages of multifunctionality, efficiency enhancement, and cost savings without additional space occupation, making it widely applicable and flexibly adjustable.

[0050] This utility model is based on the flexible pattern reconfigurable antenna structure. It utilizes the bendable properties of flexible materials and intelligent deformable memory materials to achieve multiple multifunctional purposes in different fields (Internet of Things (IoT), Artificial Intelligence (AI), mobile communication, sensing, etc.): such as flexible pattern reconfigurable antenna, AI joint sensor, joint medical detector, humidity sensor, temperature sensor, light sensor, etc.

[0051] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A flexible pattern reconfigurable antenna, characterized in that, The system includes an SMA connector (3) and a polyimide substrate (4). The SMA connector (3) is mounted on the polyimide substrate (4). The front side of the polyimide substrate (4) is provided with a front active oscillator (1), a microstrip line (5), a guiding unit, and a front plastic-coated binding wire (9). The microstrip line (5) is located on the bottom side of the polyimide substrate (4). The front active oscillator (1) is connected to the microstrip line (5) and the SMA connector (3) respectively. The guiding unit is located on the active oscillator (1). Above, and the front plastic-coated tie wire (9) is located on both sides of the guiding unit; the back side of the polyimide substrate (4) is provided with a back active oscillator (2), a back plastic-coated tie wire (10), and a back ground plane (11). The back ground plane (11) is located on the bottom side of the polyimide substrate (4). The back active oscillator (2) is connected to the back ground plane (11) and the SMA connector (3) respectively; the front plastic-coated tie wire (9) and the back plastic-coated tie wire (10) are arranged opposite to each other.

2. The flexible pattern reconfigurable antenna according to claim 1, characterized in that: The guiding unit includes a first guide (6), a second guide (7), and a third guide (8), which are arranged radially at intervals on the front side of the polyimide substrate (4).

3. The flexible pattern reconfigurable antenna according to claim 2, characterized in that: The front active oscillator (1) and the back active oscillator (2) are both L-shaped active oscillators composed of vertical and horizontal plates. The vertical plates of the front active oscillator (1) and the back active oscillator (2) are arranged opposite to each other. The direction of the horizontal plate of the front active oscillator (1) is opposite to the direction of the horizontal plate of the back active oscillator (2).

4. The flexible pattern reconfigurable antenna according to claim 3, characterized in that: The front active oscillator (1) and the back active oscillator (2) are copper foil patch active oscillators, the microstrip line (5) is a copper foil patch microstrip line, and the guiding unit is a copper foil patch guiding unit.

5. The flexible pattern reconfigurable antenna according to claim 4, characterized in that: The front active oscillator (1) and the back active oscillator (2) are silver inkjet printed active oscillators, the microstrip line (5) is a silver inkjet printed microstrip line, and the guiding unit is a silver inkjet printed guiding unit.

6. The flexible pattern reconfigurable antenna according to claim 5, characterized in that: The reconfigurable antenna is bent at the edge of the microstrip line (5) feed, 13-17 mm away.

7. The flexible pattern reconfigurable antenna according to claim 6, characterized in that: A deformable memory composite material layer is provided on the back side of the polyimide substrate (4).

8. The flexible pattern reconfigurable antenna according to claim 6, characterized in that: A temperature / photosensitive composite layer is provided on the back side of the polyimide substrate (4).

9. A joint rotation detector, characterized in that: Includes a patch antenna (31) and a finger sleeve (32), wherein the patch antenna (31) is mounted on the finger sleeve (32), and the patch antenna (31) adopts the flexible pattern reconfigurable antenna according to claim 1, wherein the director one (6), director two (7), and director three (8) of the flexible pattern reconfigurable antenna (22) are distributed at intervals along the axial direction of the finger sleeve (32).

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