High-gain antenna microwave module and lamp

Abstract

The utility model relates to the technical field of antenna devices, and discloses a high-gain antenna microwave module which can eliminate induction blind areas and is large in installation height range, and the high-gain antenna microwave module comprises a microwave induction circuit board and an antenna which comprises a first sub-antenna and a second sub-antenna which are arranged at intervals and fixed on the microwave induction circuit board. The first sub-antenna is bent along a first direction close to the second sub-antenna to form a first end electrically connected with the microwave induction circuit board and a second end suspended above the microwave induction circuit board; the second sub-antenna is bent along a second direction parallel and opposite to the first direction to form a third end electrically connected with the microwave induction circuit board and a fourth end suspended above the microwave induction circuit board, and an included angle between a connecting line of the first end and the third end and the first direction is greater than 0 degree; and the second end and the fourth end jointly form a signal transceiving part of the antenna. The utility model further discloses a lamp comprising the high-gain antenna microwave module.

Description

Technical Field

[0001] The utility model relates to the technical field of antenna devices, in particular to a high-gain antenna microwave module and a lamp. Background Art

[0002] Microwave sensors are devices that use the characteristics of microwaves to detect certain physical quantities. They specifically emit microwaves through a transmitting antenna. When the microwaves encounter the object being measured during transmission, they will be absorbed or reflected, causing the power to change. In this way, the receiving antenna receives the microwaves that have passed through the object being measured or reflected by the object being measured, and converts them into electrical signals. The electrical signals are then processed by the measuring circuit to achieve microwave detection of the object being measured. Microwave sensors are mainly composed of microwave oscillators and microwave antennas. Currently, microwave sensors on the market mainly use two types of antennas: rod (columnar) antennas and board-mounted antennas. Among them, the rod antenna is a rod-shaped radiating conductor welded on a substrate (the substrate has a metal reflective surface). The rod antenna is a monopole antenna, combined with a Figure 1 and Figure 2 It can be seen that the maximum gain of the rod antenna is less than 1.8dBi, and the axial gain (θ=0°) is the lowest. In other words, the rod antenna has the characteristics of low gain and a blind spot in the axial direction of the antenna (a blind spot exists directly below the rod antenna). Therefore, this type of antenna microwave module can generally only be used in lamps with a hanging height of less than 3m in actual applications (the side view of the sensing range is shown in the figure). Figure 3 As shown in the figure, in order to avoid the problem of insufficient detection accuracy of the object under test caused by the large sensing blind area under the lamp, the range of optional installation heights of lamps equipped with microwave sensors is small, which in turn affects consumers' planning of lamp installation locations. Utility Model Content

[0003] Based on this, it is necessary to provide a high-gain antenna microwave module and lamp that can eliminate the sensing blind area and have a larger installation height range to address the above-mentioned shortcomings.

[0004] A high-gain antenna microwave module comprises a microwave sensing circuit board and an antenna electrically connected to the microwave sensing circuit board, the antenna comprising a first sub-antenna and a second sub-antenna spaced apart and fixed on the microwave sensing circuit board, the first sub-antenna being bent along a first direction approaching the second sub-antenna to form a first end electrically connected to the microwave sensing circuit board and a second end suspended above the microwave sensing circuit board, the second sub-antenna being bent along a second direction parallel to and opposite to the first direction to form a third end electrically connected to the microwave sensing circuit board and a fourth end suspended above the microwave sensing circuit board, the angle between a line connecting the first end and the third end and the first direction being greater than 0°, and the second end and the fourth end jointly forming a signal transceiver portion of the antenna.

[0005] In one embodiment, the length of the first sub-antenna is 28-32 mm, and the length of the second sub-antenna is 28-32 mm.

[0006] In one embodiment, the diameter of the first sub-antenna is 0.4-0.7 mm, and the diameter of the second sub-antenna is 0.4-0.7 mm.

[0007] In one embodiment, the distance between the first end and the third end along the width direction of the microwave sensor circuit board is 0.3-0.6 mm, and the distance between the first end and the third end along the length direction of the microwave sensor circuit board is 1.6-2 mm.

[0008] In one embodiment, the distance between the second end and the fourth end along the length direction of the microwave induction circuit board is 20-25 mm.

[0009] In one embodiment, the distance from the highest point on the first sub-antenna to the upper surface of the microwave sensor circuit board is 14-18 mm, and the distance from the highest point on the second sub-antenna to the upper surface of the microwave sensor circuit board is 14-18 mm.

[0010] In one embodiment, the bending portion of the first sub-antenna is an acute-angle structure, and the bending portion of the second sub-antenna is an acute-angle structure.

[0011] In one embodiment, the bending portion of the first sub-antenna is an arc-shaped structure, and the bending portion of the second sub-antenna is an arc-shaped structure.

[0012] In one embodiment, the microwave sensor circuit board includes a substrate and a main control circuit, a high-frequency microwave circuit, a voltage stabilizing circuit, a voltage comparison circuit, and a power supply voltage divider circuit arranged on the substrate, the first sub-antenna and the second sub-antenna are both electrically connected to the high-frequency microwave circuit, the high-frequency microwave circuit and the power supply voltage divider circuit are respectively electrically connected to the voltage comparison circuit, the voltage comparison circuit is electrically connected to the main control circuit, the voltage stabilizing circuit is respectively electrically connected to the main control circuit and an external controlled device, and the power supply voltage divider circuit is electrically connected to an external power supply.

[0013] The utility model also discloses a lamp, comprising a lamp body and a switch electrically connected to the lamp body. The lamp also comprises the above-mentioned high-gain antenna microwave module, and the microwave induction circuit board of the high-gain antenna microwave module is electrically connected to the switch to control the on and off of the switch.

[0014] The high-gain antenna microwave module and lamp of the utility model are implemented to increase the antenna gain by bending the antenna. After the high-frequency signal generated by the microwave sensing circuit board is transmitted through the first sub-antenna and the second sub-antenna, the sensing area formed directly below the high-gain antenna microwave module is increased, thereby solving the problem of axial coverage blind spots of the monopole rod antenna. The maximum hanging height of the high-gain antenna microwave module can reach 6-7m, and by designing the antenna as a dipole formed by the first sub-antenna and the second sub-antenna, the problem of narrowing the beam angle after the antenna is bent can be solved. While increasing the installation height range of the high-gain antenna microwave module and the lamp, the sensing distance around it does not change significantly, thereby ensuring the sensing effect and reliability of the high-gain antenna microwave module and the lamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the three-dimensional radiation pattern of the rod antenna;

[0016] Figure 2 is the two-dimensional radiation pattern of the rod antenna;

[0017] Figure 3 It is a side view of the sensing range of the rod antenna;

[0018] Figure 4 It is a front view of a high-gain antenna microwave module in one embodiment of the utility model;

[0019] Figure 5 A top view of a high-gain antenna microwave module in one embodiment of the utility model;

[0020] Figure 6 The three-dimensional radiation pattern of the monopole rod antenna after folding;

[0021] Figure 7 It is the two-dimensional radiation pattern of the folded monopole rod antenna;

[0022] Figure 8 A three-dimensional radiation pattern of a high-gain antenna microwave module in one embodiment of the utility model;

[0023] Fig. 9 A two-dimensional radiation pattern of a high-gain antenna microwave module in one embodiment of the utility model;

[0024] Fig.10 A side view of the sensing range of a high-gain antenna microwave module when it is suspended in one embodiment of the utility model;

[0025] Fig.11 A top view of the sensing range of a high-gain antenna microwave module when it is suspended in one embodiment of the utility model;

[0026] Fig.12 A circuit module diagram of a high-gain antenna microwave module in one embodiment of the utility model;

[0027] Fig.13 A circuit diagram of a main control circuit in one embodiment of the utility model;

[0028] Fig.14 A circuit diagram of a high-frequency microwave circuit in one embodiment of the utility model;

[0029] Fig.15 A circuit diagram of a voltage stabilizing circuit in one embodiment of the utility model;

[0030] Fig.16 A circuit diagram of a voltage comparison circuit in one embodiment of the utility model;

[0031] Fig.17 The figure is a circuit diagram of a power voltage divider circuit in one embodiment of the utility model. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0033] See also Figure 4 and Figure 5The utility model discloses a high-gain antenna microwave module that can eliminate the induction blind area and has a large installation height range. The high-gain antenna microwave module includes a microwave sensing circuit board 100 and an antenna electrically connected to the microwave sensing circuit board 100. The microwave sensing circuit board 100 generates a high-frequency signal after being powered on. The high-frequency signal is further radiated to the surroundings in the form of microwaves through the antenna, and a sensing area is formed. When a moving human body or object (measured object) enters the sensing area, the radiated microwaves are reflected back by the measured object, and the reflected microwaves will affect the circuit oscillation frequency of the microwave sensing circuit board 100, so as to judge the movement of the measured object in its sensing area by detecting the change of the oscillation frequency in the circuit. The antenna is used to transform the guided wave propagating on the transmission line into an electromagnetic wave propagating in an unbounded medium (usually free space), or to perform the opposite transformation. It is mainly used to transmit the high-frequency signal generated by the microwave sensing circuit board 100 to the environment in the form of electromagnetic waves, and then receive the electromagnetic waves reflected back in the environment and transmit them to the microwave sensing circuit board 100 in the form of electrical signals. That is to say, the antenna of this embodiment is used as a detection device (or signal transceiver) of a microwave sensor.

[0034] The antenna includes a first sub-antenna 200 and a second sub-antenna 300 which are arranged at intervals and fixed on the microwave sensor circuit board 100. The first sub-antenna 200 and the second sub-antenna 300 are actually radiating conductors of the antenna. The first sub-antenna 200 is bent along a first direction approaching the second sub-antenna 300 to form a first end 210 electrically connected to the microwave sensor circuit board 100 and a second end 220 suspended above the microwave sensor circuit board 100. The second sub-antenna 300 is bent along a second direction parallel to and opposite to the first direction to form a third end 310 electrically connected to the microwave sensor circuit board 100 and a fourth end 320 suspended above the microwave sensor circuit board 100. The angle between the connecting line of the first end 210 and the third end 310 and the first direction is greater than 0°. The second end 220 and the fourth end 320 jointly form a signal transceiver part of the antenna. It can also be understood that the first sub-antenna 200 is bent along a direction deviating from a line connecting the first end 210 and the third end 310 and close to the second sub-antenna 300, and the second sub-antenna 300 is bent along a direction opposite to the first direction and close to the first sub-antenna 200. In this way, the plane where the first sub-antenna 200 is located after bending is parallel to the plane where the second sub-antenna 300 is located, and the bending directions of the two are opposite and intersecting, so as to enhance the radiation intensity directly below the microwave sensing circuit board 100, thereby increasing the radiation height directly below the microwave sensing circuit board 100.

[0035] It should be noted that after the radiating conductor of the monopole rod antenna (i.e., the radiating conductor of a single rod antenna) is bent, the maximum gain of the bent monopole rod antenna is increased to 4dBi, and the axial (θ=0°) gain is the largest (e.g., Figure 6 and Figure 7 As shown). However, after the radiating conductor of the monopole rod antenna is bent, although the antenna gain is improved and the problem of blind coverage in the axial direction of the antenna is solved, the beam width of the antenna becomes narrower, resulting in a smaller coverage range of the antenna. In this case, the present application forms a dipole antenna by setting a crossed first sub-antenna 200 and a second sub-antenna 300, and bending the two toward each other. The second sub-antenna 300 serves as a dual radiating conductor of the first sub-antenna 200. After the two are coordinated, the gain of the antenna is slightly reduced, but the beam width is widened. On the premise of solving the problems of the original monopole rod antenna, the requirements of the actual application for coverage range are met to the greatest extent. Please combine Figure 4 as well as Figure 8-11 For the dipole antenna after bending (i.e., the antenna of this embodiment), although its antenna gain is slightly lower than that of the monopole antenna with a bent radiating conductor, its beam width is slightly higher than that of the monopole antenna with a simple bent radiating conductor, which ensures that the antenna has a larger radiation range. In addition, when the high-gain antenna microwave module is suspended, the microwave (electromagnetic wave) height of the bent portion of the first sub-antenna 200 and the second sub-antenna 300 is relatively low, thereby compensating for the inductive blind area problem that originally existed directly below when the rod antenna was used, and the maximum hanging height can reach 6-7m. Since the length of the first sub-antenna 200 and the second sub-antenna 300 in the horizontal direction increases after being bent, it can eliminate the inductive blind area directly below while meeting the higher hanging height, and ensure that it has a larger inductive range in the horizontal direction.

[0036] Further, in one embodiment, the length of the first sub-antenna 200 is 28-32 mm, and the length of the second sub-antenna 300 is 28-32 mm; the diameter of the first sub-antenna 200 is 0.4-0.7 mm, and the diameter of the second sub-antenna 300 is 0.4-0.7 mm; the distance between the first end and the third end along the width direction of the microwave sensor circuit board 100 (i.e. Figure 5 The length of a in the figure is 0.3-0.6 mm, and the distance between the first end and the third end along the length direction of the microwave sensor circuit board 100 (i.e. Figure 5 The length of b in the figure is 1.6-2 mm. Preferably, the distance between the first sub-antenna 200 and the second sub-antenna 300 along the length direction of the microwave sensor circuit board 100 is 1.8 mm. The distance between the second end 220 and the fourth end 320 along the length direction of the microwave sensor circuit board 100 (i.e. Figure 4 The length of c in the figure is 20-25 mm, that is, the width of the entire antenna is 20-25 mm. The distance from the highest point on the first sub-antenna 200 to the upper surface of the microwave induction circuit board 100 (i.e. Figure 4 The length of d in the figure is 14-18 mm, and the distance from the highest point on the second sub-antenna 300 to the upper surface of the microwave sensor circuit board 100 (i.e. Figure 4 The length of e in the figure is 14-18mm; the length of the microwave sensing circuit board 100 is 30mm, the width is 20mm, and the thickness is 0.8mm. In one embodiment, the bending portion of the first sub-antenna 200 is an acute-angle structure, and the bending portion of the second sub-antenna 300 is an acute-angle structure. In another embodiment, the bending portion of the first sub-antenna 200 is an arc-shaped structure, and the bending portion of the second sub-antenna 300 is an arc-shaped structure. In other embodiments, according to the model of the lamp, the hanging height of the lamp and other requirements, the length, diameter, distance and height between the first sub-antenna 200 and the second sub-antenna 300 and other parameters of the antenna can be further adjusted, which will not be repeated here.

[0037] See also Fig.12 The microwave sensing circuit board 100 includes a substrate and a main control circuit 110, a high-frequency microwave circuit 120, a voltage stabilizing circuit 130, a voltage comparison circuit 140, and a power voltage divider circuit 150 arranged on the substrate. The first sub-antenna 200 and the second sub-antenna 300 are both electrically connected to the high-frequency microwave circuit 120. The high-frequency microwave circuit 120 and the power voltage divider circuit 150 are respectively electrically connected to the voltage comparison circuit 140. The voltage comparison circuit 140 is electrically connected to the main control circuit 110. The voltage stabilizing circuit 130 is respectively electrically connected to the main control circuit 110 and the external controlled device. The power voltage divider circuit 150 is electrically connected to the external power supply. During the operation of the high-gain antenna microwave module, the power voltage divider circuit 150 receives voltage from the external power supply and supplies power to the main control circuit 110. The high-frequency microwave circuit 120 oscillates and generates an oscillation signal. The oscillation signal is transmitted to the environment in the form of electromagnetic waves through the first sub-antenna and the second sub-antenna, and forms a signal in the environment such as Fig. 9 and 10 In the sensing area shown, when a person or an object enters the sensing area, the electromagnetic wave reflected by the person or the object is received by the antenna again, and the signal is fed back to the high-frequency microwave circuit 120, so that the oscillation frequency of the high-frequency microwave circuit 120 changes. In this way, the voltage comparison circuit 140 compares the voltage of the high-frequency microwave circuit 120 with the reference voltage to determine whether there is a person or an object moving in the sensing area. When a valid signal is detected (i.e., there is a person or an object moving), the main control circuit 110 sends an electrical signal, which is further transmitted to the external controlled device after being stabilized by the voltage stabilizing circuit 130 to drive the external controlled device.

[0038] Please read further Figure 13-17In this embodiment, the main control circuit includes a single-chip microcomputer U1 of model FT61F02F-MRB, which is electrically connected to an external power supply (5V), including an RX pin and a TX pin for transmitting and receiving data with an external device, a CLK pin connected to a clock, a LUX pin connected to an external photoresistor or a photosensitive circuit, a DAT pin connected to a storage module to store data, an RF pin for accessing an oscillation signal, and an OUT pin for outputting a control signal. The high-frequency microwave circuit includes a single-chip microcomputer U3 of model SMR580M, a capacitor C20 connected to the first pin of the single-chip microcomputer U3 and connected to an antenna, a resistor 12 and a capacitor 19 connected to the third pin of the single-chip microcomputer U3 and grounded, a capacitor C18 connected to the fourth pin of the single-chip microcomputer U3, a capacitor C17 and a resistor R13 connected to the fifth pin of the single-chip microcomputer U3 and arranged in parallel, and resistors R14-16 connected to the seventh pin of the single-chip microcomputer U3 and in parallel, wherein the resistor R14 is grounded through the capacitor C6, and the resistors R15-16 are grounded respectively. The power supply voltage divider circuit includes a resistor R10 connected to the power supply, a resistor R11 arranged in parallel and connected in series with the resistor R10, and a capacitor C16. The power supply voltage divider circuit is used to divide the power supply voltage and output a reference voltage. The voltage comparison circuit includes a voltage comparator U2B and a voltage comparator U2A arranged in series, which are respectively connected to the reference voltage output by the power supply voltage divider circuit, and are connected to the voltage (detection voltage) output by the high-frequency microwave circuit. By comparing the reference voltage and the detection voltage, the comparison result is transmitted to the single-chip microcomputer U1 through the RF pin of the single-chip microcomputer U1, so that the single-chip microcomputer U1 can judge the movement of the person or object according to the detection result. The voltage stabilization circuit includes a voltage stabilizer of model HT7550. When a valid signal appears, the single-chip microcomputer U1 outputs a control voltage through the OUT pin, and the control voltage is stabilized by the voltage stabilizer of the voltage stabilization circuit and transmitted to the controlled device to achieve the purpose of controlling the operation of the controlled device.

[0039] In practical applications, the high-gain antenna microwave module of this embodiment can be applied to household appliances such as lamps, fans, air purifiers, and air conditioners. Furthermore, the utility model also discloses a lamp, including a lamp body and a switch electrically connected to the lamp body, the lamp also includes the above-mentioned high-gain antenna microwave module, and the microwave induction circuit board of the high-gain antenna microwave module is electrically connected to the switch to control the on and off of the switch.

[0040] The high-gain antenna microwave module and the lamp improve the antenna gain by bending the antenna. After the high-frequency signal generated by the microwave sensing circuit board 100 is transmitted through the first sub-antenna 200 and the second sub-antenna 300, the sensing area formed directly below the high-gain antenna microwave module is increased, thereby solving the problem of the axial coverage blind spot of the monopole rod antenna. The maximum hanging height of the high-gain antenna microwave module can reach 6-7m, and by designing the antenna as a dipole composed of the first sub-antenna 200 and the second sub-antenna 300, the problem of the narrowing of the beam angle after the antenna is bent can be solved. While increasing the installation height range of the high-gain antenna microwave module and the lamp, the sensing distance around it does not change significantly, thereby ensuring the sensing effect and reliability of the high-gain antenna microwave module and the lamp.

[0041] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A high-gain antenna microwave module, characterized in that: The invention comprises a microwave sensing circuit board and an antenna electrically connected to the microwave sensing circuit board, wherein the antenna comprises a first sub-antenna and a second sub-antenna which are arranged at intervals and fixed on the microwave sensing circuit board, the first sub-antenna is bent along a first direction approaching the second sub-antenna to form a first end electrically connected to the microwave sensing circuit board and a second end suspended above the microwave sensing circuit board, the second sub-antenna is bent along a second direction parallel to and opposite to the first direction to form a third end electrically connected to the microwave sensing circuit board and a fourth end suspended above the microwave sensing circuit board, the angle between the line connecting the first end and the third end and the first direction is greater than 0°, and the second end and the fourth end jointly form a signal transceiver of the antenna.

2. The high-gain antenna microwave module according to claim 1, characterized in that: The length of the first sub-antenna is 28-32 mm, and the length of the second sub-antenna is 28-32 mm.

3. The high-gain antenna microwave module according to claim 1, characterized in that: The diameter of the first sub-antenna is 0.4-0.7 mm, and the diameter of the second sub-antenna is 0.4-0.7 mm.

4. The high-gain antenna microwave module according to claim 1, characterized in that: The distance between the first end and the third end along the width direction of the microwave induction circuit board is 0.3-0.6 mm, and the distance between the first end and the third end along the length direction of the microwave induction circuit board is 1.6-2 mm.

5. The high-gain antenna microwave module according to claim 1, characterized in that: The distance between the second end and the fourth end along the length direction of the microwave induction circuit board is 20-25 mm.

6. The high-gain antenna microwave module according to claim 1, characterized in that: The distance from the highest point on the first sub-antenna to the upper surface of the microwave sensing circuit board is 14-18 mm, and the distance from the highest point on the second sub-antenna to the upper surface of the microwave sensing circuit board is 14-18 mm.

7. The high-gain antenna microwave module according to claim 1, characterized in that: The bending part of the first sub-antenna is an acute-angle structure, and the bending part of the second sub-antenna is an acute-angle structure.

8. The high-gain antenna microwave module according to claim 1, characterized in that: The bending part of the first sub-antenna is an arc-shaped structure, and the bending part of the second sub-antenna is an arc-shaped structure.

9. The high-gain antenna microwave module according to claim 1, characterized in that: The microwave induction circuit board includes a substrate and a main control circuit, a high-frequency microwave circuit, a voltage stabilizing circuit, a voltage comparison circuit, and a power supply voltage divider circuit arranged on the substrate. The first sub-antenna and the second sub-antenna are both electrically connected to the high-frequency microwave circuit, the high-frequency microwave circuit and the power supply voltage divider circuit are respectively electrically connected to the voltage comparison circuit, the voltage comparison circuit is electrically connected to the main control circuit, the voltage stabilizing circuit is respectively electrically connected to the main control circuit and an external controlled device, and the power supply voltage divider circuit is electrically connected to an external power supply.

10. A lamp, comprising a lamp body and a switch electrically connected to the lamp body, characterized in that: It also includes the high-gain antenna microwave module according to any one of claims 1 to 9, wherein the microwave sensing circuit board of the high-gain antenna microwave module is electrically connected to a switch to control the on and off of the switch.

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