Wide area coverage millimeter wave radar transmit-receive system
By adopting the principle of simultaneous antennas in millimeter wave radar technology, the synthetic beam antennas are designed, which solves the problems of narrow coverage angle, high material cost and difficult positioning in the existing technology, and achieves efficient wide-area coverage and target positioning.
Patent Information
- Application Number
- CN202421115082.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-05-21
AI Technical Summary
When existing millimeter-wave radar technology covers wide areas, the coverage angle is narrow, the material cost is high, the structure is complex, and the pitch direction angle design cannot be achieved, and the target position information cannot be positioned.
Using the principle of sum and difference antenna, the phase difference between the left and right halves of the first antenna array is designed to be 180°, and the phase difference between the left and right halves of the second antenna array is 0°. By synthesizing the sum and difference beam antennas, the horizontal coverage of the synthetic horizontal direction is achieved to reach 140°, and the normal gain is enhanced by 3dB.
The radar system with large-angle millimeter wave coverage is effectively expanded, which solves the problem of narrow coverage angle, improves the front coverage distance and normal gain, and realizes the identification of target position information.
Smart Images
Figure CN222812932U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of millimeter wave radars, and more specifically, to a wide-area coverage millimeter wave radar transceiver system. Background Art
[0002] There are many technical solutions for achieving wide-area coverage of millimeter-wave radar, but all of them have various problems. For example, 1. The existing flat-panel array antenna has a small angle, and the half-power angle width is generally about 80 degrees, which cannot achieve coverage at a larger angle. 2. Through structural adjustments, angle coverage of specific areas can be achieved, but the material cost is high and the consistency cannot be controlled. 3. The existing wide-beam antenna has a complex structure and requires high processing accuracy; the normal gain becomes smaller, and the coverage distance in front becomes shorter; at the same time, the pitch direction angle design cannot be achieved as needed. 4. In a large coverage area, the existing simple wide-beam antenna system cannot locate the target position information.
[0003] Therefore, there is an urgent need for a new radar transceiver system to solve the above problems. Utility Model Content
[0004] The utility model provides a wide-area coverage millimeter-wave radar transceiver system that overcomes the above problems or at least partially solves the above problems, including:
[0005] A first antenna array, a second antenna array, a millimeter wave circuit unit, an ADC circuit unit, and a signal processing unit, wherein the left and right halves of the first antenna array have a phase difference of 180°, and the left and right halves of the second antenna array have a phase difference of 0°, wherein:
[0006] The first antenna array includes a first receiving antenna and a first transmitting antenna, the second antenna array includes a second receiving antenna and a second transmitting antenna, the input end of the millimeter wave circuit unit is connected to the first antenna array and the second antenna array, the output end of the millimeter wave circuit unit is connected to the ADC circuit unit, and the ADC circuit unit is connected to the signal processing unit.
[0007] The ADC circuit unit is used to collect data and transmit the data to the signal processing unit.
[0008] The signal processing unit is used to perform signal analysis on the data to achieve target detection in the radar coverage area.
[0009] The signal processing unit is also used to identify target location information in the coverage area according to the signal strength difference of the wide-area coverage millimeter-wave radar transceiver system.
[0010] Among them, the synthetic horizontal coverage of the wide-area coverage millimeter-wave radar transceiver system reaches up to 140°, and the normal gain is enhanced by 3dB.
[0011] The embodiment of the utility model provides a wide-area coverage millimeter-wave radar transceiver system, which adopts the sum-difference antenna principle and realizes sum-difference beam antenna synthesis on the radar transceiver system, which can effectively expand the radar system with large-angle millimeter-wave coverage and solve the problem of narrow coverage angle of millimeter-wave radar products when applied. The normal gain of the antenna directly in front of the radar is strong, which effectively improves the coverage distance directly in front of the radar. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a schematic diagram of the structure of a wide-area coverage millimeter-wave radar transceiver system provided by an embodiment of the utility model;
[0013] Figure 2 It is a schematic diagram of the module structure of the wide-area coverage millimeter-wave radar transceiver system provided by an embodiment of the utility model;
[0014] Figure 3 It is an operation flow chart provided by an embodiment of the utility model;
[0015] Figure 4 It is the horizontal coverage pattern of the first antenna array of the radar transceiver system provided by the embodiment of the utility model;
[0016] Figure 5 It is the horizontal coverage pattern of the second antenna array of the radar transceiver system provided by the embodiment of the utility model;
[0017] Figure 6 It is a synthetic horizontal coverage pattern of a radar transceiver system provided by an embodiment of the utility model;
[0018] Figure 7 It is a comparison between the coverage pattern of the radar transceiver system provided by the embodiment of the utility model and the horizontal pattern of the antenna in the prior art;
[0019] Figure 8 The radar system provided by the utility model embodiment identifies the target location area. DETAILED DESCRIPTION
[0020] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0021] Figure 1 Schematic diagram of a wide-area coverage millimeter-wave radar transceiver system structure provided by an embodiment of the utility model. Figure 1 As shown, including:
[0022] A first antenna array, a second antenna array, a millimeter wave circuit unit, an ADC circuit unit, and a signal processing unit, wherein the left and right halves of the first antenna array have a phase difference of 180°, and the left and right halves of the second antenna array have a phase difference of 0°, wherein:
[0023] The first antenna array includes a first receiving antenna and a first transmitting antenna, the second antenna array includes a second receiving antenna and a second transmitting antenna, the input end of the millimeter wave circuit unit is connected to the first antenna array and the second antenna array, the output end of the millimeter wave circuit unit is connected to the ADC circuit unit, and the ADC circuit unit is connected to the signal processing unit.
[0024] Among them, 101 is the first receiving antenna of the embodiment of the utility model, 102 is the second receiving antenna of the embodiment of the utility model, 103 is the second transmitting antenna of the embodiment of the utility model, 104 is the first transmitting antenna of the embodiment of the utility model, 105 is the millimeter wave circuit unit of the radar transceiver system of the embodiment of the utility model, 106 is the ADC circuit unit of the embodiment of the utility model, and 107 is the signal processing unit of the embodiment of the utility model.
[0025] Figure 2 Schematic diagram of the module structure of the wide-area coverage millimeter-wave radar transceiver system provided by the embodiment of the utility model. Figure 2 As shown, the millimeter wave circuit unit, ADC circuit unit, and signal processing unit provided by the utility model are actually composed of chip boards with independent structures. Figure 1 The comparison can clearly show the connection relationship between the various units, and the utility model will not be repeated here.
[0026] Figure 3 It is an operation flow chart provided by the embodiment of the utility model, such as Figure 3 As shown, the millimeter wave radar transceiver system provided by the embodiment of the utility model starts to work normally after power-on, and the millimeter wave operating frequency is 77GHz; the first antenna array of the radar transceiver system adopts a phase difference of 180 degrees to achieve a large range of coverage in the horizontal direction; the second antenna array of the radar transceiver system has a phase difference of 0 degrees, and the system normal gain becomes stronger, thereby increasing the coverage distance directly in front.
[0027] To sum up, the embodiment of the utility model adopts the principle of sum and difference antennas to realize sum and difference beam antenna synthesis on the radar transceiver system, which can effectively expand the radar system with large-angle millimeter wave coverage and solve the problem of narrow coverage angle of millimeter wave radar products when applied. The normal gain of the antenna directly in front of the radar is strong, which effectively improves the coverage distance directly in front of the radar.
[0028] Based on the above embodiments, the ADC circuit unit is used to collect data and transmit the data to the signal processing unit.
[0029] It can be understood that, referring to Figure 3 as shown, when the ADC circuit unit of the first-issuing system collects the intermediate-frequency signal, it will send the intermediate-frequency signal to the signal processing unit for processing.
[0030] Based on the above embodiments, the signal processing unit is used to perform signal analysis on the data to achieve target detection in the radar coverage area.
[0031] Based on the above embodiments, the signal processing unit is further used to identify the target position information in the coverage area according to the signal intensity difference of the wide-area coverage millimeter-wave radar transceiver system. It can be understood that, referring to Figure 2 as shown, the signal processing unit analyzes the intermediate-frequency signal and detects the target through the strength of the signal. If A(IF1)>A(IF2), the target is detected in area 1. If A(IF1)<A(IF2), the target is detected in area 2.
[0032] Therefore, the embodiments of the present invention can identify the position information of the target in area one and area two according to the signal intensity difference of the transceiver system.
[0033] Based on the above embodiments, the synthesized horizontal direction coverage of the wide-area coverage millimeter-wave radar transceiver system reaches up to 140°, and the normal gain is enhanced by 3 dB.
[0034] It should be noted that the synthesized horizontal direction coverage of the transceiver antenna system can reach 140 degrees; the normal gain of the system is enhanced by 3 dB, the coverage distance in the direct front increases, and at the same time, by adjusting the signal intensity threshold of the radar transceiver system, a larger range of angle coverage can be achieved.
[0035] In order to verify the performance of the millimeter-wave radar transceiver system, the embodiments of the present invention conducted a simulation experiment, and the experimental results are as Figure 4-7 shown, Figure 4 is the horizontal coverage pattern of the first antenna array of the radar transceiver system provided by the embodiments of the present invention; Figure 5 is the horizontal coverage pattern of the second antenna array of the radar transceiver system provided by the embodiments of the present invention; Figure 6 is the synthesized horizontal coverage pattern of the radar transceiver system provided by the embodiments of the present invention; Figure 7 is the comparison between the coverage pattern of the radar transceiver system provided by the embodiments of the present invention and the horizontal pattern of the antenna in the prior art. Figure 7 The solid curve in Figure 7 is the coverage pattern of the radar system of the present invention, and the dashed curve in Figure 8 The radar system provided by the utility model embodiment identifies the target location area.
[0036] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.
[0037] Finally, the method of this application is only a preferred implementation scheme and is not intended to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A wide-area coverage millimeter-wave radar transceiver system, characterized in that: include: A first antenna array, a second antenna array, a millimeter wave circuit unit, an ADC circuit unit, and a signal processing unit, wherein the left and right halves of the first antenna array have a phase difference of 180°, and the left and right halves of the second antenna array have a phase difference of 0°, wherein: The first antenna array includes a first receiving antenna and a first transmitting antenna, the second antenna array includes a second receiving antenna and a second transmitting antenna, the input end of the millimeter wave circuit unit is connected to the first antenna array and the second antenna array, the output end of the millimeter wave circuit unit is connected to the ADC circuit unit, and the ADC circuit unit is connected to the signal processing unit.
2. The wide-area coverage millimeter-wave radar transceiver system according to claim 1, characterized in that: The ADC circuit unit is used to collect data and transmit the data to the signal processing unit.
3. The wide-area coverage millimeter-wave radar transceiver system according to claim 2, characterized in that: The signal processing unit is used to perform signal analysis on the data to achieve target detection in the radar coverage area.
4. The wide-area coverage millimeter-wave radar transceiver system according to claim 3, characterized in that: The signal processing unit is also used to identify target location information in the coverage area according to the signal strength difference of the wide-area coverage millimeter-wave radar transceiver system.
5. The wide-area coverage millimeter-wave radar transceiver system according to claim 4, characterized in that: The wide-area coverage millimeter-wave radar transceiver system has a synthetic horizontal coverage of up to 140°, and a normal gain enhancement of 3dB.