Low-cost phased array radar system
By combining a one-dimensional phased array antenna and a signal processing module, two-dimensional scanning is achieved by utilizing carrier frequency variations, thus solving the problem of high cost of phased array radar and realizing a low-cost phased array radar system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 魏慰
- Filing Date
- 2026-02-08
- Publication Date
- 2026-04-21
AI Technical Summary
The high cost of phased array radar limits its application in certain situations.
By employing a one-dimensional phased array transmitting and receiving antenna and achieving two-dimensional scanning by changing the carrier frequency, combined with a signal processing module, the dependence on numerically controlled radio frequency phase shifters is reduced, thus constructing a low-cost phased array radar system.
It enables radar to measure position and velocity while reducing the cost of phased array radar.
Smart Images
Figure CN121899796A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of radar technology. Background Technology
[0002] Phased array radars can perform rapid beam scanning and are widely used in both civilian and military fields. Phased array antennas are a crucial component of phased array radars. However, the high cost of phased array antennas typically limits the application of phased array radar technology in certain situations. This invention proposes a radar system architecture that can reduce the cost of phased array antennas. Summary of the Invention
[0003] This invention includes a variable carrier frequency radio frequency transmitter, a one-dimensional phased array transmitting antenna, a one-dimensional phased array receiving antenna, a radio frequency receiver, and a signal processing module. The invention uses a one-dimensional phased array antenna as the basic antenna unit. Multiple one-dimensional phased array transmitting antennas are combined to form a two-dimensional phased array transmitting antenna. Multiple one-dimensional phased array receiving antennas are combined to form a two-dimensional phased array receiving antenna. The one-dimensional phased array transmitting antenna has the characteristic that when transmitting electromagnetic waves of different frequencies, its main lobe points in different directions. The one-dimensional phased array receiving antenna has the characteristic that when receiving electromagnetic waves of different frequencies, its main lobe points in different directions. Therefore, by changing the frequency of the output signal of the radio frequency transmitter, the main beam of the one-dimensional phased array transmitting antenna can be scanned within a certain spatial range. Similarly, the one-dimensional phased array receiving antenna can receive electromagnetic waves of different frequencies, with different frequencies received in different directions. The variable carrier frequency radio frequency transmitter can output radio frequency signals to one or more one-dimensional phased array transmitting antennas. When the variable carrier frequency radio frequency transmitter is connected to a one-dimensional phased array transmitting antenna, the beam of the one-dimensional phased array transmitting antenna can be scanned in one dimension in space by controlling the frequency of the output signal. When the variable carrier frequency radio frequency transmitter is connected to multiple one-dimensional phased array transmitting antennas, the combined beam of the multiple one-dimensional phased array transmitting antennas can be scanned in two dimensions in space by controlling the frequency and phase of the output signal. The signals received by the multiple one-dimensional phased array receiving antennas are amplified, down-converted, filtered, and sampled by the corresponding radio frequency receivers before being sent to the signal processing module. By combining the control of the transmitted electromagnetic wave frequency and the beam control algorithm of the signal processing module, the combined beam of the multiple one-dimensional phased array receiving antennas can be scanned in two dimensions in space. When the one-dimensional phased array transmitting antennas emit electromagnetic waves in different directions sequentially, the one-dimensional phased array receiving antennas can receive the electromagnetic waves reflected by the target in different directions.
[0004] The one-dimensional phased array transmitting antenna and the one-dimensional phased array receiving antenna described above do not require digitally controlled radio frequency phase shifters, and their cost is lower than that of traditional phased array antennas that use digitally controlled radio frequency phase shifters. This invention proposes a system architecture for phased array radar using the aforementioned one-dimensional phased array transmitting antenna and the one-dimensional phased array receiving antenna, which can reduce the cost of phased array radar while achieving the function of radar measuring position and velocity. Attached Figure Description
[0005] Figure 1 Embodiment 1 of the present invention is shown.
[0006] Figure 2 Embodiment 2 of the present invention is shown. Detailed Implementation
[0007] To make the technical solutions of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. While the working principle remains unchanged, the system composition of the present invention can be partially adjusted.
[0008] Figure 1 The illustrated embodiment 1 uses multiple one-dimensional phased array transmitting antennas and multiple one-dimensional phased array receiving antennas.
[0009] Figure 2 The illustrated embodiment 1 uses a one-dimensional phased array transmitting antenna and multiple one-dimensional phased array receiving antennas.
[0010] The above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and it should not be construed that the specific implementation of the present invention is limited to these descriptions. The described embodiments are some embodiments of the present invention, but not all embodiments. Any deductions or substitutions made by those skilled in the art based on the present invention are within the scope of protection of the present invention. All other embodiments obtained by those skilled in the art based on the present invention are within the scope of protection of the present invention.
Claims
1. This invention is a low-cost phased array radar system, comprising a radio frequency transmitter with a variable carrier frequency, a one-dimensional phased array transmitting antenna, a one-dimensional phased array receiving antenna, a radio frequency receiver, and a signal processing module; the radio frequency transmitter outputs radio frequency signals to one or more of the one-dimensional phased array transmitting antennas, the one-dimensional phased array transmitting antennas are used to transmit electromagnetic wave signals, and the one-dimensional phased array receiving antennas are used to receive electromagnetic wave signals reflected by a target.
2. The radio frequency transmitter with variable carrier frequency according to claim 1, characterized in that, It can output radio frequency signals using carrier waves of different frequencies; the radio frequency transmitter with variable carrier frequency can change the output to... The phase of the radio frequency signal of the one-dimensional phased array transmitting antenna according to claim 1.
3. The one-dimensional phased array transmitting antenna according to claim 1, characterized in that, When transmitting electromagnetic waves of different frequencies, the main lobe of the antenna's radiation pattern points in different directions.
4. The one-dimensional phased array receiving antenna according to claim 1, characterized in that, When receiving electromagnetic waves of different frequencies, the main lobe of the antenna's radiation pattern points in different directions.
5. The signal processing module according to claim 1, characterized in that, Receive the signal output by the radio frequency receiver according to claim 1, and calculate the position and velocity of the target based on the received signal.