Multi-beam same-frequency microwave detection antenna and manufacturing method and detection method thereof

Abstract

The invention discloses a multi-beam same-frequency microwave detection antenna and a manufacturing method and a detection method thereof. The multi-beam same-frequency microwave detection antenna isprovided with an oscillation circuit unit and comprises a reference ground and at least two radiation sources, wherein the radiation source has a feed point. The radiation sources are spaced apart inthe reference ground, and a radiation slot is formed between each of the radiation sources and the reference ground respectively. The feed point of the radiation source is electrically connected to the oscillation circuit unit.

Description

technical field [0001] The invention relates to the field of microwave antennas, in particular to a multi-beam same-frequency microwave detection antenna and its manufacturing method and detection method. Background technique [0002] In recent years, with the development of microwave technology, more and more products using microwave technology appear on the market, for example, microwave detectors. Common microwave detectors can emit microwaves and receive reflected microwave signals, and use the principle of Doppler effect to detect whether there are moving objects in the target area. Microwave detectors have high sensitivity to the movement of objects that reflect microwaves, and the microwave signals generated by microwave detectors are not affected by factors such as ambient temperature and humidity. Compared with infrared detectors, they have higher reliability. Therefore, microwave detectors are widely used in industrial production and our daily life, for example, ...

AI Technical Summary

Problems solved by technology

However, due to the differences in the parameters of the electrical components in different circuits, it is difficult for the frequencies of the microwaves radiated by the microwave detectors to be consistent and synchronized. When different microwave detectors detect the same target area, on the one hand, each microwave The microwaves emitted by the detectors will interfere with each other. On the other hand, when the detection areas of the microwaves radiated by different microwave detectors overlap, in the overlapping area, the frequencies of the microwaves emitted by each microwave detector are difficult to be consistent, or even if the frequencies are consistent It may also happen that the microwave radiated by one antenna is at the peak, and the microwave radiated by the other antenna is at the trough. In the subsequent calculation process, it is necessary to use cumbersome algorithms to solve the relevant parameters of the frequency of the received microwave. , for example, to calculate the parameters of the frequency difference of different received microwaves

In this way, the difficulty of obtaining the motion state of the object in the target area is further increased

Moreover, at the current stage, it is difficult for those skilled in the art to obtain an accurate algorithm, and at the same time, complex calculation logic will cause the calculation time of the microwave detector to be relatively long, causing the time to acquire the motion state of the object in the target area to be limited. hysteresis, thereby affecting the accuracy of the microwave detector in detecting motion of objects within the target area

[0007] Therefore, the increase in the number of microwave detectors will inevitably increase the cost and the complexity of connecting multiple microwave detectors into a system. When the centrally installed microwave detectors are working, the microwave beams radiated by each microwave detector will also interfere with each other between the secondary lobes (such as side lobes, rear lobes) other than the main lobe, so that the microwave detectors Can not work normally

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