A 3D penetrating wall radar system

Abstract

The invention discloses a three-dimensional through-wall radar system, which includes a frequency source, a transmitter, a transmitting antenna, a receiving antenna, a receiver, a signal processing board and a power supply, and the frequency source, the transmitter and the receiver are integrated on the same PCB board , forming a radio frequency integrated board; the signal processing board is connected to the radio frequency integrated board through an inter-board connector; the power supply is fixed on the radio frequency integrated board, and is directly connected to the signal processing board through a power interface; Both the transmitting antenna and the receiving antenna are located on the periphery of the radio frequency integrated board. The invention has the advantages of simple and compact structure, light weight, simple, fast and reliable connection and the like.

Description

technical field [0001] The invention mainly relates to the technical field of wall-penetrating radar, in particular to a three-dimensional wall-penetrating radar system. Background technique [0002] Since the radar is used for detection through walls, considering the low-frequency penetration is better, the operating frequency of the radar should not be too high, which will cause the antenna size to not be too small, so that the overall size of the radar will be too large. Taking into account the anti-interference ability of the radio frequency circuit, each functional module is shielded with a separate structure, and finally fixed on the metal frame (realizing the common ground between the modules), so the weight of the whole machine will be much larger and the structure will be complicated. In addition, the ports of the radio frequency circuit can only be connected through radio frequency cables, which increases signal attenuation. The battery is also connected to the cor...

AI Technical Summary

Problems solved by technology

[0004] 1. Large size and heavy weight: In the existing technology, in order to achieve better anti-interference ability, each circuit module is basically installed with an independent shielding structure. Each module is sealed with a metal structure and then stacked, which will inevitably increase the thickness of the radar. And lead to the heavy weight of the whole machine; or all the circuit modules are placed in a metal structure with many small shielding cavities, and finally a large metal plate is needed to fix each module and share the ground, which is also large in size and heavy in weight

In addition, the RF cables and other cables between the modules are long and bulky, which will inevitably lead to heavy weight of the whole machine

[0005] 2. Low signal-to-noise ratio: In the prior art, the antenna and the radio frequency circuit are connected through radio frequency cables. In some radars, a radio frequency switch is added between the antenna and the radio frequency circuit, which will inevitably increase the noise of the receiving link , leading to a deterioration of the signal-to-noise ratio

However, in the prior art, each module is installed independently, which inevitably requires radio frequency line connection and radio frequency switch to switch

[0006] 3. The battery power supply efficiency is low and the connection is complicated: in the prior art, due to the independent packaging of each module, the battery and the power supply circuit can only be connected and powered by cables, and the loss on the cables is serious, which reduces the battery power supply efficiency ; and the connection of the movement is complicated, which may easily lead to connection errors

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