Nonlinear node detection module, security check device and security check door

Abstract

The invention provides a nonlinear node detection module, a security check device and a security check door. The non-linear node detection module comprises an antenna plate, an antenna assembly and a non-linear node detection unit, the antenna assembly and the nonlinear node detection unit are both arranged on the antenna plate; the antenna assembly comprises a transmitting antenna and a receiving antenna assembly which are electrically connected with the nonlinear node detection unit respectively; the receiving surface of the receiving antenna assembly faces the transmitting antenna and is obliquely arranged on the antenna plate, the transmitting surface of the transmitting antenna faces the receiving antenna assembly and is obliquely arranged on the antenna plate, and the receiving antenna assembly and the transmitting antenna are located at different heights in the gravity direction. The transmitting antenna and the receiving antenna assembly are inclined to face each other, so that the receiving antenna assembly can conveniently receive the harmonic signal which corresponds to the transmitting antenna and is reflected from the detection target, and the detection reliability and the detection efficiency are improved.

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