Detection instrument, method and device for detecting article, and medium

The invention discloses a detection instrument, an article detection method, an article detection device and a medium, which are applied to the field of electromagnetic waves, the detection instrument comprises a control module and a transceiving front-end module, and the transceiving front-end module comprises a single-pole multi-throw switch, a plurality of transmitting antennas and a plurality of receiving antennas. Wherein the polarization directions of the at least two transmitting antennas and the at least two receiving antennas are different. And the single-pole multi-throw switch is respectively connected with the control module and the transmitting antennas and is used for transmitting the local oscillator signals sent by the control module to different transmitting antennas. As the polarization directions of the at least two transmitting antennas are different, the situation that the to-be-detected target carries the long-strip-shaped article and the placement direction of the long-strip-shaped arti