Dual channel direction finder and its self-calibration method

Abstract

The invention discloses a dual-channel direction measurement machine and a self-correction method thereof and relates to the technical field of devices for determining the direction through radio waves. The dual-channel direction measurement machine comprises an ANT antenna which is located outside a housing; the ANT antenna is connected with a processing board and two routes of A / D (Analog to Digital) modules through two routes of radio frequency modules; the two routes of A / D modules are connected with an input end of the processing board; a network interface is inset in the housing; the network interface is electrically connected with the processing board through a network card module; a direct current power supply is electrically connected with the processing board and used for supplying a power supply for the processing board and other modules for which the power needs to be supplied; an antenna control module is located outside the housing and used for receiving the control information output through the processing board; a positioning module is electrically connected with the processing board and used for implementing the positioning of the position of the direction measurement machine; a positioning module antenna is located outside the housing and used for transmitting collected signals to the positioning module. According to the dual-channel direction measurement machine and the self-correction method thereof, a signal generation module, a switch control module, a transmission cable, a switch and the like do not need to be corrected any longer and accordingly the complexity and the production cost of the direction measurement machine are reduced.

Description

technical field [0001] The invention relates to the technical field of devices for measuring directions by radio waves, in particular to a dual-channel direction finding machine and a self-calibration method thereof. Background technique [0002] Cables inside the DF receiver and between the antenna and the DF receiver generate additional phase differences that must be eliminated for phase-sensitive DF methods. The conventional method is to generate the homologous correction signal regularly and feed it to the receiving antenna, and receive the signal to calculate the phase difference between the channels, and then subtract it from the phase difference of the received sky signal to obtain the real phase difference of the signal, and finally The direction orientation of the signal is obtained through the direction finding algorithm. This traditional method has many disadvantages, such as: it needs to specially design the correction source circuit and the antenna switching co...

AI Technical Summary

Problems solved by technology

This traditional method has many disadvantages, such as: it needs to specially design the correction source circuit and the antenna switching control circuit; it needs to control the receiving antenna to switch between the correction source and the sky signal; it reduces the data acquisition rate and interrupts the data continuity. ;Increased data traffic; increased data calculation, etc.

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