Low frequency antenna array phase measurement apparatus based on GPS and phase detection chip

• Main Authors: HE LESHENG, WANG MIN, DONG LIANG, BAI ZHENGYAO, SHI SHUOBIAO, WANG WEILIAN
• Format: Patent
• Language: Chinese; English
• Published: 27.11.2013
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

A low frequency antenna array phase measurement apparatus based on the GPS and a phase detection chip is disclosed. The hardware part of the apparatus comprises a GPS signal receiving module, a signal generation and control circuit, and a phase difference detection and comparison circuit, wherein the circuit data output end of the GPS signal receiving module is connected with the data receiving end of the signal generation and control circuit, a main control chip in the signal generation and control circuit is connected with the signal control end of a DDS, and a DDS signal output end is connected with the calibration signal input end of a receiving device. The output ends of the receiving device are grouped in a pairwise manner after transmitting through long electric cables, the pairwise output ends are connected with two analogue input ends of the phase difference detection and comparison circuit, and the direct current detection output end of the phase difference detection and comparison circuit is connec