Dual polarization calibration receiver used for airborne SAR

• Main Authors: SHU YONGJIANG, XIA YONG, ZHAO JIANNONG, XIA HAOMIAO, HE QIN
• Format: Patent
• Language: Chinese; English
• Published: 17.07.2013
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

In order to overcome a technical problem that an existing ground calibration receiver is greatly influenced by environment, the utility model provides a dual polarization calibration receiver used for an airborne SAR, comprising an antenna unit, a first reception channel unit, a second reception channel unit, a first AD sampling unit, a second AD sampling unit, a memory cell, a reference source unit, a microcomputer control unit, a temperature sensing correction unit, a self calibration unit, a direction control unit, and a time synchronization unit. Beneficial technical effects of the dual polarization calibration receiver are that reception channel gain self calibration is realized by using technologies of high-precision gain closed-loop control, standard channel gain comparison, gain error digital high-precision compensation, temperature correction function automatic compensation, etc. The dual polarization calibration receiver can complete high fidelity reception records of airborne SAR signals, and reali