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METHOD OF SYSTEM COMPENSATION TO REDUCE THE EFFECTS OF SELF INTERFERENCE IN FREQUENCY MODULATED CONTINUOUS WAVE ALTIMETER SYSTEMS
METHOD OF SYSTEM COMPENSATION TO REDUCE THE EFFECTS OF SELF INTERFERENCE IN FREQUENCY MODULATED CONTINUOUS WAVE ALTIMETER SYSTEMS
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机译:减少频率调制连续波高度计系统中自干扰影响的系统补偿方法
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摘要
An altimeter system is provided. The altimeter system includes a receiver mixer including an antenna-input and a local-oscillator-input; a transceiver circulator communicatively coupled to an antenna via a transmission line having a selected length and communicatively coupled to the antenna-input of the receiver mixer; and a transmitter configured to output a transmitter signal to the antenna via the transceiver circulator. The transmitter signal is frequency modulated with a linear ramp. The transmitter is communicatively coupled to the receiver mixer to input a local oscillator signal at the local-oscillator-input of the receiver mixer. The receiver mixer is communicatively coupled to input a target-reflected signal from the antenna at the antenna-input of the receiver mixer. The selected length of the transmission line is set so that a composite-leakage signal at the antenna-input of the receiver mixer has a linear phase across a sweep bandwidth.
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