An aircraft single-antenna FM radio altimeter. (Technical Feature).

From: Microwave Journal | Date: May 1, 2003| Author: Maloratsky, Leo G. | Copyright information

This article describes a frequency modulated single-antenna radio altimeter The entire structure includes a transmitter/receiver network with a single antenna for operation in both a continuous wave (CW) mode and an interrupted continuous wave (ICW) mode to provide a highly accurate altitude indication. An altimeter transmitter generates a constant FM period CW signal below a critical altitude and a variable FM period ICW signal above the critical altitude. The main advantages of t...

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