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In this paper, a novel compact antenna of radio altimeter based on bi-layer substrate is presented, which is composed of bi-layer microwave circuits. A palisade-shaped conductor is placed on the upper substrate to enhance purity of the linear polarization, while a two-unit parallel-fed microstrip antenna array and its feeding network are laid on the lower substrate. This new kind of radio altimeter...
Monitors are small IPs that check critical systems, such as radio-altimeters that on-line control the landing phase in modern planes. It is essential to get correct information and avoid erroneous messages from these monitors. Asynchronous monitors are very robust to the environment variations; they remain functional in a wide range of power supplies or temperatures, and can reliably monitor synchronous...
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