Method for modulating a microwave frequency wave, transmission system carrying out this method, and radar comprising a system of this type
AssigneeThales
InventorsPatrick GARREC, Jean-Michel HODE, Richard MONTIGNY
Life of this patent
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Abstract
A wave transmitted by an antenna made up of an array of radiating elements, two pulse waves are transmitted, each modulated by a phase shift law known as modulation phase shift, the phase shifts being in opposition, a first wave being transmitted by a sub-array of radiating elements referred to as odd and the second wave being transmitted by a second sub-array of radiating elements referred to as even, the two sub-arrays being interleaved, the transmitted wave being the combination of the first wave and the second wave.
Claims9
A method for modulating a microwave frequency pulse wave, wherein, the wave being transmitted by means of an antenna made up of an array of radiating elements, two pulse waves are transmitted, each modulated by a phase shift law known as modulation phase shift, the phase shifts being in opposition, a first wave being transmitted by a sub-array of radiating elements referred to as odd and the second wave being transmitted by a second sub-array of radiating elements referred to as even, the two sub-arrays being interleaved, the transmitted wave being the combination of said first wave and said second wave, said two waves being obtained from the same pulse signal (s(t)), said signal being modulated by a first modulation phase shift for the odd radiating elements and by a second modulation phase shift for the even elements,
- said first modulation phase shift is applied to the rising edge of the pulse by varying from −π/2 to 0 and to the falling edge by varying from 0 to −π/2;
- said second modulation phase shift is applied to the rising edge of the pulse by varying from π/2 to 0 and to the falling edge by varying from 0 to π/2.
Dependencies are inferred from the claim text.