Arrangement for extracting divergence-measuring modes from a corrugated guide and tracking antenna incorporating same
AssigneeThomson-CSF
InventorSerge Drabowitch
Life of this patent
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Abstract
An arrangement is described for extracting divergence-measuring modes from a corrugated guide connected on the one hand to a corrugated horn and on the other to a utilization device. The arrangement includes at least two pairs of collector waveguides lying in diametrically opposite positions along the corrugated guide to which they are coupled by slots formed in the wall of the corrugated guide in which the divergence-measuring modes are propagated. Two, at least, of these modes are extracted as a function of their phase velocity and are processed to produce divergence-measuring signals. The arrangement is advantageously used in antennas for tracking satellites or missiles.
Claims15
An arrangement for extracting divergence-measuring modes propagating in a corrugated guide having a wall with an inner surface provided with a multiplicity of transverse grooves having a depth of the order of a quarter wavelength of an operating frequency, said grooves being spaced apart by a fraction of said wavelength, said divergence-measuring modes being upper-odd modes derived from a hybrid fundamental mode propagated along said guide, said arrangement comprising collecting means coupled to said guide for extracting therefrom said divergence-measuring modes, said collecting means being so constructed that the phase velocity of their fundamental mode is equal to that of the divergence-measuring modes.
Dependencies are inferred from the claim text.