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Abstract

A method for processing an antenna pattern in which a first antenna system is placed to correspond with a first direction in relation to the beam width to be compressed, a second antenna system of the monopulse power feed system is placed to correspond with a second direction lying at a right angle to the first direction, in which an antenna beam of the first and the second antenna systems is scanned in a direction other than the first and the second directions. A sum signal .SIGMA.1, a difference signal .DELTA.1 and sum signal .SIGMA.2, difference signal .notident.2 are formed in hybrid circuits, and an output signal two-dimensionally compressed are obtained as a result of adding a signal resulting from the subtraction of the difference signal .DELTA.1 from the sum signal .SIGMA.1 to a signal resulting from the subtraction of the difference signal .DELTA.2 from the sum signal .SIGMA.2 in a signal processing section. Moreover, the signal processing section outputs the value obtained by adding a signal resulting from the difference signal .DELTA.1 being subtracted from the sum signal .SIGMA.1 to a signal resulting from the difference signal .DELTA.2 being subtracted from the sum signal .SIGMA.2 when the sum signal .SIGMA.1 is larger than the difference signal .DELTA.1 and when the sum signal .SIGMA.2 is larger than the difference signal .DELTA.2, otherwise outputs zero, so that an output signal which beam is compressed two-dimensionally and a side lobe is reduced two-dimensionally can be obtained.

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