| 摘要 |
PURPOSE:To form a mono-pulse pattern with simple circuit constitution by providing a means having a variable attenuator between a combination input terminal of a power combiner and a distribution output terminal of a power two-distributer and controlling the attenuation of the variable attenuator. CONSTITUTION:A caption 1 shows antenna element arrays arranged on a circle and a caption SP3T2 is a switch to select eight antenna elements to be excited among 24 antenna elements. The signal is divided into two systems by the power two-distributer 3; one is directed to an output terminal 6 and the other is routed to an output terminal 7. The system directed to the output terminal 6 forms a sum pattern by the power combiner 5. A phase shifter 4(hereafter referred to as 0 deg./180 deg. phase shifter) varying a phase shift of 180 deg. inverts the phase of a signal through one side four elements and the remaining four elements of eight consecutive antenna element arrays selected by the switch SP3T2 among signals toward the output terminal 7. The signal passing through the 0 deg./180 deg. phase shifter forms a difference pattern by the power combiner 5.
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