. The Bell System technical journal . - 2n -nonu,_ no SIN a 2rr Fig. 13—Pattern of Tapered Rectangular Antenna. Simple examination shows that the new direction of the radiation maximumis at right angles to a uniphase surface, as we would intuitively expect. Thisphenomenon has particular relevance to the design of scanning antennas. Effect on Pattern of Square Law Phase Variation If we assume a constant amplitude and a square law phase variation (t){x) = —kixover the aperture a/2 < x < a/2 then the substitution 27r . X = 1 i2 L sm a X + 2k 2 _ (44) RADAR ANTENNASreduces (36) to the fo

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. The Bell System technical journal . - 2n -nonu,_ no SIN a 2rr Fig. 13—Pattern of Tapered Rectangular Antenna. Simple examination shows that the new direction of the radiation maximumis at right angles to a uniphase surface, as we would intuitively expect. Thisphenomenon has particular relevance to the design of scanning antennas. Effect on Pattern of Square Law Phase Variation If we assume a constant amplitude and a square law phase variation (t){x) = —kixover the aperture a/2 < x < a/2 then the substitution 27r . X = 1 i2 L sm a X + 2k 2 _ (44) RADAR ANTENNASreduces (36) to the form /- (a) = - e V ^ ^ - e k-2 J Equation (45) can be evaluated with the help of Fresnels Integrals[ cos X dX, j sin X dX dX 243 (45). ANGLE f A 1 OFF AXIS / • * \\ N t —\ < 4 Uq 1 / i p J\ Ab) /v n 2n -2n -ny ^ _ j]_g__5iN_a

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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1