Nancy A. Kuester

Abstract: An expression for the gain of a curtain array antenna over a perfectly conducting, flat Earth with no mutual impedance between elements is derived in this report. A FORTRAN computer subroutine created to calculate the expression is described here. This subroutine considers interelement spacing and length of the individual elements, the spacing between the radiators and the reflecting screen behind the radiators, the antenna design and operating frequencies, and the number of elements in the array.

Keywords: antenna gain; curtain array antenna; HF broadcast

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