Dolph-Tchebyscheff arrays of many elements and arbitrary uniform spacing /

The optimum design of Dolph-Tchebyscheff broadside arrays of an odd number of elements presents definite computational problems in terms of existing excitation coefficient design procedures, particularly for element spacings of less than a half-wavelength. This paper presents approximate representations for these coefficients in terms of Bessel functions for arrays of, say, more than twenty elements of arbitrary but uniform spacing. To facilitate comparison of the approximations with exact theory, graphs and tables are presented for various main beam--sidelobe ratios, numbers of array elements, and element spacing. (Author).Research supported by the Microwave Physics Laboratory, Air Force Cambridge Research Laboratories, Office of Aerospace Research, United States Air Force, L.G. Hanscom Field, Massachusetts.Microwave Physics Laboratory Project 4600.At head of title: "Research Report."AD0605810 (from http://www.dtic.mil)."June 1964."Includes bibliographical references (page 35).The optimum design of Dolph-Tchebyscheff broadside arrays of an odd number of elements presents definite computational problems in terms of existing excitation coefficient design procedures, particularly for element spacings of less than a half-wavelength. This paper presents approximate representations for these coefficients in terms of Bessel functions for arrays of, say, more than twenty elements of arbitrary but uniform spacing. To facilitate comparison of the approximations with exact theory, graphs and tables are presented for various main beam--sidelobe ratios, numbers of array elements, and element spacing. (Author).Mode of access: Internet