Accession Number : AD0258702

Title :   AN INVESTIGATION OF THE JUNGLE GYM PERIODIC STRUCTURE

Descriptive Note : Research rept.

Corporate Author : POLYTECHNIC INST OF BROOKLYN N Y MICROWAVE RESEARCH INST

Personal Author(s) : MOHR,BERNARD

Report Date : 09 MAY 1961

Pagination or Media Count : 69

Abstract : A jungle gym periodic structure, an array of square bars contained within a square waveguide is discussed; it is suitable for use, both, as a linear accelerator, and for high power traveling wave tubes, since heat can be conducted directly to the walls of the guide. Characteristics of the jungle gym, determined experimentally, are the propagation characteristics, internal Q, and coupling impedance. Resonance frequency measurement, tangent method, and the perturbation technique, necessary in order to obtain the abovementioned characteristics, are given. In addition, a structure, the wire loaded cylindrical guide structure, closely related to the jungle gym, is described. Both structures exhibit a slow backward fundamental space harmonic and large bandwidth. Bandwidths obtained for the jungle gym structure, dependent on its periodic length, range from about 2000 to 3600 mc, with an approximate midband frequency of 4700 mc. (Author)

Descriptors :   *LINEAR ACCELERATORS, *MICROWAVE EQUIPMENT, *TRAVELING WAVE TUBES, *WAVEGUIDES, CAVITY RESONATORS, ELECTRICAL IMPEDANCE, ELECTRON ACCELERATORS, MATHEMATICAL ANALYSIS, PERTURBATION THEORY, PROPAGATION, RADIOFREQUENCY FILTERS, RESONANCE, WAVEGUIDE FILTERS, WIRE

Distribution Statement : APPROVED FOR PUBLIC RELEASE