狭帯域多層形電波吸収材の一設計法

概要

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An approximate design method is described for microwave absorbers consisting of lossy dielectrics which are horizontally stratified. This method consists of starting with a transmission-line filter (each length of line is one quarter-wave long at center frequency) and then replacing each transmission line element by a lossy dielectric counterpart. The approximation introduced is W_i = ξ_i, where W_i is the characteristic impedance of transmission line and ξ_i is the real part of the characteristic impedance of lossy dielectric. The response of the multi-layer is then exactly known by means of electronic computation. In consequence, the given condition (f = 9-11 [GHz] , VSWR = 40 [dB]) is satisfied. Variation of frequency characteristics caused by error of dielectric constant is also explained. This design method is superior to cut-and-try method in the fact that the frequency characteristics can be given first.
山形大学の論文
1969-03-20