VERY LOW FREQUENCY ANTENNA TECHNIQUES
SYLVANIA ELECTRIC PRODUCTS INC WALTHAM MASS
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The transient response of simple RLC circuits to pulsed carriers is determined by circuit Q or by the ratio of R to L or C. This consideration does not apply to configurations where it is possible to insert or remove a reactive element with the appropriate amount of stored energy at instants when the other reactive element has zero stored energy. This permits instantaneous switching of the output between zero and the conventional steady state condition as often as once in each cycle of the carrier. Other subjects include the admittance of a rectangular slot which is backed by a rectangular cavity and excited by a current source connecte across its center, slot antenna impedance measurements by means of measuring null widths, and the integral equation for the electric field distribution in the slot is solved for the longitudinal field variation by Hallens iteration method.