METHOD FOR CORRECTION OF FREQUENCY CHARACTERISTICS IN RANGE OF 2N DISCRETE FREQUENCY VALUES AND DEVICE FOR ITS REALIZATION Russian patent published in 2006 - IPC G01R23/04 H03H7/38 H01P5/00 

FIELD: radio communication and microwave engineering, applicable in designing of correctors of amplitude-frequency characteristics of receiving and transmitting communication channels at a preset quantity of fixed frequencies.

SUBSTANCE: the method consists in connection of permanent reactive elements between the matched element on the side of the input and the matched element on the side of the output. The common input of the divider for N frequency channels is connected to the matched element on the side of the input, and the common input of the adder for N frequency channels is connected to the matched element on the side of the output. Each channel of the adder is connected to the divider channel corresponding to one and the same frequency by means of a matching device. The input impedances of each m-th channel matching device are formed proceeding from the conditions of matching of the matched element on the side of the input at its m-th frequency with the input normalized impedances of each m-th matching device on the side of the divider. Mathematic formulas for calculation of these values are given in the claim. The device for correction of frequency characteristics in range of 2N discrete frequency values for matching, for example, of the signal source and antenna has matching devices in the form of an L-shaped connection of two two-terminal networks of reactive elements. The common input of the divider for N channels is connected to the signal source, and the common input of the adder for N channels is connected to the antenna. The divider and adder channels corresponding to one and the same adjacent pair of discrete frequency values are connected by channel matching devices. All the channel matching devices are made in the form of an L-shaped connection of two two-terminal networks. The formulas for calculation of conductance of these two-terminal networks are given in the claim. Each two-terminal network is made in the form of two series-connected parallel circuits.

EFFECT: expanded functional opportunities, with the matching at all 2N discrete frequencies remaining unchanged.

2 cl, 7 dwg