Patent ID: 6140888
Filing Date: 2000-10-31
Classification: H01P,H01R

Abstract:
A base station of a radio system, comprising:at least two transmitters;filter means, each one of which is connected to an output of the corresponding transmitter so as to filter signals obtained from an output of the transmitter concerned and to supply the filtered signals further, said filter means being adjustable and comprising adjustment means for changing the band-pass frequency of the filter means; anda summing member with in-connectors, each one of which is connected to an output of the corresponding filter so as to receive and combine the filtered signals, and an out-connector for supplying the combined signals to antenna means of the base station, at least one of the connectors of the summing member being coaxial and comprising an elongated rod-like inner conductor and a substantially tubular outer conductor surrounding the rod-like inner conductor, and a moveable part of low-loss dielectric material or ferrimagnetic material, said movable part surrounding at least the inner conductor and being moveable lengthwise of the inner conductor;said summing member comprising actuators responsive to the adjustment means for moving the moveable part so a to adjust the phase angle of a wave reflecting from said at least one connector and to tune the summing network of the base station in connection with a frequency change.