Abstract: A switching circuit (100) is provided, comprising: a signal coupler (110) configured to receive first and second input signals and provide first and second coupled signals; a first phase shifter (130) configured to shift a first phase of the first coupled signal by zero degrees or ninety degrees based on a first control signal to generate a first shifted signal; a second phase shifter (135) configured to shift a second phase of the second coupled signal by zero degrees or ninety degrees based on a second control signal to generate a second shifted signal; and a combiner (150) configured to combine the first and second shifted signals. The first coupled signal includes an in-phase copy of the first input signal and a ninety-degree-shifted copy of the second input signal; and the second coupled signal includes an in-phase copy of the second input signal and a ninety-degree-shifted copy of the first input signal.

Abstract: A split power control circuit includes a solid state switch and a circuit or circuit element, such as a relatively large resistance or reactance connected between an RF signal line and ground. In order to provide relatively more precise control and thus relatively finer adjustment of the RF signal line, the RF signal line is split into a plurality of branches, with the switched control circuit or element connected to one or more of the branches. In another embodiment of the present invention, a solid state switch and serially connected circuit or circuit element, such as a resistance or reactance, are connected between an RF signal line and ground. The gate terminal of the solid state switch is capacitively coupled to the switch terminal (i.e. drain or source) connected to the RF signal line, forcing the gate bias element to become a fixed, rather than switched, load, thereby minimizing errors due to the gate biasing element and enabling tuning reactances to be used to compensate for such gate loads.

Abstract: A split power control circuit includes a solid state switch and a circuit or circuit element, such as a relatively large resistance or reactance connected between an RF signal line and ground. In order to provide relatively more precise control and thus relatively finer adjustment of the RF signal line, the RF signal line is split into a plurality of branches, with the switched control circuit or element connected to one or more of the branches. In another embodiment of the present invention, a solid state switch and serially connected circuit or circuit element, such as a resistance or reactance, are connected between an RF signal line and ground. The gate terminal of the solid state switch is capacitively coupled to the switch terminal (i.e. drain or source) connected to the RF signal line, forcing the gate bias element to become a fixed, rather than switched, load, thereby minimizing errors due to the gate biasing element and enabling tuning reactances to be used to compensate for such gate loads.