3 results about "Unbalanced line" patented technology

A power amplifier circuit includes an input terminal, amplifiers, phase shifters, a converter circuit, and an output terminal. Each of the amplifiers is configured to amplify an input signal that is a radio-frequency signal received through the input terminal. The converter circuit is configured to convert a pair of balanced lines to an unbalanced line. The output terminal is coupled to the unbalanced line. The converter circuit includes balanced terminals that are respectively coupled to corresponding ones of the pair of balanced lines. The phase shifter is coupled between the output of the amplifier and the output of the amplifier. The phase shifter is coupled between the output of the amplifier and the output of the amplifier. The phase shifter is coupled between the output of the amplifier and the balanced terminal. The output of the amplifier is coupled to the balanced terminal.

The present application provides a kind of balanced-unbalanced transformer that can match the impedance between the circuit of front stage and the circuit of rear stage in wider frequency band.The balanced-unbalanced transformer has: the first wiring, with the first end connected with the first balance line of one of transmission balanced signal and the second end connected with the second balance line of another of transmission balanced signal;The second wiring has the first end grounded and the second end;The third wiring has the first end connected with the second end of the second wiring and the second end connected with the unbalanced line of transmission unbalanced signal, and is electromagnetically coupled with the second wiring;The first capacitor has the first end connected with the first end of the third wiring and the second end grounded;And the second capacitor has the first end connected with the second end of the third wiring and the second end grounded, and the first wiring is electromagnetically coupled with at least one of the second wiring and the third wiring.

A power amplifier circuit includes an input terminal, an output terminal, amplifiers, a balun, and semiconductor substrates. The amplifier amplifies a radio-frequency signal received at the input terminal. The amplifier further amplifies the radio-frequency signal amplified by the first amplifier. The balun is connected to the amplifier and converts an unbalanced line into two balanced lines. The amplifier and the amplifier are formed on the semiconductor substrate. One of the balanced lines is connected to a terminal of the output terminal. The other of the balanced lines is connected to a terminal of the output terminal. The frequency of a radio-frequency signal to be transmitted is 100 GHz or more. The balun is formed on the semiconductor substrate.