Patent ID: 8774737
Filing Date: 2014-07-08
Classification: H01Q,H03F,H03G,H04B

Abstract:
1. A transmission module comprising: a high frequency amplifier; an amplitude control unit that sets a gain of an input signal to said high frequency amplifier in a variable manner; a phase control unit that sets a phase of the input signal to said high frequency amplifier in a variable manner; a power supply voltage control unit that sets a power supply voltage to said high frequency amplifier in a variable manner; and a control circuit that controls said amplitude control unit, said phase control unit and said power supply voltage control unit in accordance with an input/output characteristic of the high frequency amplifier; wherein said control circuit and said power supply voltage control unit control said power supply voltage such that a gain of said high frequency amplifier becomes constant in accordance with an output power of said high frequency amplifier, said phase control unit includes: an oscillator; a frequency converter that is connected to an input side of said amplitude control unit; and a DDS that is connected to an input side of said frequency converter; and wherein an input signal to said high frequency amplifier is generated by carrying out frequency conversion of a baseband signal generated by said DDS by the use of a local signal generated by said oscillator and said frequency converter.