Patent ID: 6339711
Filing Date: 2002-01-15
Classification: H03D,H03F,H03G,H03L,H04B

Abstract:
A radio apparatus, comprising:a transmitting portion having a power amplifier configured to send a radio signal to an antenna; a receiving portion configured to receive a radio signal from the antenna; a transmission/reception switch configured to select one of said transmitting portion and said receiving portion; a transmission power detecting portion, connected or capacitance-coupled to a power supply portion supplying a power to drive the power amplifier, and configured to indirectly detect output power of the power amplifier by sensing the amount of fluctuation of the power of the power supply portion taking place when a radio signal is transmitted and to provide a corresponding transmission power signal; and a controlling portion configured to respond the transmission power signal from the transmitting power detecting portion to provide control of transmission power of the radio signal based thereon.