METHOD AND ARRANGEMENT FOR PERFORMING ANALOG SIGNAL PROCESSING AND MEASURING BETWEEN A SIGNAL SOURCE AND A LOAD

摘要

A method and arrangement is shown for performing analog signal processing tasks like impedance matching, phase shifting, and/or signal filtering on a signal path from a signal source to a load so that a number of electrical components is smaller than that of solutions according to prior art for performing corresponding analog signal processing tasks. The signal source can be e.g. a power amplifier of a transmitter and the load can be e.g. an antenna of the transmitter. A solution is shown in which a same ninety degree phase shifter element (910) is used for performing more than one of the analog signal processing tasks of the kind mentioned above.