Patent ID: 7218954

Claim:
A linear power amplifier (LPA) shelf for a mobile communication base station, the LPA shelf comprising: a signal dividing means that sets paths of at least one sector signal received according to LPA types determined by LPA installation and a number of frequency assignments (FAs), the signal dividing means including a first signal divider, a second signal divider and a third signal divider; a first switch means connected to the signal dividing means, that switches a first sector signal provided via a first path of set paths to a corresponding LPA; a phase adjusting means connected to the first and second signal dividers, that adjusts a phase of a second sector signal so as to correspond to the first sector signal, the second sector signal being provided via a second path of the set paths; a first LPA type conversion means connected to the third signal divider and the first switch means, that converts the LPA type; an LPA means connected to the first switch means, the phase adjusting means and the first LPA type conversion means, that amplifies at least one sector signal provided from the first switch means, the phase adjusting means and the first LPA type conversion means to a predetermined level; a second switch means connected to the LPA means, that switches to operate together the first switch means; a second LPA type conversion means connected to the LPA means, that switches to operate together the first LPA type conversion means; and a signal combining means connected to the LPA means and the second LPA type conversion means, that combines the at least one sector signal amplified by the LPA means according to respective sectors.