PROGRAMMABLE IMPROVED ACTIVE ISOLATOR FOR CANCELLATION OF LEAKAGE

摘要

PURPOSE: A programmable active isolator for cancelation of a leakage is provided to improve the linearity of a whole system by eliminating a leakage of RF signals without using frequency conversion. CONSTITUTION: A main isolating unit(110) is arranged in a main route. A leakage removal unit(120) including a voltage reducer(121) and a phase shifter(122) is arranged in a branch route branched off the main route and removes leaked signals. In the leakage removal unit, the voltage reducer and the phase shifter are integrated into a single chip.