Patent ID: 8878627

Claim:
A monolithic power splitter for splitting a pair of input differential signal into two pairs of output differential signals, comprising: a first input terminal to receive a first input signal of the pair of input differential signals; a second input terminal to receive a second input signal of the pair of input differential signals, wherein the first input signal and the second input signal have substantially equal amplitude and 180 degree phase difference; a first one-by-two power splitter to split the first input signal into a first output signal with a first phase shift relative to the first input signal and a second output signal with a second phase shift relative to the first input signal, comprising a first input end electrically connected with the first input terminal, a first output end to output the first output signal, and a second output end to output the second output signal, wherein the first phase shift and the second phase shift are substantially equal; a second one-by-two power splitter to split the second input signal into a third output signal with a third phase shift relative to the second input signal and a fourth output signal with a fourth phase shift relative to the second input signal, comprising a second input end electrically connected with the second input terminal, a third output end to output the third output signal, and a fourth output end to output the fourth output signal, wherein the third phase shift and the fourth phase shift are substantially equal; and four output terminals to output two pairs of output differential signals, consisting of a first output terminal, a second output terminal, a third output terminal and a fourth output terminal, wherein the first output end, the second output end, the third output end, and the fourth end are one-to-one electrically connected to the four output terminals respectively, wherein each pair of the two pairs of output differential signals has two output signals with substantially equal amplitude and 180 degree phase difference, wherein the power of the first output signal and the second output signal are substantially equal; and the power of the third output signal and the fourth output signal are substantially equal.