Patent ID: 6078299
Filing Date: 2000-06-20
Classification: H01Q,H03H

Abstract:
A coupler for shifting the phase of a radio frequency input signal into at least two output signals that are phase shifted with respect to one another comprising:a) an input circuit for receiving a radio frequency input signal;b) an inductive output circuit, connected to said input circuit to receive the input signal, for shifting inductively the phase of the input signal, said inductive output circuit outputting a first radio frequency output signal having a phase which lags a phase associated with the input signal, said inductive output circuit comprising a transformer having a first and a second coil, said first coil connected to said input circuit to receive the radio frequency input signal and said second coil inductively coupled to said first coil for outputting the first radio frequency output signal; andc) a capacitive output circuit, connected to said input circuit to the radio frequency input signal, for shifting capacitively the phase of the radio frequency input signal, said capacitive circuit outputting a second radio frequency output signal having a phase which leads the phase of the radio frequency input signal.