Phase-linear wide band frequency conversion

Details Phase-linear wide band frequency conversion Phase-linear wide band frequency conversion

H - Electricity

03

D

H03D 7/00 (2006.01) H03D 3/00 (2006.01) H04L 27/18 (2006.01) H04L 27/36 (2006.01) H04L 27/00 (2006.01)

Patent

CA 2358643

A phase-linear wide band converter for frequency conversion from a multi-octave baseband (BB) to an RF band or vice versa and utilising I/Q signal processing. The converter uses a phase-linear power divider/combiner having three ports, an I/Q mixer stage, an I/Q power divider for an I/Q local oscillator (LO) signal, two wide band balanced mixers, and impedance matching circuits. The improved performance over multi-octave bands is due to the mutually adaptation between an active opamp I/Q power divider/combiner at an extended baseband, a single low-pass filter (LPF) having predetermined amplitude and phase characteristics and being inserted in the baseband signal path to or from the active baseband power divider/combiner, and a baseband phase correction stage.

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