Patent ID: 9077307
Filing Date: 2015-07-07
Classification: H03H

Abstract:
1. A passive, quadrature, RC polyphase filter (PPF) stage operative at Extremely High Frequencies (EHF), comprising: a first input, to which a negative In-phase signal is connected; a second input, to which a positive In-phase signal is connected; a third input, to which a positive Quadrature signal is connected; a fourth input, to which a negative Quadrature signal is connected; first, second, third, and fourth outputs corresponding to the respective first, second, third, and fourth inputs; a resistor interposed between each respective input and output; a first capacitor coupled between the first input and second output; a second capacitor coupled between the second input and fourth output; a third capacitor coupled between the third input and first output; a fourth capacitor coupled between the fourth input and third output; wherein a conductor connecting the second input to the second capacitor has a substantially equal length to another conductor connecting the third input to the third capacitor; and wherein respective conductors connecting the first, second, third, and fourth capacitors to the respective output thereof all have a substantially equal length.