DESIGN OF SIXTH-ORDER PASSIVE QUADRATURE SIGNAL GENERATION NETWORK BASED ON POLYPHASE FILTER

This paper presents a design of a sixth-order passive quadrature signal generation network for verifying the behavior of the passive polyphase filters in RF front-end low-IF transceivers applications. The transfer function of this network is derived based on the superposition principle and there are two maximum values (at frequencies 45 kHz, 100 MHz), and one minimum value at frequency 2 MHz. The IQ mismatch occurred at below 40 kHz and above 2 MHz in the observed frequency range 1 kHz to 10 MHz.