High Resistive Silicon based low-pass active filter design for TV on mobile application

This paper deals with the design of a novel low-pass active filter for UHF band digital TV reception which enables to attenuate interfering GSM signals located in the 900 MHz band. An hybrid technology is employed for this design combining High Resistive Silicon (HR-Si) technology and common printed circuit board (PCB) one. The designed active filter is based on a lumped element 11-pole generalized Chebyshev filter associated to a negative resistance such as to compensate for the overall insertion loss and enhance the filter selectivity. All the lumped elements of the passive filter are integrated in the HR-Si substrate while the negative resistance is designed onto a FR4-based PCB. The complete design has been fully simulated and experimental prototypes realized and measured, demonstrating the benefits of the proposed design.