A Millimeter-Wave CPW CMOS On-Chip Bandpass Filter Using Conductor-Backed Resonators

• Published in: IEEE electron device letters Vol. 31; no. 5; pp. 399 - 401
• Main Authors: Yeh, L.-K, Chen, C.-Y, Chuang, H.-R
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.05.2010; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Attenuation; Band pass filters; Bandpass filter (BPF); Bandpass filters; Circuits; CMOS; complimentary metal oxide semiconductor (CMOS); Conductors (devices); coplanar waveguide (CPW); Coplanar waveguides; Filtering theory; Magnetic separation; millimeter wave; Millimeter wave circuits; Millimeter wave communication; Millimeter wave integrated circuits; Millimeter wave technology; Resonator filters; Resonators; Simulation
• ISSN: 0741-3106; 1558-0563
• DOI: 10.1109/LED.2010.2043333

A novel millimeter-wave 35-GHz bandpass filter using coplanar waveguide structure is fabricated in a 0.18-¿m standard complimentary metal oxide semiconductor process. The conductor-backed half-wavelength resonators are utilized to realize stopband characteristics at desired frequencies. A series LC resonant circuit can generate one transmission zero located at 58 GHz. It is also observed that the parasitic effect can create another transmission zero at 80 GHz. Furthermore, the transmission zero at 66 GHz is designed with the use of a shorter conductor-backed resonator. The selectivity of the proposed filter is much improved. Without including the dummy metal, the chip size of the proposed filter is 0.225 × 0.55 mm 2 . The good agreement between simulation and measurement is obtained.