Ultracompact 60-GHz CMOS BPF Employing Broadside-Coupled Open-Loop Resonators

This letter presents a 60-GHz ultracompact on-chip bandpass filter (BPF). The designed filter is based on a unique structure, which consists of two overlapped broadside-coupled open-loop resonators, achieving a high level of miniaturization. Moreover, each resonator is loaded by a metal–insulator–metal capacitor to get further miniaturization. Defected ground structure pattern is constructed under the filter structure to enhance the insertion loss (IL). This BPF is designed and fabricated using a standard 0.18-<inline-formula> <tex-math notation="LaTeX">$\mu \text{m}$ </tex-math></inline-formula> complementary metal–oxide–semiconductor technology for millimeter-wave applications. The fabricated BPF chip size is <inline-formula> <tex-math notation="LaTeX">$240 \times 225~\mu \text{m}^{2}$ </tex-math></inline-formula> including pads. The measured results agree well with the simulation ones and show that the BPF has an IL of 3.3 dB at 59.5-GHz center frequency, and a bandwidth of 12.9 GHz.

[1]  Quan Xue,et al.  A Broadside-Coupled Meander-Line Resonator in 0.13- $\mu \text{m}$ SiGe Technology for Millimeter-Wave Application , 2016, IEEE Electron Device Letters.

[2]  Hsu Cheng-Ying,et al.  A 60-GHz Millimeter-Wave Bandpass Filter Using 0.18-$\mu\hbox{m}$ CMOS Technology , 2008, IEEE Electron Device Letters.

[3]  Ramesh K. Pokharel,et al.  60 GHz on-chip mixed coupled BPF with H-shaped defected ground structures , 2016 .

[4]  Ramesh K. Pokharel,et al.  Compact Size On-Chip 60 GHz H-Shaped Resonator BPF , 2016, IEEE Microwave and Wireless Components Letters.

[5]  Kaixue Ma,et al.  Miniaturized 60-GHz On-Chip Multimode Quasi-Elliptical Bandpass Filter , 2013, IEEE Electron Device Letters.

[6]  Jia-Sheng Hong,et al.  Microstrip filters for RF/microwave applications , 2001 .

[7]  M. Hayati,et al.  Compact dual-band bandpass filter using open loop resonator for multimode WLANs , 2012 .

[8]  D. Ritter,et al.  Compact Modeling and Comparative Analysis of Silicon-Chip Slow-Wave Transmission Lines With Slotted Bottom Metal Ground Planes , 2009, IEEE Transactions on Microwave Theory and Techniques.

[9]  Keiji Yoshida,et al.  60GHz-band low loss on-chip band pass filter with patterned ground shields for millimeter wave CMOS SoC , 2011, 2011 IEEE MTT-S International Microwave Symposium.

[10]  E. Pistono,et al.  High-Performance Shielded Coplanar Waveguides for the Design of CMOS 60-GHz Bandpass Filters , 2012, IEEE Transactions on Electron Devices.

[11]  Xiang Yi,et al.  A 65 nm CMOS LNA for Bolometer Application , 2016 .