60-GHz Bandpass Filter Leverages Standard CMOS Process

April 16, 2009
With the increasing deMand for broadband multimedia applications, the 60-GHz band has garnered attention for short-range communications. Development has focused on on-chip antennas and filters integrated with low-cost, 60-GHz, integrated-CMOS ...

With the increasing deMand for broadband multimedia applications, the 60-GHz band has garnered attention for short-range communications. Development has focused on on-chip antennas and filters integrated with low-cost, 60-GHz, integrated-CMOS RF front-end circuitry. At Taiwan's National Cheng Kung University and National University of Tainan, a 60-GHz millimeter-wave on-chip bandpass filter has been designed and implemented using a 0.18-m standard CMOS process. This work was conducted by Chia-Hsieh Liu, Cheng-Ying Hsu, Chu-Yu Chen, and Huey-Ru Chuang.

To design the filter with two transmission zeroes, the researchers used the asymmetric compact microstrip resonator cell structure. The input and output capacitors, which utilize multilayer coupling, are added to create the passband. At a center frequency of 64 GHz, the filter has a 3-dB bandwidth of roughly 15 GHz. The center frequency's measured insertion loss is about 3.9 dB while return loss is better than 10 dB within the passband. See "60-GHz Bandpass Filter with ACMRC Resonator Fabricated Using 0.18-m CMOS Technology," Microwave And Optical Technology Letters, March 2009, p. 597.

About the Author

Nancy Friedrich | RF Product Marketing Manager for Aerospace Defense, Keysight Technologies

Nancy Friedrich is RF Product Marketing Manager for Aerospace Defense at Keysight Technologies. Nancy Friedrich started a career in engineering media about two decades ago with a stint editing copy and writing news for Electronic Design. A few years later, she began writing full time as technology editor at Wireless Systems Design. In 2005, Nancy was named editor-in-chief of Microwaves & RF, a position she held (along with other positions as group content head) until 2018. Nancy then moved to a position at UBM, where she was editor-in-chief of Design News and content director for tradeshows including DesignCon, ESC, and the Smart Manufacturing shows.

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