PCB Structures for Common Mode Suppression on Differential Microstrip Lines
Common mode noise on differential microstrip lines can be suppressed by PCB embedded filters. These filters are basically resonators, and only the common mode signal can couple to them. Though such structure suppress common mode signal only in narrow bands because of the resonant nature, they can be combined to produce broadband filtering effect. The dimension of such filters could be further reduced by adding lumped elements. In this paper, design principles of the PCB filters are given, and examples are given to demonstrate these rules. At last, a new PCB filter structure is proposed with an electrical size of only 0.04λ×0.067λ which is capable of suppressing the higher order harmonics of common mode signal.
Q. Liu et al., "PCB Structures for Common Mode Suppression on Differential Microstrip Lines," Proceedings of the 2014 IEEE International Symposium on Electromagnetic Compatibility (2014, Raleigh, NC), vol. 2014-September, no. September, pp. 533-537, Institute of Electrical and Electronics Engineers (IEEE), Sep 2014.
The definitive version is available at http://dx.doi.org/10.1109/ISEMC.2014.6899029
2014 IEEE International Symposium on Electromagnetic Compatibility (2014: Aug. 3-8, Raleigh, NC)
Electrical and Computer Engineering
Keywords and Phrases
Electromagnetic compatibility; Microstrip lines; Natural frequencies; Organic pollutants; Polychlorinated biphenyls; Common mode signal; Common-mode filters; Common-mode suppressions; Design Principles; Differential signal; Filtering effects; Higher order harmonics; Quarter-wavelength; Signal processing; lower resonant frequency
International Standard Serial Number (ISSN)
Article - Conference proceedings
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