Filters

source: EGGO Space s.r.o ; ESA SPCD 2018 Symposium

EPCI e-symposium library article

Advances in MLCC manufacturing have resulted in significant improvements in the voltage and capacitance capability to be packaged into ever-smaller capacitor case sizes. These advances have also positively affected Discoidal capacitors, used in most bulkhead mounted EMI Suppression Filters.

Currently, Discoidal capacitors can be manufactured with outer diameters as small as 0.050″ with as much as 5,000 pF of capacitance. Additionally, advanced Discoidal capacitors have equivalent models, which are efficient and therefore allow effective insertion loss in the GHz range, 10 GHz and beyond.

With proper filter design & utilization, these discoidal capacitors can result in high performance filters that exhibit significant volume and weight savings, both of which are critical in many aerospace and similar applications.

This paper will discuss the progress of filter miniaturization & development of Bulk Head Mounted EMI Filters. Comparisons will be made illustrating electrical and physical progress of modern, currently available end filters. Some of the challenges involved with miniaturization will be briefly discussed and predictions of future advances identified.

published by EPCI under approval of ESA SPCD 2018 organizing committee.

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