Before revision: The rows of holes in some tracks, called via fences, are not filtering structures but form part of the enclosure.Bahl, pp.290–293.Benoit, pp.44–51.Lundström, pp.80–82 The PCB inside a 20GHz Agilent N9344C spectrum analyser showing various microstrip distributed element filter technology elements A distributed element filter is an electronic filter in which capacitance, inductance and resistance (the elements of the circuit) are not localised in discrete capacitors, inductors and resistors as they are in conventional filters.
After revision: The rows of holes in some tracks, called via fences, are not filtering structures but form part of the enclosure.Bahl, pp.290–293.Benoit, pp.44–51.Lundström, pp.80–82 The PCB inside a 20GHz Agilent N9344C spectrum analyser showing various microstrip distributed-element filter technology elements A distributed-element filter is an electronic filter in which capacitance, inductance and resistance (the elements of the circuit) are not localised in discrete capacitors, inductors and resistors as they are in conventional filters.