What is series arm impedanceand shunt arm impedance?
Answers
Answer:
symmetrical lattice is a two-port electrical wave filter in which diagonally-crossed shunt elements are present – a configuration which sets it apart from ladder networks. The component arrangement of the lattice is shown in the diagram below. The filter properties of this circuit were first developed using image impedance concepts, but later the more general techniques of network analysis were applied to it.
There is a duplication of components in the lattice network as the "series impedances" (instances of Za) and "shunt impedances" (instances of Zb) both occur twice, an arrangement that offers increased flexibility to the circuit designer with a variety of responses achievable. It is possible for the lattice network to have the characteristics of: a delay network,[1] an amplitude or phase correcting network,[2] a dispersive network [3] or as a linear phase filter,[4]:412 according to the choice of components for the lattice elements.
Answer:
A symmetrical pi-attenuator pad has a series arm of resistance 1000 Ohm and shunt arms each of 500 Ohm. Determine (a) its characteristic impedance, and (b) the insertion loss (in decibels) when feeding a matched load. The pi-attenuator pad is shown in Figure 41.20. terminated in its characteristic impedance, R0.