Thanks for pointing out this will make lossless network. I meant the source impedance should be quite low.
I tried to fine some singly terminated prototypes for LC ladders. Could you please suggest some good references?
nrk1 wrote on Dec 5th, 2015, 3:02am:With zero Rs and infinite RL, you will have a lossless(=undamped) network with poles/zeros on the imaginary axis. One of the resistances has to be non-zero. In that case, you can design singly terminated ladder filters. Singly terminated prototypes are also available, or you can solve the nonlinear equations for the component values in matlab or a symbolic solver.