Lumped Element Filters, using discrete capacitors and inductors, are the technology of choice below 500MHz and are useful to 3GHz.
Efficient filter prototypes such as elliptic and psuedo-elliptic, which give very steep rejections can be realised.
A very wide range of circuits can be offered :-
Diplexers including Lowpass/Highpass DiplexersHighpass
Allpass equalisation networks and phase or amplitude equalisers
Drop in or Connectorised versions available