what are some active components in it?
diodes, transistors
Distributed-element circuit
but active components (such as diodes, transistors, and some passive components) are discrete
what is distributed-element circuit? They are electrical circuits composed of lengths of transmission lines or other distributed components.
wiki:17470348
Distributed-element circuit [SEP] Active components
Distributed elements are usually passive, but most applications will require active components in some role. A microwave hybrid integrated circuit uses distributed elements for many passive components, but active components (such as diodes, transistors, and some passive components) are discrete. The active components may be packaged, or they may be placed on the substrate in chip form without individual packaging to reduce size and eliminate packaging-induced parasitics. Distributed amplifiers consist of a number of amplifying devices (usually FETs), with all their inputs connected via one transmission line and all their outputs via another transmission line. The lengths of the two lines must be equal between each transistor for the circuit to work correctly, and each transistor adds to the output of the amplifier.