want to convert preamp from VHF 2 FM

[jaya000]

I hv this VHF preamp. I want to modify so that it can be used for FM 88-108Mhz. I want to change the input output filter. But i want to study the circuit first. Hence i hv downloaded & atttached .s2p files of the devices used. But they just start from 100Mhz.
I want to know how the designer has designed circuit & calculated input output impedance? On this basis how he designed VHF filters for preamp 48-230Mhz with 28db gain?
I hv just not calculated/tested the ferrite choke value.
I hv collected even the datasheets of the devices used. If required i can post it here.
I am newbie to RF, hence expecting experts here to put some light on the circuit used.

preamp.rar

 

[jaya000]

Surprised to c that there is no reply. There is another posting regarding FM transmitter. This can be also a small transmitter if designed for FM then connected with suitable antenna with little circuit modification.

 

[AN920]

Analyzing something like this normally involves smith charts and lots of complicated calculations. It may be difficult for someone to fully explore on this board.