how to design a IF input stage for superheterodyne receiver

who can tell me how to design a IF input stage for superheterodyne receiver
the IF frequency is about 180MHZ,and followed by external LC BPF.
as i known, the IF LC BPF must be match with IF input stage,but i don't know how to design it.(if the BPF matched resister is low, is it necessary to design a COMMOM GATE(CG) stage to match the LC BPF? or directly Gate input?(CS).

An option is to use a diplexer placed after the mixer, followed by the LC BPF.
The LC BPF shall be matched on 50 ohms on both sides, to optimize for a low in-band ripple and low insertion loss.
The first IF stage will be also matched for 50 ohms at its input.

i know the first IF stage must be matched with BPF,but what structure of the input stage is used usually in superheterodyne receiver,CS,CG,CD?,thanks!

CG

can you give me some reference about it ,thanks

Is it that CG has low impedance,that's why this configuration is used?

may i use CS IF input stage and a resistor is add between GATE for matching? my IF frequency is about 200MHZ.

Use LC network for matching and resistors for bias.

LC matching is used when frequency is higher than 500MHZ in most commercial product, why?

Added after 2 minutes:

i mean when frequency is lower than 500MHZ, few products use LC matching

Whatever frequency is used a resistive matching introduce the same noise figure degradation.
A reactive matching network (LC) will introduce minimal losses.