filter types between antenna and LNA?

[7rots51]

where can I find good design formula and calculations or software for Helical Filter at VHF(100~200 MHZ)?

in LC filter design for pre-LNA applications what filter type and order is normally used?What is the min value of Q for L and C ?

 

[VSWR]

http://tonnesoftware.com/helical.html

**broken link removed**

"Filters With Helical and Folded Helical Resonators" by Peter Vizmuller, Artech House, ISBN 0890062447

 

[james cook]

I think most of the filter for the front end system is the cavity filter assuming not very wideband.

 

[peleda]

that frequency range may be too low for microstrips.
Lumped elements should work fine.