Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Coaxial resonator at 500MHz...1GHz

Status
Not open for further replies.
E

Eugen_E

Full Member level 6
Joined
Nov 29, 2004
Messages
383
Helped
44
Reputation
86
Reaction score
11
Trophy points
1,298
Location
Romania
Activity points
2,862
I want to use a coaxial resonator as the IF filter at 500MHz. The resonator will be made of copper, with no special treatment, maybe not even silver plating.
What selectivity can be expected from this?
The frequency stability on the long term and with temperature variation of 10-40°C is good enough for an IF filter, or it needs to be tuned periodically?
 

Coaxial resonator at 500MHz

copper or brass will oxide in the air and the thin layer of oxide is not good conudctor.
 

    E

    Eugen_E

    Points: 2
    Helpful Answer Positive Rating
Re: Coaxial resonator at 500MHz

Thanks for reply.
So silver plating is mandatory.
What about frequency stability in time and with temperature variation if silver plating is done.
 

So far i read the chapter about coaxial resonators in Microwave filters - Matthaei, Jones.
The diameter ratio should ensure a 76ohm impedance for minimum loss, and the structure will be silver or at least tin plated.

What is the simplest software you recommend for simulation? The main problems remaining are:
- temperature stability;
- size of the magnetic coupling loops.

By the way, this is not a commercial project, given the huge size of the filter.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top