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.

microwave filters - waveguide

Status
Not open for further replies.

Mazi3

Advanced Member level 4
Full Member level 1
Joined
May 29, 2002
Messages
101
Helped
5
Reputation
10
Reaction score
3
Trophy points
1,298
Location
Europe
Activity points
960
Hi!

I would like to know how to design and then build filters in waveguide ; only digital and interdigital version, with open end (if there is lambda/4 to the end...).
I have some experience in building such filters, but none in the design.
Is there eny useful software, or exists theory with "cookbook"?

Regards!
 

g86

Full Member level 4
Full Member level 4
Joined
Jan 21, 2003
Messages
212
Helped
11
Reputation
22
Reaction score
7
Trophy points
1,298
Location
On top of antenna :))
Activity points
2,232
For software: you may synthesys with eseptum or cocafil and simulate with microwave wizard

:!: :idea: :?:

Mazi3 said:
Hi!

I would like to know how to design and then build filters in waveguide ; only digital and interdigital version, with open end (if there is lambda/4 to the end...).
I have some experience in building such filters, but none in the design.
Is there eny useful software, or exists theory with "cookbook"?

Regards!
 

Mazi3

Advanced Member level 4
Full Member level 1
Joined
May 29, 2002
Messages
101
Helped
5
Reputation
10
Reaction score
3
Trophy points
1,298
Location
Europe
Activity points
960
tnx, I'll se If demo will help me :) but they cost a whole bunch :)

I would like to design filter for 1.42G, 2.2GHz, 8-9 GHz
 

g579

Full Member level 6
Full Member level 6
Joined
Dec 31, 1999
Messages
322
Helped
19
Reputation
38
Reaction score
4
Trophy points
1,298
Location
Somewhere
Activity points
2,470
I think you use the word "waveguide" incorrectly. In general it means you use a (square or round cross section) tube as a transmission line.
 

Mazi3

Advanced Member level 4
Full Member level 1
Joined
May 29, 2002
Messages
101
Helped
5
Reputation
10
Reaction score
3
Trophy points
1,298
Location
Europe
Activity points
960
tnx, yes, i mean waveguide as a line, whre the fingers (resonators) are installed.

I've downloaded the demo software, but it's unusable. Demo has limits in frequency (>20GHz) which is not suitable for me. If there would be no "recipes" i'll try to do it in cut&try method :)

Maybe I'll get some recipes about doing that :)

Is there anybody who would help cutting the pipes? :) or have some ideas how to do it first time :)
 

Borber

Advanced Member level 5
Advanced Member level 5
Joined
Dec 31, 1999
Messages
1,600
Helped
235
Reputation
472
Reaction score
111
Trophy points
1,343
Location
on third flor
Activity points
11,862
filter

I have few programs for calculation interdigital and waveguide filters.
This can help I think. On basis of this software I have build filters successfuly.
LP Borber
 

Mazi3

Advanced Member level 4
Full Member level 1
Joined
May 29, 2002
Messages
101
Helped
5
Reputation
10
Reaction score
3
Trophy points
1,298
Location
Europe
Activity points
960
Hi!

Are those programs support filters with open ends? they are much simpler to build than those which are closed.
I would like to build filter from square aluminium pipes (standard sizes). does they support to enter physical dimensions and then it calculate the response?

Regards!
 

Borber

Advanced Member level 5
Advanced Member level 5
Joined
Dec 31, 1999
Messages
1,600
Helped
235
Reputation
472
Reaction score
111
Trophy points
1,343
Location
on third flor
Activity points
11,862
Included are programs for interdigital filter + GW Basic, waveguide filter and Excell file. Digifilt2.bas calculates open end filter build with square tube. It is written in GW Basic.

LP Borber
 

flatulent

Advanced Member level 6
Advanced Member level 6
Joined
Jul 19, 2002
Messages
4,626
Helped
489
Reputation
980
Reaction score
151
Trophy points
1,343
Location
Middle Earth
Activity points
46,689
scale the dimensions

One trick to avoid the frequency limit problem is to scale all dimensions inversely by the same factor as the frequency. This will get you close enough to use an analysis program to check and fine tune the scaled design.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top