Best substrate for L-band(1.4Ghz) Microstrip Filter and alte

R

RafaP

Guest
Hi,

I have to design a Bandpass Ustrip filter centered at 1.4Ghz with 8%
BW.
As I check Rogers offers high dielectric constant substrates but it
doe not show the performance in L-band although I guess it is quite
stable and losses go down.
Any experience using Rogers 3006 at L-band ?

Would you consider any other substrate option or even any other Filter
tecnique(Lumped, ceramic filters,etc) at that frequency ?

Thanks.
Rafael
 
RafaP wrote:

Hi,

I have to design a Bandpass Ustrip filter centered at 1.4Ghz with 8%
BW.
As I check Rogers offers high dielectric constant substrates but it
doe not show the performance in L-band although I guess it is quite
stable and losses go down.
Any experience using Rogers 3006 at L-band ?

Would you consider any other substrate option or even any other Filter
tecnique(Lumped, ceramic filters,etc) at that frequency ?
Click to expand...
What loss figure?
What power level?

Unless you are after something special, the off the shelf ceramic filter
would be the best solution.

Vladimir Vassilevsky
DSP and Mixed Signal Design Consultant
http://www.abvolt.com
 
On Oct 20, 5:01 pm, Vladimir Vassilevsky <nos...@nowhere.com> wrote:
RafaP wrote:
Hi,

I have to design a Bandpass Ustrip filter centered at 1.4Ghz with   8%
BW.
As I check Rogers offers high dielectric  constant substrates but it
doe not show the performance in L-band although I guess it is quite
stable and losses go down.
Any experience using Rogers 3006 at L-band ?

Would you consider any other substrate option or even any other Filter
tecnique(Lumped, ceramic filters,etc) at that frequency ?

What loss figure?
What power level?

Unless you are after something special, the off the shelf ceramic filter
would be the best solution.

Vladimir Vassilevsky
DSP and Mixed Signal Design Consultanthttp://www.abvolt.com
Click to expand...

Hi,

I've been searching for ceramic filters but I dont want exactly what I
want(Off-the-shelf). Anyway, I'll be very thankful if you recommend me
more ceramic filter manufacturers.
I am going for ustrip because it allows me to do a full custom design
at the expense of some insertion losses that are not important in this
design.

Thank you.
 
On Thu, 21 Oct 2010 01:53:35 -0700 (PDT), RafaP
<rafael.palacio@gmail.com> wrote:

On Oct 20, 5:01 pm, Vladimir Vassilevsky <nos...@nowhere.com> wrote:
RafaP wrote:
Hi,

I have to design a Bandpass Ustrip filter centered at 1.4Ghz with   8%
BW.
As I check Rogers offers high dielectric  constant substrates but it
doe not show the performance in L-band although I guess it is quite
stable and losses go down.
Any experience using Rogers 3006 at L-band ?

Would you consider any other substrate option or even any other Filter
tecnique(Lumped, ceramic filters,etc) at that frequency ?

What loss figure?
What power level?

Unless you are after something special, the off the shelf ceramic filter
would be the best solution.

Vladimir Vassilevsky
DSP and Mixed Signal Design Consultanthttp://www.abvolt.com


Hi,

I've been searching for ceramic filters but I dont want exactly what I
want(Off-the-shelf). Anyway, I'll be very thankful if you recommend me
more ceramic filter manufacturers.
I am going for ustrip because it allows me to do a full custom design
at the expense of some insertion losses that are not important in this
design.

Thank you.
Click to expand...
Won't it get pretty big at this frequency? L-band is in that awkward
transition region between microstrip and lumped components.

John
 
Teflon based PCB stock worked pretty well for me the last time I did
L-band work 40 years ago, but there may be improvements in two
generations of materials.

You may want to mess around with (ahem, heuristically experiment) with
solid silver wire and ATC low-loss capacitors to see what lumped
component performance you can get. WInd the coils on a round
toothpick form. The toothpicks are available at the corner bar in an
olive salad with a wondeful clear dressing {;-)

Jim

On Wed, 20 Oct 2010 02:31:33 -0700 (PDT), RafaP
<rafael.palacio@gmail.com> wrote:

Hi,

I have to design a Bandpass Ustrip filter centered at 1.4Ghz with 8%
BW.
As I check Rogers offers high dielectric constant substrates but it
doe not show the performance in L-band although I guess it is quite
stable and losses go down.
Any experience using Rogers 3006 at L-band ?

Would you consider any other substrate option or even any other Filter
tecnique(Lumped, ceramic filters,etc) at that frequency ?

Thanks.
Rafael
Click to expand...
 
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