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PCB detector circuit - RF Cafe Forums
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jatbakar
Post subject: PCB detector circuit
Unread postPosted:
Mon Sep 06, 2004 5:47 am
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Lieutenant
Joined: Mon
Sep 06, 2004 5:43 am
Posts: 4
I am new to Rf design, and have
to design PCB layout for a detector circuit
using a voltage doubler
configuration.
I am simulating using MIcrowave Office and simulating
my matching circuit (double open stub).
1) I'm a bit stumped
with the results of my simulation in terms of S parameters. They dont
seem to change much, even when I remove or place a 100pF capacitor in
parallel with load.
2) Am unsure about designing my microstrip
matching element in PROtel. Any tips on this?
Thanks
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Jimbo
Post subject:
Unread postPosted: Wed
Sep 08, 2004 3:32 pm
We're going to need a little more information.
- What frequency range is the detector working in?
- What is
the impedance of the detector?
- What kind of substrate are you using?
- Are you using S-parameter files for the discrete components being
modeled, or mathematical models from the simulator?
All these
can explain the small change with or without the 100 pF capacitor.
Regarding impedance matching, MWO should provide libraries of impedance
transformer topologies, then the optimizer should take care of tuning.
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jatbakar2
Post subject: detector circuit
Unread postPosted: Tue Sep 14, 2004 11:43 pm
I am using a voltage
doubler configuration using Schottky HSMS 8202 from Agilent. I am planning
to use it at 900MHz
Im planning to use two different materials, FR4
and ROdgers duroid 5880, Er=2.2
Im using MWOffice's SPice model
of diode to model 8202 schottky, using Agilent supplied Spice parameters.
Is this sufficient to model the diodes in MWOffice, or should I be doing
more?
I have been using the optimizer to vary the length of the
stubs to obtain the best S11 and S22 values from linear simulator. Is
this appropriate?
Any help would be great as I am a complete
newbie to this area and a desperate undergrad
Posted 11/12/2012
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