Post subject: PCB detector circuit
Mon Sep 06, 2004 5:47 am
Mon Sep 06, 2004 5:43 am
I am new to Rf design,
and have to design PCB layout for a detector circuit
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
Unread postPosted: Wed Sep 08, 2004 3:32 pm
We're going to need a little more information.
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?
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.
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
planning to use two different materials, FR4 and ROdgers duroid
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
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