Thank you for visiting RF Cafe! Electronics World Cover,TOC,and list of posted Popular Electronics articles QST Radio & TV News Radio-Craft Radio-Electronics Short Wave Craft Wireless World About RF Cafe RF Cafe Homepage RF Cafe in Morse Code Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs Twitter LinkedIn Crosswords Engineering Humor Kirt's Cogitations Engineering Event Calendar RF Engineering Quizzes AN/MPN-14 Radar 5CCG Notable Quotes App Notes Calculators Education Magazines Software,T-Shirts,Coffee Mugs Articles - submitted by RF Cafe visitors Simulators Technical Writings RF Cafe Archives Test Notes Wireless System Designer RF Stencils for Visio Shapes for Word Search RF Cafe Sitemap Advertising Facebook RF Cafe Forums RF Cafe Homepage Thank you for visiting RF Cafe!

PCB Detector Circuit - RF Cafe Forums

The original RF Cafe Forums were shut down in late 2012 due to maintenance issues. Original posts:

Amateur Radio | Antennas | Circuits & Components | Systems | Test & Measurement

Post subject: PCB detector circuit
Unread postPosted: Mon Sep 06, 2004 5:47 am

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?


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.


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

RF Cafe Software

   Wireless System Designer - RF Cafe
Wireless System Designer

RF & EE Symbols Word
RF Stencils for Visio
Calculator Workbook
RF Workbench
Smith Chartâ„¢ for Visio
Smith Chartâ„¢ for Excel

About RF Cafe

Kirt Blattenberger - RF Cafe WebmasterCopyright
1996 - 2022
Kirt Blattenberger,

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website:

Try Using SEARCH
to Find What You Need. 
There are 1,000s of Pages Indexed on RF Cafe !