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Impedance Matching
Impedance matching is the lifeblood of RF circuit design.
Here is a detailed listing of resources available on the web
for your impedance matching needs. In addition we offer software
of varying levels of complexity to accelerate your design time.
 Impedance
Matching Tools
1. Circuit Sage's
highpass-L matching network:
a. highL.mcd,
highL.pdf, highL8.mcd:
A simple routine which synthesizes a highpass L matching
network given a complex source and load impedance.
b. completehighL.mcd,
(pdf version): A
complete Mathcad 2001i routine for the analysis and synthesis of highpass-L
matching networks. The equations used to synthesize
the highpass L matching network are discussed in depth.
Includes S-parameter and frequency responses.
2. Circuit Sage's lowpass-L matching network:
a. lowL.mcd,
lowL.pdf, lowL8.mcd:
A simple routine which synthesizes a lowpass L matching
network given a complex source and load impedance.
b. completelowL.mcd,
(pdf version): A
complete Mathcad 2001i routine for the analysis and synthesis of highpass-L
matching networks. The equations used to synthesize
the lowpass L matching network are discussed in depth.
Includes S-parameter and frequency responses.
3. Circuit Sage's general matching with Smith chart:
smith_chrt_matching.mcd,
(pdf version):
A Mathcad 2001i routine for graphical impedance matching with a Smith
chart, including inductors, transmission lines, resistors, and
capacitors.
4. Circuit Sage's matchall.mcd, (pdf
version) a collection of matching routines from Circuit Sage in Mathcad 2001i.
5.
Circuit Sage's transmatch.mcd
(and pdf), a Mathcad routine for impedance matching with
transmission lines.
6. match_rc.mcd: by
Roald C. Maximo. Calculates LC elements for a broadband
matching network for a load with a capacitice in parallel.
7. match_rl.mcd: by
Roal C. Maximo. Calculates LC elements for a broadband matching
network for a load with an inductance in series.
8.
Download
Mathcad Explorer Free, A free viewier for Mathcad
versions 8 and lower. You can edit, but not save.
9. Mathcad
Tutorial, a good tutorial by Sidney Young and Theresa Julia
Zielinski.
10. Valery Ochkov's Book on Mathcad
usage.
11. Information on Mathcad from Mathsoft.
12. Tapered
transmission line matching network design by Roger Norrod.
13. brdmatch.mcd: by
Roald C, Maximo. Calculates LC elements of a broad band
impedance transformation between resistive terminations.
14.
Ludwig Reinhold's very good microwave
notes and m-files. A good substitute for Besser's RFI course.
 Online
Tools
1. Stub
Matching, Winston Chan's stub-matching applet.
Interesting, but not very useful.
2. Matcher2:
Impedance matching tool. Mirror
at UCB.
3. An online
Smith chart tool from Agilent. Not very useful.
4. Agilent's online
impedance matching game. Interesting.
5. Jim Hawking's Pi
Network Calculator.
6. GBPPR's Pi
Network calculator. and S-parameter
utility.
7. Raltron's Pi
Network calculator.
8. Hao Shi's Smith
Chart applet.
9. A javascript impedance
matching tool (requires source/load S-parameters) by Nigel
Martin.
 Software
1. Motorola
Impedance Matching Program, by Dan Moline, App
Note 582.
2. AppCAD, A
free tool for RF circuit design including impedance matching.
3. Lance Lascari's LLSmith
smith chart tool.
4. Automated
Smith Chart, Artech House by Leonard Schwab. $381
5. ZMatch, $250 from
NuHertz. Try it free for 20 days!
6. match.xls, impedance matching
in Excel.
7. RFMatch, by Giorgio
Fontana, a free tool for impedance matching.
8. Artetronics, Matching
circuit design suite, $4,750. Too expensive for too
little.
9. WMatch,
an impedance matching program by Michael Hutt. Info
on Wmatch.
10. Stephan
Weber's Elekta,
$109, some simple PLL design capabilities, but a good tool overall.
11. LINC2,
$175-$495. Impedance matching tool. article.
12.
MultiMatch,
$1250, a matching tool with modules for oscillator and
power amplifier design.
13. Dr. Bingo's RF
Network Designer. Looks good for $49.
14. RFshop's matching
spreadsheet. Free.
15. Michael Ellis' LC
Matching Program. Free, but probably DOS.
16. TRLINE,
a nice free tool for transmission line matching.
17. EZ-Chart,
$150. 15 day trial version is free.
18.
Match2,
a free general impedance matching program by Jim
Tonne.
19. Puff, A
DOS Program from Caltech for S-parameter calculations. $10.
20. Thom Cuthbert's numerous BASIC programs for designing filters
and matching networks. $10.
21. Stubtune
and Stubmatch,
DOS routines to match antennas by
22.
Z-Match from
numberone systems. $300.
23. L_tuner,
A DOS routine to design L matching networks, and T_tuner
for T networks, and Pi_L_net
for Pi networks.
 Articles
1. A nice application note, AN95-1, by HP on S-Parameter
Techniques.
2. Maxim
Matching Article (July 2000, RF Design Magazine) ,
Discusses designing matching networks with a Smith chart.
3. Impedance Matching
Applied to PAs, A thorough practical discussion of
impedance matching from Motorola application note.
4. Ernie Kim's
ee194 class. A good
collection of notes on impedance
matching and microwave circuits.
5. David Leeson's
ee246 class. Some notes on impedance matching and
microwave circuits.
6. Transmission
lines and impedance matching, a tutorial by Giorgio Fontana.
7. Notes
(based on Pozar) on a microwave circuit design class.
8. AARL article on broadband
HF antenna matching.
9. Common impedance
matching mistakes article by Justin Magers.
 Smith
Chart
1. History of
Phil and Smith Chart, by Randy Rhea.
2. "Chart
Analysis Enhanced with Mathcad," and
SMITHchart3.mcd by Alan
Victor.
3. DaVinci,
Smith
Chart, and parameter conversion (S, Z, Y, G, H, ABCD): Free.
4. AARL
Smith Chart Notes, Good information on Smith chart basics.
5. High quality Smith chart
and color Smith chart for printing
7. smithchart.mcd: A
smith chart tool with Q and VSWR contours.
8. Smith charts with Mathcad: smithchrt.mcd.
9. Smith
Chart 3.0 , $210
10. SS-mag's smith chart collection
,
11. D. Jefferi's Smith
Chart Notes.
12. RF in a nutshell,
by Y. Kwon. Chapter 11.
13. A very nice S-Parameter
tutorial from HP.
14.
Pasan, and Quicksmith:
free smith chart impedance matching tools.
15. How
to use a Smith Chart, from Test and Measurement World.
16. Smith
Chart for Excel from rfcafe.
17. CSmith
from Stephan Weber, $25 shareware, looks very nice. (rfglobalnet version)
18. schart, A free old DOS
graphical impedance matching program.
19. rfmatch6, A free old
DOS routine for impedance matching by Giorgio Fontana. difficult to
use.
20. LCMatch,
A free simple L clean matching network calculator by RadioCom.
21. Smith Chart stencil
for Visio.
22. QuickSmith
from Nathan Iyer. Free (and it's really good).
23. Smith Chart for Palm OS
by John Forste.
24. Smith Chart tool
from elmag.com.
25. Great Smith
Chart article by TRW.
26. WinSMITH 2.0,
$79. Can be used for Matching. I think it's from
Eagleware.
27. Mr.
Smith, A nice free smith chart tool.
28.
PowerSmith, A PC Smith chart tool with an automatch feature.
By David Tomanek and Martin Kratoska.
29. smith.m, A MATLAB Smith chart
plotting tool by Robert Clark.
 Books
and Videos
1.
Q-Match:
Lumped-Element Impedance Matching Software by Pieter L.D. Abrie
2. Design of
Impedence-Match
Networks Peter L.D. Abrie.
3. RF Circuit Fundamentals: Volume
II
A Besser video course.
4. RF Circuit Fundamentals: Volume
I A Besser video course. and RF circuit Design: Passive
Circuits and Systems, A Besser book, $109, 1580535216, Artech.
5. RF
Circuit Design by Chris Bowick,
6. Microwave Filters, Impedance-Matching
Networks, and Coupling Structures, Matthaei
et. al., 1980
7. Introduction to the Smith Chart, video by Glen Parker. $99.
Noble.
8. Filters and Matching Networks, a video course by
Randall W. Rhea, $900. Noble.
9. Electronic Applications of the Smith Chart, by the
original Philip Smith, $59. 1884932398. Noble.
10. A Practical introduction
to impedance matching Thomas.
11. Microwave Filters, Couplers and
Matching Networks, Wenzel. $1200.
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