Homepage - RF Cafe
Webmaster: Kirt Blattenberger | KB3UON | Sitemap | ©1996-2014     Visit RF Cafe on
      Menu below is just a small sample of what is here!          Visit RF Cafe on Facebook Visit RF Cafe on Twitter Visit RF Cafe on LinkedIn
Custom Search
More than 10,000 searchable pages indexed.
•−•  ••−•    −•−•  •−  ••−•  •
RF Cafe Morse Code >Hear It<

Matching Network Designer for Excel

Mr. Manfred Kanther has graciously made his very fine Excel spreadsheet available for download by RF Cafe visitors. It is written in the Excel 2000 environment, so any version from 2000 up through Excel 2007 will support it. Click the screen image to the right to download the ZIP file.

For a final release version of Matching Network Designer, please visit Mr. Kanther's website.

If you did not know better, you would believe that this is actually a stand-alone application, and not a spreadsheet. All of the coding appears to be implemented in the VBA code. Depending on the level of macro security you have set in Excel, you might have to click the Enable Macro button as the spreadsheet loads.

Per Manfred:
Click here to download Manfred Kanther's Tuning Network Excel Spreadsheet (Smith Chart interface)

Main Screen Overview
(click image to download the file)

Manfred Kanther's Tuning Network Excel Spreadsheet, with Smith Chart Interface - Component Tuning
Component Tuning Section Detail
Smith Chart is an acknowledged trademark
of the Analog Instruments Company

"All yellow shaded fields are allowed for input data. The impact of component changes in placement and value can be directly explored on the chart and therefore be trimmed for perfect matching conditions. R's, C's, L's and T's (transmission line) can be configured. The worksheet can be duplicated so that you can work on different matching networks in parallel."

Mr. Kanther's e-mail is shown in the spreadsheet. Please be sure to thank him for making this available to you!

See the Example Below


From Manfred:

Let me demonstrate with the attached workbook, dedicated to TI/Chipcon's CC1100 output matching network, how capable the tool is ( or Excel ). Three worksheets are networked together to form the proposed matching network for the CC1100 at the frequency of 915MHz.






This is the proposed network ( Balun ) out of the CC1100 datasheet:



TI/Chipcon CC1100

This is the BOM:


TI/Chipcon CC1100 BOM

This is the output impedance of the N-Port and and the P-Port ( values taken at 915Mhz):

TI/Chipcon CC1100 Impedance


To analyse this network with the tool, three sheets are necessary. The first sheet represents half a Balun Bridge for the N-Output, named "Matching RF-Nout" The second sheet represents half a Balun Bridge for the P-Output, named "Matching RF-Pout" The third sheet "Antenna matching" combines the the Rp, Cp of the overall "Matching RF-Nout" circuit and Rp, LP of the overall "Matching RF-Pout" circuit plus the few components on the way to the antenna.

Some important notes need to be made:

1. The output impedance of the CC1100 ports is given in the datasheet by looking towards the antenna. In the sheets we are looking to the CC1100 outputs hence the conjugate complex of the given impedance must be used.

2. The capacitor of C121 of 1pF needs to be doubled in value if you connect them to ground on both Balun branches instead between of the branches.

3. The Rp, Cp and the Rp, Lp values in the third sheet "Antenna matching" are links backward to the respective sheets of "Matching RF-Nout" and "Matching RF-Pout". Don't overwrite it.

4. The frequency value of the sheets "Matching RF-Nout" and "Matching RF-Pout" is linked forward to the "Antenna matching" frequency input field.

All the links make it possible to change the components values and the overall impact can be observed in the "Antenna matching" sheet. Also the frequency variation of the whole circuit can be shown if you click on the "fo-Variation Yes/No" button on the "Antenna matching" sheet. ( It will take about 10+ seconds to calculate and display the curve ) But don't do that on the other both sheets, it will destroy the links of the frequency input and you need to establish them again ( that is no problem but you need to be aware of it ).

Screen Shots


Match for N Output
 

Match for P Output

Match for Antenna
(looking Back at N & P matches)
A Disruptive Web Presence

Custom Search
Over 10,000 pages indexed! (none duped or pirated)

Read About RF Cafe
Webmaster: Kirt Blattenberger
    KB3UON

RF Cafe Software

RF Cascade Workbook
RF Cascade Workbook is a very extensive system cascaded component Excel workbook that includes the standard Gain, NF, IP2, IP3, Psat calculations, input & output VSWR, noise BW, min/max tolerance, DC power cauculations, graphing of all RF parameters, and has a graphical block diagram tool. An extensive User's Guide is also included. - Only $35.
RF system analysis including
frequency conversion & filters

RF & EE Symbols Word
RF Stencils for Visio

Product & Service Directory
Personally Selected Manufacturers
RF Cafe T-Shirts & Mugs

RF Cafe Software

Calculator Workbook
RF Workbench
Smith Chart™ for Visio
Smith Chart™ for Excel
Your RF Cafe Progenitor & Webmaster
Click here to read about RF CafeKirt Blattenberger... single-handedly redefining what an
                                 engineering website should be.

View the YouTube RF Cafe Intro Video Carpe Diem! (Seize the Day!)

5CCG (5th MOB): My USAF radar shop

Airplanes and Rockets: My personal hobby website

Equine Kingdom: My daughter Sally's horse riding website