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Selected Links
This page contains all of the links that we have referred to on our website.
A one page article on calculating effective dielectric constant by Dr Eric Bogatin of Gigatest Labs can be found on his website, but it is only possible to view the article by registering and logging on. Uses a TDR and imperial measurements.
A full page listing transmission line calculator links.
http://www.circuitsage.com/tline.html
Probably the best known supplier of components and now they sell useful RF ferrites.
IPC give many standards and formulas on their website.
Rick Hartley gives lots of useful formulas, and we have used two of them for our Microstrip calculators.
http://www.jlab.org/accel/eecad/pdf/050rfdesign.pdf
Four pages of formulas and data for RF/Microwave engineers.
http://www.kathrein-scala.com/tech_bulletins/EngRef.pdf
Detailed article on hybrid transformers used as 'directional couplers'.
http://www.members.tripod.com/michaelgellis/direct.html
Data sheet for the Philips BFS17 transistor.
http://www.nxp.com/acrobat_download/datasheets/BFS17_2.pdf
The engineers at Polar have done extensive measurements and calculations on PCB tracks. They have studied many types of transmission line including ones where the tracks are on layers embedded within the PCB, such as Coplanar Coupled Centered Tracks, Stripline Centered Track and Embedded Microstrip. Reliable data but you may have to pay for using the calculators.
http://www.polarinstruments.com/support/cits/IPC1999.pdf
There is a large collection of links from this RF Cafe page to a wide variety of calculators.
http://rfcafe.com/references/calculator_links.htm
Data sheet of the Sirenza SGA-7489 amplifier.
http://www.sirenza.com/products_detail.asp?model=SGA-7489&line=Gain%20Block&menu=amplifier
Lots of formulas from Tom Penick in eight pages. Covering rms, Op Amps, LC and RLC circuits, sinusoidal analysis, power and three phase power.
http://www.teicontrols.com/notes/CircuitTheoryEE411/CircuitTheory.pdf