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Inductor Design and Analysis

Inductor lumped-element model

Mathcad routines for inductor design and analysisInductor Mathcad Software

1.  Circuit Sage's inductor analysis/synthesis tool: lfind.mcd.
2.  Download Mathcad Explorer Free,  A free viewier for Mathcad versions 8 and lower.  You can edit, but not save.
3.  Mathcad Tutorial, a good tutorial by Sidney Young and Theresa Julia Zielinski.
4.  Valery Ochkov's Book on Mathcad usage.
5.  Information on Mathcad from Mathsoft.
6. 
Mathcad routine for calculating on chip spiral inductance by Tom Weldon's group at UNCC. (tpwspiral.mcd)
7. DEA-CCAT: Finite-element software in Mathcad.

Inductor design and analysis tools Inductor Analysis Tools

1.   ASITIC, Ali Niknejad's free planar structure analysis tool.  Great for planar inductors, capacitors, and substrate coupling analysis.
2. 
SMIrC online inductance calculator, a good first pass inductance calculator
3.  Spiral model extraction (old version) in Excel from See Guan Huei.  Extracts lumped model from S-parameters. (New version : Excel Smith chart, SPICE outputs, and transformer-based model)
4.  AppCAD, A free tool, which has a spiral inductor designer, matching, and transmission line analysis.
5.  Jim Hawking's online toriod calculator.
6.  Spiral Inductor Simulation Program or SISP, a planar EM simulator, like ASITIC, but for Windows.  I think it is around $500-$1k. (Now Helic)
7.  Kansas State's spiral inductor simulator.
8.  FastHenry 3D inductance simulator.  Free.  Great for package modeling.
9.  GBPPR's air coil calculator.
10. UMR's online inductance calculator.
11. UW-Madison's inductance calculation software.  Free.
12.  OEA's spiral inductor design tool.
13. Inductwise, a free very fast passive circuit simulator.
14. QuickHenry, A free inductance/resistance extraction tool.

EM simulation softwareElectromagnetic Simulation Software

1.   Ansoft has a set of tools for various types of signal integrity and electromagnetic problems, including 3D simulation.  Ansoft's EM simulators , $42,000 for HFSS.
3.   IE3D from Zeland Software is an integral equation solution for electromagnetic simulation of circuit and antenna structures.
4.   EMSight is a Microsoft Windows-based Method-of-Moments 3D electromagnetic simulator for circuit interconnect problems.
5.   EMA3D is a 3D FD-TD electromagnetic simulator for radiation and scattering problems.
6.   Agilent/EESof offers Momentum, a planar electromagnetic simulator, and HFSS, a three-dimensional electromagnetic simulation tool.  EEsof's EM Simulators ,
7.   LINMIC+/N is a mostly electromagnetics-based Microwave and RF IC Design Suite from AC Microwave.
8.   xfdtd from Remcom is a 3D FD-TD electromagnetic simulator for radiation and scattering problems.
9.   Sonnet EM is a planar electromagnetic simulation tool. great for transmission lines, and it's free. Sonnet EM simulator,
10.   ToyBoxFDTD is an open source (GPL) 3D FD-TD electromagnetic simulator with PEC boundary conditions.
11.   Radar FDTD An enhanced version of ToyFDTD with PML boundary conditions.
12.  Integrated EM Simulation Software, software for EM simulation.
13.  QuickField, EM/Thermal/Stress Simulator.
13.   Zeland's Fidelity is a 3-D full wave electromagnetic simulation program for circuit and antenna applications.
14.   OEA's EM simulators ,
15.   Eagleware's EMPOWER.
16.   FEMLAB for Matlab: Finite Element Method.
17.   Apsim's EM Simulators.
18.   Faustcorp 's MEFiSTo 2D(free) and 3D EM Simulators.
19.   Applied Wave Research, Microwave Office
20.  Arpeggio , Full-wave EM simulator (free)
21.   Ansys's EM Software.
22.   Aplac's FDTD EM Simulator
.
23.   IFS Pro, from Interactive Products.  A good SPICE output from the simulator.
24.   Listing of EM Software.
25.   EM Routines and Codes, A good collection of RF software
26.   UMR's listing of EM software.  A thorough listing.  Their other pages are also good.
27.  Nice listing of free EM software on NASA website.
28.  WIPL-D, by Kolundzija et. al., $399.
29.  Westbay Tools, $470.
30.  EMPLAN, A planar EM analysis tool by Kinayman and Aksun, $659.

Tutorials and articles on inductor design and analysisTutorials and Information on Inductors

1.  NEC Research Index:  Lots of papers on inductors.  Extremely good.
2.  Magnetics Designer Transformer, Inductor and Choke Design Software
3.  How an inductor works.  A low-level physics-based discussion of inductors.
4.  Inductance nags, tools lag in 0.13-micron ICs, An EE Times article on the difficult task of inductance extraction from a layout.
5.  Self Inductance, Simple inductance expressions for 19 common structures.
6.  Steve Long's article on discrete RF inductor design.
7.  Patrick Yue's webpage with some information on inductors paper with S. Wong.
8.  A JSSC Paper by IBM on silicon spiral inductors.
9.  Integrated VCOs paper by TAMU.
10. ESSCIRC paper on on-chip spiral modeling.
11. Marc Thompson's simplified inductor calculations.
12. Ali Niknejad's paper on on-chip spiral modeling.
13. Air-coil inductance calculations.
14.  A good article on inductance calculation and modeling.
15. Nice MATLAB code for finding mutual and self inductance of arbitrary loops.
16. Hyungsuk Kim's good presentation on inductance extraction and other WISC inductance publications.
17. Modeling skin effect in inductors by Ken Kundert.
18. A few simple inductor equations by rfcafe.
19. Ali Niknejad's papers on inductor design.
20. 
Inductance Estimators , A good survey of some inductance simulation tools with cost and accuracy information.
21.  ESSCIRC Website: Many good papers on inductor design. Very useful.

22. MIT's Electromagnetics class and Advanced Electromagnetics class and Electromagnetics Applications class and Electricity and Magnetism class.

Websites with information on inductorsWebsites with Information on Inductors

1.  General EE website with some inductor links

Books on inductor design and analysis Books on Inductors and Electromagnetics

1. Lumped-Element RF Circuit Design, Inder Bahl. $100, 1580533094, Artech.
2.   Grover, Frederick W. Inductance Calculations (Working Formulas and Tables), The Instrumentation, Systems, and Automation Society; 1982, ISBN: 0876645570.  Highly referenced, but I've heard it is out of print.

3. Design and Simulation of Inductors, Niknejad, $110, 0792379861, Kluwer
4. Electromagnetics for Engineers, Paul, $108, 0471271802, Wiley.
5. Numerical Techniques in Electromagnetics, Sadiku, $110, CRC Press, 0849313953
6. Electromagnetics for Engineers, Steven E. Schwarz, 019511597X, Oxford
7.  Microwave Circuit Modeling Using Electromagnetic Field Simulation. Swanson, $125, 1580533086, Artech.
8. Integrated Passive Component Technology, Ulrich et al, $90, 0471244317, Wiley.
 

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