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Sonnet Lite™ is a free feature-limited version of Sonnet's professional Sonnet Suites, which provides EM analysis to thousands of companies across the globe. Many major manufacturers of high-frequency components and boards depend on Sonnet to analyze their predominantly planar high-frequency designs from 1 MHz through several THz.

You can also use Sonnet Lite to analyze planar structures such as:

Microstrip matching networks
Lossy spiral inductors with bridges
Via (inter-layer or grounded)
Coupled transmission line analysis
Microwave circuit discontinuities
Broadside-coupled transmission lines
Planar interconnects
Microstrip or stripline filters
MIM capacitors
Mounting pad characterization
PCB trace crosstalk analysis
Planar couplers/splitters
Package resonances
Any arbitrarily shaped metal pattern!

Key Benefits of Sonnet Lite:

Most accurate, reliable planar EM software in the world
Now with 32 MB of memory
View any Sonnet v15 or earlier project
Easy to learn with clear tutorials and online help
Fast and efficient
It's free!
Low-cost upgrades available - starting at (US$)495
Free integration with AWR Microwave Office version 11 or earlier
Free integration with Keysight ADS