PathWave Design

From Wikipedia, the free encyclopedia
(Redirected from EEsof)
PathWave Design (formerly EEsof)
Company typeDivision
IndustryElectronic Design Automation Software
HeadquartersSanta Rosa, California,
United States
Area served
ProductsRF & Microwave Design
Design & Simulation of High Speed Digital
Electronic System-Level (ESL) Design
Device Modeling
WebsiteOfficial website Edit this at Wikidata

PathWave Design is a division of Keysight Technologies that was formerly called EEsof (/ˈsɒf/ EESOF; electronic engineering software).[1] It is a provider of electronic design automation (EDA) software that helps engineers design products such as cellular phones, wireless networks, radar, satellite communications systems, and high-speed digital wireline infrastructure. Applications include electronic system level (ESL), high-speed digital, RF-Mixed signal, device modeling, RF and Microwave design for commercial wireless, aerospace, and defense markets.


EEsof was founded in 1983 by an entrepreneur, Charles J. ("Chuck") Abronson, and a former Compact Software employee, Bill Childs.[2][3][4]

EEsof's first products included high-frequency circuit simulators such as Touchstone and Libra. Although the Touchstone simulator itself is obsolete,[5] its eponymous file format lives on. EEsof was acquired by Hewlett-Packard in 1993[6] and later spun out first as part of Agilent Technologies in 1999 and then as part of Keysight Technologies.

After the merger of HP and EEsof, the EEsof products were combined with the HP simulator, Microwave Design System (MDS). HP's entry, MDS, had been introduced in 1985.[citation needed] It was developed in-house and comprised a linear circuit simulator with integrated schematic capture and graphical layout with back-annotation, a first for RF EDA software. MDS was offered on UNIX workstations from HP, Sun, and Apollo as well on the PC. Before the introduction of MDS, HP had a marketing relationship with EEsof and sold Touchstone software on HP platforms such as the Series 200 (but not on the PC). The marketing relationship ended after the introduction of HP's MDS product.[citation needed]

The HP and EEsof harmonic balance simulators also had parallel lives before the merger. HP funded an employee Ken Kundert to do a Ph.D. at UC Berkeley. For his thesis, he developed Spectre, the first harmonic balance prototype. Some sources argue[who?] that since Berkeley had an open policy to all of its research work, EEsof was able to learn about the project and released a product, Libra, before HP was able to commercialize it in MDS. (Libra was a play on the Latin word libra for balance or scales). However, other sources say that Libra was developed completely independently.[7][8] In any case, Kundert left HP to join Cadence Design Systems shortly after receiving his Ph.D. There he developed Spectre and SpectreRF.

In 1997, HP acquired Optimization Systems Associates (OSA), founded by John Bandler in 1983.[9] OSA thereby became part of HP EEsof. OSA’s products included HarPE and OSA90/hope, featuring the world’s then most powerful harmonic balance optimizer, as well as Empipe, Empipe3D, EmpipeExpress, and empath. OSA's optimization technology and the OSA's Empipe family became the foundation of HFSS Designer and Momentum Optimization. This integration into HP’s electromagnetic product line consolidated a paradigm shift in HP's offering of their tools—a shift from analysis to design. Longer-term plans of the acquisition included leveraging OSA technology across HP's circuit- and device-simulation product lines.

On January 7, 2014, Agilent announced a plan to spin off its electronic measurement divisions, including EEsof, as a separate company, Keysight Technologies.[10]

In 2019, Keysight started to phase out the EEsof brand in favor of their new PathWave Design branded TestOps toolchain,[1] although the old brand is still used in some places.[11]


  • Platforms:
    • PathWave Advanced Design System (formerly EEsof ADS) – RF, microwave and high speed digital EDA software for wireless communications and networking, aerospace and defense, and signal integrity applications
    • PathWave EM Design (formerly EEsof EMPro or Electromagnetic Professional) - 3D EM platform that integrates 3D EM simulation and circuit simulation[12]
    • PathWave RF Synthesis (formerly EEsof/Eagleware Genesys) - RF and microwave design for circuit board and subsystem designers[13]
    • PathWave System Design (formerly EEsof/Eagleware/Elanix SystemVue) - Electronic system-level design tool for system architects and algorithm developers to change the physical layer (PHY) of wireless and aerospace/defense communications systems[14]
    • PathWave RFIC Design (formerly EEsof GoldenGate and RF Design Environment) - RFIC/RF mixed-signal simulator[15]
    • PathWave Device Modeling (formerly EEsof Integrated Circuit Characterization and Analysis Program (IC-CAP)), PathWave Model Builder (formerly MBP), PathWave Model QA (MQA), PathWave WaferPro - Device modeling, characterization, and validation[16]
  • EM solvers:
    • Momentum – 3D planar EM simulator that uses frequency domain Method of Moments (MoM) technology. Available with the PathWave ADS, RF Synthesis, and RFIC Design platforms.
    • FEM Element (formerly Electromagnetic Design System) – full-wave 3D simulator, frequency domain. Available with the PathWave ADS and EM Design platforms.
    • FDTD Element – full 3D, time-domain simulator to analyze 3D structures. Available with the PathWave EM Design platform.

Mergers and acquisitions[edit]

The GoldenGate product was added with the Xpedion acquisition. The SystemVue and Genesys products were added as a result of the acquisition of Eagleware-Elanix in 2005.,[17][18] In turn, Eagleware-Elanix was a result of the merger of Eagleware and Elanix.[19] Eagleware itself was founded in 1985 by Randy Rhea.[20] The MBP and MQA platforms were added with EEsof's acquisition of Accelicon Technologies.[21]

See also[edit]


  1. ^ a b "PathWave Design Software". PathWave Design Software | Keysight Technologies. Retrieved 2019-04-24.
  2. ^ Charles J. Abronson bio at CAP Wireless Archived 2008-01-15 at the Wayback Machine
  3. ^ "History of EEsof at Microwaves 101". Archived from the original on 2008-02-08. Retrieved 2008-01-28.
  4. ^ "History of Compact at Microwaves 101". Archived from the original on 2008-02-08. Retrieved 2008-01-28.
  5. ^ It was replaced by E8881 ADS Linear Simulator, which was later incorporated into W2200 ADS Core
  6. ^ "Hewlett-Packard to acquire EEsof", Mobile Phone News, Sept 13, 1993
  7. ^ Russ Henke. "Agilent EEsof EDA – Part I".
  8. ^ Russ Henke. "Agilent EEsof EDA – Part II".
  9. ^ "HP Acquires Optimization Systems Associates, Expands CAE Software Portfolio". Archived from the original on 2017-01-26. Retrieved 2016-09-15.
  10. ^ "Agilent Technologies Reveals Name of Electronic Measurement Spin-Off Company: Keysight Technologies Reflects Ability to Unlock Measurement Insights for Engineers" (Press release). January 7, 2014.
  11. ^ "Keysight EEsof EDA". YouTube. Retrieved 2019-05-10.
  12. ^ Keysight EEsof EDA EMPro page
  13. ^ Keysight EEsof Genesys page
  14. ^ Keysight EEsof EDA SystemVue page
  15. ^ Keysight EEsof EDA Goldengate page
  16. ^ Keysight EEsof EDA IC-CAP page
  17. ^ "Agilent Technologies completes acquisition of Eagleware-Elanix"
  18. ^ "Microwave Journal Speaks with Todd Cutler, Senior Manager, Agilent EEsof EDA" Archived 2011-07-14 at the Wayback Machine
  19. ^ "Interview with Todd Cutler, CEO Eagleware-Elanix," by Jack Horgan, EDA Cafe
  20. ^ History of CIRCUIT BUSTERS, Star, SUPERSTAR, and Eagleware Archived 2008-02-08 at the Wayback Machine at Microwaves 101
  21. ^ "Agilent Technologies Completes Acquisition of Accelicon Technologies' Solutions for Semiconductor Device Modeling". Agilent Technologies. Feb 21, 2012. Retrieved June 25, 2012.