PathWave Design

PathWave Design is the electronic design automation division and software brand of Keysight Technologies. Its roots lie in EEsof, an electronic engineering software company founded in 1983 by entrepreneur Charles J. Abronson and former Compact Software employee Bill Childs. EEsof developed early high-frequency circuit-simulation products, including Touchstone and Libra, and became associated with the design and analysis of RF and microwave systems. Over time, its software portfolio expanded from circuit simulation into electromagnetic analysis, optimization, device modeling, RF integrated-circuit design, and electronic-system-level development. The business changed corporate ownership several times. Hewlett-Packard acquired EEsof in 1993. Following HP's separation of its electronic-measurement activities, the business became part of Agilent Technologies in 1999 and subsequently entered Keysight Technologies when Agilent announced the planned separation of its electronic-measurement operations in 2014. The product family also absorbed capabilities from other acquisitions and combinations. Hewlett-Packard's 1997 acquisition of Optimization Systems Associates added optimization and electromagnetic technologies. Eagleware-Elanix products, obtained through the 2005 acquisition of Eagleware-Elanix, contributed the Genesys and SystemVue product lines. Accelicon Technologies' MBP and MQA products added device-modeling and model-quality capabilities, while the acquisition of Xpedion contributed GoldenGate technology. In 2019, Keysight began phasing out the EEsof name in favor of PathWave branding. PathWave Design subsequently became the umbrella identity for a collection of tools used across the engineering workflow. Its principal platforms include PathWave Advanced Design System, PathWave EM Design, PathWave RF Synthesis, PathWave System Design, PathWave RFIC Design, and several device-modeling and model-validation products. The portfolio also contains electromagnetic solvers such as Momentum, FEM Element, and FDTD Element. The division's software is aimed at engineers and system architects designing products and infrastructure that depend on demanding RF, microwave, mixed-signal, and high-speed behavior. Applications described for the portfolio include cellular phones, wireless networks, radar, satellite communications, aerospace and defense systems, and high-speed digital wireline infrastructure. Depending on the product, users can model semiconductor devices, synthesize RF networks, simulate integrated circuits, analyze electromagnetic structures, develop communications algorithms, or connect system-level and circuit-level design processes. PathWave Design is not presented as an independently listed company. It operates within Keysight's broader test-and-measurement and engineering-software organization. Public reference material identifies the brand and its predecessor portfolio, but does not provide a separate headquarters, standalone financial reporting, current executive roster, or independent operating statistics for PathWave Design.

PathWave Design traces its history to EEsof, an electronic engineering software company established in 1983 by Charles J. Abronson and Bill Childs. The company entered the market with high-frequency circuit simulators, notably Touchstone and Libra. These products addressed the specialized needs of engineers working on microwave and RF circuits, where frequency-dependent behavior, nonlinear effects, and network interactions are central to the design process. Although the original Touchstone simulator is obsolete, the Touchstone file format continued to be used as a representation for network and simulation data. EEsof's early development took place alongside Hewlett-Packard's growing interest in RF electronic design automation. Before Hewlett-Packard acquired EEsof, the two companies had a marketing relationship under which Touchstone was sold for some HP platforms. Hewlett-Packard later introduced its own Microwave Design System, or MDS, in 1985. MDS combined a linear circuit simulator with schematic capture, graphical layout, and back-annotation, and was offered on HP, Sun, and Apollo UNIX workstations as well as personal computers. After HP introduced MDS, the earlier marketing relationship with EEsof ended. Hewlett-Packard acquired EEsof in 1993. The two organizations' product lines were subsequently combined, including the integration of EEsof technologies with MDS. Their histories also intersected in the development of harmonic-balance simulation. HP supported research by Ken Kundert at the University of California, Berkeley, where work led to the Spectre harmonic-balance prototype. Reference accounts differ over the extent to which EEsof's Libra development was connected to that work: some describe knowledge transfer from the Berkeley project, while others characterize Libra as an independent development. Kundert later joined Cadence Design Systems, where he developed Spectre and SpectreRF. The HP EEsof portfolio expanded through acquisitions. In 1997, HP acquired Optimization Systems Associates, founded by John Bandler in 1983. OSA brought products such as HarPE, OSA90/hope, Empipe, Empipe3D, EmpipeExpress, and empath. Its optimization and electromagnetic technologies later supported products including HFSS Designer and Momentum Optimization, helping shift the portfolio from analysis alone toward broader design and optimization workflows. In 1999, EEsof became part of Agilent Technologies when Agilent was separated from Hewlett-Packard's parent organization. Agilent continued to develop and sell the electronic design automation portfolio. Other important technologies entered the portfolio through later transactions. Eagleware and Elanix combined before Eagleware-Elanix was acquired in 2005; their products supplied the Genesys and SystemVue lines. The Xpedion acquisition contributed GoldenGate, which became part of the RF integrated-circuit design offering. EEsof's acquisition of Accelicon Technologies added MBP and MQA, extending the device-modeling and model-quality portion of the business. On January 7, 2014, Agilent announced plans to spin off its electronic-measurement divisions as a separate company. That separation created Keysight Technologies, with EEsof among the businesses that moved into the new organization. Keysight later reorganized the portfolio under the PathWave identity. Beginning in 2019, the company started to phase out the EEsof name in favor of PathWave branding, and PathWave Design became the umbrella designation for the EDA products. Under PathWave Design, the portfolio covers multiple levels of the engineering process. Advanced Design System addresses RF, microwave, and high-speed digital design. EM Design provides three-dimensional electromagnetic analysis connected with circuit simulation. RF Synthesis supports RF and microwave circuit-board and subsystem development, while System Design serves electronic-system architects and algorithm developers working on communications and aerospace or defense systems. RFIC Design addresses RF integrated-circuit and mixed-signal simulation. Device-modeling products support characterization, extraction, validation, and quality assurance. Electromagnetic solvers such as Momentum, FEM Element, and FDTD Element extend the portfolio across planar, frequency-domain, and time-domain analysis. The brand therefore represents the continuation and reorganization of a long-running EDA business within Keysight rather than a separately incorporated company.

• 2019

  PathWave branding begins replacing EEsof

  [1]PathWave Designen.wikipedia.org

  Keysight began transitioning the legacy EEsof portfolio to the PathWave brand, including PathWave Design.

• 2014

  Keysight separation is announced

  [1]PathWave Designen.wikipedia.org

  Agilent announced the planned separation of its electronic-measurement businesses, including EEsof, into Keysight Technologies.

• 2005

  Eagleware-Elanix products enter the portfolio

  [1]PathWave Designen.wikipedia.org

  The acquisition of Eagleware-Elanix added the Genesys and SystemVue product families.

• 1999

  EEsof becomes part of Agilent Technologies

  [1]PathWave Designen.wikipedia.org

  Following the HP separation, EEsof became part of Agilent Technologies.

• 1997

  Optimization Systems Associates joins HP EEsof

  [1]PathWave Designen.wikipedia.org

  HP acquired Optimization Systems Associates, adding optimization and electromagnetic technologies to the EEsof portfolio.

• 1993

  Hewlett-Packard acquires EEsof

  [1]PathWave Designen.wikipedia.org

  EEsof was acquired by Hewlett-Packard and its products were subsequently combined with HP's MDS simulator.

• 1985

  Hewlett-Packard introduces Microwave Design System

  [1]PathWave Designen.wikipedia.org

  Hewlett-Packard introduced MDS, an RF design system that later became part of the product history combined with EEsof technology.

• 1983

  EEsof is founded

  [1]PathWave Designen.wikipedia.org

  Charles J. Abronson and Bill Childs founded EEsof, the predecessor business of PathWave Design.

A professional engineering-software portfolio for design, simulation, modeling, optimization, and verification of RF, microwave, electromagnetic, mixed-signal, high-speed digital, and communications systems.

• RF, microwave, and high-speed digital EDA

  PathWave Advanced Design System

  The successor-branded version of EEsof Advanced Design System. It supports RF and microwave design, wireless communications and networking, aerospace and defense applications, and high-speed digital signal-integrity work.

• Electromagnetic simulation

  PathWave EM Design

  A three-dimensional electromagnetic design environment, formerly associated with EMPro, intended to connect electromagnetic simulation with circuit-level analysis for complex electronic structures.

• RF and microwave synthesis

  PathWave RF Synthesis

  The PathWave successor to the EEsof and Eagleware Genesys line. It is aimed at engineers designing RF and microwave circuits, circuit boards, and subsystems.

• Electronic-system-level design

  PathWave System Design

  The successor to the SystemVue product line. It serves system architects and algorithm developers who need to develop and evaluate physical-layer designs for wireless, aerospace, and defense communications.

• RFIC and mixed-signal simulation

  PathWave RFIC Design

  A portfolio formerly associated with GoldenGate and RF Design Environment. It is used for RF integrated-circuit and RF mixed-signal simulation and design analysis.

• Semiconductor device modeling

  PathWave Device Modeling

  A device-modeling and characterization family descended from tools including IC-CAP. It supports the creation, characterization, and validation of models used in semiconductor and circuit design.

• Model extraction and quality assurance

  PathWave Model Builder and PathWave Model QA

  Formerly associated with MBP and MQA, these tools address model development and model-quality checking within semiconductor design workflows.

• Wafer and device characterization

  PathWave WaferPro

  A device and wafer-characterization offering within the PathWave Design modeling portfolio.

• Planar electromagnetic simulation

  Momentum

  A planar electromagnetic simulator based on frequency-domain Method of Moments technology. It is available with PathWave ADS, RF Synthesis, and RFIC Design environments.

• Three-dimensional electromagnetic simulation

  FEM Element

  A full-wave, frequency-domain three-dimensional electromagnetic solver available through PathWave ADS and PathWave EM Design.

• Time-domain electromagnetic simulation

  FDTD Element

  A full three-dimensional, time-domain solver for analyzing electromagnetic behavior in three-dimensional structures through the PathWave EM Design environment.

• 2019

  Rebrand the EEsof portfolio as PathWave DesignStrategy

  Background

  Keysight began consolidating parts of its software portfolio under the PathWave identity.

  Action taken

  The company started phasing out EEsof branding in favor of PathWave Design and related PathWave product names.

  Aftermath

  Legacy EEsof products continued to be referenced in some contexts while the newer PathWave names became the principal branding.

  Source

• 2014

  Transfer the EEsof business into Keysight TechnologiesStrategy

  Background

  Agilent planned to separate its electronic-measurement divisions, including EEsof, from the remaining company.

  Action taken

  The electronic-measurement operations were organized as Keysight Technologies, where the EEsof business continued.

  Aftermath

  The business became part of Keysight's subsequent electronic design automation portfolio.

  Source

• 2019

  Keysight begins transition from EEsof to PathWave Design branding[1]PathWave Designen.wikipedia.org

  Product generation

  Keysight began phasing out the EEsof name in favor of PathWave branding, including the PathWave Design identity for the electronic design automation portfolio.

• 2014

  Agilent announces planned separation of electronic-measurement businesses[1]PathWave Designen.wikipedia.org

  M&A

  Agilent Technologies announced a plan to separate its electronic-measurement divisions, including the EEsof software business, into a new company that became Keysight Technologies.

1. 1PathWave Designen.wikipedia.org