Resources

Patents

Focus’ main disruptive advantage is Innovation

Starting in 2000 Focus now owns 175 patents and has another 35 patents pending, all on various tuner types and associated calibration, tuning and measurement applications.

patents

In the process Focus has invented all new tuner types, beyond the traditional single probe wideband impedance slide screw tuner known since 1985.

PRODUCT FAMILY:

  1. TRANSISTOR TEST FIXTURES:
    6,414,563 | 10,001,521 | 10,184,972 | 10,591,511 | 10,591,530 | 10,591,571 | 10,725,092 | 11,029,351.
  2. WIDEBAND SINGLE FREQUENCY TUNERS (COAX-WAVEGUIDE-THZ) & TUNING PROBES:
    7,034,629 | 7,053,628 | 8,203,348 | 8,358,186 | 8,410,862 | 8,427,255 | 8,461,946 | 8,466,758 | 8,854,162 | 8,975,988 | 9,252,738 | 9,257,963 | 9,325,290 | 9,602,072 | 9,666,928 | 9,716,303 | 9,716,483 | 9,722,569 | 9,866,203 | RE46,703 | 10,637,122 | 10,686,239 | 10,693,208 | 10,700,402 | 10,804,872 | 10,971,791 | 11,002,762 | 11,095,013 | 11,156,656 | 11,329,354 | 11,402,424 | 11,428,771 | 11,460,530 | 11,462,809 | 11,581,623 | 11,616,281 | 11,621,468 | 11,662,364 | 11,688,919 | 11,728,788 | 11,733,280 | 11,742,833 | 11,879,920 | 11,879,921 | 12,111,347.
  3. PRE-MATCH, HARMONIC, COMBO TUNERS:
    6,297,649 | 6,674,293 | 6,850,076 | 7,135,941 | 7,248,866 | 7,449,893 | 7,561,004 | 8,188,816 | 8,212,628 |  8,362,787 | 8,400,238 | 8,405,475 | 8,497,745 | 8,629,742 | 9,041,498 | RE45,667 | 9,276,551 | 9,431,999 | 9,620,842 | 9,899,984 | 10,097,165 | 10,345,422 | 10,429,484 | 11,119,136 | 11,327,101.
  4. CALIBRATION-TUNING METHODS:
    8,497,689 | 8,896,401 | 9,267,977 | 9,310,410 | 9,625,556 | 9,838,986 | 9,857,410 | 9,921,253 | 10,006,951 | 10,281,510 | 10,451,702 | 10,884,046 | 10,938,490 | 11,006,288 | 11,158,921 | 11,480,610 | 11,519,994 | 11,604,224.
  5. ADAPTERS/CALKITS:
    8,933,707 | 9,322,843 | 9,335,345 | 9,553,376 | 9,653,332 | 10,637,179 | 11,137,470.
  6. ACTIVE/HYBRID:
    9,213,056 | 9,331,670 | 9,459,336 | 9,664,718 | 10,103,713 | 10,168,362 | 10,177,429 | 10,187,228 | 10,317,445 | 10,345,370 | 10,348,273 | 10,444,266 | 10,520,541 | 10,725,094 | 11,038,249 | 11,041,882 | 11,092,619 | 11,137,430 | 11,137,439 | 11,193,966 | 11,217,870 | 11,391,770 | 11,863,148 | 11,863,163 | 12,052,008.
  7. INTEGRATION & TUNERS FOR INTEGRATION:
    6,998,836 | 7,102,457 | 10,693,437 | 11,125,777 | 11,480,589 | 11,506,708 | 11,598,790 | 11,867,736.
  8. LOW FREQUENCY TUNERS (PASSIVE & ACTIVE):
    7,646,267 | 7,646,268 | 8,212,629 | 8,405,466 | 8,912,861 | 9,344,061 | 9,647,629 | 9,893,717 | 10,290,428 | 10,756,694 | 11,716,068 | 12,155,364.
  9. DIRECTIONAL COUPLERS & INTEGRATION:
    8,405,405 | 8,841,921 | 10,734,697 | 11,196,139 | 11,233,307 | 11,821,930 | 12,051,844.
  10. DIVERSE–WAFER PROBES, AM/PM CONTROLLERS, HARMONICATTENUATORS…:
    9,112,250 | 9,252,471 | 9,835,652 | 9,897,637 | 9,960,472 | 10,177,428 | 10,276,910 | 11,816,416.
  11. NOISE:
    8,786,293 | 9,366,710 | 9,541,592 | 10,429,426 | 11,119,140.
Issued Pending Provisional

Issued

High Directivity Signal Coupler

Patent: 11,821,930 Date: 21/11/2023

Experimental Verification and Optimization of Two-Stage Amplifier

Patent: 11,816,416 Date: 14/11/2023

Temperature Controlled High Power Tuner

Patent: 11,742,833 Date: 29/08/2023

Load Pull System Using Two-Probe Waveguide Tuner

Patent: 11,733,280 Date: 22/08/2023

Very Low Frequency Impedance Tuner

Patent: 11,716,068 Date: 01/08/2023

Low Profile Millimeterwave Load Pull Tuner

Patent: 11,688,919 Date: 27/06/2023

Integrated Waveguide Tuner

Patent: 11,662,364 Date: 30/05/2023

Combination Probes for Load Pull Tuner

Patent: 11,621,468 Date: 04/04/2023

Two Probe Waveguide Tuner

Patent: 111,616,281 Date: 28/03/2023

High Speed Calibration for Impedance Tuner

Patent: 11,604,224 Date: 14/03/2023

Hermetic Load and Source Pull Wafer Probe Station

Patent: 11,598,790 Date: 07/03/2023

Anti-Skewing Load Pull Tuner with Rotating Probe

Patent: 11,581,623 Date: 14/02/2023

Calibration Method for Slide Screw Impedance Tuners

Patent: 11,519,994 Date: 06/12/2022

On-Wafer Tuner System and Method

Patent: 11,506,708 Date: 22/11/2022

Wafer Probe Integration with Load Pull Tuner

Patent: 11,480,589 Date: 25/10/2022

Load Pull Pattern Generation

Patent: 111,480,610 Date: 25/10/2022

Slide Screw Tuner with Adjustable Pitch

Patent: 11,460,530 Date: 04/10/2022

High-Speed High-Resolution Slide Screw Tuner

Patent: 11,462,809 Date: 04/10/2022

Low Profile High Speed Load Pull Tuner System

Patent: 11,428,771 Date: 30/08/2022

Low Profile Slide Screw Tuners and Method

Patent: 11,402,424 Date: 02/08/2022

Heterodyne Active Electronic Load Pull Tuner

Patent: 11,391,770 Date: 18/07/2022

Integrated Pre-Matching Module for Impedance Tuner

Patent: 11,327,101 Date: 10/05/2022

Anti-Skewing Impedance Tuner

Patent: 11,329,354 Date: 10/05/2022

Directional Wire Coupler for Waveguide Tuners and Method

Patent: 11,233,307 Date: 25/01/2022

Digital Load Pull Tuner

Patent: 11,217,870 Date: 04/01/2022

Low Frequency Active Load Pull Tuner

Patent: 11,193,966 Date: 07/12/2021

Simple Directional Coupler

Patent: 11,196,139 Date: 07/12/2021

Waveguide Slide Screw Tuner with Rotating Disc Probes

Patent: 11,156,626 Date: 26/10/2021

Fast Impedance Tuner Calibration

Patent: 11,158,921 Date: 26/10/2021

Active Load Pull Tuning System for Modulated Signal

Patent: 11,137,430 Date: 05/10/2021

High Speed Hybrid Load and Source Pull System

Patent: 11,137,439 Date: 05/10/2021

A Coaxial TRL Calibration Kit Adapter

Patent: 11,137,470 Date: 05/10/2021

Shielded RF and Thermal Connection for On-Wafer Load Pull

Patent: 11,125,777 Date: 21/09/2021

Multi-Octave Hybrid Harmonic Load Pull Tuner

Patent: 11,119,136 Date: 14/09/2021

Impedance Pattern Generation for Noise Parameter Measurement System

Patent: 11,119,140 Date: 14/09/2021

Active Harmonic Load Pull Impedance Tuner

Patent: 11,092,619 Date: 17/08/2021

Integrated Tera-Hertz Slide Screw Tuner

Patent: 11,095,013 Date: 17/08/2021

Active Harmonic Load Pull Impedance Tuner

Patent: 11,041,882 Date: 22/06/2021

Harmonic Hybrid Electronic Load Pull Tuner

Patent: 11,038,249 Date: 15/06/2021

Transforming Load Pull Test Fixture for Wave Measurements

Patent: 11,029,351 Date: 08/06/2021

Millimeterwave Tuners with External Airline

Patent: 11,002,762 Date: 11/05/2021

Method for Experimental Verification of RF Matching Networks

Patent: 11,006,288 Date: 11/05/2021

Transmission Line for High Power Tuners

Patent: 10,971,791 Date: 06/04/2021

Calibration Method for Coupler-Tuner Assembly

Patent: 10,938,490 Date: 02/03/2021

Calibration and Load Pull Method for RF and Baseband Frequencies

Patent: 10,884,046 Date: 05/01/2021

Liquid cooled High Power Impedance Tuner

Patent: 10,804,872 Date: 13/10/2020

MHz Range Harmonic Impedance Tuner and Method

Patent: 10,756,694 Date: 25/08/2020

Coaxial Adjustable Wave Probe

Patent: 10,734,697 Date: 04/08/2020

Pre-Matched Coaxial Transistor Test Fixture

Patent: 10,725,092 Date: 28/07/2020

Active Electronic Tuner

Patent: 10,725,094 Date: 28/07/2020

Compact Millimeter-Wave Tuner

Patent: 10,700,402 Date: 30/06/2020

High Gamma Disc-Tuning Probes for Impedance Tuners

Patent: 10,693,208 Date: 23/06/2020

High Gamma On-Wafer Load Pull Test System

Patent: 10,693,437 Date: 23/06/2020

Slide Screw Tuners with Offset Probes and Method

Patent: 10,686,239 Date: 16/06/2020

A Hermetic RF Connection for On-Wafer Operation

Patent: 10,637,122 Date: 28/04/2020

Slide Screw Tuners with Offset Tuning Probes and Method

Patent: 10,637,179 Date: 28/04/2020

Frequency Adjustable Pre-Matching Coaxial Transistor Test Fixture

Patent: 10,591,511 Date: 17/03/2020

Coplanar Load Pull Test Fixture for Wave Measurements

Patent: 10,591,530 Date: 17/03/2020

Adjustable Pre-Matching Coaxial Transistor Test Fixture

Patent: 10,591,571 Date: 17/03/2020

Hybrid Electronic Tuner

Patent: 10520541 Date: 31/02/2019

Hybrid Split Signal Load Pull System with Wave-Probe

Patent: 10444266 Date: 25/10/2019

Calibration Method for High Gamma Combo Tuner

Patent: 10,451,702 Date: 22/10/2019

Setup and Method for Noise Parameter Measurement

Patent: 10,429,426 Date: 01/10/2019

Compact Harmonic Tuner System with Rotating Probes

Patent: 10,429,484 Date: 01/10/2019

Hybrid Harmonic Tuner

Patent: 10,345,370 Date: 07/09/2019

Compact Harmonic Tuner System with Rotating Probes

Patent: 10,345,422 Date: 07/09/2019

Hybrid Digital Electronic Tuner

Patent: 10,348,273 Date: 07/09/2019

High Gamma Electronic Tuner

Patent: 10,317,445 Date: 17/06/2019

High Power Low Frequency Tuners

Patent: 10,290,428 Date: 14/05/2019

Load Pull Method for Transistors Driven by Modulated Signal

Patent: 10,281,510 Date: 07/05/2019

Programmable Harmonic Amplitude and Phase Controller

Patent: 10,276,910 Date: 30/04/2019

Hybrid Electronic Tuner

Patent: 10,520,541 Date: 03/03/2019

Integrated Split Signal Hybrid Harmonic Tune

Patent: 10,187,228 Date: 22/01/2019

Transistor Test Fixture with Convex Surface

Patent: 10,184,972 Date: 22/01/2019

Compact Harmonic Amplitude and Phase Controller

Patent: 10,177,428 Date: 08/01/2019

Hybrid Harmonic Impedance Tuner

Patent: 10,177,429 Date: 08/01/2019

Active Slide Screw Tuner

Patent: 10,168,362 Date: 01/01/2019

Hybrid Electro-Mechanical Tuner

Patent: 10,103,713 Date: 16/10/2018

High Gamma Compact Harmonic Tuner

Patent: 10,097,165 Date: 09/10/2018

Stable Load Pull Operation Using Tuners

Patent: 10,006,951 Date: 26/06/2018

Transistor Test Fixture with Integrated Couplers and Method

Patent: 10,001,521 Date: 19/06/2018

Programmable Amplitude and Phase Controller

Patent: 9,960,472 Date: 01/05/2018

Method for Reducing Power Requirements in Active Load Pull System

Patent: 9,921,253 Date: 20/03/2018

High Frequency Phase Reference Standard Signal

Patent: 9,897,637 Date: 20/02/2018

Compact Multi-Carriage Impedance Tuner and Method

Patent: 9,899,984 Date: 20/02/2018

Multi-band Low Frequency Impedance Tuner

Patent: 9,893,717 Date: 13/02/2018

High Frequency High Reflection Pre-Matching Tuners with Variable Zero Initialization

Patent: RE46703 Date: 06/02/2018

High Reliability Power Tuners

Patent: 9,866,203 Date: 09/01/2018

Tuning Method for Hybrid Active Injection Load Pull System

Patent: 9,857,410 Date: 02/01/2018

Multi-Frequency Attenuation and Phase Shifters

Patent: 9,835,652 Date: 05/12/2017

Calibration of High Frequency Signal Measurement Systems

Patent: 9,838,986 Date: 05/12/2017

Multi-band Low Frequency Impedance Tuner

Patent: 9,722,569 Date: 01/08/2017

Low Cost Probes for Slide Screw Tuners

Patent: 9,716,303 Date: 25/07/2017

Wideband Slide Screw Impedance Tuner

Patent: 9,716,483 Date: 25/07/2017

High Speed Hybrid Active Load Pull

Patent: 9,664,718 Date: 30/05/2017

High Power Slide Screw Tuners

Patent: 9,666,928 Date: 30/05/2017

Wafer Probe Holder for Planarity and Orientation Adjustment

Patent: 9,653,332 Date: 16/05/2017

Variable Capacitors for High Accuracy Tuning

Patent: 9,647,629 Date: 09/05/2017

Method for Calibration and Tuning with Impedance Tuners

Patent: 9,625,556 Date: 18/04/2017

Compact Two Probe Impedance Tuner

Patent: 9,620,842 Date: 11/04/2017

Circular Impedance Tuner

Patent: 9,602,072 Date: 21/03/2017

Coaxial Alignment Instrument Adapter

Patent: 9,553,376 Date: 24/01/2017

Noise Parameter Measurement System

Patent: 9,541,592 Date: 10/01/2017

Hybrid Load Pull System and Method

Patent: 9,459,336 Date: 04/10/2016

Intelligent Mechanical Balancing Apparatus for Slide Screw Tuner

Patent: 9,431,999 Date: 30/08/2016

A Wideband Attenuation and Phase Controller

Patent: 9,112,250 Date: 18/08/2016

Noise Parameter Extraction Method

Patent: 9,366,710 Date: 14/06/2016

Low Frequency Coaxial Capacitors and Tuners

Patent: 9,344,061 Date: 17/05/2016

A Method for Planarity Alignment of Waveguide Wafer Probes

Patent: 9,335,345 Date: 10/05/2016

Gamma Boosting Unit (GBU) for Hybrid Load and Source Pull

Patent: 9,331,670 Date: 03/05/2016

A Method for Planarity Alignment of Wafer Probes

Patent: 9,322,843 Date: 26/04/2016

An Impedance Tuner with Adjustable Electrical Length

Patent: 9,325,290 Date: 26/04/2016

A Load and Source Pull Test System for RF and Baseband Frequencies

Patent: 9,310,410 Date: 12/04/2016

Impedance Tuners with Rotating Multi-Section Probes

Patent: 9,276,551 Date: 01/03/2016

A Method for Maximizing for Reflection Factor of Impedance Tuners

Patent: 9,267,977 Date: 23/02/2016

Impedance Tuners with Rotating Probes

Patent: 9,257,963 Date: 09/02/2016

Wideband Attenuation and Phase Controller

Patent: 9,252,471 Date: 02/02/2016

Wideband Tuning Probes for Impedance Tuners and Method

Patent: 9,252,738 Date: 02/02/2016

Multi-Source Active Injection Load Pull System and Method

Patent: 9,213,056 Date: 15/12/2015

Adaptable Pre-Matched Tuner Systems and Method

Patent: RE45,667 Date: 15/12/2015

A Mechanically Short Multi-Carriage Tuner and Method

Patent: 9,041,498 Date: 26/05/2015

An Impedance Tuner using Dielectrically Filled Airline

Patent: 8,975,988 Date: 10/03/2015

Waveguide Tuners with Planarity Adjustment for Wafer Probing

Patent: 8,933,707 Date: 13/01/2015

Improved Mechanically Controlled Variable Capacitors for Impedance Tuner

Patent: 8,919,861 Date: 16/12/2014

Method for Preventing Electrical Short in Impedance Tuners Using Mechanical Stop

Patent: 8,854,162 Date: 07/10/2014

Adjustable Signal Sampling Sensor and Method

Patent: 8,841,921 Date: 23/09/2014

Noise parameter Measurement System and Method

Patent: 8,786,293 Date: 22/07/2014

VHF Harmonic Impedance Tuner

Patent: 8,629,742 Date: 14/01/2014

Calibration and Tuning Using Compact Multi Frequency-Range Impedance Tuners

Patent: 8,896,401 Date: 25/11/2013

Method for Reducing Power Requirements in Active L/P Systems

Patent: 8,497,689 Date: 30/07/2013

VHF Harmonic Impedance Tuner

Patent: 8,497,745 Date: 30/07/2013

Impedance Tuner with Integrated Bias Network

Patent: 8,466,758 Date: 18/06/2013

Impedance Tuners with Mechanical Stop

Patent: 8,461,946 Date: 11/06/2013

Self-Adjustable Probes for Slide Screw Impedance Tuners

Patent: 8,427,255 Date: 23/04/2013

Compact Multi Frequency-Range Impedance Tuner

Patent: 8,410,862 Date: 02/04/2013

Wideband I-V Probe and Method

Patent: 8,405,405 Date: 26/03/2013

Wideband Low Frequency Impedance Tuner

Patent: 8,405,466 Date: 26/03/2013

Harmonic Impedance Tuner with Four Wideband Probes and Methods

Patent: 8,405,475 Date: 26/03/2013

Compact Harmonic Impedance Tuner

Patent: 8,400,238 Date: 19/03/2013

Harmonic Rejection Tuner with Adjustable Short Circuited Resonators

Patent: 8,362,787 Date: 29/01/2013

Impedance Tuners with Resonant Probes

Patent: 8,358,186 Date: 22/01/2013

Harmonic Impedance Tuner with Four Wideband Peobes and Method

Patent: 8,212,628 Date: 03/07/2012

Wideband Low Frequency Impedance Tuner

Patent: 8,212,629 Date: 03/07/2012

Autonomous Impedance Tuner with Human Control Interface

Patent: 8,203,348 Date: 19/06/2012

Compact Harmonic Impedance Tuner

Patent: 8,188,816 Date: 29/05/2012

High Frequency Circuit Analyser

Patent: 7,816,926 Date: 19/10/2010

Low Frequency Electro-Mechanical Impedance Tuner

Patent: 7,646,267 Date: 12/01/2010

Low Frequency Harmonic Load Pull Tuner and Method

Patent: 7,646,268 Date: 12/01/2010

Harmonic Rejection Tuner with Adjustable Resonators

Patent: 7,561,004 Date: 14/07/2009

Harmonic Load Pull Tuner with Resonant Pre-matching Module

Patent: 7,449,893 Date: 11/11/2008

Method of Combining Signals and Device Therefor

Patent: 7,385,461 Date: 10/06/2008

Frequency Selective Load Pull Tuner and Method

Patent: 7,248,866 Date: 24/07/2007

Triple Probe Automatic Slide Screw Load Pull Tuner and Method

Patent: 7,135,941 Date: 14/11/2006

Mechanically Balanced Microwave Load Pull Tuner

Patent: 7,102,457 Date: 05/09/2006

High Reflection Microwave Tuner Using Metal-dielectric Probe and Method

Patent: 7,035,628 Date: 30/05/2006

High Frequency, High Reflection Pre-Matching Tuners with Variable Zero Initialization

Patent: 7,034,629 Date: 25/04/2006

Low Loss Integration of Wafer Probes with Microwave Tuners

Patent: 6,998,836 Date: 14/02/2006

Microwave Tuners for Wideband High Reflection Applications

Patent: 6,850,076 Date: 02/01/2005

Adaptable Pre-Matched Tuner System and Method

Patent: 6,674,293 Date: 06/01/2004

Methods and Apparatus for Time-Domain Measurement with a High Frequency Circuit Analyzer

Patent: 6,639,393 Date: 28/10/2003

Low-Loss Microwave Device Test Fixture with Adjustable Blocks

Patent: 6,414,563 Date: 02/07/2002

Harmonic Rejection Load Tuner

Patent: 6,297,649 Date: 02/10/2001

Pending

Pre-Matched Hybrid Load Pull Tuner for Modulated Signal and Method

Patent: 18/375,083 Date: 29/09/2023

Load Pull System Using Tuner with Two Dual-State Probes

Patent: 18/368,668 Date: 15/09/2023

Method for Dynamic Balancing Slide Screw Tuners On Wafer

Patent: 18/244,416 Date: 11/09/2023

Load Pull Tuner With Integrated On-Wafer Planarity Control

Patent: 18/244,436 Date: 11/09/2023

Active Load Pull System

Patent: 18/222,517 Date: 17/07/2023

Load Pull Tuner on Waveguide Wafer-Probe

Patent: 18/221,433 Date: 13/07/2023

Load Pull Tuning Probe with Adjustable Notch

Patent: 18/221,094 Date: 12/07/2023

Anti Abrasion Wafer Probes

Patent: 18/143,165 Date: 04/05/2023

Load Pull Tuner for Waveguide Wafer Probe

Patent: 18/133,554 Date: 12/04/2023

Harmonic Load Pull Tuner

Patent: 18/113,850 Date: 24/02/2023

Two Probe Low Profile Tuner

Patent: 17/981,415 Date: 05/11/2022

A Simple Waveguide Load Pull Tuner

Patent: 17/975,885 Date: 28/10/2022

Waveguide Slide Screw Tuner and Method

Patent: 17/965,900 Date: 14/10/2022

Directional Signal Coupler-Divider

Patent: 17/966,728 Date: 14/10/2022

Waveguide Tuner with Signal Coupler-Divider

Patent: 17/966,757 Date: 14/10/2022

Tuning Methods for Digital Hybrid Load Pull System

Patent: 17/960,990 Date: 06/10/2022

Anti-Skewing Impedance Tuner Calibration

Patent: 17/871,316 Date: 22/07/2022

Two Probe Compact Slide Screw Tuner and Method

Patent: 17/829,756 Date: 01/06/2022

On-Wafer Tuner with Contact Control

Patent: 17/827,861 Date: 30/05/2022

Planarity Control for Load Pull Tuner On Wafer

Patent: 17/826,838 Date: 27/05/2022

Sub-THz Vector Load Pull Tuner

Patent: 17/725,728 Date: 21/04/2022

Very Low Frequency Tuner with Adjustable Dielectric

Patent: 17/541,404 Date: 03/12/2021

Load Pull Tuner with 2-State Probes

Patent: 17/524,836 Date: 12/11/2021

Adjustable Directional Coupler

Patent: 17/518,225 Date: 03/11/2021

Hybrid Harmonic Source Pull Tuner System

Patent: 16/509,936 Date: 12/07/2019

Provisional

Impedance Tuners
Active Load Pull System
Pulsed IV System
Device Modelling
System Accessories
See all products

Load Pull

Ruggedness

Noise Measurements

Pulsed IV Systems

Device Modeling

See all applications