G01R 27/28
Measuring attenuation, gain, phase shift or derived characteristics of electric four pole
Official title: Measuring attenuation, gain, phase shift or derived characteristics of electric four pole networks, i.e. two-port networks; Measuring transient response (in line transmission systems H04B3/46)
G01R27/28 (Measuring attenuation, gain, phase shift or derived characteristics of electric four pole) appears on 1,111 US grants and 891 published applications in this corpus.
Search patents in G01R- Granted patents
- 1,111
- Published applications
- 891
- Assignees
- 441
- Inventors
- 1,795
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 3 | 0 |
| 1978 | 12 | 0 |
| 1979 | 5 | 0 |
| 1980 | 7 | 0 |
| 1981 | 12 | 0 |
| 1982 | 4 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 7 | 0 |
| 1986 | 4 | 0 |
| 1987 | 10 | 0 |
| 1988 | 6 | 0 |
| 1989 | 11 | 0 |
| 1990 | 8 | 0 |
| 1991 | 11 | 0 |
| 1992 | 10 | 0 |
| 1993 | 3 | 0 |
| 1994 | 7 | 0 |
| 1995 | 3 | 0 |
| 1996 | 13 | 0 |
| 1997 | 9 | 0 |
| 1998 | 10 | 0 |
| 1999 | 7 | 0 |
| 2000 | 18 | 0 |
| 2001 | 10 | 3 |
| 2002 | 17 | 16 |
| 2003 | 23 | 20 |
| 2004 | 17 | 27 |
| 2005 | 23 | 36 |
| 2006 | 45 | 31 |
| 2007 | 22 | 35 |
| 2008 | 17 | 32 |
| 2009 | 26 | 30 |
| 2010 | 28 | 32 |
| 2011 | 24 | 31 |
| 2012 | 21 | 33 |
| 2013 | 28 | 34 |
| 2014 | 37 | 45 |
| 2015 | 35 | 49 |
| 2016 | 45 | 40 |
| 2017 | 56 | 46 |
| 2018 | 59 | 46 |
| 2019 | 62 | 46 |
| 2020 | 61 | 41 |
| 2021 | 69 | 38 |
| 2022 | 38 | 53 |
| 2023 | 50 | 33 |
| 2024 | 43 | 38 |
| 2025 | 39 | 38 |
| 2026 | 26 | 18 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Electronic device and method for calibrating temperature related scattering matrix of temperature sensitive device6 Oct 2026US 12,754,080 B2Mediatek Inc.
- Test and/or measurement system and method1 Sep 2026US 12,724,056 B2Rohde & Schwarz GmbH & Co.KG
- Test and/or measurement system and method for calibrating a test and/or measurement system1 Sep 2026US 12,724,102 B2Rohde & Schwarz GmbH & Co.KG
- Measurement device, especially vector network analyzer, calibration18 Aug 2026US 12,710,500 B2Rohde & Schwarz GmbH & Co.KG
- Mixed mode hybrid harmonic load pull system4 Aug 2026US 12,699,127 B1
- Test and/or measurement system8 Oct 2026US 2026/0309826 A1
- Crosstalk tolerant lrrm auto-load inductance calibration1 Oct 2026US 2026/0299072 A1Qorvo US, Inc.
- Detection of electric discharges that precede fires in electrical wiring24 Sep 2026US 2026/0287629 A1Whisker Labs, Inc.
- Millimeter-wave vector network analyzer17 Sep 2026US 2026/0276674 A1Ohio State Innovation Foundation
- Tunable impedance matching methods and circuits for protection against side-channel attacks27 Aug 2026US 2026/0254432 A1APPLIED Materials.Inc.
Most cited
By later US patents
- Method and apparatus for adjusting a field of a signal to mitigate interference470US 9,847,566 B2AT&T Intellectual Property I, L. P. · 2017
- RF impedance matching network198US 9,306,533 B1Reno Technologies, Inc. · 2016
- Apparatus and method for measuring the phase and magnitude of microwave signals181US 5,524,281 AWiltron Company · 1996
- Methods for the measurement of the frequency dependent complex propagation matrix, impedance matrix and admittance matrix of coupled transmission lines166US 5,502,392 AInternational Business Machines Corporation · 1996
- Method and apparatus for calibrating a multiport test system for measurement of a DUT153US 6,920,407 B2Agilent Technologies, Inc. · 2005