H03F 3/60
Amplifiers in which coupling networks have distributed constants
Official title: Amplifiers in which coupling networks have distributed constants, e.g. with waveguide resonators (H03F3/54 takes precedence)
H03F3/60 (Amplifiers in which coupling networks have distributed constants) appears on 2,052 US grants and 1,726 published applications in this corpus.
Search patents in H03F- Granted patents
- 2,052
- Published applications
- 1,726
- Assignees
- 612
- Inventors
- 3,106
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 7 | 0 |
| 1978 | 7 | 0 |
| 1979 | 2 | 0 |
| 1980 | 5 | 0 |
| 1981 | 13 | 0 |
| 1982 | 5 | 0 |
| 1983 | 11 | 0 |
| 1984 | 10 | 0 |
| 1985 | 20 | 0 |
| 1986 | 15 | 0 |
| 1987 | 18 | 0 |
| 1988 | 21 | 0 |
| 1989 | 14 | 0 |
| 1990 | 15 | 0 |
| 1991 | 27 | 0 |
| 1992 | 37 | 0 |
| 1993 | 27 | 0 |
| 1994 | 22 | 0 |
| 1995 | 16 | 0 |
| 1996 | 20 | 0 |
| 1997 | 20 | 0 |
| 1998 | 26 | 0 |
| 1999 | 38 | 0 |
| 2000 | 39 | 0 |
| 2001 | 42 | 11 |
| 2002 | 43 | 57 |
| 2003 | 49 | 63 |
| 2004 | 72 | 81 |
| 2005 | 47 | 47 |
| 2006 | 60 | 65 |
| 2007 | 60 | 58 |
| 2008 | 55 | 70 |
| 2009 | 57 | 65 |
| 2010 | 67 | 62 |
| 2011 | 60 | 60 |
| 2012 | 57 | 88 |
| 2013 | 62 | 84 |
| 2014 | 96 | 80 |
| 2015 | 92 | 76 |
| 2016 | 76 | 88 |
| 2017 | 84 | 61 |
| 2018 | 76 | 81 |
| 2019 | 85 | 67 |
| 2020 | 76 | 66 |
| 2021 | 57 | 84 |
| 2022 | 59 | 59 |
| 2023 | 47 | 66 |
| 2024 | 35 | 71 |
| 2025 | 54 | 65 |
| 2026 | 43 | 51 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Doherty amplifier system6 Oct 2026US 12,756,363 B2Qorvo US, Inc.
- Method for supplying a laser or plasma with power, and plasma or laser system29 Sep 2026US 12,749,653 B2Trumpf HüTtinger GmbH + Co. KG
- Open-collector variable gain amplifier and method therefor15 Sep 2026US 12,738,911 B2MACOM Technology Solutions Holdings, Inc.
- Stacked coaxial cavity combiner for combining a plurality of amplifiers, the combiner having an outer conductor wall and plural inner conductor blocks18 Aug 2026US 12,712,507 B2Korea Institute of Fusion Energy
- Variable gain optical modulator with open collector driver amplifier and method of operation18 Aug 2026US 12,712,508 B2MACOM Technology Solutions Holdings, Inc.
- Multistage amplifier8 Oct 2026US 2026/0312542 A1NTT, Inc.
- Power amplifier circuit and multi-stage power amplifier circuit1 Oct 2026US 2026/0303044 A1Murata Manufacturing Co., Ltd.
- Power amplifier using coupler and electronic device including the same24 Sep 2026US 2026/0291443 A1Research & Business Foundation Sungkyunkwan University
- Planar solid state power amplifier architecture with integrated waveguide transitions, heat sink and combiner17 Sep 2026US 2026/0280505 A1Qorvo US, Inc.
- Damping resonance element with double-sided dc feeding technique for dc to mm-wave high gain cascode single-ended/differential distributed amplifier17 Sep 2026US 2026/0280506 A1Ciena Corporation
Most cited
By later US patents
- Waste energy control and management in power amplifier368US 5,568,088 AEricsson GE Mobile Communications Inc. · 1996
- High efficiency bi-directional spatial power combiner amplifier305US 5,214,394 ARockwell International Corporation · 1993
- Efficient parallel-stage power amplifier252US 5,872,481 AQUALCOMM Incorporated · 1999
- Wide-band gyrotron traveling-wave amplifier229US 4,533,875 A1985
- Modular microwave power combiner211US 4,175,257 AUnited Technologies Corporation · 1979