H03D 7/18
Modifications of frequency-changers for eliminating image frequencies
Official title: Modifications of frequency-changers for eliminating image frequencies {(H03D7/16 takes precedence)}
H03D7/18 (Modifications of frequency-changers for eliminating image frequencies) appears on 235 US grants and 151 published applications in this corpus.
Search patents in H03D- Granted patents
- 235
- Published applications
- 151
- Assignees
- 128
- Inventors
- 362
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 5 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 5 | 0 |
| 1997 | 6 | 0 |
| 1998 | 2 | 0 |
| 1999 | 7 | 0 |
| 2000 | 13 | 0 |
| 2001 | 7 | 5 |
| 2002 | 7 | 9 |
| 2003 | 8 | 8 |
| 2004 | 8 | 9 |
| 2005 | 8 | 12 |
| 2006 | 14 | 12 |
| 2007 | 12 | 11 |
| 2008 | 9 | 6 |
| 2009 | 10 | 7 |
| 2010 | 6 | 13 |
| 2011 | 9 | 14 |
| 2012 | 14 | 3 |
| 2013 | 5 | 7 |
| 2014 | 12 | 13 |
| 2015 | 14 | 5 |
| 2016 | 6 | 2 |
| 2017 | 4 | 0 |
| 2018 | 0 | 1 |
| 2019 | 2 | 1 |
| 2020 | 0 | 3 |
| 2021 | 1 | 0 |
| 2022 | 1 | 2 |
| 2023 | 2 | 4 |
| 2024 | 1 | 2 |
| 2025 | 1 | 0 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Photonic image rejection RF mixer, a phased-array radio frequency receiver implementing the same and related methods of operation19 May 2026US 12,633,876 B2Phase Sensitive Innovations, Inc.
- Compact, low-power, high image rejection sideband separation receiver7 Apr 2026US 12,596,081 B2Arizona Board of Regents On Behalfof Arizona State University
- Mixer-first radio receiver circuitry30 Sep 2025US 12,431,928 B2Rockwell Collins, Inc.
- Amplifier circuit for amplifying sinusoid signals17 Dec 2024US 12,170,508 B2Sivers Wireless AB
- Transposed delay line oscillator and method17 Oct 2023US 11,791,810 B2Nanowave Technologies Inc.
- Phase-adjustment of multiphase local oscillator (lo) signals for a harmonic rejection mixer (hrm)17 Sep 2026US 2026/0280488 A1QUALCOMM Incorporated
- Photonic image rejection rf mixer, a phased-array radio frequency receiver implementing the same and related methods of operation3 Sep 2026US 2026/0261240 A1Phase Sensitive Innovations, Inc.
- Mixer-first radio receiver circuitry19 Dec 2024US 2024/0421840 A1Rockwell Collins, Inc.
- Photonic image rejection rf mixer, a phased-array radio frequency receiver implementing the same and related methods of operation11 Jul 2024US 2024/0235479 A1Phase Sensitive Innovations, Inc.
- Compact, low-power, high image rejection sideband separation receiver28 Sep 2023US 2023/0304945 A2Arizona Board of Regents on behalf of Arizona State University
Most cited
By later US patents
- Image rejection mixer196US 6,127,962 AB.E.L.-Tronics Limited · 2000
- Mixer device with image frequency rejection156US 5,901,349 AMatra Communication · 1999
- Image reject mixer, circuit, and method for image rejection131US 6,226,509 B1Nortel Networks Limited · 2001
- System and method for an image rejecting single conversion tuner with phase error correction128US 6,714,776 B1Microtune (Texas), L.P. · 2004
- Multi-band tuner with fixed broadband input filters127US 4,132,952 ASony Corporation · 1979