H01Q 21/24
Combinations of antenna units polarised in different directions for transmitting or receiving
Official title: Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction {(circularly polarised patch antennas H01Q9/0428; circularly polarised horns H01Q13/0241; cross-polarised horns H01Q13/0258; polarisation converters H01Q15/242; cross-polarised rear feeds H01Q19/136; crossed polarisation dual antenna H01Q25/001)}
H01Q21/24 (Combinations of antenna units polarised in different directions for transmitting or receiving) appears on 3,944 US grants and 4,145 published applications in this corpus.
Search patents in H01Q- Granted patents
- 3,944
- Published applications
- 4,145
- Assignees
- 1,294
- Inventors
- 6,805
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 10 | 0 |
| 1978 | 9 | 0 |
| 1979 | 2 | 0 |
| 1980 | 10 | 0 |
| 1981 | 10 | 0 |
| 1982 | 6 | 0 |
| 1983 | 6 | 0 |
| 1984 | 12 | 0 |
| 1985 | 12 | 0 |
| 1986 | 8 | 0 |
| 1987 | 11 | 0 |
| 1988 | 7 | 0 |
| 1989 | 16 | 0 |
| 1990 | 9 | 0 |
| 1991 | 12 | 0 |
| 1992 | 13 | 0 |
| 1993 | 19 | 0 |
| 1994 | 13 | 0 |
| 1995 | 17 | 0 |
| 1996 | 21 | 0 |
| 1997 | 13 | 0 |
| 1998 | 28 | 0 |
| 1999 | 36 | 0 |
| 2000 | 52 | 0 |
| 2001 | 50 | 6 |
| 2002 | 60 | 44 |
| 2003 | 61 | 64 |
| 2004 | 50 | 74 |
| 2005 | 57 | 65 |
| 2006 | 67 | 59 |
| 2007 | 36 | 65 |
| 2008 | 51 | 73 |
| 2009 | 54 | 102 |
| 2010 | 57 | 96 |
| 2011 | 74 | 74 |
| 2012 | 59 | 74 |
| 2013 | 80 | 126 |
| 2014 | 77 | 113 |
| 2015 | 95 | 154 |
| 2016 | 121 | 146 |
| 2017 | 154 | 206 |
| 2018 | 172 | 219 |
| 2019 | 238 | 244 |
| 2020 | 230 | 341 |
| 2021 | 319 | 320 |
| 2022 | 306 | 318 |
| 2023 | 269 | 362 |
| 2024 | 306 | 363 |
| 2025 | 314 | 272 |
| 2026 | 224 | 165 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Low-profile magneto-electric dipole antenna6 Oct 2026US 12,756,104 B1Lockheed Martin Corporation
- Antenna having a spatial bandpass structure and parasitic radiator6 Oct 2026US 12,756,106 B2Galtronics USA, Inc.
- Multi-antenna assembly for compact electronic devices6 Oct 2026US 12,756,113 B2Zebra Technologies Corporation
- Dipole antenna unit and base station antenna6 Oct 2026US 12,756,114 B2Suzhou Luxshare Technology Co., Ltd.
- Array antenna device29 Sep 2026US 12,749,825 B2Mitsubishi Electric Corporation
- Scalable Digital Polarimetric Phased Array Radar and Methods of Use8 Oct 2026US 2026/0312297 A1The Board of Regents of the University of Oklahoma
- Antenna substrate8 Oct 2026US 2026/0312298 A1Fujikura Ltd.
- Antenna1 Oct 2026US 2026/0302608 A1Uniqconn Inc.
- Radio frequency devices and systems including radio frequency devices1 Oct 2026US 2026/0302649 A1Infineon Technologies AG
- Low elevation angle nulling antenna methods and systems24 Sep 2026US 2026/0291074 A1
Most cited
By later US patents
- Radio frequency local area network481US 5,295,154 ANorand Corporation · 1994
- Radio frequency identification tag368US 5,682,143 AInternational Business Machines Corporation · 1997
- Medical assistance and tracking system and method employing smart tags320US 7,158,030 B2Avante International Technology, Inc. · 2007
- Intelligent backhaul radio and antenna system311US 8,467,363 B2CBF Networks, Inc. · 2013
- Wireless packet switched communication systems and networks using adaptively steered antenna arrays291US 6,970,682 B2Vivato, Inc. · 2005