Inventor
Yongfei Zhu
Inventor
Columbia, MD, US
Overview
Patents· 32 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H01Pprimary
H01PWaveguides33%
H01QAntennas, i.e. radio aerials21%
H03HImpedance networks, e.g. resonant circuits15%
H04BTransmission10%
H05KPrinted circuits7%
H10DInorganic electric semiconductor devices4%
H01GCapacitors3%
H03FAmplifiers3%
C23CCoating metallic material1%
H10PGeneric processes or apparatus for the manufacture or treatment of devices covered by class h101%
PatentTitleYear
9,847,807Wide band antenna systems20179,698,758'Methods for tuning an adaptive impedance matching network with a look-up table'20178,957,742'Methods for tuning an adaptive impedance matching network with a look-up table'20158,674,783'Methods for tuning an adaptive impedance matching network with a look-up table'20148,421,548'Methods for tuning an adaptive impedance matching network with a look-up table'20138,395,459'Methods for tuning an adaptive impedance matching network with a look-up table'20138,072,285'Methods for tuning an adaptive impedance matching network with a look-up table'20117,154,357'Voltage tunable reflective coplanar phase shifters'20067,145,415'Electrically tunable filters with dielectric varactors'20067,034,636'Tunable filters having variable bandwidth and variable delay'20066,903,633'Electronic tunable filters with dielectric varactors'20056,876,279'Voltage tunable laminated dielectric materials for a coplanor waveguide'20056,864,840'Serially-fed phased array antennas with dielectric phase shifters'20056,801,104'Electronically tunable combline filters tuned by tunable dielectric capacitors'20046,801,102'Tunable filters having variable bandwidth and variable delay'20046,794,960'Voltage tunable laminated dielectric materials for microwave waveguide applications'20046,727,535'Ferroelectric varactor with built-in DC blocks'20046,717,491'Hairpin microstrip line electrically tunable filters'20046,710,679'Analog rat-race phase shifters tuned by dielectric varactors'20046,686,814'Voltage tunable varactors and tunable devices including such varactors'20046,686,817'Electronic tunable filters with dielectric varactors'20046,683,516'Voltage tunable laminated dielectric materials for microwave applications such as a tunable cavity'20046,683,517'Voltage tunable laminated dielectric materials for microwave applications such as a coaxial cable'20046,597,265'Hybrid resonator microstrip line filters'20036,556,102'RF/microwave tunable delay line'20036,531,936'Voltage tunable varactors and tunable devices including such varactors'20036,525,630'Microstrip tunable filters tuned by dielectric varactors'20036,404,614'Voltage tuned dielectric varactors with bottom electrodes'20026,377,217'Serially-fed phased array antennas with dielectric phase shifters'20026,377,142'Voltage tunable laminated dielectric materials for microwave applications'20026,377,440'Dielectric varactors with offset two-layer electrodes'20025,527,567'Metalorganic chemical vapor deposition of layered structure oxides'1996Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1996Based in Blacksburg, VA, US· patent location history
2002–2011Patents assigned to PARATEK MICROWAVE INC (25)· patent assignee history
2002–2006Based in Columbia, MD, US· patent location history
2006–2013Based in Ellicott City, MD, US· patent location history
2011–2013Patents assigned to SPEARS JOHN H (3)· patent assignee history
2011–2013Patents assigned to SUI CHENGGANG (3)· patent assignee history
2013–2014Patents assigned to RESEARCH IN MOTION RF INC (3)· patent assignee history
2013–2017Based in Nashua, NH, US· patent location history
2014–2017Patents assigned to BLACKBERRY LTD (4)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| PARATEK MICROWAVE INC | 25 | 2002–2011 |
| BLACKBERRY LTD | 4 | 2014–2017 |
| RESEARCH IN MOTION RF INC | 3 | 2013–2014 |
| SPEARS JOHN H | 3 | 2011–2013 |
| SUI CHENGGANG | 3 | 2011–2013 |
Locations
| Location | Patents | Span |
|---|---|---|
| Columbia, Maryland, US | 22 | 2002–2006 |
| Nashua, NH, US | 5 | 2013–2017 |
| Ellicott City, Maryland, US | 4 | 2006–2013 |
| Blacksburg, Virginia, US | 1 | 1996 |