Inventor · disambiguated record
Donald C. D. Chang
Also filed as: CHANG DONALD · CHANG DONALD C · CHANG DONALD C D
139 granted patents·26 pending applications·2,763 citations·filing 1983–2023
99Inventor score
Files withSPATIAL DIGITAL SYSTEMS INC66CHANG DONALD C D28HUGHES ELECTRONICS CORP27DIRECTV GROUP INC16HUGHES AIRCRAFT CO15
Top patents by PatentIndex Score
165 records- 0199US8547897B2Coherent power combining for signals through multiple satellite communications channelsCHANG DONALD C D·Filed 2011·Granted Oct 1, 2013·53 cites·40 claims
- 0299US8111646B1Communication system for dynamically combining power from a plurality of propagation channels in order to improve power levels of transmitted signals without affecting receiver and propagation segmentsCHANG DONALD C D·Filed 2009·Granted Feb 7, 2012·68 cites·64 claims
- 0397US10574338B1Systems for surveillance using airborne platforms as receiving platforms for bistatic radarsSPATIAL DIGITAL SYSTEMS INC·Filed 2019·Granted Feb 25, 2020·22 cites·20 claims
- 0497US9356358B2Architectures and methods for novel antenna radiation optimization via feed repositioningCHANG DONALD C D·Filed 2010·Granted May 31, 2016·168 cites·19 claims
- 0597US7167704B2Communication system using multiple link terminals for aircraftDIRECTV GROUP INC·Filed 2006·Granted Jan 23, 2007·63 cites·14 claims
- 0696US11381302B1Multibeam VSAT for cluster of slightly inclined GSO satellitesSPATIAL DIGITAL SYSTEMS INC·Filed 2021·Granted Jul 5, 2022·4 cites·20 claims
- 0796US10484081B1Ground terminals via remote digital-beam-forming networks for satellites in non-geostationary orbitSPATIAL DIGITAL SYSTEMS INC·Filed 2018·Granted Nov 19, 2019·14 cites·15 claims
- 0896US6735437B2Communication system employing reuse of satellite spectrum for terrestrial communicationHUGHES ELECTRONICS CORP·Filed 1998·Granted May 11, 2004·260 cites·129 claims
- 0994US10069553B2Multi-user MIMO via active scattering platformsSPATIAL DIGITAL SYSTEMS INC·Filed 2017·Granted Sep 4, 2018·10 cites·20 claims
- 1094US8538326B2Accessing LP transponders with CP terminals via wavefront multiplexing techniquesCHANG DONALD C D·Filed 2011·Granted Sep 17, 2013·12 cites·20 claims
- 1193US6388615B1Micro cell architecture for mobile user tracking communication systemHUGHES ELECTRONICS CORP·Filed 2000·Granted May 14, 2002·57 cites·13 claims
- 1293US4788515ADielectric loaded adjustable phase shifting apparatusHUGHES AIRCRAFT CO·Filed 1988·Granted Nov 29, 1988·61 cites·26 claims
- 1392US8570103B2Flexible multi-channel amplifiers via wavefront muxing techniquesCHANG DONALD C D·Filed 2011·Granted Oct 29, 2013·14 cites·23 claims
- 1492US7187949B2Multiple basestation communication system having adaptive antennasDIRECTV GROUP INC·Filed 2001·Granted Mar 6, 2007·71 cites·19 claims
- 1591US8395546B2Receive only smart ground-terminal antenna for geostationary satellites in slightly inclined orbitsCHANG DONALD C D·Filed 2011·Granted Mar 12, 2013·9 cites·23 claims
- 1690US10277306B2Systems for surveillance using airborne platforms as receiving platforms for bistatic radarsSPATIAL DIGITAL SYSTEMS INC·Filed 2017·Granted Apr 30, 2019·7 cites·20 claims
- 1790US9502022B2Apparatus and method of generating quiet zone by cancellation-through-injection techniquesCHANG DONALD C D·Filed 2010·Granted Nov 22, 2016·12 cites·22 claims
- 1890US7103317B2Communication system using multiple link terminals for aircraftDIRECTV GROUP INC·Filed 2001·Granted Sep 5, 2006·39 cites·21 claims
- 1990US6295440B2Multiple satellite mobile communications method and apparatus for hand-held terminalsHUGHES ELECTRONICS CORP·Filed 2000·Granted Sep 25, 2001·32 cites·7 claims
- 2089US8384572B2Noise injection techniqueSPATIAL DIGITAL SYSTEMS INC·Filed 2011·Granted Feb 26, 2013·7 cites·20 claims
- 2189US7200360B1Communication system as a secondary platform with frequency reuseDIRECTV GROUP INC·Filed 2000·Granted Apr 3, 2007·39 cites·16 claims
- 2288US6766987B2Satellite system and method of deploying sameHUGHES ELECTRONICS CORP·Filed 2002·Granted Jul 27, 2004·25 cites·9 claims
- 2388US6380893B1Ground-based, wavefront-projection beamformer for a stratospheric communications platformHUGHES ELECTRONICS CORP·Filed 2000·Granted Apr 30, 2002·42 cites·33 claims
- 2488US5903549AGround based beam forming utilizing synchronized code division multiplexingHUGHES ELECTRONICS CORP·Filed 1997·Granted May 11, 1999·116 cites·18 claims
- 2587US10491325B1Composite data transport and storage via wavefront multiplexingSPATIAL DIGITAL SYSTEMS INC·Filed 2018·Granted Nov 26, 2019·4 cites·18 claims
- 2687US9496886B2System for processing data streamsSPATIAL DIGITAL SYSTEMS INC·Filed 2014·Granted Nov 15, 2016·8 cites·20 claims
- 2787US6559797B1Overlapping subarray patch antenna systemHUGHES ELECTRONICS CORP·Filed 2001·Granted May 6, 2003·51 cites·18 claims
- 2887US4635063AAdaptive antennaHUGHES AIRCRAFT CO·Filed 1983·Granted Jan 6, 1987·61 cites·10 claims
- 2986US9692549B2Accessing CP channels with LP terminals via wavefront multiplexingLEE JUO-YU·Filed 2015·Granted Jun 27, 2017·7 cites·20 claims
- 3086US7181162B2Communication system using multiple link terminalsDIRECTV GROUP INC·Filed 2001·Granted Feb 20, 2007·33 cites·20 claims
- 3186US6725013B1Communication system having frequency reuse in non-blocking mannerHUGHES ELECTRONICS CORP·Filed 2000·Granted Apr 20, 2004·33 cites·18 claims
- 3286US6336612B1Satellite system and method of deploying sameHUGHES ELECTRONICS CORP·Filed 2001·Granted Jan 8, 2002·22 cites·6 claims
- 3386US6229477B1Method and system for determining a position of a communication satellite utilizing two-way rangingHUGHES ELECTRONICS CORP·Filed 1998·Granted May 8, 2001·127 cites·22 claims
- 3486US4994809APolystatic correlating radarHUGHES AIRCRAFT CO·Filed 1990·Granted Feb 19, 1991·112 cites·14 claims
- 3585US9829580B2Generating quiet zone by noise cancellation via injection techniquesSPATIAL DIGITAL SYSTEMS INC·Filed 2016·Granted Nov 28, 2017·3 cites·20 claims
- 3684US7068616B2Multiple dynamic connectivity for satellite communications systemsDIRECTV GROUP INC·Filed 2001·Granted Jun 27, 2006·27 cites·26 claims
- 3784US6507314B2Ground-based, wavefront-projection beamformer for a stratospheric communications platformHUGHES ELECTRONICS CORP·Filed 2002·Granted Jan 14, 2003·33 cites·25 claims
- 3884US5128689AEhf array antenna backplate including radiating modules, cavities, and distributor supported thereonHUGHES AIRCRAFT CO·Filed 1990·Granted Jul 7, 1992·74 cites·30 claims
- 3983US11887575B2Generating acoustic quiet zone by noise injection techniquesSPATIAL DIGITAL SYSTEMS INC·Filed 2018·Granted Jan 30, 2024·2 cites·20 claims
- 4082US8643562B2Compact patch antenna arrayCHANG DONALD C D·Filed 2010·Granted Feb 4, 2014·6 cites·20 claims
- 4182US7027769B1GEO stationary communications system with minimal delayDIRECTV GROUP INC·Filed 2000·Granted Apr 11, 2006·23 cites·48 claims
- 4282US6460808B2Satellite system and method of deploying sameHUGHES ELECTRONICS CORP·Filed 2001·Granted Oct 8, 2002·16 cites·12 claims
- 4382US5077562ADigital beam-forming technique using temporary noise injectionHUGHES AIRCRAFT CO·Filed 1990·Granted Dec 31, 1991·69 cites·17 claims
- 4481US10361775B2Retro-directive antenna systems for multi-channel communicationsSPATIAL DIGITAL SYSTEMS INC·Filed 2017·Granted Jul 23, 2019·2 cites·20 claims
- 4581US9287961B2Receive only smart ground-terminal antenna for geostationary satellites in slightly inclined orbitsCHANG DONALD C D·Filed 2013·Granted Mar 15, 2016·3 cites·20 claims
- 4681US6829479B1Fixed wireless back haul for mobile communications using stratospheric platformsDIRECTV GROUP INC·Filed 2000·Granted Dec 7, 2004·17 cites·13 claims
- 4781US6340947B1Method and system for determining a position of a transceiver unit utilizing two-way ranging in a polystatic satellite configuration including a ground radarHUGHES ELECTRONICS CORP·Filed 2000·Granted Jan 22, 2002·53 cites·10 claims
- 4878US10367262B2Architectures and methods for novel antenna radiation optimization via feed repositioningSPATIAL DIGITAL SYSTEMS INC·Filed 2016·Granted Jul 30, 2019·2 cites·20 claims
- 4978US9231729B2Resource allocation in PON networks via wave-front multiplexing and de-multiplexingCHANG DONALD C D·Filed 2013·Granted Jan 5, 2016·4 cites·20 claims
- 5077US4812788AWaveguide matrix including in-plane crossoverHUGHES AIRCRAFT CO·Filed 1987·Granted Mar 14, 1989·45 cites·10 claims
Showing the top 50 of 165 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →