Donald C. D. Chang
139Patents
25h-index
51Co-inventors
93Inventor score
Filing activity: May 6, 1983 → Mar 6, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US9356358B2 | Architectures and methods for novel antenna radiation optimization via feed repositioning | Electricity | 166 | Active |
| US6735437B2 | Communication system employing reuse of satellite spectrum for terrestrial communication | Electricity | 138 | Expired |
| US6229477A | Method and system for determining a position of a communication satellite utilizing two-way ranging | Physics | 107 | Expired |
| US7187949B2 | Multiple basestation communication system having adaptive antennas | Electricity | 96 | Expired |
| US5903549A | Ground based beam forming utilizing synchronized code division multiplexing | Electricity | 80 | Expired |
| US5969674A | Method and system for determining a position of a target vehicle utilizing two-way ranging | Physics | 74 | Expired |
| US4994809A | Polystatic correlating radar | Physics | 69 | Expired |
| US8111646B1 | Communication 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 segments | Electricity | 54 | Active |
| US5077562A | Digital beam-forming technique using temporary noise injection | Electricity | 49 | Expired |
| US8547897B2 | Coherent power combining for signals through multiple satellite communications channels | Electricity | 49 | Active |
| US5128689A | EHF array antenna backplate including radiating modules, cavities, and distributor supported thereon | Electricity | 46 | Expired |
| US7167704B2 | Communication system using multiple link terminals for aircraft | Electricity | 44 | Expired |
| US6388615B1 | Micro cell architecture for mobile user tracking communication system | Electricity | 43 | Expired |
| US4635063A | Adaptive antenna | Electricity | 41 | Expired |
| US4788515A | Dielectric loaded adjustable phase shifting apparatus | Electricity | 40 | Expired |
| US6340947B1 | Method and system for determining a position of a transceiver unit utilizing two-way ranging in a polystatic satellite configuration including a ground radar | Physics | 35 | Expired |
| US4883244A | Satellite attitude determination and control system with agile beam sensing | Performing Operations; Transporting | 35 | Expired |
| US6295440A | Multiple satellite mobile communications method and apparatus for hand-held terminals | Electricity | 30 | Expired |
| US6337980B1 | Multiple satellite mobile communications method and apparatus for hand-held terminals | Electricity | 28 | Expired |
| US6380893B1 | Ground-based, wavefront-projection beamformer for a stratospheric communications platform | Electricity | 28 | Expired |
| US7103317B2 | Communication system using multiple link terminals for aircraft | Electricity | 28 | Expired |
| US5001493A | Multiband gridded focal plane array antenna | Electricity | 27 | Expired |
| US6559797B1 | Overlapping subarray patch antenna system | Electricity | 27 | Expired |
| US6377208B2 | Method and system for determining a position of a transceiver unit utilizing two-way ranging in a polystatic satellite configuration | Physics | 26 | Expired |
| US6246363A | Method and system for incorporating two-way ranging navigation as a calibration reference for GPS | Physics | 25 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.