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Heng-Chia Chang Edit Profile

communications engineer

Heng-Chia Chang, Chinese communications engineer. Recipient Book Coupon award, National Taiwan University, 1987. Member of Institute of Electrical and Electronics Engineers.


Chang, Heng-Chia was born on July 26, 1968 in Taipei, Taiwan. Arrived in United States, 1992, permanent resident. Son of Te-Chi Chang and Yi-Chen Chen.


Bachelor of Science in Electrical Engineering, National Taiwan University, Taipei, 1990. Master of Science in Electrical and Company Engineering, University California, Santa Barbara, 1994. Doctor of Philosophy, University California, Santa Barbara, 1998.


Scientist Blue7 Communications, Inc., San Jose, California, 2003—2005. Engineer Reddot Wireless, Inc., Milpitas, since 2006. Consultant Aligare Communications, Inc., Taipei, 2005—2006.

Lieutenant Taiwan Air Force, 1990-1992.


  • Achievements include research in analytic solutions of phase noise and locking stability in coupled oscillators for active phased arrays in wireless communications. Patents pending for invent ultra-low noise Radio Frequency Integrated Circuits and microwave oscillators without using any solid state resonator, isolator, or circulator. Invention of injection-locked phase-locked loop (ILPLL) using an oscillator also acting as mixer for superior locking range and phase noise improvement.

    Explain and solve for stability and phase noise in self-injection-locked oscillators (SILO). First to solve for analytical solutions of phase noise in coupled phase-locked loops (CPLLs) for active phased array in wireless communication systems.


  • Other Work

    • Contributor encyclopedia of microwave engineering. Author: papers in field.


Member of Institute of Electrical and Electronics Engineers.


  • Other Interests

    Hiking, ping pong/table tennis, pool, volleyball, chess.


Te-Chi Chang

Yi-Chen Chen