Christopher T Koh

Title: The Innovations of Christopher T. Koh

Introduction

Christopher T. Koh is an accomplished inventor based in South Deerfield, MA (US). He holds 2 patents that showcase his expertise in wireless transmission technologies. His work has significantly contributed to advancements in high data rate signal transmission.

Latest Patents

One of his latest patents is titled "Architecture for wireless transmission of high rate optical signals." This invention involves an apparatus designed for the wireless transmission of high data rate signals, such as those received from an optical interface, including gigabit fiber channel or SONET. The architecture integrates direct detection of the optical signal with a clock and data recovery circuit, along with a differential signal encoder, which is preferably a differential quadrature phase shift encoder and modulator pair. A millimeter wave local oscillator and up conversion chain convert the optical input signal to a microwave carrier. In the reverse direction, the down converted signal is non-coherently phase detected and processed through synchronized clock and data recovery circuits to recover I and Q channel signals. These recovered signals are then combined and re-timed before being fed back to the optical transceiver.

Another notable patent is for a "Frequency conversion circuit using common local synthesizer." This invention pertains to a radio used in microwave datalink applications, where a common local oscillator is utilized for both the final RF up-converter stage and the initial RF down converter stage. The frequency of the common local oscillator corresponds to an integer multiple of a local oscillator needed for earlier or later stages. This circuit can provide a radio frequency carrier in the 30 GHz band using Coaxial Resonator Oscillators (CROs), which are suitable for planar microstrip circuit implementation.

Career Highlights

Christopher has worked with several companies throughout his career, including YDI Wireless, Inc. and Telaxis Communications Corporation. His experience in these organizations has allowed him to develop and refine his innovative ideas in the field of wireless communication.

Collaborations

Some of his notable coworkers include Wyley Robinson and Myung K. Lee. Their collaboration has contributed to the successful development of various projects in the wireless technology sector.

Conclusion

Christopher T. Koh's contributions to the field of wireless transmission technology are significant and impactful. His patents reflect a deep understanding of complex systems and a commitment to innovation. His work continues to influence advancements in high data rate