Hae-moon Seo

Title: Innovations of Hae-moon Seo

Introduction

Hae-moon Seo is a notable inventor based in Yongin, South Korea. He has made significant contributions to the field of wireless communication and signal processing. With a total of 5 patents to his name, Seo's work has advanced the technology used in various electronic devices.

Latest Patents

One of his latest patents is the "Single sideband mixer and method of extracting single sideband signal." This invention involves SSB mixers and methods capable of outputting a single frequency using multiple mixers and a local oscillating frequency without the need for phase-shifting. The design includes a first and second mixer that multiply an input intermediate frequency (IF) signal by a local IF signal. A band-pass filter passes the upper sideband signal output from the first mixer, while a third mixer multiplies these signals by a local oscillating (LO) signal. The fourth mixer operates similarly with the second mixer’s output. A subtraction device then subtracts the output signals of the third mixer from those of the fourth mixer. This innovation eliminates the need for a quadrature local oscillator, achieving a rejection characteristic against undesired signals of about 70 dB.

Another significant patent is the "Digital intermediate frequency transmitter for wireless communication." This invention enhances modulation quality, linearity, and power consumption. It allows for the embodiment of main characteristics of a wireless communication transmitter at a low cost by integrating components, thus eliminating the need for high-frequency phase shifters and voltage-controlled oscillators.

Career Highlights

Hae-moon Seo has worked with prominent companies such as Samsung Electronics Co., Ltd. and the Korea Electronics Technology Institute. His experience in these organizations has contributed to his expertise in electronic communications and signal processing.

Collaborations

Seo has collaborated with notable colleagues, including Young-jin Kim and Young-Kuk Park. Their joint efforts have furthered advancements in their respective fields.

Conclusion

Hae-moon Seo's innovative patents and career achievements highlight his significant impact on wireless communication technology. His work continues to influence the development of modern electronic devices.