Location History:
- Daeduk-ku, KR (1995)
- Taejon, KR (2000 - 2002)
- Daejeon, KR (2000 - 2002)
Company Filing History:
9 out of 11,277 
2 out of 192 
Years Active: 1995-2002
Title: Chang Hwa Lee: Innovator in Microwave Technology
Introduction
Chang Hwa Lee is a prominent inventor based in Taejon, South Korea. He has made significant contributions to the field of microwave technology, holding a total of nine patents. His work focuses on developing advanced communication systems that enhance signal processing and transmission.
Latest Patents
Among his latest patents is a microwave filter with a movable shield featuring alignment windows. Additionally, he has developed a duplexer utilizing stepped impedance resonators. This duplexer comprises open-ended resonators arranged on the front side of a dielectric block and shorted resonators on the rear side. It includes first grooves for controlling receiving coupling at the receiving filter and second grooves for controlling transmitting coupling at the transmitting filter. The design also features a plurality of recesses formed at the bottom of the dielectric block, extending from a first aperture of the open-ended resonators to a second aperture of the shorted resonators. This innovative duplexer is miniaturized by excluding external elements and boasts excellent attenuation characteristics, manufactured through simple processes.
Career Highlights
Chang Hwa Lee has worked with notable organizations such as the Electronics and Telecommunications Research Institute and the Korea Telecommunication Authority. His experience in these institutions has allowed him to refine his expertise in telecommunications and microwave technology.
Collaborations
Some of his coworkers include Sang Seok Lee and Bon Hee Koo, who have collaborated with him on various projects in the field.
Conclusion
Chang Hwa Lee's contributions to microwave technology and his innovative patents have significantly impacted the telecommunications industry. His work continues to influence advancements in communication systems.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.