Location History:
- Olathe, KS (US) (1999)
- San Diego, CA (US) (2000)
Company Filing History:
3 out of 340 
1 out of 832,880 Years Active: 1999-2000
Title: Innovations of Chien H Ho in Antenna Technology
Introduction
Chien H Ho is a notable inventor based in San Diego, CA, with a focus on advancements in antenna technology. He holds a total of 4 patents, showcasing his contributions to the field of GPS receivers.
Latest Patents
One of his latest inventions is the Crank Quadrifilar Slot Antenna. This innovative antenna features a cylindrical dielectric body that is covered with a conductive coating. It incorporates four crank-shaped slots arranged in a helical pattern, extending around half of its circumference to provide right-hand circular polarization for receiving GPS signals. A microstrip feed system is integrated to create balanced currents along both sides of each slot, ensuring that the impedance transformation remains unaffected.
Another significant patent is the Hexafilar Slot Antenna. Similar to his previous invention, this antenna also has a cylindrical dielectric body with a conductive coating. It is designed with six helical slots that extend around half of its circumference, providing right-hand circular polarization for GPS signal reception. The microstrip feed system in this design is also arranged to maintain balanced currents along both sides of each slot, preserving the impedance transformation.
Career Highlights
Chien H Ho has made significant strides in the field of antenna technology, particularly in the development of antennas for GPS applications. His work has been instrumental in enhancing the performance and reliability of GPS receivers.
Collaborations
Throughout his career, Chien H Ho has collaborated with various professionals, including Paul K Shumaker. Their joint efforts have contributed to the advancement of antenna technology.
Conclusion
Chien H Ho's innovative work in antenna technology, particularly with his patents for the Crank Quadrifilar and Hexafilar Slot Antennas, highlights his significant contributions to the field. His inventions continue to impact the performance of GPS receivers, showcasing the importance of innovation in technology.