Electronics and Telecommunications Research Institute

Other

Seok Kil Han

Kwang Yong Kang

Jeong Dae Suh

Min Hwan Kwak

Dal Ahn

Sang Dong Jung

Herold R Fettemam

Disclosed is a high-temperature superconductor low-pass filter for removing broadband harmonics in a wireless communication system. The high-temperature superconductor low-pass filter includes a coupled line section and a transmission line section, in which the coupled line section is connected in parallel with the transmission line section. The coupled line section has two microstrip open-stub type parallel stripe lines stacked on a high-temperature superconductor, and the transmission line section has one stripe line. Since the high-temperature superconductor low-pass filter has attenuation poles at a stopband, it has stopband characteristics to 7-8 times wider than a cutoff frequency. The high-temperature superconductor low-pass filter can easily remove sub-harmonics which are inevitably occurred in the wireless communication system.

High-temperature superconductor low-pass filter for suppressing broadband harmonics

A near-field optical heterodyne measurement system for measuring characteristic of high-frequency and high-speed devices includes a combining unit for combining two optical beams to produce a submicron-size optical beam, wherein the two optical beams have different frequency from each other, a near-field fiber-optic probe for injecting the submicron-size optical beam into a sample device to be measured, a position controlling unit for controlling a position of the near-field fiber-optic probe, and a measuring unit for receiving a millimeter wave exited from the sample device to measure characteristics of the sample device.

Near-field optical heterodyne measurement system using near-field fiber-optic probe

A method of manufacturing a double-sided high-temperature superconducting oxide thin film comprises the steps of placing two sintered material targets in a thin film deposition chamber; attaching a single crystal oxide substrate to a substrate supporter piercing through a separator of the thin film deposition chamber; rotating the single crystal oxide substrate, placing two substrate heaters toward both surfaces of the single crystal oxide substrate, and heating the single crystal oxide substrate thereby; applying a power to sputter to the sintered material targets; and depositing a target material on both surfaces of the single crystal oxide substrate by having plasma generated from the two sintered material targets contact thereon.

Method for manufacturing a double-sided high-temperature superconducting oxide thin film having large area

Growing community of inventors

Taejon, South Korea

Seok Kil Han