Electronics and Telecommunications Research Institute

Chungbuk National University Industry-Academic Cooperation Foundation

Jong Moon Lee

Cheol Sig Pyo

Soon Ik Jeon

Hyuk Joo Kim

Jong-Suk Chae

Jong Suk Chae

Nae-Soo Kim

Jae Ick Choi

Hyung Do Choi

Seong-Ho Son

Nae Soo Kim

Jang Yeol Kim

Bo Ra Kim

Kwang Jae Lee

Yong Heui Cho

Sig Pyo Cheol

Nikolai Simonov

Ik Guen Choi

A method for reconstructing a dielectric image using electromagnetic waves, comprising: acquiring a measurement value of the electromagnetic waves; generating a matching system matrixes between the meshes; generating a smoothed dyadic Green's function matrix; generating an electromagnetic wave calculation value; calculating a misfit error between the acquired electromagnetic wave measurement value and the generated electromagnetic wave calculation value, and checking whether a change of the calculated misfit error satisfies a predetermined optimization determination condition; updating dielectric parameters at the meshes; and outputting a reconstructed dielectric image in the image reconstruction region.

Method and apparatus for reconstructing dielectric image using electromagnetic waves

A sensor includes a tank filled with a matching medium, a metal body configured to surround an image object received in the tank, and a plurality of apertures disposed at constant intervals inside the metal body, wherein when any one of the plurality of apertures radiates microwaves to the image object, remaining apertures receive scattering microwaves from the image object.

Sensor for microwave image

Provided are an antenna apparatus for linearly polarized diversity antennas in a radio frequency identification (RFID) reader, and a method of controlling the antenna apparatus. The antenna apparatus includes: a plurality of linearly polarized diversity antennas disposed to have different directions to one another; a switching unit connecting the linearly polarized diversity antennas to the RFID reader; and a controller controlling the switching unit to selectively activate the linearly polarized diversity antennas.

Antenna apparatus for linearly polarized diversity antenna in RFID reader and method of controlling the antenna apparatus

Provided is an apparatus for measuring a read range between a tag and a reader, which includes an electromagnetic anechoic chamber formed by connecting at least one unit cell in a row, the unit cell having an electromagnetic wave absorbent provided on an inner wall of each unit cell, an electromagnetic generation portion located at the unit cell at an end of the electromagnetic anechoic chamber and transmitting an electromagnetic wave through an antenna, and an electromagnetic measurement portion which measures a field strength of the electromagnetic wave transmitted from the electromagnetic generation portion using an electric field probe moving in the electromagnetic anechoic chamber.

Apparatus for measuring read range between RFID tag and reader

The present invention provides a broadband slot array antenna that can be implemented with lower cost by using a single dielectric layer and a metal layer, and makes easy to implement an active integrated antenna. The broadband slot antenna includes: a dielectric layer under which a microstrip feedline is formed; a ground formed on the dielectric layer and electromagnetically coupled with the microstrip antenna through a slot; and a reflection plane placed under the microstrip feedline in order to prevent board surface waves from being radiated and enhance antenna gain.

Broadband slot antenna and slot array antenna using the same

Growing community of inventors

Choongcheongbuk-Do, South Korea

Jong Moon Lee