Electronics and Telecommunications Research Institute

Han-Phil Rhyu

Byung-Je Lee

Jong-Suk Chae

Cheol-Sig Pyo

Gil-Young Choi

Jae-Ick Choi

Hae-Won Son

Won-Kyu Choi

Chan-Soo Shin

Byung-Chan Kim

Byung-Woon Jung

Byung-Gil Yu

Sung-Jun Heo

A multi-band internal antenna includes a top patch defining a first loop that defines a space therein and a first opening; a stub provided within the space defined by the first loop; a bottom patch provided below the top patch and having a first section and a second section connected to a feeder part and a shorting part, respectively, the bottom patch defining a second loop and second and third openings, the second and third openings being provided on opposing sides of the second loop so that the first and second sections of the bottom patch are separated from each other; and a first connecting part and a second connecting part connecting a first portion and a second portion of the top patch, respectively, to the first section and the second section of the bottom patch to transmit a signal from the bottom patch to the top patch.

Multi-band internal antenna of symmetry structure having stub

Provided is an antenna for a Radio Frequency Identification (RFID) reader using an electrical loop. It includes an upper metal plate which functions as a radiator; a lower metal plate which is disposed apart from the upper metal plate by a predetermined distance and functions as a radiator; a ground plate disposed apart from the lower metal plate by a predetermined distance; and a feeding probe disposed at the center of the upper and lower metal plates. The antenna can perform radiation parallel to the earth's surface including other directions. Therefore, it is suitable for an RFID reader which recognizes an RFID tag attached in parallel to the earth's surface. The electrical loop antenna can control impedance matching, resonance frequency, antenna gain, and radiation pattern according to the distance between metal plates, size of the metal plates, thickness of a feeding probe, and how the metal plates are arranged.

Electrical loop antenna with unidirectional and uniform current radiation source

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Seoul, South Korea

Han-Phil Rhyu