Electronics and Telecommunications Research Institute

Tae Jin Chung

Myung Sun Song

Woo Jin Byun

Min Soo Kang

Kwang Seon Kim

Jae Ick Choi

Jung Bin Kim

Soon Young Eom

Bong-Su Kim

Bong Su Kim

Joung Myoun Kim

A contactless cardiopulmonary signal estimation method and apparatus are provided. A cardiopulmonary signal estimation apparatus may estimate a cardiopulmonary signal of a user from a heartbeat signal and a respiratory signal of the user in response to movement of a chest based on a cardiopulmonary exercise of the user.

Contactless cardiopulmonary signal estimation method and apparatus

A slot antenna having stubs is provided, in which a strip transmission line for transmitting a transverse electromagnetic mode (TEM) signal is formed by using a multi-layered substrate, and a plurality of slots are used for the strip transmission line. Thus, an omnidirectional radiation pattern is obtained, and the directivity of the slot antenna is improved.

Slot antenna with stubs

Provided are a mixer and a transceiver having the mixer. The mixer includes: an local oscillation (LO) differential signal generator converting an input LO signal into a differential signal; and a mixing unit receiving the LO differential signal as a first input and a first signal having a first frequency as a second input and performing differential amplification on the LO differential signal and the first signal to output a second signal having a second frequency.

Mixer and transceiver having the mixer

Growing community of inventors

Daejeon, South Korea

Tae Jin Chung