Samsung Electro-mechanics Co., Ltd.

Korea Telecom

3rwave Co. Ltd.

Neumed Inc.

Mi Yeon Kim

Dae Hee Lee

Jin Hee Jung

Choong Sik Yoo

Duk Y Yoon

Young Min Boo

Yong Ju Ban

Ni Na Ha

Jang Su Kim

Su Mi Lim

Dong Hui Lee

Sang Kyu Choe

Ho Chol Kim

A modularization of a circulator and a directional coupler used in a wireless communication system comprises: a circulator; and a signal coupler, where the signal coupler does not have directivity by itself, and directivity of the circulator module is controlled by isolation characteristics of the circulator to improve electrical characteristics of a wireless communication system and miniaturize the wireless communication system by applying the electrical characteristics in common with a circulator to modularize the wireless communication system without implementation of a circuit of a directional coupler capable of sampling high-frequency signals.

Method for designing and manufacturing circulator module having function of directional coupler embedded therein

The present invention relates to a method for multi-step filtering a candidate object which is filtered by a minimum bounding rectangle (MBR); and, more particulary, to a method of multi-step filtering a candidate object by employing a minimum maximum point (MMP) filter to improve spatial query filtering process performance by refiltering the candidate objects, which are filtered by using a rotated minimum bounding rectangle (Rotated Minimum Bounding Rectangle) surrounding spatial objects during filtering process at a step of spatial query filtering and refining of spatial database, by using spatial filter, i.e., MMP filter.

Method for multi-step filtering spatious objects by utilizing MMP filter in spatial database system

A lead-free soldering material for soldering wires of electronic parts is disclosed. The lead-free soldering material is composed of in weight %: 3-4% of Ag, 2-5% of In, 6-14% of Bi and a balance of Sn, and the soldering material shows a superior solderability.

Lead-free soldering material having superior solderability

Growing community of inventors

Seoul, South Korea

Mi Yeon Kim