The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 24, 2012
Filed:
Feb. 04, 2008
Byung Hoon Ryou, Seoul, KR;
Won MO Sung, Siheung-si, KR;
Dong Ryul Shin, Daegu, KR;
Jeong Pyo Kim, Seoul, KR;
Chang Hyun Park, Incheon, KR;
Byung Hoon Ryou, Seoul, KR;
Won Mo Sung, Siheung-si, KR;
Dong Ryul Shin, Daegu, KR;
Jeong Pyo Kim, Seoul, KR;
Chang Hyun Park, Incheon, KR;
EMW Co., Ltd., Incheon, KR;
Abstract
The present invention provides an RF switch, including a diode adapted to operate as a switch when a control current is applied thereto, a first CRLH transmission line of a Φ degree phase, which provides one signal transfer path from a terminalto a terminalwhen the diode is shorted due to application of a control current, and a second CRLH transmission line of a Φ-180 degree phase, which has a 180 degree phase difference from that of the first CRLH transmission line and provides the other signal transfer path from the terminalto the terminal. The present invention provides an RF switch having a broad-band characteristic by employing a CRLH transmission line. More specifically, the present invention provides a ring-shaped RF switch, which has a broad-band characteristic and can also be miniaturized at a low frequency band, by employing a CRLH transmission line having a 180 degree phase difference in a broad band.