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:
Oct. 09, 2001
Filed:
Apr. 20, 1999
Applicant:
Inventor:
Jong-Myung Kim, Kyongsangbuk-do, KR;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 1/38 ;
U.S. Cl.
CPC ...
H04B 1/38 ;
Abstract
A portable telephone with an extendible antenna automatically switches an antenna mode according to a received signal strength. The portable telephone measures an RSSI value while a call is processed in an internal antenna mode where the antenna is retracted, to compare the measured RSSI value with a threshold value. If the RSSI value is lower than the threshold value, the antenna is extended, thereby switching the antenna mode to an external antenna mode. In the meantime, if the call is terminated, the antenna is retracted, switching the antenna mode back to the internal antenna mode.