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:
Jul. 10, 2001
Filed:
Dec. 24, 1998
Seung-Gyun Bae, Kumi, KR;
Abstract
An antenna circuit for a portable telephone is provided. The antenna circuit prevents an increase in the standing wave ratio (SWR) when the portable telephone antenna comes in contact with the human body. The antenna circuit includes: an RF (Radio Frequency) module having an impedance of about 50&OHgr;. An antenna having an impedance of about 450 to 500&OHgr; radiates an RF signal output from the RF module into the air and outputs an RF signal captured from the air to the RF module. A matching circuit connected between the RF module and the antenna matches an impedance characteristic of the RF module with an impedance characteristic of the antenna. The matching circuit includes an inductor having an inductance of about 24 mH connected between an output of the RF module and the antenna and a capacitor having a capacitance of about 1 pF connected between the antenna and a ground, the capacitor being coupled in parallel to the inductor.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile