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:
Dec. 02, 2003
Filed:
May. 28, 2002
Shoji Nagumo, Kawasaki, JP;
Kengo Onaka, Yokohama, JP;
Takashi Ishihara, Machida, JP;
Jin Sato, Sagamihara, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
A surface mount type antenna includes a loop-shaped fed radiation electrode provided on a substrate, and a non-fed radiation electrode is arranged close to the fed radiation electrode with a gap provided therebetween. One end side of the non-fed radiation electrode is grounded, and the other end side is an open end. A signal is sent to the non-fed radiation electrode from the fed radiation electrode by electromagnetic coupling to perform a resonant operation. The fed radiation electrode and the non-fed radiation electrode generate a double-resonant state. The double resonance extends the frequency band. When the fed radiation electrode and the non-fed radiation electrode are provided on the substrate to define an antenna, the size of the antenna is greatly reduced.