专利名称：COMMUNICATION APPARATUS AND
PORTABLE COMMUNICATION TERMINALUSING THE SAME
发明人：JIROU UCHIYAMA,SHIGEKI
SAKURAI,MASASHI YAMAGA
申请号：US13347340申请日：20120110
公开号：US20120105209A1公开日：20120503
专利附图：
摘要：When commonly using a receiving antenna and a transmitting antenna having
mutually opposing characteristics, the present invention makes it possible to commonlyuse the antennas without deteriorating the characteristics of both antennas. In acommunication apparatus including both of an RF-ID function circuit to performcontactless communication with an external reader/writer device and a reader/writerfunction circuit to perform contactless communication with an external RF-ID, there isdisposed a common antenna shared therebetween. And, a transmitting and receivingresonance frequency switching circuit is connected in parallel to the common antenna;when selecting each function, a resonance frequency is automatically changed by thetransmitting and receiving resonance frequency switching circuit.
申请人：JIROU UCHIYAMA,SHIGEKI SAKURAI,MASASHI YAMAGA
地址：Tokyo JP,Tokyo JP,Tokyo JP
国籍：JP,JP,JP
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