公开(公告)号：US20050261036A1

公开(公告)日：2005-11-24

申请号：US11183009

申请日：2005-07-18

Applicant: Shu-ichi Sekine ,  Takayoshi Itoh ,  Yuji Iseki ,  Naoko Ono ,  Keiichi Yamaguchi ,  Hiroyuki Kayano ,  Akihiro Tsujimura ,  Kazuhiro Inoue ,  Noriaki Odachi ,  Yasushi Murakami

Inventor： Shu-ichi Sekine ,  Takayoshi Itoh ,  Yuji Iseki ,  Naoko Ono ,  Keiichi Yamaguchi ,  Hiroyuki Kayano ,  Akihiro Tsujimura ,  Kazuhiro Inoue ,  Noriaki Odachi ,  Yasushi Murakami

IPC: H01Q1/24 ,  H03H7/40 ,  H04B1/04 ,  H04B1/46

CPC classification number: H03H7/40 ,  H01Q1/242 ,  H04B1/0458

Abstract: In a radio equipment of portable type, the impedance of an antenna is optimized by adjusting a matching circuit which has the adjustment function and is connected to an antenna, based on a reflection phase sent back from the antenna, outputted from a reflection phase detector, and a current supplied to a transmitter-receiver which generates a transmitting signal.