公开(公告)号：EP1351388A4

公开(公告)日：2009-06-17

申请号：EP01900275

申请日：2001-01-09

申请人： MITSUBISHI ELECTRIC CORP

发明人： HIEDA MORISHIGE ,  MIYAGUCHI KENICHI ,  MORI KAZUTOMI ,  KASAHARA MICHIAKI ,  TAKAGI TADASHI ,  IKEMATSU HIROSHI ,  TAKEUCHI NORIO ,  NAKAGURO HIROMASA ,  INAMI KAZUYOSHI

IPC分类号： H03H11/18 ,  H03H11/20 ,  H03H7/20

CPC分类号： H03H11/18 ,  H03H11/20

摘要： The invention provides a small phase shifter and a small multibit phase shifter, in which a filter including a capacitor formed during pinchoff of a FET is used to shift phases depending on the ON/OFF operation of the FET. The phase shifter comprises a first FET connected at its drain and source electrodes with an input terminal and an output terminal; a second FET connected at either one of its drain and source electrodes with the source of the first FET and grounded at the other through a first inductor; and a third FET connected at either one of its drain and source electrodes with the drain of the first FET and grounded at the other through a second inductor.

公开(公告)号：EP1679806A4

公开(公告)日：2006-10-25

申请号：EP03770016

申请日：2003-10-30

申请人： MITSUBISHI ELECTRIC CORP

发明人： TAKEUCHI NORIO ,  NAITOU IZURU ,  SAKAI EIICHI ,  SHIMAWAKI YUTAKA

IPC分类号： H04B7/155 ,  H01Q1/28 ,  H01Q1/42 ,  H01Q3/26 ,  H04B7/185

CPC分类号： H04B7/18506 ,  H01Q1/28 ,  H01Q1/421 ,  H04B7/18508 ,  H04B7/1853 ,  H04B7/18532

摘要： A mobile satellite communication system performing communication with a satellite by means of an antenna with a radome mounted on a mobile, e.g. an aircraft, in which loss and distortion of polarization characteristics due to transmission through the radome can be compensated for in the antenna. Since variable phase shifters (9a, 9b) and variable attenuators (19a, 19b), and variable phase shifters (10a, 10b) and variable attenuators (20a, 20b) are controlled integrally for each system, and entire irradiation power EIRP from the antenna is also controlled optimally by means of a common attenuator (21) inserted independently of the variable attenuators (19a, 19b), radome correction and EIRP control can be realized simultaneously through a relatively simple circuit.

摘要翻译： 移动卫星通信系统通过安装在移动电话上的天线罩等天线与卫星进行通信。 其中由天线罩传输导致的偏振特性的损失和失真可以在天线中得到补偿。 由于对于每个系统一体地控制可变移相器（9a，9b）和可变衰减器（19a，19b）和可变移相器（10a，10b）和可变衰减器（20a，20b），并且来自天线的整个照射功率EIRP 也通过与可变衰减器（19a，19b）无关地插入的公共衰减器（21）进行最佳控制，可以通过相对简单的电路同时实现天线罩校正和EIRP控制。