公开(公告)号：US06421530B1

公开(公告)日：2002-07-16

申请号：US08933848

申请日：1997-09-19

申请人： Hisashi Adachi ,  Hiroaki Kosugi ,  Kaoru Ishida ,  Hiroshi Haruki ,  Junichi Yasuno ,  Kazuhiko Ikeda

发明人： Hisashi Adachi ,  Hiroaki Kosugi ,  Kaoru Ishida ,  Hiroshi Haruki ,  Junichi Yasuno ,  Kazuhiko Ikeda

IPC分类号： H04B140

CPC分类号： H04B1/403

摘要： The present invention concerns a radio circuit including a local oscillator, a first receive frequency converter, a frequency divider and a demodulator. A receive signal and an output of the local oscillator are input to the first receive frequency converter. The receive signal is converted into a first intermediate signal by the first receive frequency converter, and the first intermediate frequency signal is input to the demodulator. The output of the local oscillator is frequency-divided by the frequency divider and also input to the demodulator. The signal converted into the first intermediate frequency is demodulated into a baseband signal by the demodulator.

摘要翻译： 本发明涉及包括本地振荡器，第一接收频率转换器，分频器和解调器的无线电电路。 接收信号和本地振荡器的输出被输入到第一接收变频器。 接收信号由第一接收频率转换器转换成第一中间信号，第一中频信号被输入到解调器。 本地振荡器的输出由分频器分频，并输入到解调器。 转换成第一中频的信号由解调器解调为基带信号。

公开(公告)号：US5901345A

公开(公告)日：1999-05-04

申请号：US056446

申请日：1998-04-06

申请人： Hikaru Ikeda ,  Hiroaki Kosugi ,  Kaoru Ishida ,  Nobuo Fuse ,  Hideki Yagita ,  Hiroshi Haruki

发明人： Hikaru Ikeda ,  Hiroaki Kosugi ,  Kaoru Ishida ,  Nobuo Fuse ,  Hideki Yagita ,  Hiroshi Haruki

IPC分类号： H03F3/24 ,  H03F3/21 ,  H03F3/60 ,  H04B1/04 ,  H03F3/68

CPC分类号： H03F3/211 ,  H03F3/604

摘要： The output of a digital modulator is put into a power amplifying device, is distributed into n pieces in an n-power divider in the power amplifier, passes through n input phase shifters differing individually in the phase change amount, is amplified by n power amplifiers, passes through n output phase shifters to match the phase of n signals, is combined in an n-power combiner, and is issued from an output terminal to a phase shifter, and the output of the phase shifter is issued to a transmission antenna. Herein, the phase value of the phase shifter is determined so as to extend the region of the output load impedance for satisfying the specific value of unwanted radiation, and so that the output load impedance range of the load impedance of the power amplifier may be optimize to the impedance change range of the trans missionantenna, thereby eliminating the isolator and presenting a transmitting device of a portable wireless system realizing smaller size, higher performance, and lower cost of portable wireless system.

摘要翻译： 数字调制器的输出放入功率放大装置中，在功率放大器的n功率分配器中分配成n个片段，通过相位变化量不同的n个输入移相器，由n个功率放大器 ，通过n个输出移相器以匹配n个信号的相位，被组合在n个功率组合器中，并且从输出端子发送到移相器，并且将移相器的输出发送到发送天线。 这里，确定移相器的相位值，以便扩大输出负载阻抗的区域以满足不需要的辐射的特定值，并且使得功率放大器的负载阻抗的输出负载阻抗范围可以被优化 到传输天线的阻抗变化范围，从而消除了隔离器并呈现便携式无线系统的发送装置，实现便携式无线系统的更小的尺寸，更高的性能和更低的成本。