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1. 发明授权

US5173711A Microstrip antenna for two-frequency separate-feeding type for circularly polarized waves 失效
标题翻译：用于圆偏振波的双频分离馈电型微带天线
公开(公告)号：US5173711A
公开(公告)日：1992-12-22
申请号：US906030
申请日：1992-06-26
申请人： Kazunori Takeuchi , Masayuki Yasunaga , Takayasu Shiokawa
发明人： Kazunori Takeuchi , Masayuki Yasunaga , Takayasu Shiokawa
IPC分类号： H01Q5/00 , H01Q5/42 , H01Q9/04 , H01Q21/06
CPC分类号： H01Q21/065 , H01Q5/42 , H01Q9/0421
摘要： A microstrip antenna of two-frequency separate-feeding type for circularly polarized waves is disclosed, in which four radiation conductors are disposed on a dielectric plate mounted on a conducting ground plane and each radiation conductor has its marginal portion partly short-circuited via a short-circuiting conductor to the conducting ground plane and is supplied at its feeding point with power via a feeder passing through the conducting ground plane and the dielectric plate. The four radiation conductors are composed of two pairs of radiation conductors of different sizes adjusted so that two desired frequencies can simultaneously be used for transmission and for reception, respectively, the conductors of each pair being arranged to generate a circularly polarized wave.
摘要翻译：公开了一种用于圆偏振波的双频分离馈电型微带天线，其中四个辐射导体设置在安装在导电接地平面上的电介质板上，并且每个辐射导体的边缘部分经由短路部分短路电导体连接到导电接地平面，并通过馈电线通过导电接地平面和电介质板在其馈电点供电。四个辐射导体由两对不同尺寸的辐射导体对组成，这两对辐射导体被调整为使得两个所需频率分别同时用于传输和接收，每对导体被布置成产生圆偏振波。

2. 发明授权

US5170176A Quadrifilar helix antenna 失效
标题翻译： QUADRIFILAR HELIX天线
公开(公告)号：US5170176A
公开(公告)日：1992-12-08
申请号：US659657
申请日：1991-02-25
申请人： Masayuki Yasunaga , Takayasu Shiokawa
发明人： Masayuki Yasunaga , Takayasu Shiokawa
IPC分类号： H01Q11/08
CPC分类号： H01Q11/08
摘要： A quadrifilar helix antenna according to the present invention incorporates four helix conductors wound around an axis in the same winding direction. Each of the helix conductors has a linear conductor which is parallel to its axis at either end or both ends of the helix conductor. The present antenna reduces the effect of multipath fading due to sea-surface reflection in mobile satellite communications.
摘要翻译：根据本发明的四极螺旋天线包括绕相同卷绕方向的轴线缠绕的四个螺旋导体。每个螺旋导体具有在螺旋导体的任一端或两端平行于其轴线的线性导体。本天线减少了移动卫星通信中由于海面反射引起的多径衰落的影响。

3. 发明授权

US5204981A Interference elimination system 失效
标题翻译：干扰消除系统
公开(公告)号：US5204981A
公开(公告)日：1993-04-20
申请号：US663404
申请日：1991-03-01
申请人： Yoshio Karasawa , Masayuki Yasunaga , Hisato Iwai
发明人： Yoshio Karasawa , Masayuki Yasunaga , Hisato Iwai
IPC分类号： H04B7/08 , H04B7/155 , H04L1/06
CPC分类号： H04B7/086
摘要： Accordingly to the present invention, when an incidence angle of a direct wave or a satellite elevation angle reaches a predetermined value, signals from two (or more) antennas, which are disposed at positions where variations in the field intensities of radio waves recevied by the two antennas are negatively correlated (i.e. when the received signal level of one of them is low, the received signal level of the other is high) or uncorrelated (i.e. the variations are not related to each other), are successively or discretely switched at a suitable switching period, by which burst-like errors are spread with time to perform the de-interleave or interleave function in decoding transmitted signals.
摘要翻译：根据本发明，当直接波或卫星仰角的入射角达到预定值时，来自两个（或更多个）天线的信号被设置在由该天线接收的无线电波的场强度的变化的位置处两个天线是负相关的（即当其中一个的接收信号电平低，另一个的接收信号电平高）或不相关（即，变化彼此不相关）时，在一个合适的切换周期，突发式错误随时间扩展以在解码发送信号中执行去交织或交织功能。

4. 发明授权

US4893350A Interference cancellation system 失效
标题翻译：干扰消除系统
公开(公告)号：US4893350A
公开(公告)日：1990-01-09
申请号：US196205
申请日：1988-03-14
申请人： Kenichi Minamisono , Masayuki Yasunaga , Fumio Watanbe , Noboru Baba
发明人： Kenichi Minamisono , Masayuki Yasunaga , Fumio Watanbe , Noboru Baba
IPC分类号： H04B1/12
CPC分类号： H04B1/126
摘要： An interference cancellation system has a combiner which removes an undesired component from a main signal including both a desired signal and an undesired signal received by a main antenna. A power sensor measures output power of a main signal. A weight control circuit is coupled with an output of the power sensor. An auxiliary antenna receives an undesired signal. A variable complex weight control circuit adjusts an undesired signal from the auxiliary antenna according to the output of the weight control circuit to provide an input signal to the combiner. The variable complex weight control circuit operates so that the output power becomes a minimum.

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