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公开(公告)号：US5021790A
公开(公告)日：1991-06-04
申请号：US522581
申请日：1990-05-14
CPC分类号： G01S13/765 , G01S13/78 , G01S13/825 , G06K19/0723 , G06K7/0008 , G07C3/00 , G07C9/00111
摘要： A microwave data transmission apparatus adapted to transmit and receive information by microwaves, in which an identification tag is made smaller in size and lighter in weight to considerably improve the convenience in a setting operation for use in many applications. The apparatus can be applied for production control within a factory or can be used to recognize whether a person wearing an identification tag has entered or left a room.
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公开(公告)号：US4712111A
公开(公告)日：1987-12-08
申请号：US813535
申请日：1985-12-26
申请人： Tomozo Ohta , Kazutada Higashi , Hirohiko Yamamoto
发明人： Tomozo Ohta , Kazutada Higashi , Hirohiko Yamamoto
CPC分类号： H01Q25/001 , H01Q19/132
摘要： An antenna system includes a reflector which is a part of a paraboloid of revolution or parabolic cylinder, a primary radiator for clockwise circularly polarized wave, and a primary radiator for counterclockwise circularly polarized wave. The reflector is of geometrically asymmetrical shape to effect different reflection properties for clockwise and counterclockwise circular polarizations. The primary radiators are fixed at two different positions in the vicinity of the focus of the paraboloid reflector.
摘要翻译： 天线系统包括反转器，其是旋转抛物面抛物面抛物面的一部分，用于顺时针圆偏振波的主辐射器和用于逆时针圆偏振波的初级辐射器。 反射器具有几何不对称的形状，以实现顺时针和逆时针圆偏振的不同反射特性。 主辐射器固定在抛物面反射器焦点附近的两个不同位置。
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公开(公告)号：US4926182A
公开(公告)日：1990-05-15
申请号：US55363
申请日：1987-05-29
CPC分类号： G01S13/765 , G01S13/78 , G01S13/825 , G06K19/0723 , G06K7/0008 , G07C3/00 , G07C9/00111
摘要： A microwave data transmission apparatus adapted to transmit and receive information by microwaves, which the identification tag is made smaller in size and lighter in weight to considerably improve the convenience in setting operation for use in many applications, can be applied for the production control within the factory or the control for entering and leaving the room by a person having an identification tag.
摘要翻译： 一种微波数据传输装置，其适用于通过微波发送和接收信息，识别标签的尺寸更小，重量更轻，从而大大提高了许多应用中使用的设置操作的便利性，可应用于内部的生产控制 工厂或由具有识别标签的人进出房间的控制。
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公开(公告)号：US4890076A
公开(公告)日：1989-12-26
申请号：US183983
申请日：1988-04-20
申请人： Kazutada Higashi , Masamori Tokuda , Hiroshi Nakano , Tomozo Ohta
发明人： Kazutada Higashi , Masamori Tokuda , Hiroshi Nakano , Tomozo Ohta
CPC分类号： H03C1/60 , H03C7/027 , H03C2200/0033 , H03C2200/007
摘要： The SSB modulator according to the present invention is comprised of a driving voltage generator, a diode, a bias supply circuit, an impedance transformation circuit and an input/output terminal. The SSB modulator is arranged such that the impedance of the diode is changed by changing the driving voltage impressed across the diode, resulting in the mismatching of the impedance, which leads to generation of a reflected wave. Therefore, by changing the amplitude and the phase of the above-obtained reflected wave, SSB modulation is effected. Accordingly, the SSB modulator of the present invention, requiring no particular side band filter, is compact in size, light in weight and low in manufacturing cost, with a simple structure of the circuit.
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