公开(公告)号：US4389624A

公开(公告)日：1983-06-21

申请号：US251967

申请日：1981-04-03

申请人： Yukichi Aihara ,  Sadahiko Yamashita

发明人： Yukichi Aihara ,  Sadahiko Yamashita

IPC分类号： H01P1/202 ,  H01P7/04

CPC分类号： H01P7/04

摘要： A coaxial resonator comprising an outer conductor with closed and open ends, an inner conductor concentrically disposed in the outer conductor to establish a short circuit at the closed end and an open circuit at the open end, and a dielectric member mounted in the open circuit between the outer and inner conductors. An electrode is connected to the open circuit end of the inner conductor with a spacing from the dielectric member. A conductive plate, having a smaller surface area than that of the electrode but larger than the transverse cross-sectional area of the inner conductor, is provided between the dielectric member and the electrode. The dimensions of the conductive plate is appropriately chosen to accommodate frequency variations which might occur as a result of a connection with an external circuit.

摘要翻译： 一种同轴谐振器，包括具有闭合和开放端的外部导体，同心地设置在外部导体中的内部导体，以在封闭端处建立短路，并在开口端形成开路;以及电介质构件，其安装在开路之间 外导体和内导体。 电极与内部导体的开路端连接，与电介质构件间隔开。 在电介质构件和电极之间设置导电板，其表面面积小于电极的表面积，但大于内导体的横截面积。 适当地选择导电板的尺寸以适应由于与外部电路的连接而可能发生的频率变化。

公开(公告)号：US4340975A

公开(公告)日：1982-07-20

申请号：US195314

申请日：1980-10-08

申请人： Hiroshi Onishi ,  Sadahiko Yamashita

发明人： Hiroshi Onishi ,  Sadahiko Yamashita

IPC分类号： H03B1/00 ,  H03B5/18 ,  H03D7/14 ,  H03D7/16 ,  H03D9/06 ,  H03D7/02 ,  H04B1/26 ,  H04N5/44

CPC分类号： H03D7/161 ,  H03D9/0633 ,  H03B2201/0208 ,  H03B2201/0225 ,  H03B5/1823 ,  H03D2200/0017 ,  H03D2200/0027 ,  H03D7/1408

摘要： In a double superheterodyne tuner for receiving TV channel signals, a frequency in a range defined between 2520 and 2700 MHz is selected as the first intermediate frequency, while the first intermediate frequency is obtained by subtracting a desired channel frequency from a first local oscillator frequency. The tuner comprises first and second mixing circuits respectively used for effecting frequency conversion, where each of these mixing circuits has parallel coupled lines so that each mixing circuit operates as a balance-to-unbalance transformer. The second mixing circuit further comprises a short-circuit line placed between the parallel coupled lines. The tuner also comprises a band pass filter having a band width less than 5 MHz, which selectively transmits the first intermediate frequency signal from the first mixing circuit.

摘要翻译： 在用于接收TV信道信号的双重超外差调谐器中，选择在2520和2700MHz之间的范围内的频率作为第一中频，而通过从第一本机振荡器频率减去所需信道频率获得第一中频。 调谐器包括分别用于实现频率转换的第一和第二混频电路，其中这些混频电路中的每一个具有并联耦合线，使得每个混频电路作为平衡不平衡变压器工作。 第二混合电路还包括放置在并联耦合线之间的短路线。 调谐器还包括带宽小于5MHz的带通滤波器，其选择性地传输来自第一混频电路的第一中频信号。

公开(公告)号：US4016568A

公开(公告)日：1977-04-05

申请号：US537767

申请日：1974-12-31

申请人： Mistuo Makimoto ,  Sadahiko Yamashita ,  Yoshiharu Yano ,  Junichi Yamamoto

发明人： Mistuo Makimoto ,  Sadahiko Yamashita ,  Yoshiharu Yano ,  Junichi Yamamoto

IPC分类号： B60R21/00 ,  G01S13/58 ,  G01S9/44

CPC分类号： G01S13/585

摘要： A beam of diverging electromagnetic radiation of a predetermined frequency is transmitted to a target and the doppler shift of frequency of an echo due to relative movement of the target and a point of reception is detected conventionally by combining the frequency of the echo and the predetermined frequency. The number of cycles within the detected doppler shift frequency is counted to provide a delay to initiate measurement of doppler shift at a preselected angle of incidence of the echo. The effective area of measurement is thus restricted to a narrow region of the beam with the resultant high degree of precision.

摘要翻译： 将预定频率的发散电磁辐射束发射到目标，并且通过将回波的频率和预定频率组合来检测由于目标和接收点的相对移动引起的回波频率的多普勒频移 。 在检测到的多普勒频移中的周期数被计数以提供延迟以在回波的预选入射角度开始测量多普勒频移。 因此，有效的测量区域被限制在光束的窄区域，从而产生高精度。