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    • 31. 发明公开
    • Distributor, synthesizer and S/N enhancer
    • Verteiler,Koppler und Vorrichtung zurVergrösserungdes Signal-Rauschverhältnisses
    • EP0794615A1
    • 1997-09-10
    • EP97103899.7
    • 1997-03-07
    • MURATA MANUFACTURING CO., LTD.NIPPON HOSO KYOKAI
    • Okada, TakekazuShinmura, SatoruKanaya, FumioToba, AkiraNomoto, Toshihiro, Nippon Hoso Kyokai
    • H03H7/48H03H2/00
    • H03H2/001
    • An S/N enhancer (100) is provided which can be formed to be small in size and in which impedance matching can easily be achieved. The S/N enhancer (100) includes two magnetostatic wave elements (12a,12b). First to fourth transducers (20a, 22a,20b,22b) each in the shape of a single line are disposed on YIG thin films (16a,16b) of the magnetostatic wave elements (12a,12b) in parallel and spaced from one another. An input terminal (24) is connected to one end of the first transducer (20a). An attenuator (28a) is connected between the other end of the first transducer (20a) and one end of the third transducer (20b). A 180° shifter (38) and another attenuator (28b) are connected in series between one end of the second transducer (22a) and one end of the fourth transducer (22b). An output terminal (26) is connected to the other end of the fourth transducer (22b). The other ends of the second and third transducers (22a,20b) are respectively grounded.
    • 提供了可以形成为尺寸小并且可以容易地实现阻抗匹配的S / N增强器(100)。 S / N增强器(100)包括两个静磁波元件(12a,12b)。 静电波元件(12a,12b)的YIG薄膜(16a,16b)彼此平行且间隔设置,分别形成为单线形状的第一至第四传感器(20a,22a,20b,22b)。 输入端子(24)连接到第一换能器(20a)的一端。 衰减器(28a)连接在第一换能器(20a)的另一端和第三换能器(20b)的一端之间。 180度移位器(38)和另一衰减器(28b)串联连接在第二换能器(22a)的一端和第四换能器(22b)的一端之间。 输出端子(26)连接到第四换能器(22b)的另一端。 第二和第三换能器(22a,20b)的另一端分别接地。
    • 32. 发明公开
    • Electric field sensor
    • Fühlerfürelektrische Felder。
    • EP0682262A3
    • 1996-11-27
    • EP95107267.7
    • 1995-05-12
    • TOKIN CORPORATIONNIPPON HOSO KYOKAI
    • Toba, Yoshikazu, c/o Tokin CorporationKondo, Michikazu, c/o Tokin CorporationSato, Yoshiro, c/o Tokin CorporationHayeiwa, KazuhisaNaka, HisashiIshikawa, Tadasu
    • G01R29/08
    • G01R29/0885
    • An electric field sensor comprises an electric field sensor head (3) for varying an intensity of a propagating light beam in response to an electric field intensity of an input signal received by a reception antenna (1). The electric field sensor head (3) comprises an incident optical waveguide (9), two phase-shift optical waveguides (10) having a variable refractive index which varies in response to the electric field intensity, an outgoing optical waveguide (11), at least one modulation electrode (12) formed in the vicinity of at least one of the two phase-shift optical waveguides (19). The electric field sensor further comprises a resonator circuit (2) connected between the modulation electrode (12) and the reception antenna (1). The modulation electrode (12) has a thickness not smaller than 1 µm. The modulation electrode (12) may comprise a plurality of split electrodes split in a light propagating direction and capacitively coupled. The reception antenna (1) is preferably implemented by a low radiation resistance antenna.
    • 电场传感器包括用于响应于由接收天线(1)接收的输入信号的电场强度来改变传播光束的强度的电场传感器头(3)。 电场传感器头(3)包括入射光波导(9),具有根据电场强度变化的可变折射率的两个相移光波导(10),出射光波导(11),在 形成在两个相移光波导(19)中的至少一个附近的至少一个调制电极(12)。 电场传感器还包括连接在调制电极(12)和接收天线(1)之间的谐振电路(2)。 调制电极(12)的厚度不小于1μm。 调制电极(12)可以包括沿光传播方向分开并电容耦合的多个分裂电极。 接收天线(1)优选地由低辐射电阻天线实现。