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    • 11. 发明授权
    • Detector for indicating frequency deviation peaks
    • 用于指示频率偏差峰值的检测器
    • US4653116A
    • 1987-03-24
    • US693800
    • 1985-01-23
    • Heinz LindenmeierErnst MannerGerhard Flachenecker
    • Heinz LindenmeierErnst MannerGerhard Flachenecker
    • H03D3/00H04B1/10H04B17/00
    • H04B1/1027H03D3/00
    • A detector for indicating reception disturbances during ultrashort wave broadcast reception by demodulating of intermediate frequency signals has a frequency modulated demodulator with a demodulation characteristic line formed so that a controlling region within which the output signal increases with increasing frequency deviation from a carrier frequency extends advantageously over the entire band width of the ultrashort wave intermediate frequency channel and is significantly greater than the maximum frequency deviation of the intermediate frequency carrier modulated with the basic band signal in the frequency, and the output signal of the frequency demodulator is supplied to an evaluating circuit at whose output the exceeding of a predetermined frequency disturbance deviation threshold is indicated by a logic signal.
    • 用于通过解调中频信号来指示在超短波广播接收期间的接收干扰的检测器具有频率调制解调器,其具有形成的解调特性线,使得其中输出信号随着与载波频率偏差的增加而增加的控制区域有利地超过 超短波中频通道的整个带宽,并且明显大于用频率中的基本频带信号调制的中频载波的最大频率偏差,并且频率解调器的输出信号被提供给评估电路 其输出超过预定频率干扰偏差阈值由逻辑信号指示。
    • 12. 发明授权
    • Multiple-transmission-channel active antenna arrangement
    • 多传输通道有源天线装置
    • US3942119A
    • 1976-03-02
    • US446533
    • 1974-02-27
    • Hans Heinrich MeinkeHeinz LindenmeierFritz LandstorferGerhard Flachenecker
    • Hans Heinrich MeinkeHeinz LindenmeierFritz LandstorferGerhard Flachenecker
    • H03H7/46H01Q1/00H03H11/34H04B1/18H01Q1/50
    • H03H11/346
    • An antenna has two output terminals and is operative for receiving electromagnetic radiation and converting the same into electrical signals appearing across the two antenna output terminals. There are provided a first and a second transmission channel, each having a respective input comprised of a pair of input terminals, and respectively operative for transmitting electrical signals having frequencies lying in a predetermined first frequency range and in a predetermined higher second frequency range, one of the input terminals of the first channel being connected to one of the two antenna output terminals. A transformer includes a primary winding connecting the other of the input terminals of the first channel to the other of the two antenna output terminals. The transformer further includes a secondary winding connected across the two input terminals of the second transmission channel. The transformer is operative when the frequency of the electrical signal across the antenna output terminals is in the aforementioned first range for stepping down the input impedance of the second channel as reflected into the circuit of the primary winding to a value lower than the value of the input impedance of said first transmission channel at such frequency.
    • 天线具有两个输出端子,并且用于接收电磁辐射并将其转换成跨越两个天线输出端子出现的电信号。 提供了第一和第二传输信道,每个传输信道具有包括一对输入端的相应输入,并且分别用于发送具有处于预定的第一频率范围和预定的较高的第二频率范围的频率的电信号,一个 的第一通道的输入端子连接到两个天线输出端子之一。 变压器包括将第一通道的另一个输入端子连接到两个天线输出端子中的另一个的初级绕组。 变压器还包括连接在第二传输通道的两个输入端上的次级绕组。 当跨越天线输出端子的电信号的频率处于上述第一范围内时,变压器工作,以将第一通道的电路中反射的第二通道的输入阻抗降低到低于 在这种频率下所述第一传输信道的输入阻抗。