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    • 4. 发明申请
    • Ultralow temperature low noise amplification apparatus
    • 超低温低噪声放大装置
    • US20050128025A1
    • 2005-06-16
    • US10968349
    • 2004-10-20
    • Takashi UchidaMasaki SutoNoriyuki Kagaya
    • Takashi UchidaMasaki SutoNoriyuki Kagaya
    • H03F1/26H01B12/02H01P1/00H03F3/19H03F3/193H03F3/68H04B1/18
    • H03F3/68H03F1/26H03F3/19H03F2200/372
    • An ultralow-temperature low-noise amplification apparatus of high sensitivity which realizes a small size, a light weight, a low electric power consumption and a low price. As the insertion loss caused by high-frequency cables and a superconducting filter installed as a first signal transmitting device before a first-stage amplifier is most responsible for any increase in the noise figure of the ultralow-temperature low-noise amplification apparatus as a whole, they are formed from a material causing only a small insertion loss to reduce the noise figure of the apparatus effectively. A high-frequency cable forming a third signal transmitting device not affecting the noise figure of the apparatus substantially is formed from a material of low thermal conductivity, so that it is possible to prevent any external heat from entering a heat-insulating container through an output connector to hold the interior of the container steadily at a low temperature and thereby keep the noise figure of the apparatus at a low level.
    • 具有高灵敏度的超低温低噪声放大装置,实现体积小,重量轻,功耗低,价格低廉。 由于高频电缆引入的插入损耗和在第一级放大器之前安装作为第一信号传输装置的超导滤波器对于超低温低噪声放大装置的整体噪声系数的任何增加而言是最重要的 它们由仅引起小的插入损耗的材料形成,以有效地降低设备的噪声系数。 形成不影响设备的噪声系数的第三信号传输装置的高频电缆基本上由导热性低的材料形成,使得可以防止外部热量通过输出进入绝热容器 连接器,以在低温下稳定地保持容器的内部,从而将设备的噪声系数保持在低水平。
    • 5. 发明授权
    • Amplifier apparatus and method for controlling a local oscillator frequency based on the detected temperature of if bandpass filters
    • 用于根据检测到的带通滤波器的温度来控制本地振荡器频率的放大器装置和方法
    • US06731919B2
    • 2004-05-04
    • US09973691
    • 2001-10-11
    • Takashi UchidaMasaki SutoShoji FujimotoJunetsu UrataHidefumi Ito
    • Takashi UchidaMasaki SutoShoji FujimotoJunetsu UrataHidefumi Ito
    • H04B700
    • H04B1/0475
    • Disclosed is an amplifier apparatus that corrects mismatching of the filter transmission characteristic due to a change in the temperature of the amplifier apparatus itself and thereby stably amplifies the high-frequency signal. The amplifier apparatus converts a signal to be processed into one having an intermediate frequency band to thereby execute amplification processing. It comprises a local oscillator 31 the oscillation frequency of that can be altered, a first frequency converter 13 that converts the signal by the use of the oscillation frequency from the local oscillator into an intermediate frequency, a first band pass filter 14 that band-limits the signal having the intermediate, an amplifier 15 that amplifies the signal of the intermediate frequency that has passed therethrough, a second band pass filter 16 that band-limits the signal of the intermediate frequency that has been output therefrom, a second frequency converter 17 that converts the signal of the intermediate frequency that has passed therethrough into the original frequency by the use of the local-oscillation frequency, a temperature sensor 32 that detects the temperature of each of the first and second filters 14, 16, and a controller 33 that alters the oscillation frequency of the local oscillator 31 in correspondence with the detected temperature and thereby stabilizes the transmission characteristic of each of the first and second filters irrespective of the change in the temperature.
    • 公开了一种放大器装置,其校正由于放大器装置本身的温度变化引起的滤波器传输特性的不匹配,从而稳定地放大高频信号。 放大器装置将要处理的信号转换为具有中频带的信号,从而执行放大处理。 它包括可以改变其振荡频率的本地振荡器31,通过使用振荡频率将信号从本地振荡器转换为中频的第一频率转换器13,限制频带的第一带通滤波器14 具有中间信号的放大器15,放大已经通过的中频信号的放大器15,限制从其输出的中频信号的第二带通滤波器16,第二频率转换器17, 通过使用本地振荡频率将已经过去的中频的信号转换成原始频率,检测第一和第二滤波器14,16中的每一个的温度的温度传感器32和控制器33, 根据检测到的温度改变本地振荡器31的振荡频率,从而使传输稳定 无论温度的变化如何,第一和第二滤光器的每一个都具有特征。
    • 6. 发明授权
    • Predistortion type distortion compensation apparatus
    • 预失真型失真补偿装置
    • US06925106B2
    • 2005-08-02
    • US09880958
    • 2001-06-15
    • Masato HoraguchiNaoki HongoTakashi UchidaMasaki SutoToshio Takada
    • Masato HoraguchiNaoki HongoTakashi UchidaMasaki SutoToshio Takada
    • H03F1/32H04B1/04H04B1/707H04J13/00H04L27/30
    • H03F1/3247H03F1/3282H03F2200/102H03F2201/3233
    • To update the control value to a value of higher precision in a predistortion type distortion compensation apparatus for compensating the distortion occurring in an amplifier for amplifying an input signal by the control using a control value corresponding to the level of the input signal.Distortion generating means (1) generates distortion in an input signal, input signal level detecting means (3) detects the level of the input signal, distortion control means (4) controls the distortion generated by the distortion generating means 1 by using a control value corresponding to the level of the detected input signal, distortion component level detecting means (7) detects the level of distortion component contained in the amplified signal issued from the amplifier (2), integrating means K1 to KN integrate the level of the distortion component detected at every level of the detected input signal, and control value updating means (10) updates the control value corresponding to the level so that the integration result at every level of the input signal may be small.
    • 在预失真型失真补偿装置中,通过使用与输入信号的电平相对应的控制值进行控制来补偿放大器放大输入信号的失真的预失真型失真补偿装置,将控制值更新为更高的精度值。 失真产生装置(1)在输入信号中产生失真,输入信号电平检测装置(3)检测输入信号的电平,失真控制装置(4)通过使用控制值来控制失真发生装置1产生的失真 对应于检测到的输入信号的电平,失真分量电平检测装置(7)检测从放大器(2)发出的放大信号中包含的失真分量的电平,积分装置K 1至K N将失真分量 在检测到的输入信号的各个级别检测到,并且控制值更新装置(10)更新与电平相对应的控制值,使得输入信号的每个级别的积分结果可能较小。