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    • 2. 发明授权
    • Pre-distortion apparatus and method thereof
    • 预失真装置及其方法
    • US06724831B1
    • 2004-04-20
    • US09438131
    • 1999-11-10
    • Tsuyoshi HasegawaToru Maniwa
    • Tsuyoshi HasegawaToru Maniwa
    • H04K102
    • H03F1/3258H03F1/3294H04L27/368
    • In order to linearize the input/output characteristic of a power amplifier, a pre-distortion is performed using a pre-distortion function obtained from the inverse function of the input/output characteristic, in which the inclination of the highly linear low power part of this input/output characteristic is maintained. When the pre-distortion function is digitized and stored in a table, a differential between the pre-distortion function and a function of y=x is obtained, and a function table indicating this differential is stored. Since the gently inclined part of the pre-distortion function equals a function y=x, it is sufficient if only the difference between the input signal and function y=x is digitized, thereby realizing the reduction of the quantization error.
    • 为了使功率放大器的输入/输出特性线性化,使用从输入/输出特性的反函数获得的预失真函数来执行预失真,其中高线性低功率部分的倾斜度 该输入/输出特性得以维持。 当预失真功能被数字化并存储在表中时,获得预失真功能与y = x的函数之间的差分,并且存储指示该差分的功能表。 由于预失真函数的轻度倾斜部分等于函数y = x,所以只要将输入信号与函数y = x之间的差分数字化就足够了,从而实现量化误差的减小。
    • 3. 发明申请
    • Superconductive filter module, superconductive filter assembly and heat insulating type coaxial cable
    • 超导滤波器模块,超导滤波器组件和隔热型同轴电缆
    • US20050113258A1
    • 2005-05-26
    • US11024990
    • 2004-12-29
    • Manabu KaiKazunori YamanakaTsuyoshi HasegawaToru Maniwa
    • Manabu KaiKazunori YamanakaTsuyoshi HasegawaToru Maniwa
    • H01B1/00H01P1/205H01P7/04
    • H01P1/202H01P1/205H01P1/30H01P7/04Y10S505/70Y10S505/701Y10S505/866
    • The present invention relates to superconductive filter technology. According to the arrangement of the superconductive filter (1), a columnar resonating member (23) having a superconductive material formed on the surface thereof is attached at one of its ends thereof to an inner wall (22) of a filter housing (21) so that a space is interposed between the columnar resonating member and each of connectors (27a, 27b) which are connectable to a signal input/output cables (5a, 5b), respectively. According to this arrangement, heat conduction from the outside can be suppressed as far as possible, and the superconductive condition can be created with stability, with the result that a stable filtering characteristic can be created. Further, the superconductive filter according to the present invention will become excellent in power withstand performance, and hence even if the number of stages of filters is increased for attaining a steep cutoff characteristic, the loss deriving from the increased number of stages can be suppressed to the minimum level.
    • 本发明涉及超导滤波技术。 根据超导滤波器(1)的布置,在其表面上形成有超导材料的柱状共振构件(23)的一端附接到过滤器壳体(21)的内壁(22) 使得柱状谐振构件和可连接到信号输入/输出电缆(5a,5b)的每个连接器(27a,27b)之间插入空间。 根据该结构,可以尽可能地抑制来自外部的热传导,并且可以稳定地产生超导条件,从而可以产生稳定的过滤特性。 此外,根据本发明的超导滤波器将具有优异的耐电性能,因此即使提高滤波器的级数以获得陡峭的截止特性,也可以将从增加的级数得到的损耗抑制到 最低水平。
    • 4. 发明授权
    • Superconductive filter module, superconductive filter assembly and heat insulating type coaxial cable
    • 超导滤波器模块,超导滤波器组件和隔热型同轴电缆
    • US06873864B2
    • 2005-03-29
    • US09925879
    • 2001-07-26
    • Manabu KaiKazunori YamanakaTsuyoshi HasegawaToru Maniwa
    • Manabu KaiKazunori YamanakaTsuyoshi HasegawaToru Maniwa
    • H01B1/00H01P1/205H01P7/04H01P1/20H01B12/02
    • H01P1/202H01P1/205H01P1/30H01P7/04Y10S505/70Y10S505/701Y10S505/866
    • The present invention relates to superconductive filter technology. According to the arrangement of the superconductive filter (1), a columnar resonating member (23) having a superconductive material formed on the surface thereof is attached at one of its ends thereof to an inner wall (22) of a filter housing (21) so that a space is interposed between the columnar resonating member and each of connectors (27a, 27b) which are connectable to a signal input/output cables (5a, 5b), respectively. According to this arrangement, heat conduction from the outside can be suppressed as far as possible, and the superconductive condition can be created with stability, with the result that a stable filtering characteristic can be created. Further, the superconductive filter according to the present invention will become excellent in power withstand performance, and hence even if the number of stages of filters is increased for attaining a steep cutoff characteristic, the loss deriving from the increased number of stages can be suppressed to the minimum level.
    • 本发明涉及超导滤波技术。 根据超导滤波器(1)的布置,在其表面形成有超导材料的柱状谐振构件(23)的一端附接到过滤器壳体(21)的内壁(22) 使得柱状共振构件和可连接到信号输入/输出电缆(5a,5b)的每个连接器(27a,27b)之间插入空间。 根据该结构,可以尽可能地抑制来自外部的热传导,并且可以稳定地产生超导条件,从而可以产生稳定的过滤特性。 此外,根据本发明的超导滤波器将具有优异的耐电性能,因此即使提高滤波器的级数以获得陡峭的截止特性,也可以将从增加的级数得到的损耗抑制到 最低水平。
    • 5. 发明授权
    • Superconductive filter module, superconductive filter assembly and heat insulating type coaxial cable
    • 超导滤波器模块,超导滤波器组件和隔热型同轴电缆
    • US07174197B2
    • 2007-02-06
    • US11024990
    • 2004-12-29
    • Manabu KaiKazunori YamanakaTsuyoshi HasegawaToru Maniwa
    • Manabu KaiKazunori YamanakaTsuyoshi HasegawaToru Maniwa
    • H01P1/20H01B12/02
    • H01P1/202H01P1/205H01P1/30H01P7/04Y10S505/70Y10S505/701Y10S505/866
    • The present invention relates to superconductive filter technology. According to the arrangement of the superconductive filter (1), a columnar resonating member (23) having a superconductive material formed on the surface thereof is attached at one of its ends thereof to an inner wall (22) of a filter housing (21) so that a space is interposed between the columnar resonating member and each of connectors (27a, 27b) which are connectable to a signal input/output cables (5a, 5b), respectively. According to this arrangement, heat conduction from the outside can be suppressed as far as possible, and the superconductive condition can be created with stability, with the result that a stable filtering characteristic can be created. Further, the superconductive filter according to the present invention will become excellent in power withstand performance, and hence even if the number of stages of filters is increased for attaining a steep cutoff characteristic, the loss deriving from the increased number of stages can be suppressed to the minimum level.
    • 本发明涉及超导滤波技术。 根据超导滤波器(1)的布置,在其表面形成有超导材料的柱状谐振构件(23)的一端附接到过滤器壳体(21)的内壁(22) 使得柱状谐振构件和可连接到信号输入/输出电缆(5a,5b)的每个连接器(27a,27b)之间插入空间。 根据该结构,可以尽可能地抑制来自外部的热传导,并且可以稳定地产生超导条件,从而可以产生稳定的过滤特性。 此外,根据本发明的超导滤波器将具有优异的耐电性能,因此即使提高滤波器的级数以获得陡峭的截止特性,也可以将从增加的级数得到的损耗抑制到 最低水平。