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    • 1. 发明授权
    • Microwave filter with U-type resonator
    • 带U型谐振器的微波滤波器
    • US6054909A
    • 2000-04-25
    • US137711
    • 1998-08-21
    • Chang Hwa LeeMyung Soo KimBon Hee KooDong Suk JunSang Seok LeeTae Goo Choy
    • Chang Hwa LeeMyung Soo KimBon Hee KooDong Suk JunSang Seok LeeTae Goo Choy
    • H01P1/205H01P7/04
    • H01P1/2056
    • The present invention relates to a microwave filter, having U-type resonators, which passes a desired frequency signal and removes an undesired frequency signal when used in a high frequency antenna circuit for wireless communication systems. In accordance with the trend of reducing communication system terminals, it is required to reduce a high frequency filter. The high frequency filter is required to attenuate signals very sharply at the stop band especially near to a passband transmitting and receiving frequency, so as to improve the efficiency of the frequency. The filter may be reduced in weight by forming U-type resonators instead of straight-type resonators. Excellent attenuation characteristics may be achieved at the stop band lower than the passband, using the difference of the characteristic impedance between the open end portion and the shorted portion of the resonator by forming the coupling control grooves at the outer walls of the dielectric block.
    • 本发明涉及一种具有U型谐振器的微波滤波器,当用于无线通信系统的高频天线电路中时,该滤波器通过期望的频率信号并去除非期望的频率信号。 根据减少通信系统终端的趋势,需要降低高频滤波器。 需要高频滤波器在阻带处非常清晰地衰减信号,特别是靠近通带发射和接收频率,以提高频率的效率。 通过形成U型谐振器而不是直型谐振器,可以减小滤波器的重量。 通过在介质块的外壁处形成耦合控制槽,可以通过使用谐振器的开口端部分和短路部分之间的特性阻抗的差异,在低于通带的阻带处获得优异的衰减特性。
    • 3. 发明授权
    • Duplexer with stepped impedance resonators
    • 带有阶梯式阻抗谐振器的双工器
    • US06373352B1
    • 2002-04-16
    • US09530322
    • 2000-04-28
    • Chang Hwa LeeMeyng Soo KimBon Hee KooDong Suk JunSang Seok LeeTae Goo Choy
    • Chang Hwa LeeMeyng Soo KimBon Hee KooDong Suk JunSang Seok LeeTae Goo Choy
    • H01P512
    • H01P1/2136
    • A duplexer using a dielectric block and having stepped impedance resonators is disclosed. The duplexer comprising open ended resonators arranged in a front side of the dielectric block, shorted resonators arranged in a rear side of the dielectric block, first grooves for controlling receiving coupling at the receiving filter, second grooves for controlling transmitting coupling at the transmitting filter, and a plurality of recesses formed at the bottom of the dielectric block, extending from a first aperture of the open ended resonators to a second aperture of the shorted resonators. The duplexer according to this invention is miniaturized by excluding external elements and has excellent attenuation characteristics, and is being manufactured by simple processes.
    • 公开了一种使用介质块并具有阶梯式阻抗谐振器的双工器。 该双工器包括布置在介质块的前侧的开放式谐振器,布置在介质块的后侧的短路的谐振器,用于控制在接收滤波器处的接收耦合的第一沟槽,用于控制在发射滤波器处的发射耦合的第二沟槽, 以及形成在所述介质块的底部处的多个凹部,从所述开口谐振器的第一孔延伸到所述短路谐振器的第二孔。 根据本发明的双工器通过排除外部元件而小型化并具有优异的衰减特性,并且通过简单的工艺制造。
    • 4. 发明授权
    • S/N enhancer
    • S / N增强子
    • US06937112B2
    • 2005-08-30
    • US10185115
    • 2002-06-27
    • Dong Suk JunSang Seok LeeTae Goo ChoyJin Woo HahnDong Young KimHong Yeol Lee
    • Dong Suk JunSang Seok LeeTae Goo ChoyJin Woo HahnDong Young KimHong Yeol Lee
    • H01P1/215H01P1/23H01P5/10H01P5/19H04N5/52H01P5/12H01P5/20H01Q3/22
    • H01P5/10
    • A S/N enhancer using the magnetostatic wave signal. The S/N enhancer comprises a balun coupler for dividing an input signal into a first and second signals having the same power, the second signal having the phase difference of 180 degree with respect to the first signal; a saturation magnetostatic wave filter for receiving the first signal output from the balun coupler, converting that into a magnetostatic wave signal, and oppositely converting the magnetostatic wave signal, wherein the power of the magnetostatic wave signal is saturated if the first signal has the power of equal to and more than that of a noise signal; a delay line having the linearity to transmit the second signal output from the balun coupler; and a power synthesizer for synthesizing the respective signals output from the saturation magnetostatic wave filter and the delay line.
    • 使用静磁波信号的S / N增强器。 S / N增强器包括:平衡 - 不平衡转换器,用于将输入信号分成具有相同功率的第一和第二信号,第二信号相对于第一信号具有180度的相位差; 饱和静磁波滤波器,用于接收从平衡 - 不平衡变换器耦合器输出的第一信号,将其转换成静磁波信号,并相反地转换静磁波信号,其中如果第一信号具有 等于和大于噪声信号; 具有线性以延迟从所述平衡 - 不平衡转换器耦合器输出的第二信号的延迟线; 以及用于合成从饱和静磁波滤波器和延迟线输出的各个信号的功率合成器。
    • 5. 发明授权
    • S/N enhancer
    • S / N增强子
    • US06850132B2
    • 2005-02-01
    • US10737554
    • 2003-12-15
    • Dong Suk JunSang Seok LeeTae Goo ChoyJin Woo HahnDong Young KimHong Yeol Lee
    • Dong Suk JunSang Seok LeeTae Goo ChoyJin Woo HahnDong Young KimHong Yeol Lee
    • H01P1/215H01P1/23H01P5/10H01P5/19H04N5/52H01P1/20H03H7/34
    • H01P5/10
    • A S/N enhancer using the magnetostatic wave signal. The S/N enhancer comprises a balun coupler for dividing an input signal into a first and second signals having the same power, the second signal having the phase difference of 180 degree with respect to the first signal; a saturation magnetostatic wave filter for receiving the first signal output from said balun coupler, converting that into a magnetostatic wave signal, and oppositely converting the magnetostatic wave signal, wherein the power of the magnetostatic wave signal is saturated if the first signal has the power of equal to and more than that of a noise signal; a linear magnetostatic wave filter for receiving the second signal from said balun coupler, converting that into a magnetostatic wave signal, and oppositely converting the magnetostatic wave signal, wherein the received second signal is converted into the magnetostatic wave signal having an energy linear to the power of the input signal; and a power synthesizer for synthesizing the respective signals output from said saturation magnetostatic wave filter and said linear magnetostatic wave filter.
    • 使用静磁波信号的S / N增强器。 S / N增强器包括:平衡 - 不平衡转换器,用于将输入信号分成具有相同功率的第一和第二信号,第二信号相对于第一信号具有180度的相位差; 饱和静磁波滤波器,用于接收从所述平衡 - 不平衡变换器耦合器输出的第一信号,将其转换为静磁波信号,并相反地转换静磁波信号,其中如果第一信号的功率为 等于和大于噪声信号; 线性静磁波滤波器,用于接收来自所述平衡 - 不平衡转换器的第二信号,将其转换为静磁波信号,并相反地转换静磁波信号,其中所接收的第二信号被转换成具有与功率成线性关系的能量的静磁波信号 的输入信号; 以及用于合成从所述饱和静磁波滤波器和所述线性静磁波滤波器输出的各个信号的功率合成器。
    • 8. 发明授权
    • MgAl2O4-system dielectric ceramic composition and method for fabricating dielectric ceramic using the same
    • MgAl2O4系介电陶瓷组合物及其制备方法
    • US06673731B2
    • 2004-01-06
    • US10152221
    • 2002-05-20
    • Jin Woo HahnDong Young KimSang Seok LeeTae Goo Choy
    • Jin Woo HahnDong Young KimSang Seok LeeTae Goo Choy
    • C04B35443
    • C04B35/443C04B2235/3203C04B2235/77
    • The present invention relates to a ceramic dielectric material for communication components, which can be used in the microwave and millimeter wave frequency band. More particularly, the present invention relates to a dielectric ceramic composition for the microwave/millimeter wave frequency band having a very high quality factor and a low dielectric constant, and a method of manufacturing the dielectric ceramic using the same. The dielectric ceramic composition consists of spinel (MgAl2O4) as a major component and a small amount of lithium carbonate (Li2CO3) as a sub composition with a specific composition formula. The dielectric ceramic is manufactured from magnesia (MgO), alumina (Al2O3) and lithium carbonate (Li2CO3) as raw materials and through the ceramic processing of calcination, shaping and sintering. The obtained dielectric ceramic has the quality factor (Q×f) of 160,000 and the dielectric constant (&egr;r) of 8.5. Composition formula: MgAl2O4+xLi2CO3(mol %) where, 0
    • 本发明涉及可用于微波和毫米波频带的通信部件用陶瓷电介质材料。 更具体地说,本发明涉及具有非常高的品质因数和低介电常数的用于微波/毫米波频带的电介质陶瓷组合物,以及使用该电介质陶瓷的方法。 电介质陶瓷组合物由作为主要成分的尖晶石(MgAl 2 O 4)和作为具有特定组成式的亚组合物的少量碳酸锂(Li 2 CO 3)组成。 电介质陶瓷由氧化镁(MgO),氧化铝(Al2O3)和碳酸锂(Li2CO3)为原料,通过陶瓷加工煅烧,成形和烧结制成。 所获得的介电陶瓷的品质因子(Qxf)为160,000,介电常数(ε)为8.5。组成式:其中,0