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    • 1. 发明授权
    • 동일한 채널을 이용하는 중계기의 궤환신호 상쇄장치
    • CO-CHANNEL干扰噪声消除控制器
    • KR100768107B1
    • 2007-10-17
    • KR1020060074932
    • 2006-08-08
    • 한국전자통신연구원전북대학교산학협력단
    • 정용채윤재훈김종면
    • H04B7/14H04B15/00H04B10/29
    • H04B7/15585H04B15/02H04B17/103
    • An apparatus for canceling out a feedback signal of a repeater using the same channel is provided to extract a reception signal, among a feedback signal and the reception signal each having the same frequency in a non-varied wave repeater. An error signal detecting unit(20) equally distributes a mixture signal of a feedback signal and a reception signal inputted from the exterior into the first and second signals, combines the first and second signals obtained by combining a cancel-out signal to the feedback signal with in-phase to output a reception signal, and outputs the third signal by combining the cancel-out signal to the feedback signal with out-of-phase. A signal distributing unit(40) outputs a partial extract signal of a transmission signal. A signal comparing unit(50) compares signal characteristics varying according to an environment change of the third signal and the extract signal. A cancel-out signal adjusting unit(30) provides the cancel-out signal for canceling out the feedback signal by adjusting the extract signal to the error signal detecting unit(20) according to the comparison result.
    • 提供一种用于消除使用相同信道的中继器的反馈信号的装置,用于在反馈信号和每个具有相同频率的接收信号中,在非变化的波中继器中提取接收信号。 误差信号检测单元(20)将从外部输入的反馈信号和接收信号的混合信号均等地分配到第一和第二信号中,将通过组合取消信号获得的第一和第二信号组合到反馈信号 同相输出接收信号,并通过将抵消信号组合到具有异相的反馈信号来输出第三信号。 信号分配单元(40)输出发送信号的部分提取信号。 信号比较单元(50)比较根据第三信号的环境变化和提取信号而变化的信号特性。 取消信号调整单元(30)通过根据比较结果向误差信号检测单元(20)调整提取信号,提供抵消反馈信号的抵消信号。
    • 3. 发明公开
    • 위상 편차 보정 방법을 이용한 가변 감쇠 장치
    • 使用新的相位偏差补偿方法的可变衰减器
    • KR1020110084075A
    • 2011-07-21
    • KR1020100025785
    • 2010-03-23
    • 한국전자통신연구원전북대학교산학협력단
    • 정영배엄순영전순익정용채
    • H01P1/22H01P3/00
    • H01P1/22H01P1/38H01P3/08H03H7/24H03H7/38
    • PURPOSE: A phase difference compensating method and a variable attenuating device using the same are provided to add a transmission line which has specific impedance, thereby reducing a phase difference due to a parasitic component of a pin diode. CONSTITUTION: An attenuating device includes an input terminal, an output terminal, a first PIN diode(501), a second PIN diode(502), a ninety degree hybrid(503), a transmission line(504), and a second transmission line(505). The first and second transmission lines are connected to the coupling terminal and a transmission terminal of the ninety degree hybrid in series. The first PIN diode is serially connected to the first transmission line. The first and second transmission lines use specific impedance values and electric angle values.
    • 目的:提供一种相位差补偿方法和使用该相位差补偿方法的可变衰减装置,以增加具有特定阻抗的传输线,从而减少由于二极管的寄生分量引起的相位差。 构成:衰减装置包括输入端子,输出端子,第一PIN二极管(501),第二PIN二极管(502),九十度混合(503),传输线(504)和第二传输线 (505)。 第一和第二传输线连接到耦合端子和九十度混合电路的传输端子串联。 第一PIN二极管串联连接到第一传输线。 第一和第二传输线使用特定阻抗值和电角度值。
    • 7. 发明授权
    • 이중 대역 F급 전력증폭기
    • 双频F类功率放大器
    • KR101202430B1
    • 2012-11-16
    • KR1020110044368
    • 2011-05-12
    • 세원텔레텍 주식회사전북대학교산학협력단
    • 정용채김철동
    • H03F3/60H03F3/20
    • H03F3/60H01P5/10H03F1/56H03F3/217
    • PURPOSE: A dual-band class-f power amplifier is provided to match a maximum output power matching point with a terminal load in two dual band operating frequencies of one transistor through a dual band matching circuit. CONSTITUTION: A dual band harmonic cut off load circuit(200) is connected to an output terminal of a class-F power amplifier(100). The dual band harmonic cut off load circuit matches a secondary harmonic and a third harmonic. A dual band matching circuit(300) is connected to the output terminal of the dual band harmonic cut off load circuit. The maximum output power matching point is matched to a terminal load in two operating frequencies. First and second single band harmonic cut off load circuits designed in the two operating frequencies are connected each other in the dual band harmonic cut off load circuit. The first single band harmonic cut off load circuit is connected to a first transmission line through an output side connection point of the first transmission line. A terminal of the first single band harmonic cut off load circuit comprises a second transmission line and a third transmission line that are open to each short circuit. [Reference numerals] (100) Power amplifier; (200) Dual band harmonic cut off load circuit; (300) Dual band matching circuit
    • 目的:提供双频F类功率放大器,以通过双频带匹配电路将最大输出功率匹配点与一个晶体管的两个双频带工作频率中的终端负载相匹配。 构成:双频带谐波截止负载电路(200)连接到F类功率放大器(100)的输出端子。 双频谐波切断负载电路匹配二次谐波和三次谐波。 双频带谐波切断负载电路的输出端连接双频带匹配电路(300)。 最大输出功率匹配点与两个工作频率中的终端负载相匹配。 在双频谐波切断负载电路中,在两个工作频率中设计的第一和第二单频谐波截止负载电路相互连接。 第一单频谐波切断负载电路通过第一传输线的输出侧连接点连接到第一传输线。 第一单频带谐波切断负载电路的端子包括对每个短路开放的第二传输线和第三传输线。 (附图标记)(100)功率放大器; (200)双频谐波切断负载电路; (300)双频段匹配电路
    • 8. 发明授权
    • 음의 군지연 회로를 갖는 아날로그 피드백 선형 전력 증폭기
    • 模拟反馈线性功率放大器使用负数组延迟电路
    • KR101093644B1
    • 2011-12-15
    • KR1020100068622
    • 2010-07-15
    • 세원텔레텍 주식회사전북대학교산학협력단
    • 정용채김철동이기형
    • H03F1/32H03H11/26
    • H03F1/3229H03F3/602H03F2201/3227
    • PURPOSE: An analog feedback linear power amplifier with a NGDC(Negative Group Delay Circuit) is provided to increase a improved linearity bandwidth by designing a negative group delay circuit into a dispersive element type. CONSTITUTION: A main power amplifier(MPA) amplifies a signal, which is applied passing through an input combiner(11), as much as the gain of an amplifier. A band pass filter(BPF) prevents the oscillation of a signal which is extracted from the output signal extraction combiner(13) connected to the output terminal of the main power amplifier. A main signal eliminating circuit outputs an error signal by comparing the reference signal of an input signal which is applied passing through the input combiner and output signal amplified passing through the band pass filter. An error power amplifier(EPA) attenuates an error signal which is outputted in the main signal eliminating circuit. A second vector modulator(VM2) controls the amplitude and the phase of an attenuated signal in the EPA.
    • 目的:提供具有NGDC(负组延迟电路)的模拟反馈线性功率放大器,以通过将负组延迟电路设计为分散元件类型来提高线性带宽。 构成:主功率放大器(MPA)放大通过输入组合器(11)施加的信号与放大器的增益一样多的信号。 带通滤波器(BPF)阻止从连接到主功率放大器的输出端的输出信号提取组合器(13)提取的信号的振荡。 主信号消除电路通过比较通过输入组合器的输入信号的参考信号和通过带通滤波器放大的输出信号来输出误差信号。 误差功率放大器(EPA)衰减在主信号消除电路中输出的误差信号。 第二矢量调制器(VM2)控制EPA中衰减信号的振幅和相位。