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    • 2. 发明申请
    • RADIO FREQUENCY DEVICE
    • 无线电频率设备
    • US20100134208A1
    • 2010-06-03
    • US12495579
    • 2009-06-30
    • Chull Won JUJonghyurk ParkYong Il JunHee-Bum Jung
    • Chull Won JUJonghyurk ParkYong Il JunHee-Bum Jung
    • H03H9/02
    • H03H9/02417Y10S977/732Y10S977/742Y10S977/932Y10S977/949
    • An RF device is provided. The RF device includes a vibratile carbon nanotube having a nanotube natural frequency (f0), a negative electrode fixed to a first end of the carbon nanotube, a vibratile tuning electrode having a variable resonance frequency and facing a second end of the carbon nanotube, and a positive electrode electrically connected to a first end of the tuning electrode. A second end of the tuning electrode is adjacent to the second end of the carbon nanotube, and the carbon nanotube vibrates at a carrier frequency according to an external electromagnetic wave having the carrier frequency, and the tuning electrode having variable resonance frequency characteristics amplifies distance variation between the second end of the carbon nanotube and the second end of the tuning electrode to increase an electron emission sensitivity according to field emission.
    • 提供RF设备。 RF装置包括具有纳米管固有频率(f0)的振动性碳纳米管,固定在碳纳米管的第一端的负极,具有可变谐振频率且面向碳纳米管的第二端的振动调谐电极,以及 电极连接到调谐电极的第一端的正电极。 调谐电极的第二端与碳纳米管的第二端相邻,并且碳纳米管根据具有载波频率的外部电磁波以载波频率振动,并且具有可变谐振频率特性的调谐电极放大距离变化 在碳纳米管的第二端和调谐电极的第二端之间,以根据场发射增加电子发射灵敏度。
    • 4. 发明授权
    • Modulation and demodulation apparatuses and methods for wired/wireless communication system
    • 有线/无线通信系统的调制解调装置和方法
    • US07961798B2
    • 2011-06-14
    • US11989620
    • 2006-11-30
    • Yong Il Jun
    • Yong Il Jun
    • H04K1/10H04L27/28
    • H04L27/2608
    • Wired/wireless optical signal modulation and demodulation apparatuses and methods using an intensity modulation/direct detection method and an orthogonal frequency division multiplexing (OFDM) method are provided. A unipolar OFDM symbol frame is generated by determining the polarity of each of a plurality of sub-frames of a bipolar OFDM symbol frame which comprises both a plurality of positive pulses and a plurality of negative pulses, inverting the polarity of the sub-frames which are determined to be negative, delaying one of the positive sub-frame and a positive sub-frame obtained through the inversion by the duration of the sub-frames, and multiplexing the result of the delaying and whichever of the positive sub-frame and the positive sub-frame obtained through the inversion is not the result of the delaying. The unipolar OFDM symbol frame can guarantee high power amplification efficiency and high transmission power efficiency, and is robust against a multi-path channel environment. Therefore, the unipolar OFDM symbol frame can be used in various optical signal modulation/demodulation methods for wireless indoor broadband optical transmission devices, wired broadband optical transmission devices using multi-mode optical fibers, and radio-over-fiber devices which transmit baseband analog signals as optical signals.
    • 提供了使用强度调制/直接检测方法和正交频分复用(OFDM)方法的有线/无线光信号调制和解调装置和方法。 通过确定包括多个正脉冲和多个负脉冲的双极性OFDM符号帧的多个子帧中的每一个子帧的极性来产生单极OFDM符号帧,从而反转子帧的极性, 被确定为负值,将通过反转获得的正子帧和正子帧中的一个延迟子帧的持续时间,并且将延迟的结果和正的子帧和 通过反演获得的正子帧不是延迟的结果。 单极OFDM符号帧可以保证高功率放大效率和高发射功率效率,并且对于多径信道环境是鲁棒的。 因此,单极OFDM符号帧可以用于无线室内宽带光传输装置,使用多模光纤的有线宽带光传输装置以及发射基带模拟信号的无线电光纤装置的各种光信号调制/解调方法 作为光信号。