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    • 3. 发明授权
    • Dual-band wireless LAN RF transceiver
    • 双频无线局域网射频收发器
    • US07444167B2
    • 2008-10-28
    • US11149230
    • 2005-06-10
    • Sheng-Fuh ChangWen-Lin ChenCheng-Hua TsaiChin-Hung ChienHung-Cheng ChenShu-Fen TangAlbert Chen
    • Sheng-Fuh ChangWen-Lin ChenCheng-Hua TsaiChin-Hung ChienHung-Cheng ChenShu-Fen TangAlbert Chen
    • H04Q7/32
    • H04B1/0071H04B1/0082
    • The present invention discloses a dual-band RF transceiver. The transceiver comprises a first module, used as the RF front-end of the dual-band transceiver and used for receiving and transmitting a first RF signal and a second RF signal; a second module, electrically connected to the first module, used as the IF IQ modulator/demodulator of the dual-band RF transceiver; a third module, electrically connected to the first and the second modules, used as the tripe-band phase-locked frequency synthesizer of the dual-band RF transceiver and used for providing a first local oscillating signal and a second local oscillating signal to the first module, and a third local oscillating signal to the second module. The dual-band RF transceiver according to the present invention realizes the dual-band triple-mode operation of IEEE802.11 a/b/g by a single dual-band RF module, and therefore the circuit size, power dissipation, component count, and cost can be dramatically reduced.
    • 本发明公开了一种双频RF收发器。 收发器包括用作双频带收发器的RF前端并用于接收和发送第一RF信号和第二RF信号的第一模块; 电连接到第一模块的第二模块,用作双频RF收发器的IF IQ调制器/解调器; 电连接到第一和第二模块的第三模块,用作双频带RF收发器的三频带锁相频率合成器,用于向第一和第二模块提供第一本地振荡信号和第二本地振荡信号 模块和第三本地振荡信号发送到第二模块。 根据本发明的双频RF收发器通过单个双频RF模块实现IEEE802.11a / b / g的双频三模操作,因此电路尺寸,功耗,组件数, 并且成本可以大大降低。
    • 8. 发明授权
    • Low-phase-noise oscillator with a microstrip resonator
    • 具有微带谐振器的低相位振荡器
    • US06714088B2
    • 2004-03-30
    • US10065292
    • 2002-10-01
    • Sheng-Fuh ChangJia-Liang ChenShi-Wei Kuo
    • Sheng-Fuh ChangJia-Liang ChenShi-Wei Kuo
    • H03B714
    • H03B5/1847
    • A low-phase noise oscillator with a microstrip resonator for generating a target signal with a predetermined frequency is provided. The resonator includes a first microstrip line and a second microstrip line. The first microstrip line is parallel with the second microstrip line without having any contact. A length of the first microstrip line equals a length of the second microstrip line, and the length equals a quarter wavelength of the target signal. When a plurality of oscillating signals is transmitted to the first microstrip line, one of the oscillating signals having the predetermined frequency will be output from the resonator by an electromagnetic coupling generated between the first microstrip line and the second microstrip line.
    • 提供具有用于产生具有预定频率的目标信号的微带谐振器的低相位噪声振荡器。 谐振器包括第一微带线和第二微带线。 第一条微带线与第二条微带线并联,没有任何接触。 第一微带线的长度等于第二微带线的长度,并且长度等于目标信号的四分之一波长。 当多个振荡信号被发送到第一微带线时,具有预定频率的振荡信号中的一个将通过在第一微带线和第二微带线之间产生的电磁耦合从谐振器输出。