公开(公告)号：US07505790B2

公开(公告)日：2009-03-17

申请号：US11145943

申请日：2005-06-07

申请人： Sheng-Fuh Chang ,  Wen-Lin Chen ,  Yi-Yu Lu ,  Hung-Cheng Chen ,  Shu-Fen Tang ,  Albert Chen

发明人： Sheng-Fuh Chang ,  Wen-Lin Chen ,  Yi-Yu Lu ,  Hung-Cheng Chen ,  Shu-Fen Tang ,  Albert Chen

IPC分类号： H04B1/38 ,  H04M1/00

CPC分类号： H04B1/48

摘要： The present invention discloses an antenna diversity switch, used for receiving and transmitting RF signals for dual-mode co-existence wireless communication system. The antenna diversity switch comprises a first transmitting port; a second transmitting port; a receiving port; a first control unit, electrically connected between the first transmitting port and a first antenna; a second control unit, electrically connected between the first transmitting port and a second antenna; a third control unit, electrically connected between the second transmitting port and the first antenna; a forth control unit, electrically connected between the second transmitting port and the second antenna; a fifth control unit, electrically connected between the receiving port and the first antenna; a sixth control unit, electrically connected between the receiving port and the second antenna. The antenna diversity switch according to the present invention meets the requirement of IEEE 802.11b/g WLAN and Bluetooth co-existence operation with reduction of three or four antennas in the prior art to two antennas. Moreover, it provides antenna diversity for both WLAN and Bluetooth systems, where in the prior-art WLAN and Bluetooth co-existence system only WLAN system has the antenna diversity.

摘要翻译： 本发明公开了一种用于接收和发送用于双模共存无线通信系统的RF信号的天线分集开关。 天线分集开关包括第一发射端口; 第二个发送端口; 接收端口 第一控制单元，电连接在第一发送端口和第一天线之间; 第二控制单元，电连接在第一发送端口和第二天线之间; 第三控制单元，电连接在第二发送端口和第一天线之间; 第四控制单元，电连接在第二发送端口和第二天线之间; 电连接在所述接收端口和所述第一天线之间的第五控制单元; 电连接在接收端口和第二天线之间的第六控制单元。 根据本发明的天线分集交换机通过将现有技术中的三个或四个天线减少到两个天线来满足IEEE 802.11b / g WLAN和蓝牙共存操作的要求。 此外，它为WLAN和蓝牙系统提供天线分集，其中在现有技术的WLAN和蓝牙共存系统中，只有WLAN系统具有天线分集。

公开(公告)号：US20060281488A1

公开(公告)日：2006-12-14

申请号：US11149230

申请日：2005-06-10

申请人： Sheng-Fuh Chang ,  Wen-Lin Chen ,  Cheng-Hua Tsai ,  Chin-Hung Chien ,  Hung-Cheng Chen ,  Shu-Fen Tang ,  Albert Chen

发明人： Sheng-Fuh Chang ,  Wen-Lin Chen ,  Cheng-Hua Tsai ,  Chin-Hung Chien ,  Hung-Cheng Chen ,  Shu-Fen Tang ,  Albert Chen

IPC分类号： H04M1/00

CPC分类号： H04B1/0071 ,  H04B1/0082

摘要： 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.

摘要翻译： 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。

公开(公告)号：US07444167B2

公开(公告)日：2008-10-28

申请号：US11149230

申请日：2005-06-10

申请人： Sheng-Fuh Chang ,  Wen-Lin Chen ,  Cheng-Hua Tsai ,  Chin-Hung Chien ,  Hung-Cheng Chen ,  Shu-Fen Tang ,  Albert Chen

发明人： Sheng-Fuh Chang ,  Wen-Lin Chen ,  Cheng-Hua Tsai ,  Chin-Hung Chien ,  Hung-Cheng Chen ,  Shu-Fen Tang ,  Albert Chen

IPC分类号： H04Q7/32

CPC分类号： H04B1/0071 ,  H04B1/0082

摘要： 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.

摘要翻译： 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。

公开(公告)号：US07193477B2

公开(公告)日：2007-03-20

申请号：US11147458

申请日：2005-06-08

申请人： Sheng-Fuh Chang ,  Wen-Lin Chen ,  Hung-Cheng Chen ,  Shu-Fen Tang ,  Albert Chen

发明人： Sheng-Fuh Chang ,  Wen-Lin Chen ,  Hung-Cheng Chen ,  Shu-Fen Tang ,  Albert Chen

IPC分类号： H03F3/04

CPC分类号： H03F3/191 ,  H03F2200/111 ,  H03F2200/294 ,  H03F2200/372

摘要： The present invention discloses a gain amplifier, capable of concurrently operating at three different frequency bands. The gain amplifier comprises an amplification stage for amplifying a signal applied to an input of the amplifier and a triple-band resonance load connected between a DC bias voltage and a DC bias input of the amplification stage. The triple-band resonance load uses a set of reactive elements to provide match in a first frequency band, a second frequency band and in a third frequency band, such as at 2.4 GHz, 5.8 GHz and 9.0 GHz. According to the gain amplifier of the present invention, it can effectively provide triple-band signal amplification and in-band interference suppression for various multi-standard coexist communication systems.

摘要翻译： 本发明公开了一种增益放大器，能够同时在三个不同的频带工作。 增益放大器包括用于放大施加到放大器的输入的信号的放大级和连接在放大级的DC偏置电压和DC偏置输入之间的三频带谐振负载。 三频带谐振负载使用一组无功元件来提供第一频带，第二频带和第三频带（例如，2.4GHz，5.8GHz和9.0GHz）的匹配。 根据本发明的增益放大器，可以有效地为各种多标准并存通信系统提供三频带信号放大和带内干扰抑制。

公开(公告)号：US20060279362A1

公开(公告)日：2006-12-14

申请号：US11147458

申请日：2005-06-08

申请人： Sheng-Fuh Chang ,  Wen-Lin Chen ,  Hung-Cheng Chen ,  Shu-Fen Tang ,  Albert Chen

发明人： Sheng-Fuh Chang ,  Wen-Lin Chen ,  Hung-Cheng Chen ,  Shu-Fen Tang ,  Albert Chen

IPC分类号： H03F3/191

CPC分类号： H03F3/191 ,  H03F2200/111 ,  H03F2200/294 ,  H03F2200/372

摘要： The present invention discloses a gain amplifier, capable of concurrently operating at three different frequency bands. The gain amplifier comprises an amplification stage for amplifying a signal applied to an input of the amplifier and a triple-band resonance load connected between a DC bias voltage and a DC bias input of the amplification stage. The triple-band resonance load uses a set of reactive elements to provide match in a first frequency band, a second frequency band and in a third frequency band, such as at 2.4 GHz, 5.8 GHz and 9.0 GHz. According to the gain amplifier of the present invention, it can effectively provide triple-band signal amplification and in-band interference suppression for various multi-standard coexist communication systems.

摘要翻译： 本发明公开了一种增益放大器，能够同时在三个不同的频带工作。 增益放大器包括用于放大施加到放大器的输入的信号的放大级和连接在放大级的DC偏置电压和DC偏置输入之间的三频带谐振负载。 三频带谐振负载使用一组无功元件来提供第一频带，第二频带和第三频带（例如，2.4GHz，5.8GHz和9.0GHz）的匹配。 根据本发明的增益放大器，可以有效地为各种多标准共存通信系统提供三频带信号放大和带内干扰抑制。

公开(公告)号：US20060091979A1

公开(公告)日：2006-05-04

申请号：US10978395

申请日：2004-11-02

申请人： Sheng-Fuh Chang ,  Shuen-Chien Chang ,  Jia-Liang Cheng ,  Shih-Chieh Chen ,  Hung-Cheng Chen ,  Shu-Fen Tang ,  Albert Chen

发明人： Sheng-Fuh Chang ,  Shuen-Chien Chang ,  Jia-Liang Cheng ,  Shih-Chieh Chen ,  Hung-Cheng Chen ,  Shu-Fen Tang ,  Albert Chen

IPC分类号： H01P1/203

CPC分类号： H01P1/20363 ,  H01P1/20372 ,  H01P1/20381

摘要： A dual-band bandpass filter with stepped-impedance resonators uses only one circuit to generate dual-band effect. It adopts the principle of stepped-impedance resonator, which contains a connecting section and two coupling sections. The impedance and electrical length of the connecting section and coupling sections conforms to a selected condition to generate two passbands at desired frequencies. A multi-layer broadside-coupled parallel lines structure may be applied to increase coupling-amount between the parallel lines so that the dual-band bandpass filters have broader bandwidth and less loss.

摘要翻译： 带有阶梯型阻抗谐振器的双频带通滤波器仅使用一个电路来产生双频带效应。 它采用阶梯阻抗谐振器的原理，其包含连接部分和两个耦合部分。 连接部分和耦合部分的阻抗和电长度符合所选条件，以产生所需频率的两个通带。 可以应用多层宽边耦合并行线结构来增加并联线之间的耦合量，使得双频带通滤波器具有更宽的带宽和更小的损耗。

公开(公告)号：US20060044074A1

公开(公告)日：2006-03-02

申请号：US10932086

申请日：2004-09-02

申请人： Sheng-Fuh Chang ,  Jia-Liang Chen ,  Chuan-Ting Wu ,  Juo-Rui Tsai ,  Zong-Hsian Tsai ,  Hung-Cheng Chen ,  Shu-Fen Tang ,  Albert Chen

发明人： Sheng-Fuh Chang ,  Jia-Liang Chen ,  Chuan-Ting Wu ,  Juo-Rui Tsai ,  Zong-Hsian Tsai ,  Hung-Cheng Chen ,  Shu-Fen Tang ,  Albert Chen

IPC分类号： H01P5/18

CPC分类号： H01P5/185 ,  H01P5/187

摘要： A spurline directional coupler includes a first coupling section and a second coupling section that are in parallel with each other for coupling, and a first sub-coupling section and a second sub-coupling section coupled with the first coupling section, and a third sub-coupling section and a fourth sub-coupling section coupled with the second coupling section. The parallel coupling relationship between the coupling section and the sub-coupling sections generates a capacitive effect thereby may improve isolation and directivity of the spurline directional coupler.

摘要翻译： 支线定向耦合器包括彼此并联以耦合的第一耦合部分和第二耦合部分，以及与第一耦合部分耦合的第一子耦合部分和第二子耦合部分， 耦合部分和与第二耦合部分耦合的第四子耦合部分。 耦合部分和子耦合部分之间的并联耦合关系产生电容效应，从而可以提高支线定向耦合器的隔离度和方向性。

公开(公告)号：US07245186B2

公开(公告)日：2007-07-17

申请号：US10882215

申请日：2004-07-02

申请人： Sheng Fuh Chang ,  Jia Liang Chen ,  Cherng Cherng Liu ,  Hung Cheng Chen ,  Shu Fen Tang ,  Albert Chen

发明人： Sheng Fuh Chang ,  Jia Liang Chen ,  Cherng Cherng Liu ,  Hung Cheng Chen ,  Shu Fen Tang ,  Albert Chen

IPC分类号： H03F3/04

CPC分类号： H03F3/191 ,  H03F2200/147 ,  H03F2200/222 ,  H03F2200/372

摘要： The present invention discloses a bandpass amplifier having gain and bandpass performance. The bandpass amplifier includes an input match unit for matching the gain of the amplifier and having a first filter response; a first bias unit electrically connected to the input match unit for driving the first terminal of the amplifier and having a first high pass filter response; a gain stage electrically connected to the first bias unit for providing the flat gain of the amplifier; a second bias unit electrically connected to the gain stage for driving the second terminal of the amplifier and having a second high pass filter response; and an output match unit electrically connected to the second bias unit for matching the gain of the amplifier and having a second filter response.

摘要翻译： 本发明公开了具有增益和带通性能的带通放大器。 带通放大器包括用于匹配放大器的增益并具有第一滤波器响应的输入匹配单元; 电连接到输入匹配单元的第一偏置单元，用于驱动放大器的第一端并具有第一高通滤波器响应; 增益级，电连接到第一偏置单元，用于提供放大器的平坦增益; 电连接到增益级的第二偏置单元，用于驱动放大器的第二端并具有第二高通滤波器响应; 以及输出匹配单元，电连接到第二偏置单元，用于匹配放大器的增益并具有第二滤波器响应。

公开(公告)号：US07102470B2

公开(公告)日：2006-09-05

申请号：US10978395

申请日：2004-11-02

申请人： Sheng-Fuh Chang ,  Shuen-Chien Chang ,  Jia-Liang Chen ,  Shih-Chieh Chen ,  Hung-Cheng Chen ,  Shu-Fen Tang ,  Albert Chen

发明人： Sheng-Fuh Chang ,  Shuen-Chien Chang ,  Jia-Liang Chen ,  Shih-Chieh Chen ,  Hung-Cheng Chen ,  Shu-Fen Tang ,  Albert Chen

IPC分类号： H01P1/203

CPC分类号： H01P1/20363 ,  H01P1/20372 ,  H01P1/20381

摘要： A dual-band bandpass filter with stepped-impedance resonators uses only one circuit to generate dual-band effect. It adopts the principle of stepped-impedance resonator, which contains a connecting section and two coupling sections. The impedance and electrical length of the connecting section and coupling sections conforms to a selected condition to generate two passbands at desired frequencies. A multi-layer broadside-coupled parallel lines structure may be applied to increase coupling-amount between the parallel lines so that the dual-band bandpass filters have broader bandwidth and less loss.

公开(公告)号：US20090116567A1

公开(公告)日：2009-05-07

申请号：US11979687

申请日：2007-11-07

申请人： Albert Chen ,  Kuang-Ping Ma

发明人： Albert Chen ,  Kuang-Ping Ma

IPC分类号： H04L27/28

CPC分类号： H04L25/0228 ,  H04L25/0212 ,  H04L25/022

摘要： The present invention discloses a channel estimation method for Bluetooth signals through a multipath propagation channel, using a SYNC sequence as a preamble sequence. It mainly comprises the steps of: use of SYNC sequence as input to LS-based channel impulse response estimation, precomputation of local frequency domain preamble, precomputation of local inverted frequency domain preamble and shortening of estimated channel impulse response for further equalization purposes. The proposed channel estimation method and apparatus according to the present invention enables use of efficient equalization algorithms, therefore mitigating ISI and very successfully estimates propagation conditions while being very implementation-friendly.

摘要翻译： 本发明公开了一种使用SYNC序列作为前导序列的通过多径传播信道的蓝牙信号的信道估计方法。 它主要包括以下步骤：使用SYNC序列作为基于LS的信道脉冲响应估计的输入，本地频域前导码的预计算，本地反向频域前导码的预计算和用于进一步均衡的缩短估计的信道脉冲响应。 根据本发明的所提出的信道估计方法和装置使得能够使用有效的均衡算法，从而减轻ISI并且非常成功地估计传播条件，同时非常实现友好。