公开(公告)号：US06816030B2

公开(公告)日：2004-11-09

申请号：US10065290

申请日：2002-10-01

申请人： Sheng-Fuh Chang ,  Jia-Liang Chen ,  Cheng-Cheng Liu

发明人： Sheng-Fuh Chang ,  Jia-Liang Chen ,  Cheng-Cheng Liu

IPC分类号： H01P1203

CPC分类号： H01P5/02

摘要： An impedance matching circuit for providing a lossless target signal transmission and rejecting image signals of heterodyne and super-heterodyne transceiver. The impedance matching circuit includes a grounded metal membrane, a first microstrip line connected with an input circuit, a second microstrip line connected with an output circuit, and a third microstrip line connected with either the first microstrip line or the second microstrip line. The first microstrip line is not connected with the second microstrip line, and the length of the third microstrip line is equal to a quarter wavelength of an image signal. When the target signal and the image signal transmit to the impedance matching circuit, the image signal will bypass to a grounded metal membrane, and the target signal will transmit to the output circuit without signal decay through electromagnetic coupling of the first microstrip line and the second microstrip line.

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：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：US06714088B2

公开(公告)日：2004-03-30

申请号：US10065292

申请日：2002-10-01

申请人： Sheng-Fuh Chang ,  Jia-Liang Chen ,  Shi-Wei Kuo

发明人： Sheng-Fuh Chang ,  Jia-Liang Chen ,  Shi-Wei Kuo

IPC分类号： H03B714

CPC分类号： H03B5/1847

摘要： 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.

摘要翻译： 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。

公开(公告)号：US08698056B2

公开(公告)日：2014-04-15

申请号：US12926723

申请日：2010-12-07

申请人： Sheng-Fuh Chang ,  Chia-Chan Chang ,  Po-Yu Tsai

发明人： Sheng-Fuh Chang ,  Chia-Chan Chang ,  Po-Yu Tsai

IPC分类号： H05B6/76 ,  G01T1/00 ,  G01D21/00

CPC分类号： G01D21/00

摘要： A battery-free electromagnetic leakage detector includes a substrate, an antenna, a filter circuit electrically connected with the antenna, a clamp circuit electrically connected with the filter circuit, and an indicating member electrically connected with the clamp circuit. Accordingly, the battery-free electromagnetic leakage detector is structurally simple and compact and can detect electromagnetic waves and display the detection without connection with any external power source.

摘要翻译： 无电池电磁泄漏检测器包括基板，天线，与天线电连接的滤波器电路，与滤波电路电连接的钳位电路以及与钳位电路电连接的指示构件。 因此，无电池的电磁泄漏检测器在结构上简单紧凑，可以检测电磁波并显示检测，而无需与任何外部电源连接。

公开(公告)号：US20110291011A1

公开(公告)日：2011-12-01

申请号：US12926723

申请日：2010-12-07

申请人： Sheng-Fuh Chang ,  Chia-Chan Chang ,  Po-Yu Tsai

发明人： Sheng-Fuh Chang ,  Chia-Chan Chang ,  Po-Yu Tsai

IPC分类号： G01T1/00 ,  G01D21/00

CPC分类号： G01D21/00

摘要： A battery-free electromagnetic leakage detector includes a substrate, an antenna, a filter circuit electrically connected with the antenna, a clamp circuit electrically connected with the filter circuit, and an indicating member electrically connected with the clamp circuit. Accordingly, the battery-free electromagnetic leakage detector is structurally simple and compact and can detect electromagnetic waves and display the detection without connection with any external power source.

摘要翻译： 无电池电磁泄漏检测器包括基板，天线，与天线电连接的滤波器电路，与滤波电路电连接的钳位电路以及与钳位电路电连接的指示构件。 因此，无电池的电磁泄漏检测器在结构上简单紧凑，可以检测电磁波并显示检测，而无需与任何外部电源连接。

公开(公告)号：US20050237131A1

公开(公告)日：2005-10-27

申请号：US10831318

申请日：2004-04-26

申请人： Sheng-Fuh Chang ,  Yng-Huey Jeng

发明人： Sheng-Fuh Chang ,  Yng-Huey Jeng

IPC分类号： H01P1/203 ,  H03H7/01

CPC分类号： H01P1/20345 ,  H03H7/0123 ,  H03H7/1758 ,  H03H7/1775

摘要： The present invention discloses a filter using multilayer ceramic technology. The filter comprises an input port, an output port, a first lumped resonator and a first step-impedance resonator connected to the input port, a second lumped resonator and a second step-impedance resonator connected to the output port, a coupling capacitor used for the coupling of the first lumped resonator and the first step-impedance resonator to the second lumped resonator and the second step-impedance resonator. The filter according to the present invention can provide the multi-transmission zeros in the stopband to isolate the adjacent channel and suppress the harmonics, and provide the transmission poles in the passband to have lower insertion loss. In addition, a manufacturing method for the filter using multilayer ceramic technology is also disclosed.

摘要翻译： 本发明公开了一种使用多层陶瓷技术的过滤器。 滤波器包括输入端口，输出端口，第一集总谐振器和连接到输入端口的第一阶梯式阻抗谐振器，连接到输出端口的第二集总谐振器和第二级阻抗谐振器，用于 将第一集总谐振器和第一阶梯阻抗谐振器耦合到第二集总谐振器和第二阶阻抗谐振器。 根据本发明的滤波器可以在阻带中提供多传输零点，以隔离相邻信道并抑制谐波，并且提供通带中的传输极具有较低的插入损耗。 此外，还公开了使用多层陶瓷技术的过滤器的制造方法。

公开(公告)号：US07915979B2

公开(公告)日：2011-03-29

申请号：US12178703

申请日：2008-07-24

申请人： Sheng-Fuh Chang ,  Yi-Ming Chen ,  Cheng-Yu Chou

发明人： Sheng-Fuh Chang ,  Yi-Ming Chen ,  Cheng-Yu Chou

IPC分类号： H01P1/203 ,  H01P7/08

CPC分类号： H01P1/2039

摘要： The present invention discloses a switchable frequency response microwave filter, which uses voltage-controlled varactors to attain the separation or combination of the odd mode and even mode of signals in a dual-mode ring resonator to realize a bandpass or bandstop function and then controls the frequency response of the output filtered signals. Further, the present invention integrates different circuit architectures having bandpass and bandstop functions into a single circuit to reduce the complexity of the circuit.

摘要翻译： 本发明公开了一种可切换频率响应微波滤波器，其使用压控可变电抗器来实现双模环形谐振器中奇数模式和偶数模式信号的分离或组合，以实现带通或带阻功能，然后控制 输出滤波信号的频率响应。 此外，本发明将具有带通和带阻功能的不同电路架构集成到单个电路中以降低电路的复杂性。

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。