公开(公告)号：US20030128085A1

公开(公告)日：2003-07-10

申请号：US10040376

申请日：2002-01-09

Applicant: Broadcom Corporation

Inventor： Ramon A. Gomez ,  Lawrence M. Burns ,  Sung-Hsien Chang ,  Carl W. Pobanz

IPC: H01P001/203

CPC classification number: H01P7/00 ,  H01P1/20 ,  H01P1/203 ,  H01P1/20381 ,  H05K1/165

Abstract: A printed bandpass filter is mounted on a precision substrate to eliminate the need for post-fabrication tuning. The filter input is capacitively coupled to a series of quarter wavelength resonators and the filter output. The quarter wavelength resonators are printed as spirals to reduce filter size. The resonators define the bandpass characteristics of the filter. The filter also weakly couples the input signal to the filter output in a manner to cancel the signal image. Mechanical clips mitigate thermal stress on solder connections when the precision substrate mounted on a second printed circuit board.

Abstract translation: 印刷的带通滤波器安装在精密基板上，以消除对制造后调谐的需要。 滤波器输入电容耦合到一系列四分之一波长谐振器和滤波器输出。 四分之一波长谐振器被打印为螺旋线以减小滤波器尺寸。 谐振器定义滤波器的带通特性。 滤波器也以以消除信号图像的方式将输入信号弱耦合到滤波器输出。 当安装在第二印刷电路板上的精密基板时，机械夹可减轻焊接连接处的热应力。

公开(公告)号：US20030128084A1

公开(公告)日：2003-07-10

申请号：US10295985

申请日：2002-11-18

Applicant: Broadcom Corporation

Inventor： Sung-Hsien Chang ,  Ramon A. Gomez ,  Lawrence M. Burns ,  Carl W. Pobanz

IPC: H01P001/20

CPC classification number: H01P7/00 ,  H01P1/20 ,  H01P1/203 ,  H01P1/20381 ,  H05K1/165

Abstract: A bandpass filter includes a plurality of resonators on a printed circuit board. An input pin is connected to a first resonator of the plurality of resonators. An output pin is connected to a second resonator of the plurality of resonators. The first and second resonators are magnetically coupled to each other. The first and second resonators are coupled to other resonators using mixed coupling. The other resonators are coupled to each other using electric coupling.

Abstract translation: 带通滤波器包括在印刷电路板上的多个谐振器。 输入引脚连接到多个谐振器的第一谐振器。 输出引脚连接到多个谐振器的第二谐振器。 第一和第二谐振器彼此磁耦合。 第一和第二谐振器使用混合耦合耦合到其它谐振器。 其他谐振器使用电耦合彼此耦合。

公开(公告)号：US20020097107A1

公开(公告)日：2002-07-25

申请号：US09892755

申请日：2001-06-28

Applicant: Broadcom Corporation

Inventor： Lawrence M. Burns ,  Carl W. Pobanz

IPC: H01P005/10

CPC classification number: H05K1/0239 ,  H01P5/10 ,  H05K2201/10015

Abstract: The invention is a balun transformer that converts a single-ended (or unbalanced) signal to a differential (or balanced) signal. The balun is a printed metal pattern on a circuit board in conjunction with several low cost chip capacitors and a low cost chip inductor. The balun transformer is a modified Marchand balun that is implemented using printed transmission lines. The balun has a plurality of coupled transmission lines to improve tolerances to variations in PC board fabrication. To make the balun compact, it is electrically lengthened through the use of capacitive loading, which reduces the required physical size. Additionally, the capacitors increase the bandwidth due to the resonant interaction between the short inductive balun and the capacitors that are placed in series with the input and the output.

Abstract translation: 本发明是将单端（或不平衡）信号转换为差分（或平衡）信号的平衡 - 不平衡变压器。 平衡 - 不平衡转换器是电路板上的印刷金属图案，结合几个低成本芯片电容器和低成本芯片电感器。 平衡 - 不平衡变压器是采用印刷传输线实现的经修改的Marchand平衡 - 不平衡变压器。 平衡 - 不平衡转换器具有多个耦合传输线，以改善对PC板制造变化的公差。 为了使平衡 - 不平衡变压器紧凑，通过使用电容负载来电延长，这减少了所需的物理尺寸。 此外，由于短路感应平衡 - 不平衡变压器和与输入和输出串联放置的电容器之间的谐振相互作用，电容器增加了带宽。