公开(公告)号：US5834975A

公开(公告)日：1998-11-10

申请号：US815694

申请日：1997-03-12

Applicant: James L. Bartlett ,  Mau Chung F. Chang ,  J. Aiden Higgins ,  Henry O. Marcy, 5th ,  Deepak Mehrotra ,  Kenneth D. Pedrotti ,  David R. Pehlke ,  Charles W. Seabury ,  J. L. Julian Tham ,  Jun J. Yao

Inventor： James L. Bartlett ,  Mau Chung F. Chang ,  J. Aiden Higgins ,  Henry O. Marcy, 5th ,  Deepak Mehrotra ,  Kenneth D. Pedrotti ,  David R. Pehlke ,  Charles W. Seabury ,  J. L. Julian Tham ,  Jun J. Yao

IPC: H03G1/00 ,  H03G3/30 ,  H03F3/68

CPC classification number: H03F3/72 ,  H03F1/0277 ,  H03F3/211 ,  H03G1/0088

Abstract: An integrated, variable gain microwave frequency power amplifier comprises a number of individual amplifier stages which contain microwave frequency active devices. Each stage is fed with a common input signal, and the individual stage outputs are connected to respective micro-electromechanical (MEM) switches which, when closed, connect the individual outputs together to form the power amplifier's output. The power amplifier's gain is determined by the number of outputs connected together. The preferred switch provides low insertion loss and excellent electrical isolation, enabling a number of amplifier stages to be efficiently interconnected to provide a wide dynamic range power amplifier. The switches are preferably integrated on a common substrate with the active devices, eliminating the need for wire bonds and reducing parasitic capacitances. A variable impedance network comprising a number of impedance matching networks selected using MEM switches can be connected to and integrated with a variable gain power amplifier to provide impedance matching that is appropriate for each of the power amplifier's possible output power levels.

Abstract translation: 集成的可变增益微波频率功率放大器包括多个单独的放大器级，其包含微波频率有源器件。 每个级馈入一个公共输入信号，并且各个级输出连接到相应的微机电（MEM）开关，当关闭时，各个输出端连接在一起形成功率放大器的输出。 功率放大器的增益取决于连接在一起的输出数量。 优选的开关提供低插入损耗和优异的电隔离，使得能够高效地互连多个放大器级，以提供宽动态范围功率放大器。 这些开关优选地与有源器件集成在公共衬底上，消除了对引线键合的需要并降低寄生电容。 包括使用MEM开关选择的多个阻抗匹配网络的可变阻抗网络可以连接到可变增益功率放大器并与可变增益功率放大器集成，以提供适合于每个功率放大器的可能输出功率电平的阻抗匹配。