公开(公告)号：KR100884159B1

公开(公告)日：2009-02-17

申请号：KR1020070106070

申请日：2007-10-22

Applicant: 한국정보통신대학교 산학협력단

Inventor： 유상선 ,  유형준

IPC: H03H11/28

CPC classification number: H03H7/38 ,  H03F1/26 ,  H03H7/40 ,  H03H11/28

Abstract: A multiband impedance matching circuit using a self-matched capacitor is provided to optimize the performance of an RF(Radio Frequency) circuit by matching the impedance and the noise in various frequency bands. A matching device receives an external signal and matches the input impedance. A DC prevention device is connected to an output terminal of the matching device in series and blocks the DC signal. An input transistor amplifies an external signal transmitted through the DC prevention capacitor. A gate inductor is connected between the DC prevention capacitor and the gate terminal of the input transistor and matches the input impedance. A source inductor is connected between the source terminal of the input transistor and the external ground voltage and matches the input impedance. A self-matched capacitor is connected between the source terminal of the input transistor and the output terminal of the DC prevention capacitor and maintains the constant impedance in various frequency bands.

Abstract translation: 提供使用自匹配电容器的多频带阻抗匹配电路，通过匹配各种频带中的阻抗和噪声来优化RF（射频）电路的性能。 匹配装置接收外部信号并匹配输入阻抗。 DC防止装置串联连接到匹配装置的输出端子，并且阻断DC信号。 输入晶体管放大通过直流防止电容器传输的外部信号。 在直流防护电容器和输入晶体管的栅极端子之间连接有栅极电感器，并匹配输入阻抗。 源电感连接在输入晶体管的源极端子和外部接地电压之间，并匹配输入阻抗。 在输入晶体管的源极端子和直流防止电容器的输出端子之间连接有自匹配电容器，并且在各种频带中保持恒定的阻抗。