Realization of Low in-Band Harmonic for Compact 6–18-GHz T/R Module Under TX-Mode Operation  

作　　者：Jinming LAI Zhiyou LI Chaojie WANG Hailong WANG Xiaohua MA 

机构地区：[1]School of Microelectronics,Xidian University,Xian 710071,China [2]CETC 29th Research Institute,Chengdu 610036,China

出　　处：《Chinese Journal of Electronics》2024年第2期380-384,共5页电子学报（英文版）

摘　　要：Wideband high power amplifier(PA)with poor harmonic suppression will degrade the performance of the active electronically scanned array(AESA)due to its harmonic products falling into the operating bandwidth of a wideband T/R module.In view of this,a compact reconfigurable harmonic suppress circuit(HSC)is proposed to achieve low in-band harmonic for compact T/R module with multiple octaves under TX-mode operation.The HSC consists of eight microstrip resonant stubs with high impedance and multiple p-i-n switches.By controlling the p-i-n switches,the HSC can work in three states.When six of the used p-i-n switches are“ON”state,the corresponding microstrip resonant stubs are loaded onto the 50Ωtransmission line,which performs a bandstop filter(BSF).For verification,the HSC with bandwidth of 12–15 GHz/15–18 GHz is designed to apply to a 6–18 GHz T/R module.As a result,the second harmonic of 6–9 GHz transmitting signal can be suppressed below 32 dBc when compared to the PA’s fundamental output.While the p-i-n switches are“OFF”state,the HSC is almost the same as a 50Ωtransmission line,which will have a little effect on the 9–18 GHz transmitting signal.The measurement results approximately agree with the calculated results and simulated results,which demonstrate the validity of the proposed HSC.

关 键 词：GaN power amplifier(PA) Harmonic suppression Low in-band harmonic p-i-n switch Wideband T/R.module. 

分 类 号：TN722.75[电子电信—电路与系统]