Low loss negative group delay circuit using self-packaged suspended line
Low loss negative group delay circuit using self-packaged suspended line
复制标题
采用自封装悬线的低损耗负群延迟电路
DOI：
10.1002/mmce.22879
复制
发表时间：
2021
影响因子：
1.7
通讯作者：
Yang Xiao-Yun
中科院分区：
文献类型：
--
作者：
Xiao Jian-Kang;Yang Xiao-Yun
提出了一种利用多层自封装悬挂线实现超低插入损耗的匹配负群时延（NGD）电路。使用两个不同电长度的传输路径来产生正的相位斜率，这将带来负的群延迟，而耦合线用于匹配，并且不需要常用的吸收电阻。NGD电路已被制作和测量，该设计已被证明与测量的NGD时间为−2.84 ns，NGD带宽为34 MHz，低插入损耗/信号衰减（S21）不超过2.73 dB，和S11衰减约27.8 dB。采用自封装和金属化空气腔两种方式来减少漏波，省去了通常用于电磁屏蔽的多个过孔，大大降低了制作复杂度。
A matched negative group delay (NGD) circuit with ultra‐low insertion loss by using self‐packaged multi‐layer suspended line is proposed. Two transmission paths with different electric‐lengths are used to produce positive phase slope, which would bring a negative group delay, while a coupled line is used for matching, and the commonly applied absorption resistors are not required. The NGD circuit has been fabricated and measured, and the design has been demonstrated with a measured NGD time of −2.84 ns, a NGD bandwidth of 34 MHz, a low insertion loss/signal attenuation (S21) of no more than 2.73 dB, and a S11attenuation of about 27.8 dB. Both self‐packaging and metallized air cavities are used to reduce the wave leakage, and the multiple via holes usually used for electromagnetic shielding are saved, which greatly reduce the fabrication complexity.