电子学报2024，Vol.52Issue(12)：3967-3975,9.DOI:10.12263/DZXB.20240185
超宽带平坦负群时延电路设计
Design of Ultra-Wide Band Flat Negative Group Delay Circuit
摘要
Abstract
A fundamental theory of novel ultra-wide band(UWB)bandpass(BP)negative group delay(NGD)topolo-gy is established in this paper.The microwave circuit under study consists of lossy transmission lines and stepped imped-ance resonators.The flat NGD topology is constructed using fully distributed elements.The ABCD-and S-parameter mod-els are formulated to derive the NGD optimal values and bandwidth.In order to verify the theoretical feasibility,NGD proto-types are designed,fabricated,and measured.The flat BP-NGD microstrip circuit has a compact size of 11 mm×81 mm(0.13 λg×1.01 λg)with a NGD center frequency of fn=2.14 GHz.Excellent agreement has been observed between experi-mental and theoretical results,revealing ΔfNGD=1.28 GHz(BWNGD=61%fn)NGD bandwidth and tn=-0.52 ns NGD value.Fur-thermore,within the NGD frequency band,the flat BP-NGD prototype presents a good performance in terms of bandwidth about ΔfNGD=1.01 GHz,BWflat-NGD=48%fn with tn±0.05 ns group delay fluctuation.Compared with similar broadband flat NGD circuits,the flat NGD bandwidth of the SIR NGD circuit proposed in this article is increased by about 215%.The flat BP-NGD prototype return loss at the center frequency is better than 18.8 dB.关键词
负群时延/平坦群时延/阶梯阻抗谐振/S参数/设计公式/超宽带Key words
negative group delay/group delay flatness/stepped impedance resonator/S parameter/design equations/ultra-wide band分类
信息技术与安全科学引用本文复制引用
顾韬琛,万发雨,RAVELO Blaise..超宽带平坦负群时延电路设计[J].电子学报,2024,52(12):3967-3975,9.基金项目
国家重点研发计划(No.2022YFE0122700) （No.2022YFE0122700）
国家自然科学基金(No.62371241,No.62350610268) （No.62371241,No.62350610268）
北京市自然科学基金(No.L233002) （No.L233002）
国家留学基金(No.202308320302) National Key Research and Development Program of China(No.2022YFE0122700) （No.202308320302）
National Natural Science Foundation of China(No.62371241,No.62350610268) （No.62371241,No.62350610268）
Beijing Natural Science Foundation(No.L233002) （No.L233002）
Program of China Scholarship Council(No.202308320302) （No.202308320302）
