Wideband On-Chip Filter With High Selectivity and Reduced Size by Single TV Inductive Coupling

被引：8
作者：
Liu, Bao-Guang [1 ]
Pu, Jia-Cheng [1 ]
Li, Quanxin [1 ]
Yu, Ting-Ting [1 ]
Cheng, Chonghu [1 ]
机构：
[1] Nanjing Univ Posts & Telecommun, Coll Elect & Opt Engn, Nanjing 210023, Peoples R China
来源：
IEEE ELECTRON DEVICE LETTERS | 2024年 / 45卷 / 03期
基金：
中国国家自然科学基金;
关键词：
On-chip filter; high selectivity; reduced size; single through via; multiple transmission zeros; RESONATOR; STOPBAND;
D O I：
10.1109/LED.2024.3351881
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The wideband GaAs -based integrated passive device (IPD) filter with high selectivity and reduced size is proposed by utilizing single through via (TV) inductive coupling. One series and two parallel dual -mode sr -type units containing two inductors and three capacitors are used to design the wideband fourth -order filter with two transmission zeros (TZs). Then, by combining eight TVs in three sr -type units into only one TV, three different inductive coupling transmission paths can be generated between input and output ports, resulting in the proposed filter that can achieve five TZs near the passband, then, the higher selectivity and the lower / upper stopband suppression up to 23 dB / 32 dB can be achieved. Besides, size of the proposed filter layout with one TV is approximately 21% smaller than that of the conventional filter layout with eight TVs. In final, a prototype with 3 -dB fractional bandwidth of 79.3% is designed and fabricated at 3.67 GHz (f0). Its shape factor defined as 20 -dB bandwidth / 3 -dB bandwidth is only 1.25. This IPD filter occupies only 0.011 lambda(0) x 0.017 A0, where lambda(0) is the free -space wavelength at f(0).
引用
收藏
页码：336 / 339
页数：4
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