374~747 MHz数字可调谐微带滤波器

doi:10.11959/j.issn.1000-436x.2016163

通信学报 ›› 2016, Vol. 37 ›› Issue (8): 129-135.doi: 10.11959/j.issn.1000-436x.2016163

374~747 MHz数字可调谐微带滤波器

田登尧,冯全源,向乾尹

西南交通大学微电子研究所，四川成都 611756

出版日期:2016-08-25 发布日期:2016-09-01
基金资助:
国家自然科学基金资助项目;国家自然科学基金资助项目;国家自然科学基金资助项目;四川省科技支撑计划基金资助项目;中央高校基金资助项目;中央高校基金资助项目

374~747 MHz digital tunable microstrip filter

Deng-yao TIAN,Quan-yuan FENG,Qian-yin XIANG

Institute of Microelectronics,Southwest Jiaotong University,Chengdu 611756,China

Online:2016-08-25 Published:2016-09-01
Supported by:
The National Natural Science Foundation of China;The National Natural Science Foundation of China;The National Natural Science Foundation of China;Science and Technology Foundation of Sichuan Province;Central University Foundation;Central University Foundation

摘要/Abstract

摘要：

通过在微带开口谐振环加载数字可调电容，设计了一种新颖数字微带可调滤波器，同时提出了新型的非均匀开口谐振环混合耦合结构，使谐振器间耦合系数随谐振频率的降低而增大，实现恒定绝对带宽可调滤波器。接着对所提出的基于5 bit数字可调电容的数字可调微带滤波器进行了仿真和制作，测试表明，其通带中心频率可实现374~747 MHz可调，?3 dB绝对带宽在44~67 MHz之间变化，OIP3大于50 dBm。

关键词: 恒定绝对带宽, 数字可调电容, 带通滤波器, 微带开口谐振环

Abstract:

A novel digital microstrip tunable bandpass filter based on digitally tunable capacitor loading microstrip open ring resonators was proposed.The novel non-uniform open ring resonances with mixed coupling structure was used to make the coupling coefficient of the resonators increases with the decreasing of resonance frequency and achieve a con-stant absolute bandwidth tunable filter.Then the proposed digital tunable microstrip filters based on 5 bit digitally tunable capacitance was simulated and manufactured.The measurement shows that the ?3 dB absolute bandwidth varies from 44~67 MHz while the central frequency of the passband varying from 374~747 MHz,the OIP3 is greater than 50 dBm.

Key words: constant absolute bandwidth, digitally tunable capacitor, bandpass filter, microstrip open ring resonators

田登尧,冯全源,向乾尹. 374~747 MHz数字可调谐微带滤波器[J]. 通信学报, 2016, 37(8): 129-135.

Deng-yao TIAN,Quan-yuan FENG,Qian-yin XIANG. 374~747 MHz digital tunable microstrip filter[J]. Journal on Communications, 2016, 37(8): 129-135.

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参考文献 18

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参数	典型值
Y₁/φ₁/Y₂/φ₂	0.016/4.16×10^?11ω/0.013/1.56×10^?10ω
Y₃/φ₃/φ₆	0.012/7.14×10^?11ω/2.15×10^?11ω
Y_4e/φ_4e/Y_4o/φ_4o	0.010/1.89×10^?11ω/0.015/1.74×10^?11ω
Y_5e/φ_5e/Y_5o/φ_5o	0.011/1.50×10^?10ω/0.027/1.32×10^?10ω

方法	f₀/GHz	带宽范围	插入损耗/dB	OIP3/dBm	调节技术	中心频率调节比	控制电压/V
文献[ 14 ]方法	0.45~0.94	N/A	7.9 ± 0.15	N/A	LC+DTC (0.6~4.6 pF,5 bit)	2.09	5
文献[ 8 ]方法	2.415~2.732	?3 dB:200.6~219.1 MHz	1.7~2.7	13.3~33.4	微带线+变容二极管(0.63~2.67 pF)	1.13	0~30
文献[ 12 ]方法	1.52~1.95	?1 dB:4.4%~5.4%	1.25~2.9	N/A	微带线+变容二极管(0.9~3.4 pF)	1.28	2.4~22
文献[ 16 ]方法	0.803~1.335	?1 dB:5.1%~5.7%	1.04~2.88	10.1~17.5	微带线+变容二极管(0.49~3.97 pF)	1.66	1~20
本文方法	0.374~0.747	?3 dB:44~67 MHz	3~3.6	50.9~51.9	微带线+DTC (0.6~4.6 pF,5 bit)	2.00	5

374~747 MHz数字可调谐微带滤波器

374~747 MHz digital tunable microstrip filter

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