摘要
本文提出了一种短波频段最小电感结构的带通滤波器优化设计方法。通过分析串联/并联谐振单元特性,建立元件值和滤波器关键参数之间的数学模型。研究采用几何指数分布的传输零点配置方法,提升滤波器的带外性能。为了验证设计方法的有效性,在短波频段内对不同中心频率以及多种相对带宽(10%、30%、50%)进行了多组优化设计。仿真结果表明,通带内插入损耗低于0.5 dB,带外抑制优于40 dB,传输零点位置和理论设计偏差低于2%。该研究为短波通信系统提供了一种高带外抑制的滤波器设计解决方案。
This paper presents an optimized design methodology for compact inductor-minimized bandpass filters(BPFs)operating in the shortwave frequency band.Through rigorous analysis of series/parallel resonant unit characteristics,a mathematical model correlating component values with key filter parameters is established.A novel geometric-exponential distribution strategy for transmission zeros is proposed to significantly enhance out-of-band rejection performance.To validate the design approach,multiple optimized implementations are demonstrated across various center frequencies within the shortwave spectrum(525 MHz)with different fractional bandwidths(10%,30%,50%)Simulation results confirm excellent performance metrics:insertion loss better than 0.5 dB in passband,out-of-band suppression exceeding 40 dB,and transmission zero locations deviating less than 2%from theoretical predictions.This research provides an effective solution for high-rejection filter design in shortwave communication systems.
作者
吕昊晟
LV Haosheng(Faculty of Electrical Engineering and Computer Science,Ningbo University,Ningbo 315211,China)
出处
《无线通信技术》
2025年第4期56-60,共5页
Wireless Communication Technology
关键词
最小电感
传输零点
带通滤波器
Minimum Inductance
Transmission Zeros
Bandpass Filter
