摘要
提出了一个用阶跃阻抗谐振器(SIR)实现的毫米波超宽带(UWB)滤波器。滤波器的基本单元是一个由半波长微带线谐振器和SIR组成的三模谐振器。该谐振器采用SIR结构,从而达到阻带宽、结构紧凑,且能很好地改善带外抑制。为了进一步改善阻带特性,该三模谐振器与半波长谐振器平行耦合形成新型的滤波器。该滤波器有多个传输极点和传输零点,形成陡峭的通带边缘特性和很宽的阻带。实验测得滤波器的-3 dB相对带宽为35.7%,通带内的插入损耗约为-1.7 dB。插入损耗低于-17 dB的高频端阻带可到76 GHz。滤波器的仿真结果和测试结果基本吻合。
A novel millimeter-wave ultra-wideband filter using stepped-impedance resonators （SIRs） is proposed. The basic unit of the proposed filter is a three-mode resonator that consists of a half-wavelength resonator and two shunt SIRs. The resonator improves performance of out-band rejection by using SIRs, having advantages of wide stopband and compact structure. In order to improve performance in the stopband, a new filter by cascading the three-mode resonator and half-wavelength resonators is proposed. The proposed filter possesses multiple transmission poles in the passband and multiple transmission zeros near the passband,thus sharp skirt property and wide stopband are obtained. The filter is fabricated and measured. The -3 dB fractional bandwidth is 35.7% . The insertion loss is greater than -1.7 dB in the passband. The upper stopband is up to 76 GHz while the insertion loss is below - 17 dB. The good agreement between the measured and the simulated results is observed.
出处
《无线电通信技术》
2013年第3期53-56,共4页
Radio Communications Technology
基金
上海市重点学科(S30108)
科委重点实验室项目基金(08DZ2231100)资助
