基于十字形谐振器的小型四频滤波器设计

摘要

A quad-band bandpass filter is designed exploiting crossed quad-mode resonators.Due to the quad-mode resonator, compact size and wide tunable range on four passband frequencies are achieved.The design procedure and design curves are pres-ented.One quad-band filter is designed,fabricated and measured to demonstrate the performance of proposed method.Four pass-bands of the proposed filter are located at 1.575,2.4,3.5,5.75 GHz,respectively,with less than 2 dB insertion loss.%给出了一种基于十字形四模谐振器的平面四频滤波器设计，由于使用了单个谐振器的4个模式，所以实现了滤波器的小型化，并且4个通带都大范围可调。给出了详细的设计过程和设计曲线。为了验证所提出的设计方法，仿真并加工测试了一个四频滤波器。滤波器的4个通带的中心频率分别在1．575、2．4、3．5和5．75 GHz，通带插损均小于2 dB。