An ultrawideband bandpass filter using broadside-coupled microstrip-coplanar waveguide structure
An ultrawideband bandpass filter using broadside-coupled microstrip-coplanar waveguide structure
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DOI：
10.1109/mwsym.2005.1516697
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发表时间：
2005-06
期刊：
影响因子：
--
通讯作者：
K. Li;D. Kurita;T. Matsui
中科院分区：
文献类型：
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作者：
K. Li;D. Kurita;T. Matsui
提出了一种采用宽边耦合微带-共面波导结构的超宽带带通滤波器。该滤波器由一条微带线耦合到共面波导(CPW)组成，共面波导是在微带线的地面上制作的。针对UWB系统进行了仿真、制作和测试。测试结果表明，超宽带在3.0 GHz~10.63 GHz(-10分贝带宽)范围内具有广阔的应用前景。三段式滤波器在中心频率处的插入损耗约为0.32分贝，在整个频段内非常平坦。脉冲无线电超宽带系统的群延时在最中心频段约为0.42 ns，在整个频段小于0.95 ns，对脉冲无线电超宽带系统具有重要意义。该滤波器在带外也表现出良好的性能，无论是在低频端(满足FCC限制)还是在高于18 GHz的高频端都表现出了良好的性能，插入损耗大于30dB。
This paper presented an ultra-wideband (UWB) bandpass filter using broadside-coupled microstrip-coplanar waveguide structure. The filter consists of a microstrip line coupled to a coplanar waveguide (CPW) that was fabricated on the ground of the microstrip line. The proposed filter has been simulated, fabricated and measured for UWB system. The measured results demonstrated the UWB properties from 3.0 GHz to 10.63 GHz (-10 dB bandwidth) and the potential to be wider. A threesection filter shown insertion loss at central frequency is about 0.32 dB and very flat over the whole band. The group delay, which is important to an impulse radio UWB system, is about 0.42 ns over the most central band and less than 0.95 ns over the whole band. The filter also exhibited a good performance outside the band, both at low frequency end (to meet FCC limit) and high frequency end higher than 18 GHz with insertion loss larger than 30 dB.