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首页> 外文期刊>International journal of RF and microwave computer-aided engineering >A new compact microstrip dual bandpass filter using stepped impedance and λ/2 bended resonators
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A new compact microstrip dual bandpass filter using stepped impedance and λ/2 bended resonators

机译：使用阶梯式阻抗和λ/ 2弯曲谐振器的新的紧凑型微带双带通滤波器

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摘要

In this paper, a compact dual-band bandpass filter (DB-BPF) is implemented by using a pair of coupled stepped impedance resonators (SIRs) and a pair of λ/2 bended resonators for the modern wireless communication systems such as WiMAX and WLAN (3.4 and 5.4-GHz). The physical layout is presented and explained the establishment of an LC equivalent circuit. Moreover, the second passband of the proposed dual-band bandpass filter can be independently controlled by inserting the open-circuited stubs at the end of the λ/2 bended resonators without increasing the circuit size. Simulation results show that the second passband can be ranged from 5.6 to 4.8-GHz with the bandwidth of 400 ± 96-MHz, whereas the first passband is fixed with the bandwidth of 280 ± 8.5-MHz. The measured results exhibit the insertion losses (S21) lower than 1.2 and 1.4 dB, and the return losses (S11) of −23 and −32 dB at the first and second passbands, respectively, which show a good agreement with simulation results. The dual-band microstrip filter is fabricated on RT/Rogers 4003 substrate with a compact size of 0.24λ_g × 0.25λ_g.
机译：在本文中，通过使用一对耦合的阶梯式阻抗谐振器（SIR）和一对λ/ 2弯曲的谐振器来实现紧凑的双频带布通滤波器（DB-BPF），以及用于现代无线通信系统，例如WiMAX和WLAN （3.4和5.4 GHz）。提出了物理布局并解释了LC等效电路的建立。此外，所提出的双频带通滤波器的第二通带可以通过在λ/ 2弯曲的谐振器的末端插入不增加电路尺寸的λ/ 2弯曲的谐振器的末端插入开口循环的短截线来独立地控制。仿真结果表明，第二通带可以从5.6到4.8-GHz，带宽为400±96-MHz，而第一个通带是固定的，带宽为280±8.5-mHz。测量结果表现出低于1.2和1.4dB的插入损耗（S21），以及第一和第二通带的-23和-32dB的返回损耗（S11），其显示出与模拟结果的良好一致性。双频带微带滤波器在RT / ROGERS 4003基板上制造，具有0.24λ_g×0.25λ_g的紧凑尺寸。

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