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首页> 外文期刊>International journal of RF and microwave computer-aided engineering >Compact dual-band bandpass filter with flexible passband frequencies and sharp skirt using cross coupling and mixed magnetic and electric coupling
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Compact dual-band bandpass filter with flexible passband frequencies and sharp skirt using cross coupling and mixed magnetic and electric coupling

机译：紧凑型双频带通滤波器，具有柔性通带频率和锋利的裙子，使用交叉耦合和混合磁性和电耦合

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This paper presents the design of a compact dual-band bandpass filter (DB-BPF) with flexible passband frequencies and sharp skirt. A pair of stub loaded stepped-impedance resonators (SL-SIRs) together with two different trisection stepped-impedance resonators (TS-SIRs) constitute this DB-BPF. The low impedance sections of two SL-SIRs and one TS-SIR are realized by ring structure, on the one hand to acquire two independent resonant modes of SLSIRs, and on the other hand to let the harmonic mode of TS-SIR be away from the upper passband. The cross coupling, the canceling effect of mixed electric and magnetic coupling (MEMC), and the virtual ground introduce the TZs, resulting in the sharp skirt property of proposed DB-BPF. Step-to-step design process is given to guide the DB-BPF design. As an example, a 0.9 / 1.8 GHz DB-BPF is designed and fabricated. The fabricated sharp skirts DB-BPF has a compact size of 0.079λ_g × 0.193λ_g, low passband loss of 0.84 / 0.98 dB and high band-to-band rejection of better than 40.6 dB.
机译：本文介绍了具有柔性通带频率和锋利裙的紧凑型双频带通滤波器（DB-BPF）。与两个不同的三级步进阻抗谐振器（TS-SIRS）一起组成的一对存根级数阻抗谐振器（SL-SIRS）构成该DB-BPF。通过环形结构实现两个SL-SIR和一个TS-SIR的低阻抗部分，一方面是通过环形结构实现的，以获取两个独立的SLSIR的谐振模式，另一方面，让TS-SIR的谐波模式远离上通带。交叉耦合，混合电耦合（MEMC）的抵消效果，以及虚拟地引入TZS，导致提出的DB-BPF的尖锐裙性。步进到步骤设计过程指导DB-BPF设计。例如，设计和制造0.9 / 1.8 GHz DB-BPF。制造的锋利裙DB-BPF具有紧凑型尺寸为0.079λ_g×0.193λ_g，低通带损耗为0.84 / 0.98 dB，高带波带抑制优于40.6 dB。

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