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首页> 外文期刊>Microwaves, Antennas & Propagation, IET >Millimetre-wave low-temperature co-fired ceramic bandpass filter with independently controllable dual passbands
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Millimetre-wave low-temperature co-fired ceramic bandpass filter with independently controllable dual passbands

机译：具有独立可控双通带的毫米波低温共烧陶瓷带通滤波器

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摘要

This study presents a detailed investigation on the frequency properties of the stub-loaded stepped-impedance resonator (SIR). For the first time, the frequency controllability of the third and fifth harmonic resonant frequencies ( and ) of the SIR under different ratios of impedance and electric length is subjected to a complete theoretical analysis. It can be found that there is a length ratio which makes and the voltage-null point at never be affected by the change of the impedance ratio. Furthermore, the stub loaded at this voltage-null point also has no effect on . These features are successfully applicable to realise independent frequency control for dual-band bandpass filters (BPFs). In this situation, a new coupling path through the loaded stub can be constructed only for , and the coupling coefficients for the two bands can be individually varied. Accordingly, both the operational frequencies and bandwidths of the two bands can be separately adjusted. For demonstration, an independently controllable dual-band BPF operating at 27.5/33 GHz is designed and fabricated for millimetre-wave wireless applications. Good accordance is achieved between the simulated and measured results.
机译：这项研究提出了对短负载步进阻抗谐振器（SIR）的频率特性的详细研究。首次对SIR在不同阻抗和电气长度比下的SIR三次谐波和第五次谐波谐振频率的频率可控性进行了完整的理论分析。可以发现，存在一定的长度比，使得阻抗比的变化永远不会影响电压零点。此外，在该零电压点上加载的短截线也不会影响。这些功能可成功应用于实现双频带带通滤波器（BPF）的独立频率控制。在这种情况下，只能为构造一条通过已加载的存根的新耦合路径，并且两个频带的耦合系数可以分别更改。因此，两个频带的工作频率和带宽都可以分别调节。为了演示，针对毫米波无线应用设计并制造了工作在27.5 / 33 GHz的可独立控制的双频带BPF。在模拟结果和测量结果之间取得了良好的一致性。

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