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首页> 外文期刊>International Journal of Microwave and Wireless Technologies >Slow-wave coplanar waveguides based on inductive and capacitive loading and application to compact and harmonic suppressed power splitters
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Slow-wave coplanar waveguides based on inductive and capacitive loading and application to compact and harmonic suppressed power splitters

机译：基于电感和电容负载的慢波共面波导及其在紧凑型和谐波抑制型功率分配器中的应用

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摘要

In this paper, a slow-wave transmission line implemented in coplanar waveguide technology, based on simultaneous inductive and capacitive loading, is presented for the first time. The shunt capacitors are achieved by periodically etching transverse strips in the back substrate side, connected to the central strip through metallic vias. The series inductors are implemented by etching rectangular slots in the ground plane. The effect of these reactive elements is an enhancement of the effective shunt capacitance and series inductance of the line, leading to a significant reduction of the phase velocity (slow-wave effect). Consequently, the guided wavelength is also reduced, and these lines can be applied to the miniaturization of microwave components. Moreover, due to periodicity, these artificial lines exhibit stop bands (Bragg effect) useful for spurious or harmonic suppression. A compact harmonic suppressed power splitter, based on a slow wave 35.35 Omega impedance inverter, has been designed and fabricated in order to demonstrate the potential of the proposed approach. The length of the inverter is 48% the length of the conventional counterpart, and measured power splitting at the first (3f(o)) and second (5f(o)) harmonic frequencies is rejected more than 49 and 23 dB, respectively.
机译：在本文中，首次提出了在共面波导技术中实现的慢波传输线，该方法基于同时感性和容性负载。通过周期性地刻蚀后基板侧的横向金属条来实现并联电容器，该横向金属条通过金属通孔连接到中央金属条。串联电感通过在接地平面上蚀刻矩形槽来实现。这些电抗元件的作用是增强了线路的有效并联电容和串联电感，从而大大降低了相速度（慢波效应）。因此，所引导的波长也减小，并且这些线可以应用于微波部件的小型化。而且，由于周期性，这些人造线表现出对杂散或谐波抑制有用的阻带（布拉格效应）。设计并制造了一种基于慢波35.35 Omega阻抗逆变器的紧凑型谐波抑制功率分配器，以展示该方法的潜力。逆变器的长度是传统同类产品的48％，并且在第一（3f（o））和第二（5f（o））谐波频率处测得的功率分配分别被拒绝超过49 dB和23 dB。

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