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首页> 外文期刊>Electronics Letters >Compact monopulse sum-difference comparator based on double-layer substrateintegrated waveguide
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Compact monopulse sum-difference comparator based on double-layer substrateintegrated waveguide

机译：基于双层基片集成波导的紧凑型单脉冲和差比较器

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摘要

A monopulse sum-difference comparator based on double-layer substrate integrated waveguide (SIW) for X-band applications is investigated and experimentally validated. A 90° 3-dB directional coupler with a double-stepped coupling slot in the common broad side between a pair of folded parallel SIWs and an equal-length unequal-width 90° phase shifter are adopted to form a magic tee. The four magic tees are elegantly interconnected to design a highly compact comparator. Experimental results show the bandwidth (reflection coefficient <; -10 dB) of the comparator can achieve 10% with an operating frequency range of 9.5-10.5 GHz, in which the output amplitude and phase imbalance are within 0.75 dB and 14° (RMS), respectively. The insertion losses are about 1.5-2.5 dB and the isolations between the three channels are all better than 20 dB. In particular, the double-layer configuration of the comparator network reduces the occupied area with the potential for high integration and makes it to be a good candidate for miniaturised and compact monopulse antenna systems.
机译：研究并实验验证了基于双层基片集成波导（SIW）的X波段单脉冲和差比较器。采用90°3dB定向耦合器，在一对折叠的平行SIW和等长不等宽90°移相器之间的公共宽面上具有双步耦合槽，以形成魔术三通。四个魔术T恤巧妙地相互连接，以设计一个高度紧凑的比较器。实验结果表明，在9.5-10.5 GHz的工作频率范围内，比较器的带宽（反射系数<; -10 dB）可以达到10％，其中输出幅度和相位不平衡在0.75 dB和14°（RMS）之内， 分别。插入损耗约为1.5-2.5 dB，三个通道之间的隔离度均优于20 dB。特别地，比较器网络的双层配置减少了具有高集成潜力的占用区域，使其成为小型化和紧凑型单脉冲天线系统的良好选择。

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