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为了能够将缝隙波导段多根重迭,以构成平面天线阵。本文提出了一个由波导窄壁上开缝隙对,以形成圆极化波的方法,并从理论上确定了满足圆极化波条件的缝隙对的排列方式。为此,需要精确地掌握缝隙间的互耦。本文把它作为边值问题进行了严格的推导,也即,对各缝隙口面电场,导出所满足的联立积分方程式。并对它们进行了数值解,这就定量地、准确地得到了缝隙之间的互耦效应。并且也考虑进了在以前的解析推导中所忽略了的波导壁厚的影响,我们看到它的影响是不可忽略的。为了证明本文所推导的缝隙对的排列方法的正确性,采用S波段波导WRJ—3进行了实验,获得了轴此为0.98(-0.2ab)的几乎完全的圆极化波。
In order to be able to overlap the multiple waveguide slot to form a planar antenna array. In this paper, a method of forming a circularly polarized wave by forming a pair of slits in the narrow wall of a waveguide is proposed, and the arrangement of the pair of slits that satisfy the circularly polarized wave condition is theoretically determined. For this reason, the mutual coupling between the slots needs to be accurately grasped. In this paper, we strictly deduce it as a boundary value problem, that is, we derive the simultaneous integral equation satisfied by the electric field of each slot. And numerical solution of them, which quantitatively and accurately obtained the mutual coupling effect of the gap. We also consider the effects of waveguide wall thickness neglected in previous analytical derivations and we see that its effects are not negligible. In order to prove the correctness of the arrangement of the slot pairs deduced in this paper, an experiment was carried out by using the S-band waveguide WRJ-3, and an almost perfect circularly polarized wave with an axis of 0.98 (-0.2ab) was obtained.