极化情况下高功率微波稀布阵计算模型

Spatial powers combining of close-packed antenna array of high power microwave

建立了考虑极化情况下高功率微波稀布阵合成场的计算模型,分析了阵列合成场大小与极化及阵元初相位关系。极化方向相同时,二元线阵场分布为明暗相间的条纹,三元面阵场分布为网状结构。阵元极化方向及阵元初相位共同影响合成场的叠加效果,阵元的极化决定阵列合成场的最大值,阵元初相位在此基础上对阵列叠加效果进一步调节。对于二元线阵,极化方向夹角越小,合成叠加效率越高;对三元以上的多元面阵,其极化方向组合方式复杂,可通过阵元位置和目标位置模拟阵列合成场的叠加效率,三元稀布面阵的合成场强归一化最大值在2.22~2.43之间,与理想合成场最大值3有一定的差距。该模型提高了稀布阵列合成场强的计算准确度,对阵列高功率微波进行天线阵列设计,进一步提升目标区域的功率密度是一种比较有效的方法。

The-resultant-field-calculation-model-considering-the-direction-of-polarization-for-high-power-microwave-sparse-array-is-built.-The-relationship-of-the-resultant-field-value-with-the-direction-of-polarization-and-the-element-initial-phase-about-one-dimensional-array-is-analyzed.-If-the-polarization-direction-of-sparse-array-is-parallel,-the-field-distribution-of-two-element-arrays-is-primarily-presented-as-alternately-dark-and-bright-stripes,-and-that-of-three-element-array-is-primarily-presented-as-mesh-structure.-The-polarization-direction-and-initial-phase-of-elements-arrays-greatly-affect-the-superimposing-efficiency-of-the-resultant-field.-The-polarization-direction-decides-the-amplitude-of-the-resultant-field;while-initial-phase-of-elements-regulates-the-superimposing-efficiency-furthermore.-The-smaller-of-difference-between-the-angles,-the-bigger-of-superimposing-efficiency-will-be.-For-more-than-three-element-array-with-complexly-combined-mode-of-polarization-direction,-the-superimposing-efficiency-of-the-resultant-field-can-be-simulated-by-the-positions-of-array-and-target.-The-normalized-amplitude-value-of-the-resultant-field-is-between-2.22-2.43,-which-shows-a-difference-when-compared-with-idealized-max-value.-The-field-computational-accuracy-has-been-improved-with-this-model.-It-is-an-efficient-way-to-increase-the-power-density-about-the-target-from-High-Power-Microwave(HPM)-antenna-arrays.