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首页> 外文期刊>IEEE Transactions on Antennas and Propagation >A Wideband, Wide Scanning Tightly Coupled Dipole Array With Integrated Balun (TCDA-IB)
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A Wideband, Wide Scanning Tightly Coupled Dipole Array With Integrated Balun (TCDA-IB)

机译：具有集成巴伦的宽带，宽扫描紧耦合偶极子阵列（TCDA-IB）

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摘要

A key challenge in the design of wideband dipole phased arrays is the design of equally wideband baluns which are sufficiently compact to fit within the unit cell (typically $< lambda /10$ in the linear dimension at low frequencies). In this paper, we exploit the reactance of a compact Marchand balun as an impedance matching network for each array element. The elimination of bulky external baluns results in a significant reduction of size, weight and cost, while the bandwidth is simultaneously improved by over 30%, compared to standard feeding techniques. In this manner, a tightly coupled dipole array with an integrated balun (TCDA-IB) is developed which achieves 7.35:1 bandwidth (0.68 – 5.0 GHz) while scanning to $pm 45^{circ} $ in all directions, subject to ${rm VSWR}< {2.65}:1$. In a dual-polarization configuration, the TCDA-IB has low cross polarization of $< -20~{rm dB}$ over the majority of the band. Measured results are presented for a prototype 8 $,times,$8 element TCDA-IB, showing good agreement with simulation.
机译：宽带偶极子相控阵设计的关键挑战是设计同样紧凑的平衡不平衡变换器，该变换器应足够紧凑以适合晶胞（通常 $ 。在本文中，我们将紧凑型Marchand巴伦的电抗用作每个阵列元件的阻抗匹配网络。与标准的馈电技术相比，省去了笨重的外部不平衡变压器，从而大大减小了尺寸，重量和成本，同时带宽提高了30％以上。通过这种方式，开发了具有集成巴伦（TCDA-IB）的紧密耦合偶极子阵列，该阵列在扫描到 $ pm 45 ^ {circ} $ 各个方向，取决于 $ {rm VSWR} <{2.65}：1 $ 。在双极化配置中，TCDA-IB具有较低的交叉极化，其 $ <-20〜{rm dB} $ 在整个乐队中给出了8个元素TCDA-IB原型8 $，times，$ 的测量结果，与仿真结果吻合良好。

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