3×3 Microstrip beam forming network for multibeam triangular array

A. N. Garcia, M. V. Isasa, Manuel Sierra Pérez
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引用次数: 2

Abstract

The design of a beam forming network (BFN) for a triangular cell of three elements is considered. A useful relation between phase excitation of the elements of the cell, beam direction, wavelength and distance is given. The BFN is studied based on a Butler matrix, using balanced and unbalanced hybrid couplers to obtain a three inputs and three outputs network which is used to develop a multibeam structure. A system of three equations is also presented to calculate the lengths of the transmission lines which connect the couplers of the network. These equations allow a flexible design of the network depending on the needed specifications. Finally, a microstrip BFN circuit that demonstrates the utility of the design has been developed.
3×3多波束三角形阵列微带波束形成网络
研究了三元三角形单元的波束形成网络的设计。给出了单元的相位激发与波束方向、波长和距离之间的关系式。基于Butler矩阵对BFN进行了研究,利用平衡和不平衡混合耦合器得到了一个三输入三输出网络,用于发展多波束结构。还提出了一个由三个方程组成的系统来计算连接网络耦合器的传输线的长度。这些方程允许根据需要的规格灵活地设计网络。最后,开发了一个微带BFN电路,证明了该设计的实用性。
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