A terahertz spatial power combiner based on 2D periodic hole-shaped grating using nongradient optimization method

作者：Zhang, Fan; Song, Kaijun^*; Fan, Yong

来源：Electromagnetics, 2017, 37(8): 538-549.

DOI：10.1080/02726343.2017.1395582

• Spatial power combiner
• hole-shaped hologram
• nongradient optimization method
• terahertz technique

This paper describes a terahertz spatial power combiner based on a periodic hole-shaped hologram for a two-dimensional (2D) horn antenna array. The combiner consists of a 2D array of rectangular horns, a dielectric hole-shaped hologram, a focusing reflector, and a receiving horn antenna. The hologram is realized as 2D periodic holes, which transforms the beams of the antenna array into a pseudoplane wave. The transformed wave is coupled into a rectangular output horn antenna by a parabolic reflector with a shaped surface relief. The field distribution on the receiving plane can be obtained by using a nongradient optimization method to optimize the reflector surface. An example operating at 300 GHz is described. The theoretical power combining efficiency is about 63.1%. The computed field distribution agrees well with the result obtained using the commercial software FEKO Suite.

• 出版日期2017
• 单位电子科技大学