Thermal resistance matrix representation of thermal effects and thermal design of microwave power HBTs with two-dimensional array layout
Chen Rui, Jin Dong-Yue †, Zhang Wan-Rong, Wang Li-Fan, Guo Bin, Chen Hu, Yin Ling-Han, Jia Xiao-Xue
       

Layouts of 2 × 6 HBTs arrays (a) with uniform Sx and uniform Sy (array-1), (b) with non-uniform Sx and non-uniform Sy (array-2).