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Table 2 Polynomial roots of the eight-order dual-band filter

From: Design of Micro-strip Symmetrical Dual-band Filter Based on Wireless Sensor Network Nodes

Functions Transmission zeros, the roots of P) Reflection zeros, the roots of F) Transmitting or reflecting singularities, the roots of E)
1 1.175j 0.5097j − 0.0656 + 1.066j
2 0.4254j − 0.9809j − 0.0656 − 1.066j
3 − 0.4254j 0.9809j − 0.1711 + 0.5115j
4 − 1.175j − 0.5097j − 0.2941 + 0.8791j
5 0 0.6078j − 0.2941 − 0.8791j
6 0 − 0.6078j − 0.0287 − 0.4673j
7 − 0.8227j − 0.1711 − 0.5115j
8 0.8227j − 0.0287 + 0.4673j