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(Ω′) | Reflection zeros, the roots of F(Ω′) | Transmitting or reflecting singularities, the roots of E(Ω′) |
|---|---|---|---|
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 |