Super High-Selectivity Fifth-Order Bandpass Filter with Twelve Transmission Zeros

Y.-J. Cai, F.-Y. Zhang, K.-D. Xu, D.-H. Li

Super High-Selectivity Fifth-Order Bandpass Filter with Twelve Transmission Zeros

Číslo: 4/2018
Periodikum: Radioengineering Journal
DOI: 10.13164/re.2018.1038

Klíčová slova: Bandpass filter, high-selectivity, coupled lines, transmission poles, transmission zeros

Pro získání musíte mít účet v Citace PRO.

Přečíst po přihlášení

Anotace: A fifth-order bandpass filter (BPF) with super high selectivity using three pairs of coupled lines and two open stubs is proposed. Twelve transmission zeros (TZs) from 0 to 2f_0 (f_0 denotes center frequency of the passband) and five transmission poles (TPs) in the passband can be obtained to realize good out-of-band suppression and sharp roll-off skirts. For demonstration, a simple BPF prototype centered at 2.04 GHz is designed, fabricated with measured 3-dB fractional bandwidth of 18% and very high transition band roll-off rates of over 567 dB/GHz. Good agreement between the simulations and measurements validates the design method.