A Highly Independent Multiband Bandpass Filter Using a Multi-Coupled Line Stub-SIR With Folding Structure

The main problem in designing a multiband bandpass filter (BPF) is making each passband response highly independent, where each bandwidth of multiband BPF can be controlled and adjusted separately. To overcome this problem, this paper proposes a highly independent multiband BPF based on a multicoupl...

Full description

Saved in:
Bibliographic Details
Published in:IEEE access 2020, Vol.8, p.83009-83026
Main Authors: Firmansyah, Teguh, Alaydrus, Mudrik, Wahyu, Yuyu, Rahardjo, Eko Tjipto, Wibisono, Gunawan
Format: Article
Language:English
Subjects:
Band-pass filters
Bandpass filters
Compact
Couplings
Equivalent circuits
Folding
folding structure
Folding structures
highly independent
Integrated circuit modeling
Local area networks
multiband BPF
Passband
Periodic structures
Resonant frequency
Resonators
Wireless networks
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The main problem in designing a multiband bandpass filter (BPF) is making each passband response highly independent, where each bandwidth of multiband BPF can be controlled and adjusted separately. To overcome this problem, this paper proposes a highly independent multiband BPF based on a multicoupled line stub-SIR with a folding structure. The proposed multiband BPF is constructed as a multicoupled line to generate a highly independent inter-passband. Moreover, the multiband performance is produced separately and independently by using three sets of resonators: resonator A1/A2 ( R_{A1} and R_{A2} ), resonator B1/B2 ( R_{B1} and R_{B2} ), and resonator C1/C2 ( R_{C1} and R_{C2} ). The three passband frequencies can be independently arranged and designed. To miniaturize the multiband BPF, a folding structure is also proposed. As a result, the multiband BPF has a compact size that is reduced by over 61.29 % compared to previous structures. The even-odd excitation model and the equivalent circuit model are used to analyze the multiband BPF structure. This BPF is designed for GPS applications at 1.57 GHz, WCDMA (3G) at 1.8 GHz, WLAN (WiFi) at 2.4 GHz, LTE (4G) at 2.6 GHz, and 5G communication at 3.5 GHz. To evaluate and validate the proposed structure of the multiband BPF, the circuits are fabricated and tested. The simulated and measured results of the multiband BPF show good agreement. In conclusion, the proposed multiband BPF structure has a highly independent inter passband response and a compact size.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2020.2989370