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Compact Tri-band Bandpass Filter Based on Asymmetric Step Impedance Resonators for WiMAX and RFID Systems
- Source :
- Journal of Electromagnetic Engineering and Science, Vol 21, Iss 4, Pp 316-321 (2021)
- Publication Year :
- 2021
- Publisher :
- Korean Institute of Electromagnetic Engineering and Science, 2021.
-
Abstract
- In this article, a simple method is developed to design a highly miniaturized tri-band bandpass filter (BPF) utilizing two asymmetric coupled resonators with one step discontinuity and one uniform impedance resonator (UIR) for worldwide interoperability for microwave access (WiMAX) and radio frequency identification (RFID) applications. The first and second passbands located at 3.7 GHz and 6.6 GHz are achieved through two asymmetric coupled step impedance resonators (SIRs), while the third passband, centered at 9 GHz, is achieved using a half-wavelength UIR, respectively. The fundamental frequencies of this BPF are implemented by tuning the physical length ratio (α) and impedance ratio (R) of the asymmetric SIRs. The proposed filter is designed and fabricated with a circuit dimension of 13.69 mm × 25 mm (0.02 λg × 0.03 λg), where λg represents the guided wavelength at the first passband. The experimental and measured results are provided with good matching.
- Subjects :
- Physics
QC501-766
Radiation
Computer Networks and Communications
business.industry
wireless applications
asymmetric sir
WiMAX
TK1-9971
Electricity and magnetism
Resonator
Band-pass filter
uniform impedance resonator
Optoelectronics
Electrical engineering. Electronics. Nuclear engineering
Electrical and Electronic Engineering
business
tri-band filter
Instrumentation
Electrical impedance
Subjects
Details
- ISSN :
- 26717263 and 26717255
- Volume :
- 21
- Database :
- OpenAIRE
- Journal :
- Journal of Electromagnetic Engineering and Science
- Accession number :
- edsair.doi.dedup.....a65eec0ab7fb9763741a34564597e8d6