Design of compact frequency agile filter-antenna using reconfigurable ring resonator bandpass filter for future cognitive radios

Hany A. Atallah, Adel B. Abdel-Rahman, Kuniaki Yoshitomi, Ramesh Pokharel

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this paper, a new miniaturized frequency agile filter-antenna with a wide reconfigurable frequency band is proposed for interweave cognitive radios (CRs). A tunable bandpass filter (BPF) composed of a symmetrical ring resonator is cascaded to the feed line of an ultra-wideband planar antenna. The structure of the proposed ring resonator BPF is simple and compact so that the total size of the proposed filter-antenna is smaller than that of a conventional system made of a separate antenna and BPF. The reconfigurability of the proposed filter-antenna is achieved by changing the operating frequency of the BPF by loading the ring resonator with a single varactor diode at its center. The fabricated prototype has successfully achieved a wide operational bandwidth of 1.43 GHz which covers continuous narrow bands from 4.65 to 6.08 GHz. Moreover, the operating tunable narrow bands have stable radiation characteristics. Good agreement between measurement and simulation results is demonstrated.

Original languageEnglish
Pages (from-to)487-496
Number of pages10
JournalInternational Journal of Microwave and Wireless Technologies
Volume10
Issue number4
DOIs
Publication statusPublished - May 1 2018

Fingerprint

Cognitive radio
Bandpass filters
Resonators
Antennas
Varactors
Antenna feeders
Ultra-wideband (UWB)
Frequency bands
Diodes
Bandwidth
Radiation

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

@article{2317646beba743d090ba1893b1180d4c,
title = "Design of compact frequency agile filter-antenna using reconfigurable ring resonator bandpass filter for future cognitive radios",
abstract = "In this paper, a new miniaturized frequency agile filter-antenna with a wide reconfigurable frequency band is proposed for interweave cognitive radios (CRs). A tunable bandpass filter (BPF) composed of a symmetrical ring resonator is cascaded to the feed line of an ultra-wideband planar antenna. The structure of the proposed ring resonator BPF is simple and compact so that the total size of the proposed filter-antenna is smaller than that of a conventional system made of a separate antenna and BPF. The reconfigurability of the proposed filter-antenna is achieved by changing the operating frequency of the BPF by loading the ring resonator with a single varactor diode at its center. The fabricated prototype has successfully achieved a wide operational bandwidth of 1.43 GHz which covers continuous narrow bands from 4.65 to 6.08 GHz. Moreover, the operating tunable narrow bands have stable radiation characteristics. Good agreement between measurement and simulation results is demonstrated.",
author = "Atallah, {Hany A.} and Abdel-Rahman, {Adel B.} and Kuniaki Yoshitomi and Ramesh Pokharel",
year = "2018",
month = "5",
day = "1",
doi = "10.1017/S1759078717001556",
language = "English",
volume = "10",
pages = "487--496",
journal = "International Journal of Microwave and Wireless Technologies",
issn = "1759-0787",
publisher = "Cambridge University Press",
number = "4",

}

TY - JOUR

T1 - Design of compact frequency agile filter-antenna using reconfigurable ring resonator bandpass filter for future cognitive radios

AU - Atallah, Hany A.

AU - Abdel-Rahman, Adel B.

AU - Yoshitomi, Kuniaki

AU - Pokharel, Ramesh

PY - 2018/5/1

Y1 - 2018/5/1

N2 - In this paper, a new miniaturized frequency agile filter-antenna with a wide reconfigurable frequency band is proposed for interweave cognitive radios (CRs). A tunable bandpass filter (BPF) composed of a symmetrical ring resonator is cascaded to the feed line of an ultra-wideband planar antenna. The structure of the proposed ring resonator BPF is simple and compact so that the total size of the proposed filter-antenna is smaller than that of a conventional system made of a separate antenna and BPF. The reconfigurability of the proposed filter-antenna is achieved by changing the operating frequency of the BPF by loading the ring resonator with a single varactor diode at its center. The fabricated prototype has successfully achieved a wide operational bandwidth of 1.43 GHz which covers continuous narrow bands from 4.65 to 6.08 GHz. Moreover, the operating tunable narrow bands have stable radiation characteristics. Good agreement between measurement and simulation results is demonstrated.

AB - In this paper, a new miniaturized frequency agile filter-antenna with a wide reconfigurable frequency band is proposed for interweave cognitive radios (CRs). A tunable bandpass filter (BPF) composed of a symmetrical ring resonator is cascaded to the feed line of an ultra-wideband planar antenna. The structure of the proposed ring resonator BPF is simple and compact so that the total size of the proposed filter-antenna is smaller than that of a conventional system made of a separate antenna and BPF. The reconfigurability of the proposed filter-antenna is achieved by changing the operating frequency of the BPF by loading the ring resonator with a single varactor diode at its center. The fabricated prototype has successfully achieved a wide operational bandwidth of 1.43 GHz which covers continuous narrow bands from 4.65 to 6.08 GHz. Moreover, the operating tunable narrow bands have stable radiation characteristics. Good agreement between measurement and simulation results is demonstrated.

UR - http://www.scopus.com/inward/record.url?scp=85054073760&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85054073760&partnerID=8YFLogxK

U2 - 10.1017/S1759078717001556

DO - 10.1017/S1759078717001556

M3 - Article

VL - 10

SP - 487

EP - 496

JO - International Journal of Microwave and Wireless Technologies

JF - International Journal of Microwave and Wireless Technologies

SN - 1759-0787

IS - 4

ER -