Hostname: page-component-cd9895bd7-jn8rn Total loading time: 0 Render date: 2024-12-21T19:04:22.487Z Has data issue: false hasContentIssue false
  • English
  • Français

Tunable dual-band resonators for communication systems

Published online by Cambridge University Press:  09 June 2010

David Girbau ,
Antonio Lázaro ,
Albert Pérez ,
Esther Martínez ,
Lluís Pradell  and
Ramón Villarino
David Girbau*
Affiliation:
Universitat Rovira I Virgili, DEEEiA, 26 Avenue Països Catalans, 43007 Tarragona, Catalunya, Spain.
Antonio Lázaro
Affiliation:
Universitat Rovira I Virgili, DEEEiA, 26 Avenue Països Catalans, 43007 Tarragona, Catalunya, Spain.
Albert Pérez
Affiliation:
Universitat Politècnica DE Catalunya, TSC, 1-3 Jordi Girona, 08034 Barcelona, Catalunya, Spain.
Esther Martínez
Affiliation:
Universitat Politècnica DE Catalunya, TSC, 1-3 Jordi Girona, 08034 Barcelona, Catalunya, Spain.
Lluís Pradell
Affiliation:
Universitat Politècnica DE Catalunya, TSC, 1-3 Jordi Girona, 08034 Barcelona, Catalunya, Spain.
Ramón Villarino
Affiliation:
Universitat Rovira I Virgili, DEEEiA, 26 Avenue Països Catalans, 43007 Tarragona, Catalunya, Spain.
*
Corresponding author: D. Girbau Email: [email protected]
Get access Rights & Permissions [Opens in a new window]

Abstract

This paper proposes the design of tunable dual-band resonators for multi-band multi-standard systems. The main objective is to provide frequency tunability in the second resonance while maintaining the first resonance fixed. To this end, two tunable resonators are proposed: the capacitive-loaded stepped-impedance resonator and the capacitive-loaded hole resonator. The work is divided into two main parts. In the first part, an in-depth analysis of the capacitive-loaded stepped-impedance resonator (SIR) structure is done; it provides analytical closed-form design equations that ease the resonator design in contrast to the several approaches available in the literature to date. The analysis is also particularized to the case of the capacitive-loaded constant-section resonator and extended to the capacitive-loaded hole resonator. In addition, a study of the quality factor in capacitively tuned SIRs is also provided. In the second part, resonators are integrated in three dual-band tunable filters, one based on the capacitive-loaded constant-section resonator, another one on the capacitive-loaded SIR, and finally on the capacitive-loaded hole resonator. Two of these filters demonstrate operation in wireless local-area network frequency bands, with a fixed first band at 2.45 GHz and a second band which can be tuned between 5.75 and 5.25 GHz.

Keywords

FilterDual bandMulti-standardStepped-impedance resonator
Type
Original Article
Information
International Journal of Microwave and Wireless Technologies , Volume 2 , Special Issue 3-4: European Microwave Week 2009 , August 2010 , pp. 245 - 253
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2010

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

[1]Castello, R.: Introduction to the special issue on wireless reconfigurable terminals. IEEE Circuits Syst. Mag., 6 (1) (2006), 7.CrossRefGoogle Scholar
[2]Ryynänen, J.; Lindfors, S.; Stadius, K.; Halonen, K.A.: Integrated circuits for multi-band multi-mode receivers. IEEE Circuits Syst. Mag., 6 (2) (2006), 5–16.CrossRefGoogle Scholar
[3]Desoli, G.; Filippi, E.: An outlook on the evolution of mobile terminals: from monolithic to modular multi-radio, multi-application platforms. IEEE Circuits Syst. Mag., 6 (2) (2006), 17–29.CrossRefGoogle Scholar
[4]Makimoto, M.; Yamashita, S.: Bandpass filters using parallel coupled stripline stepped impedance resonators. IEEE Trans. Microw. Theory Tech., 28 (12) (1980), 1413–1417.CrossRefGoogle Scholar
[5]Sagawa, M.; Makimoto, M.; Yamashita, M.: Geometrical structures and fundamental characteristics of microwave stepped-impedance resonators. IEEE Trans. Microw. Theory Tech., 45 (7) (1997), 1078–1085.CrossRefGoogle Scholar
[6]Morelli, M.; Hunter, I.; Parry, R.; Postoyalko, V.: Stopband performance improvement of rectangular waveguide filters using stepped-impedance resonators. IEEE Trans. Microw. Theory Tech., 50 (7) (2002), 1657–1664.CrossRefGoogle Scholar
[7]Mokhtaari, M.; Bornemann, J.; Amari, S.: New reduced-size step-impedance dual-band filters with enchanced bandwidth and stopband performance, in IEEE MTT-S Int. Microwave Symp. Digest, 2006, 1181–1184.Google Scholar
[8]Zhang, Y.P.; Sun, M.: Dual-band microstrip bandpass filter using stepped-impedance resonators with new coupling schemes. IEEE Trans. Microw. Theory Tech., 54 (10) (2006), 3779–3785.CrossRefGoogle Scholar
[9]Chang, S.F.; Jeng, J.H.; Chen, J.L.: Dual-band step impedance bandpass filter for multimode wireless LANs. Electron. Lett., 40 (2004), 38–39.CrossRefGoogle Scholar
[10]Quendo, C.; Rius, E.; Person, C.: Narrow bandpass filtres using dual-behavior resonators. IEEE Trans. Microw. Theory Tech., 51 (3) (2003), 734–743.CrossRefGoogle Scholar
[11]Quendo, C.; Rius, E.; Person, C.: An original topology of dual-band filter with transmission zeros, in IEEE MTT-S Int. Microwave Symp. Digest, vol. 2, 2003, 1093–1096.Google Scholar
[12]Zhang, X.Y.; Chen, J.-X.; Xue, Q.; Li, S.-M.: Dual-band bandpass filters using stub-loaded resonators. IEEE Microw. Wirel. Compon. Lett., 17 (8) (2007), 583–585.CrossRefGoogle Scholar
[13]Chen, C.-Y.; Hsu, C.-Y.: A simple and effective method for microstrip dual-band filters design. IEEE Microw. Wirel. Compon. Lett., 16 (5) (2006), 246–248.CrossRefGoogle Scholar
[14]Zhang, X.Y.; Xue, Q.: Novel centrally loaded resonators and their applications to bandpass filters. IEEE Trans. Microw. Theory Tech., 56 (4) (2008), 913–921.CrossRefGoogle Scholar
[15]Girbau, D.; Lázaro, A.; Martínez, E.; Masone, E.; Pradell, L.: Tunable dual-band bandpass filter for WLAN applications. Microw. Opt. Technol. Lett., 51 (9) (2008), 2025–2028.CrossRefGoogle Scholar
[16]Girbau, D.; Lázaro, A.; Pérez, A.; Martínez, E.; Pradell, L.; Villarino, R.: Tunable dual-band filters based on capacitive-loaded stepped-impedance resonators, in Proc. of the 38th European Microwave Conf., 2009, 113–116.CrossRefGoogle Scholar
[17]Kapilevich, B.; Lukjanets, R.: Modelling varactor tunable microstrip resonators for wireless applications. Appl. Microw. Wirel., 10 (7) (1998), 32–44.Google Scholar
[18]Girbau, D.; Lázaro, A.; Pérez, A.; Pradell, L.: Dual-band bandpass filter based on a hole resonator. Microw. Opt. Tech. Lett., 51 (7) (2009), 1649–1652.CrossRefGoogle Scholar
[19]Vizmuller, P.: RF Design Guide, Artech House, Norwood, MA, 1995.Google Scholar
[20]Misra, D.K.: Radio-Frequency and Microwave Communication Circuits: Analysis and Design, John Wiley & Sons, New York, 2001.CrossRefGoogle Scholar
[21]Lee, H.-M.; Chen, C.R.; Tsai, C.-C.; Tsai, C.-M.: Dual-band coupling and feed structure for microstrip filter design, in IEEE MTT-S Int. Microwave Symp. Digest, vol. 3, 2004, 1971–1974.Google Scholar
[22]Tsai, C.-M.; Tsai, C.-C.; Lee, S.-Y.: Nonsyncronous alternating-impedance transformers, Asia-Pacific Microw. Conf. ‘01, vol. 1, 2001, 310–313.Google Scholar