Flexible filters : Reconfigurable-bandwidth bandpass planar filters with ultralarge tuning ratio

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

33 Scopus Citations
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Author(s)

  • Roberto Gomez-Garcia
  • Miguel-Angel Sanchez-Soriano
  • Kam-Weng Tam
  • Quan Xue

Detail(s)

Original languageEnglish
Pages (from-to)43-54
Journal / PublicationIEEE Microwave Magazine
Volume15
Issue number5
Online published9 Jul 2014
Publication statusPublished - Jul 2014

Abstract

It is unquestionable that a great effort is currently being directed toward the implementation of fully reconfigurable and multipurpose radio-frequency (RF) systems, aimed at developing quasiuniversal high-frequency transceiver modules. Examples of modern applications demanding such vast RF frequency agility are manifold; they encompass emerging cognitive/software-defined radios and multifunction radars with dynamic spectrum access capabilities to optimize their operation [1]-[3]. As a consequence, the research into very sophisticated frequency-controllable RF/microwave electronics incorporating high levels of reconfiguration has been reactivated. High-frequency tunable filters are among the best exponents of this trend, as they are the most critical and challenging devices to perform the adaptive frequency-band selection processes needed by these systems [4], [5]. It is desirable for them to exhibit full control in terms of center frequency, bandwidth, selectivity, and even group-delay performance in their transfer functions so that RF signals with arbitrary spectral characteristics can be properly processed. Thus, out-of-system interference and noise can be efficiently removed in each situation, which ultimately results in the correct operation and high quality-ofservice (QoS) of the whole radio system. © 2014 IEEE.

Citation Format(s)

Flexible filters: Reconfigurable-bandwidth bandpass planar filters with ultralarge tuning ratio. / Gomez-Garcia, Roberto; Sanchez-Soriano, Miguel-Angel; Tam, Kam-Weng et al.
In: IEEE Microwave Magazine, Vol. 15, No. 5, 07.2014, p. 43-54.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review