MMIC active filter with tuned transversal element

Tam, Kam Weng; Vitor, P.; Martins, Rui P.

doi:10.1109/82.673646

Cited by 20 publications

(3 citation statements)

References 5 publications

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“…Tunable realizations were also shown later [26], [27]. They were mostly conceived for wideband bandpass applications by means of the direct matching of the rational transfer function of an associated finite-impulse-response (FIR)-transversal scheme-or infinite-impulse-response (IIR)-recursive scheme-digital filter into a high-frequency structure.…”

Section: Introductionmentioning

confidence: 99%

A Digital Interpretation of Frequency-Periodic Signal-Interference Microwave Passive Filters

Muñoz‐Ferreras

Gómez‐García

2014

IEEE Trans. Microwave Theory Techn.

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This paper addresses, for the first time, the digital representation of spectrally periodic signal-interference microwave passive filters. Starting from the theoretical rational transfer function of a synthesized transmission-line signal-interference analog filter, the real-valued coefficients of its digital-domain filter counterpart are derived. This discrete-time formulation for this type of microwave filters allows to clarify some confusing concepts into them, such as filter order. Moreover, some particular phenomena observed in associated experimental proof-of-concept planar prototypes, such as the appearance of out-of-band/spurious resonance peaks, are also explained by this study as zero-pole quasi-cancellations. In addition, it is demonstrated here that the use of the adjective "transversal" for this class of microwave passive filters could be no rigorous as it is understood in a digital sense since its discrete-time modeling commonly obeys an infinite-impulse-response structure. For validation, the expounded theoretical framework is applied to three examples of signal-interference passive filters exhibiting quasi-elliptic-type single-passband, six-passband, and low-pass responses.

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Section: Introductionmentioning

confidence: 99%

A Digital Interpretation of Frequency-Periodic Signal-Interference Microwave Passive Filters

Muñoz‐Ferreras

Gómez‐García

2014

IEEE Trans. Microwave Theory Techn.

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“…Indeed, such an alternative discrete-element version is more suitable for low/mediumfrequency ranges and MMICs technologies, where the transmission line becomes a bulky element to be integrated [5]- [7]. Following this purpose, Fig.…”

Section: Theory Of the Lumped-element-based Transversal Filteringmentioning

confidence: 97%

A type of lumped-element-based analog filters based on transversal circuit networks

Loeches-Sánchez

Gómez‐García

2013

2013 IEEE International Symposium on Circuits and Systems (ISCAS2013)

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A novel technique to design lumped-element-based analog filters is presented. It exploits the application of signalinterference principles to a class of transversal filtering section made up of two in-parallel discrete-element transmission lines. This circuit network, through destructive and constructive signalenergy interactions, enables high-selectivity filtering actions to be generated. Moreover, this can be done in the same circuit topology independently of the type of transfer function to be synthesized. Design equations and guidelines for this lumped-element analog filter approach are given. Besides, for experimental validation, simulation results of two synthesis examples consisting of a lowpass and a bandpass filter implemented at the layout level are shown.

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“…Fundamental concepts for designing tunable BPFs have been presented in while active designs for RF applications have also been considered . This letter presents a novel low‐cost second‐order top L‐coupled tunable BPF designed using discrete component s with an increased operational tuning range when compared to existing designs.…”

Section: Design and Simulationmentioning

confidence: 99%

A Broadband Tunable Band‐Pass Filter for RF Characterization Within TETRA and LTE Bands

Guo

Rigelsford

2013

Micro & Optical Tech Letters

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This article presents a broadband tunable band‐pass filter which operates between 380 and 960 MHz covering the trans‐European trunked radio, AMPS, GSM900, and long‐term evolution “whitespace” bands. The design has an increased operational tuning range when compared to existing designs and is suitable for low‐cost wireless spectrum bandwidth expansion analysis and spectral efficiency analysis. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2847–2849, 2013

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MMIC active filter with tuned transversal element

Cited by 20 publications

References 5 publications

A Digital Interpretation of Frequency-Periodic Signal-Interference Microwave Passive Filters

A Digital Interpretation of Frequency-Periodic Signal-Interference Microwave Passive Filters

A type of lumped-element-based analog filters based on transversal circuit networks

A Broadband Tunable Band‐Pass Filter for RF Characterization Within TETRA and LTE Bands

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