A novel MMIC active filter with lumped and transversal elements

Schindler, Fred; Tajima, Yusuke

doi:10.1109/mcs.1989.37262

Cited by 29 publications

(10 citation statements)

References 4 publications

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“…• Transversal and recursive analog circuits were first suggested for microwave active filter design [24], [25]. Tunable realizations were also shown later [26], [27].…”

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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“…• Transversal and recursive analog circuits were first suggested for microwave active filter design [24], [25]. Tunable realizations were also shown later [26], [27].…”

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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“…Thus, microwave active filters have been proposed to compensate these losses and improve the filter selectivity. There are 4 common active filter topologies well established, based namely in: negative resistance elements; active inductors; transversal, and recursive filters [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…One of the active bandpass filtering structures providing high-selectivity with stability without relying on high Q-factor elements is the microwave lumped and transversal bandpass filter [3]. However, due to the intrinsic nonlinearity of the active element, the filter exhibits undesirable distortion [5].…”

Section: Introductionmentioning

confidence: 99%

Improvement of gain compression in microwave lumped and transversal bandpass filters

Choi

Tam

Martins

2005

IEEE MTT-S International Microwave Symposium Digest, 2005.

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A new gain compression improvement technique for the microwave lumped and transversal bandpass filter is proposed in this paper. This technique uses active feedback for linearization of the main transversal element allowing an overall filter's P1dB elevation. In order to verify the proposed method, a prototype L-band microwave lumped and transversal bandpass filter with 2 GHz center frequency and 15% FBW is designed and fabricated. The experimental result exhibits an overall noise figure of 4.4 dB and reports a 6.5 dB P1dB improvement of the proposed filter when compared with a conventional structure. Index Terms -Active feedback, Lumped and transversal filter, Gain compression.

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“…One ofthese techniques includes the design, a1 iiiicrow aves, of recursive and transver sal filiers, which. until now, have geiierally been desigiied U' ing a tiistributed approach [3] As compared with tht: most reccntly published papers, we have presented a methodologq for filter de,,ign with no (leviation from classical low frequency principles, thus allowing a complet e and simple analysis of stability for this kind of lilters. Measurenients have bcckn presented in [2].…”

Section: Introductionmentioning

confidence: 99%

Stability diagnosis of microwave recursive structures using the NDF methodology

Billonnet

Jarry

Guillon

Proceedings of 1995 IEEE MTT-S International Microwave Symposium

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In this paper, weverifj andvalidatethe new iinportant concepts developed by A.Pl;ttzker in [ 1 J, by comparing thc NDF method to classicnl low frequency concepts which, under some assumptions. can be applied to mi( rowave recursivestructures [2]. We proceed wrththe examples of a lirst-order and a second-order iecursive fiIt~:rsandslio\;\~howtheNDF~exprt.ssio~iforthis kindof filtcx can be easily idcntitied.

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A novel MMIC active filter with lumped and transversal elements

Cited by 29 publications

References 4 publications

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

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

Improvement of gain compression in microwave lumped and transversal bandpass filters

Stability diagnosis of microwave recursive structures using the NDF methodology

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