A folded edge-coupled transformer balun in GaAs with excellent balance from 9 to 20 GHz

Sudipta Chakraborty; Leigh E. Milner; Anthony Parker; Michael Heimlich

doi:10.23919/EuMC.2018.8541427

A folded edge-coupled transformer balun in GaAs with excellent balance from 9 to 20 GHz

Sudipta Chakraborty, Leigh E. Milner, Anthony Parker, Michael Heimlich

School of Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

5 Citations (Scopus)

Abstract

A folded edge-coupled transformer balun is presented with excellent balance and 3-dB bandwidth from 9 to 20 GHz. Three structures were simulated; straight, folded, spiralled; to study the trade-off between the circuit size and balance performance. A simplified lumped equivalent circuit model of the transformer balun is also shown. The transformer balun was implemented with two-port characterization structures to accurately measure the balance. The measured magnitude and phase imbalances are less than 0.3 dB and 0.7° from 2 to 25 G Hz, surpassing previously reported results for GaAs baluns. The balun was fabricated in a 0.1 mu mathrm{m} GaAs pHEMT technology and occupies 0.24 mm² . This paper also highlights that the edge-coupling is preferred for GaAs technology baluns due to restrictions in metal fabrication.

Original language	English
Title of host publication	2018 48th European Microwave Conference proceedings
Place of Publication	Piscataway, NJ
Publisher	Institute of Electrical and Electronics Engineers (IEEE)
Pages	1101-1104
Number of pages	4
ISBN (Electronic)	9782874870514, 9782874870507
ISBN (Print)	9781538652855
DOIs	https://doi.org/10.23919/EuMC.2018.8541427
Publication status	Published - 2018
Event	48th European Microwave Conference, EuMC 2018 - Madrid, Spain Duration: 25 Sept 2018 → 27 Sept 2018

Conference

Conference	48th European Microwave Conference, EuMC 2018
Country/Territory	Spain
City	Madrid
Period	25/09/18 → 27/09/18

Keywords

Transformer balun
GaAs
bandwidth
magnitude and phase imbalance

Access to Document

10.23919/EuMC.2018.8541427

Cite this

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title = "A folded edge-coupled transformer balun in GaAs with excellent balance from 9 to 20 GHz",

abstract = " A folded edge-coupled transformer balun is presented with excellent balance and 3-dB bandwidth from 9 to 20 GHz. Three structures were simulated; straight, folded, spiralled; to study the trade-off between the circuit size and balance performance. A simplified lumped equivalent circuit model of the transformer balun is also shown. The transformer balun was implemented with two-port characterization structures to accurately measure the balance. The measured magnitude and phase imbalances are less than 0.3 dB and 0.7° from 2 to 25 G Hz, surpassing previously reported results for GaAs baluns. The balun was fabricated in a 0.1 mu mathrm{m} GaAs pHEMT technology and occupies 0.24 mm2 . This paper also highlights that the edge-coupling is preferred for GaAs technology baluns due to restrictions in metal fabrication. ",

keywords = "Transformer balun, GaAs, bandwidth, magnitude and phase imbalance",

author = "Sudipta Chakraborty and Milner, {Leigh E.} and Anthony Parker and Michael Heimlich",

year = "2018",

doi = "10.23919/EuMC.2018.8541427",

language = "English",

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pages = "1101--1104",

booktitle = "2018 48th European Microwave Conference proceedings",

publisher = "Institute of Electrical and Electronics Engineers (IEEE)",

address = "United States",

note = "48th European Microwave Conference, EuMC 2018 ; Conference date: 25-09-2018 Through 27-09-2018",

}

Chakraborty, S, Milner, LE, Parker, A & Heimlich, M 2018, A folded edge-coupled transformer balun in GaAs with excellent balance from 9 to 20 GHz. in 2018 48th European Microwave Conference proceedings. Institute of Electrical and Electronics Engineers (IEEE), Piscataway, NJ, pp. 1101-1104, 48th European Microwave Conference, EuMC 2018, Madrid, Spain, 25/09/18. https://doi.org/10.23919/EuMC.2018.8541427

A folded edge-coupled transformer balun in GaAs with excellent balance from 9 to 20 GHz. / Chakraborty, Sudipta; Milner, Leigh E.; Parker, Anthony et al.
2018 48th European Microwave Conference proceedings. Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE), 2018. p. 1101-1104.

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

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T1 - A folded edge-coupled transformer balun in GaAs with excellent balance from 9 to 20 GHz

AU - Chakraborty, Sudipta

AU - Milner, Leigh E.

AU - Parker, Anthony

AU - Heimlich, Michael

PY - 2018

Y1 - 2018

N2 - A folded edge-coupled transformer balun is presented with excellent balance and 3-dB bandwidth from 9 to 20 GHz. Three structures were simulated; straight, folded, spiralled; to study the trade-off between the circuit size and balance performance. A simplified lumped equivalent circuit model of the transformer balun is also shown. The transformer balun was implemented with two-port characterization structures to accurately measure the balance. The measured magnitude and phase imbalances are less than 0.3 dB and 0.7° from 2 to 25 G Hz, surpassing previously reported results for GaAs baluns. The balun was fabricated in a 0.1 mu mathrm{m} GaAs pHEMT technology and occupies 0.24 mm2 . This paper also highlights that the edge-coupling is preferred for GaAs technology baluns due to restrictions in metal fabrication.

AB - A folded edge-coupled transformer balun is presented with excellent balance and 3-dB bandwidth from 9 to 20 GHz. Three structures were simulated; straight, folded, spiralled; to study the trade-off between the circuit size and balance performance. A simplified lumped equivalent circuit model of the transformer balun is also shown. The transformer balun was implemented with two-port characterization structures to accurately measure the balance. The measured magnitude and phase imbalances are less than 0.3 dB and 0.7° from 2 to 25 G Hz, surpassing previously reported results for GaAs baluns. The balun was fabricated in a 0.1 mu mathrm{m} GaAs pHEMT technology and occupies 0.24 mm2 . This paper also highlights that the edge-coupling is preferred for GaAs technology baluns due to restrictions in metal fabrication.

KW - Transformer balun

KW - GaAs

KW - bandwidth

KW - magnitude and phase imbalance

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T2 - 48th European Microwave Conference, EuMC 2018

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ER -

A folded edge-coupled transformer balun in GaAs with excellent balance from 9 to 20 GHz

Abstract

Conference

Keywords

Access to Document

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Technology optimisation of integrated circuits with applications to wireless communication systems in medicine

Cite this

A folded edge-coupled transformer balun in GaAs with excellent balance from 9 to 20 GHz

Abstract

Conference

Keywords

Access to Document

Other files and links

Fingerprint

Projects

Technology optimisation of integrated circuits with applications to wireless communication systems in medicine

Cite this