Computer aided high precision darlington synthesis for real frequency matching

Yarman, Binboğa Sıddık; Aksen, Ahmet; Kopru, Ramazan; Aydın, Çağatay; Atilla, Doğu Çağdaş

doi:10.1109/benmas.2014.7529474

Cited by 5 publications

(4 citation statements)

References 13 publications

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“…If 𝐾(𝑝) refers to the source/load pull immittance, the lossless two-port will be the input/output matching network. Optimization and Synthesis are implemented under MatLab environment in a similar manner to that of [30][31][32][33][34].…”

Section: A Parametric Methods To Build a Pr Minimum Function 𝑲(𝒑) Fro...mentioning

confidence: 99%

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A GaN Microwave Power Amplifier Design Based on the Source/Load Pull Impedance Modeling via Virtual Gain Optimization

2022

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Generation of proper source/ load pull impedances for a selected GaN device is essential to design a microwave power amplifier for optimum gain and power-added efficiency. As they are obtained, these impedances may not be realizable network functions over the desired frequency band. Therefore, in this paper, first, we introduce a new method to test if the given source and load impedances are realizable. Then, a novel numerical procedure is introduced to model the source and load pull impedances as realizable network functions, which in turn results in the optimum power intake and power delivering capacity for the GaN transistor used in the design. In the numerical modelling process, a robust tool called "Virtual Gain Optimization" is presented. Numerically generated realizable source and load impedances are modelled analytically. Eventually, these impedances are synthesized using our automatic Darlington Synthesis Robot software to yield the optimum input and output matching network topologies with component values. Examples are presented to test the realizability of the given source/load pull impedance data. Then, the power intake and delivery capacity of the active device are assessed for a 10W-GaN power transistor, namely "Wolfspeed CGH40010F" over 0.8-3.0 GHz bandwidth. Eventually, the power amplifier is designed and manufactured. It is shown that the computed and the measured performance of the amplifier is very close with 10 Watts output power, 11.4 ± 0.6 dB gain and 49% to 76 % power added efficiency.

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Section: A Parametric Methods To Build a Pr Minimum Function 𝑲(𝒑) Fro...mentioning

confidence: 99%

“…14. Synthesis is completed using our "high-precision Darlington synthesis methods" presented in [30][31][32][33][34].…”

Section: A Source-pull Impedance Modelmentioning

confidence: 99%

A GaN Microwave Power Amplifier Design Based on the Source/Load Pull Impedance Modeling via Virtual Gain Optimization

2022

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“…1 and 2, respectively. Note that, the circuit topologies and element values in these schematics are yielded by the high precision synthesis codes, mentioned in [5,6], integrated with the amplifier design code.…”

Section: A All-lumped Element Amplifier Design In Matlabmentioning

confidence: 99%

Mixed element wideband microwave amplifier design via simplified real frequency technique

Kılınç

Kopru

Aksen

et al. 2014

Proceedings of 2014 Mediterranean Microwave Symposium (MMS2014)

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In this study, we illustrate the design and implementation of a wideband microwave small-signal amplifier composed of mixed elements. The design is based on Simplified Real Frequency Technique (SRFT). A design of low power amplifier circuit is completed and its simulations are performed in success. The circuit is designed with lumped elements, however, some of the lumped elements are converted to distributed elements for their convenience in production. In this way, a mixed element wideband microwave amplifier comprised of input/output matching networks with lumped and distributed elements has been formed. Layout work and also post layout simulation is given with satisfying results.

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“…For low-pass and band-pass cases, high-precision LC ladder synthesis algorithms are proposed in Kılınç and Yarman and Yarman and Kılınç, 13,14 , respectively. Also, in Yarman et al, 15 a high-precision synthesis algorithm to include the extraction of finite frequency and right half-plane (RHP) transmission zeros of an impedance function as Brune/ Darlington Type C sections are introduced.…”

Section: Introductionmentioning

confidence: 99%

Component value calculations in a mixed element ladder network containing series capacitors separated by unit elements

Şengül

Cakmak

2021

Circuit Theory & Apps

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Lossless LC ladder networks have many applications. But at high frequencies, inductor-free designs are preferred since inductors are heavy and have limited values. An additional reason for not using the inductors (at high frequencies) consists in that the values of very small inductors could be quite imprecise. If LC ladder network is high-pass type, then parallel inductors must be removed.The resulting network will have only series capacitors, which can be combined as a single series capacitor. But if commensurate transmission lines separate the series capacitors, a high-pass mixed element network is obtained. In this paper, a procedure is proposed to compute the values of series capacitors and characteristic impedances of the transmission lines in the mixed element ladder network. The usage of the procedure is explained by means of the given example.

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Computer aided high precision darlington synthesis for real frequency matching

Cited by 5 publications

References 13 publications

A GaN Microwave Power Amplifier Design Based on the Source/Load Pull Impedance Modeling via Virtual Gain Optimization

A GaN Microwave Power Amplifier Design Based on the Source/Load Pull Impedance Modeling via Virtual Gain Optimization

Mixed element wideband microwave amplifier design via simplified real frequency technique

Component value calculations in a mixed element ladder network containing series capacitors separated by unit elements

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