A Unified Real Frequency Technique for the Solution to Broadband Matching Problems

Ejaz, Malik Ehsan; Kılınç, Sedat; Yarman, Sıddık B.; Özoğuz, Serdar; Srivastava, Saket; Nurellari, Edmond

doi:10.1109/mms55062.2022.9825618

Cited by 2 publications

(1 citation statement)

References 5 publications

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“…A narrowband-matching approach via low quality factor values is explained in Şengül (2021a). In Wang et al (2022), a multifrequency impedance-matching broadband power amplifier is designed, and in Ejaz et al (2022), Carlin’s real frequency–line segment technique (RF–LST) (Carlin, 1977) used to design broadband-matching circuits is generalized.…”

Section: Introductionmentioning

confidence: 99%

Quality factor based transducer power gain expression

Şengül

2023

COMPEL

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Purpose In the literature, while designing broadband matching networks, transducer power gain (TPG) is used to measure the transferred power. Generally, in TPG expressions, load and back-end impedances of the matching network are used. This study aims to derive a new quality factor-based TPG expression. Design/methodology/approach In deriving the new expression, narrowband L type-matching network design approach is used and the new expression in terms of back-end quality factor, load quality factor and output port quality factor is obtained. Then, a broadband-matching network design approach using the derived TPG expression is proposed. Findings Two broadband double-matching networks are designed by using the proposed design approach using the derived TPG expression. Performances of the designed-matching networks are compared with the performances of the matching networks designed by means of simplified real frequency technique which is a well-known technique in the literature, and it is shown that they are nearly the same. Originality/value In broadband-matching problems, generally an impedance-based TPG expression is used, and it must be satisfied by the designed broadband-matching networks. But, in the literature, there is no quality factor-based TPG expression that can be used in broadband-matching problems. So, this gap in the literature has been filled by this paper.

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Section: Introductionmentioning

confidence: 99%

Quality factor based transducer power gain expression

Şengül

2023

COMPEL

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Ultra-Wideband Power Amplifier Design Strategy for 5G Sub-6-GHz Applications

2022

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This paper presents a strategy to design ultrawideband power amplifiers with a fractional bandwidth of approximately 200%. It exploits a simple output matching network, which consists of a series transmission lines together with a shunt stub, to compensate the output parasitic network of the device. Following this, a multisection transformer is implemented to obtain the optimal load at the intrinsic drain plane. As design examples, several output matching networks were designed for two different size GaN HEMT devices. One of these examples was implemented and characterized, and a drain efficiency from 52% to 70% and an output power between 40 dBm and 42.5 dBm were obtained, over 67% of the 5G sub-6-GHz band (i.e., 0.1 to 4 GHz). The aforementioned results, to the best of the authors’ knowledge, represent the state of the art in broadband power amplifiers.

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A Unified Real Frequency Technique for the Solution to Broadband Matching Problems

Cited by 2 publications

References 5 publications

Quality factor based transducer power gain expression

Quality factor based transducer power gain expression

Ultra-Wideband Power Amplifier Design Strategy for 5G Sub-6-GHz Applications

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