FSRFT—Fast Simplified Real Frequency Technique via Selective Target Data Approach for Broadband Double Matching

Kopru, Ramazan

doi:10.1109/tcsii.2016.2557238

Cited by 17 publications

(24 citation statements)

References 14 publications

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“…The polynomial must be a strictly Hurwitz polynomial for obtaining realizable networks and can be obtained from even polynomial by where is the 1 st coefficient of the polynomial and Matlab command represents a polynomial constructed of left half plane roots selected among the roots of the polynomial . is written in a form of [1,7], (7)  Compute scattering matrix in Belevitch form by (8) where is unimodular constant ( ) [1,7]. In SRFT formalism, the ultimate aim of designing an equalizer is to be able to optimize the coefficients of the numerator polynomial of the input reflection function (9)  Compute the gain via (10)…”

Section: ) Optimization Functionmentioning

confidence: 99%

“…where (13) and 14where are the elements of the unitnormalized scattering matrix of the equalizer E. and are generator and load reflectances expressed in terms of generator and load impedances and [1,7]. and are input and output reflectance functions, respectively, seen at the related port of the matching network when the other port is terminated with and , respectively [1,21]. A much simpler and handy impedance based gain formulae which are equivalent to the reflectance based gain formulae given in (10) and (11) can also be used to calculate the gain such that [21]…”

Section: ) Optimization Functionmentioning

confidence: 99%

“…Organization of this paper is as follows: Section II gives a short review of broadband DM technique based on FSRFT as described in [1]. Section III introduces the newly proposed simple PED to be equipped into the FSRFT.…”

Section: Introductionmentioning

confidence: 99%

“…Section IV presents a bandpass broadband DM design example solved via the FSRFT equipped with PED feature. Since a vast review of both SRFT and FSRFT has already been given in section II and section III of [1], those who are not familiar with SRFT and FSRFT, are recommended to consult to [1] for a much more detailed knowledge. Thus, only some summarized parts of FSRFT taken from [1] are given in the following section.…”

Section: Introductionmentioning

confidence: 99%

“…: .  optimization ends with success, , yielding optimized polynomial such that .is known as 'sum of squared errors'[1].…”

mentioning

confidence: 99%

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FSRFT Based Broadband Double Matching via Passband Extremums Determination

Kopru

2018

Balkan Journal of Electrical and Computer Engineering

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Fast simplified real frequency technique (FSRFT) is a numerical solver used to solve microwave broadband doublematching (DM) circuit design problems in a much faster and effective manner. Recently, it has been reported that an FSRFT based Matlab code can complete the design of a order lowpass lumped element double matching network to match a given generator and load impedance within an optimization time of only 0.6 seconds, a 47 fold less time than that of the same design done using the classical simplified real frequency technique (SRFT). FSRFT owes this superior speed performance to the fact that it tracks only (system unknowns plus 1) number of passband extremum points selected from among the number of gain data (). This work introduces a simple numerical technique called PED (passband extremums determination technique) to be used in determination of these passband extremum points (PEs). An exemplary order microwave bandpass DM circuit design using FSRFT based Matlab (of Mathworks Inc.) code and the simulation of this design via MWO (of AWR Corp.) has yielded the same circuit performance with an exact agreement. Thus, FSRFT, equipped with the PED, newly proposed hereby, might be used as a powerful solver in designing broadband circuits in many fields such as RF/microwave, radar, and communications.

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Section: ) Optimization Functionmentioning

confidence: 99%

Section: ) Optimization Functionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…: .  optimization ends with success, , yielding optimized polynomial such that .is known as 'sum of squared errors'[1].…”

mentioning

confidence: 99%

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FSRFT Based Broadband Double Matching via Passband Extremums Determination

Kopru

2018

Balkan Journal of Electrical and Computer Engineering

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Efficient Amplification of Large‐Signal Spoof Surface Plasmon Polaritons in a Subwavelength Size

Liao,

Wu,

Guo

et al. 2024

Adv Materials Technologies

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The advancement of communication systems demands ever‐smaller sizes, leading to the integration of more circuits in compact forms. A promising solution lies in Spoof Surface Plasmon Polaritons (SSPPs), which enable strong confinement, low interference, and a significant wave vector, thereby facilitating smaller sizes. However, the amplification of large plasmonic signals in a compact size remains a daunting scientific challenge for the further development of SSPPs communication systems. In this study, this challenge is tackled by selecting GaN High Electron Mobility Transistors (HEMTs) and load/source‐pull technologies. To ensure efficient operation, impedance‐matching networks are designed, resulting in a remarkably small amplifier structure. The approach involves utilizing the Bayesian optimization (BO) algorithm to fine‐tune the matching network, leading to exceptional amplification performance. The results obtained in the frequency range of 1–3 GHz are highly promising, with both simulated and measured results demonstrating an impressive output power exceeding 40 dBm, a power added efficiency (PAE) surpassing 60%, and a gain exceeding 10 dB. These remarkable achievements underscore the viability of amplifying large‐signal SSPPs and outputting high‐power SSPPs waves within a subwavelength size, opening exciting possibilities for SSPPs communication, sensing, and imaging systems.

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A broadband continuous class‐B/J power amplifier with novel output matching network

Cai,

Yao,

Liu

et al. 2024

Circuit Theory & Apps

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This paper presents a broadband continuous class‐B/J power amplifier (PA) based on a novel output matching network (OMN). In order to realize a compact and broadband OMN design, a multiband harmonic control network (MHCN) with a simple structure consisting of a combination of open‐circuited stubs and a microstrip radial stub (MRS) is designed, which is capable of tuning the second harmonic impedance at the upper and lower sideband frequencies and at the center frequency well and consumes low power. Also, a fundamental matching network (FMN) is designed by means of the simplified real frequency technique (SRFT) algorithm of the computer‐aided program, which improves the efficiency of the circuit design. Both of them satisfy the requirements of a wideband PA and enhance the frequency‐selective performance of the OMN. For validation purposes, practical measurements of the designed and fabricated continuous class‐B/J PA with size of 61 × 51 mm2 have been carried out. The results show that at an operating frequency of 2.4–4.4 GHz, the 53%–73% drain efficiency (DE) at the output power of 38.4–42.4 dBm, and the maximum gain is 13.3 dB.

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FSRFT—Fast Simplified Real Frequency Technique via Selective Target Data Approach for Broadband Double Matching

Cited by 17 publications

References 14 publications

FSRFT Based Broadband Double Matching via Passband Extremums Determination

FSRFT Based Broadband Double Matching via Passband Extremums Determination

Efficient Amplification of Large‐Signal Spoof Surface Plasmon Polaritons in a Subwavelength Size

A broadband continuous class‐B/J power amplifier with novel output matching network

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