Broadband high PAE GaN push-pull power amplifier for 500MHz to 2.5 GHz operation

Yan, Jonmei J.; Hong, Young-Pyo; Shinjo, Shintaro; Mukai, Kazuo; Asbeck, P.M.

doi:10.1109/mwsym.2013.6697741

Cited by 14 publications

(7 citation statements)

References 7 publications

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“…The proposed stairwell PL model has the greatest prediction's accuracy, having the smallest mean error and standard deviation values as presented in Table 3. The measured standard deviations at site 5 and site 6 also do not exceed the shadowing parameter introduced in (11). The results demonstrate the soundness of the proposed model when predicting PL at various frequency bands within the 0.7 GHz and 2.5 GHz spectrum along the multifloor stairwell.…”

Section: Comparison Of Proposed and Standard Modelssupporting

confidence: 54%

“…The need to predict PL proficiently for a given scenario at different operating frequency bands arises because contemporary and future communication system providers use different bands that cover a wide frequency spectrum [11]. Furthermore, since small cells and carrier aggregation ability are the features to be supported by upcoming cellular system [12], radio characterization for a wide frequency range will aid in the design and deployment of these wireless networks.…”

Section: Introductionmentioning

confidence: 99%

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Modelling the Impact of Operating Frequencies on Path Loss and Shadowing Along Multi-Floor Stairwell for 0.7 GHZ-2.5 GHZ Range

Aziz¹,

Rahman²

2014

PIER M

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Abstract-Given that building occupants and more importantly public safety personnel regularly use stairwell to move about different floors in a multi-floor building, wireless network coverage for the setting may come as necessary in order to ensure seamless telecommunication connectivity. Nevertheless, wireless network planning pertaining to multi-floor stairwell scenario requires unique radio characterization since the scenario is different from other indoor environments. This paper presents a frequency dependent path loss and shadowing model for the multi-floor stairwell environment that was developed and tested at six dog-leg style stairwells. The empirical model covers frequency spectrum from 0.7 GHz up to 2.5 GHz which envelop numerous public safety and long term evolution operating bands. The model demonstrates good precision and is shown to outperform standard path loss model when comparison was made since it includes site-specific parameters describing radio characteristics natural to stairwell setting. The straightforward mathematical expression of the model can easily be applied when setting up or studying wireless network for the stipulated frequency range with respect to multi-floor stairwell.

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Section: Comparison Of Proposed and Standard Modelssupporting

confidence: 54%

Section: Introductionmentioning

confidence: 99%

Modelling the Impact of Operating Frequencies on Path Loss and Shadowing Along Multi-Floor Stairwell for 0.7 GHZ-2.5 GHZ Range

Aziz¹,

Rahman²

2014

PIER M

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“…In wideband applications, linear classes, such as Class-A, Class-B, and Class-AB, are widely employed because they provide appropriate bandwidths and acceptable signal gains [4]- [5], but their efficiency is not as high as that of harmonictuned classes, such as Class-E and Class-F [6]- [7]. Various aspects resulting from recent research on broadband PAs are summarized in Table 1.…”

Section: Introductionmentioning

confidence: 99%

“…In other words, how to achieve high efficiency. At the same time, gain variation throughout the band causes more challenges for modern signal modulation techniques, such as quadrature amplitude modulation.In wideband applications, linear classes, such as Class-A, Class-B, and Class-AB, are widely employed because they provide appropriate bandwidths and acceptable signal gains [4]- [5], but their efficiency is not as high as that of harmonictuned classes, such as Class-E and Class-F [6]- [7]. Various aspects resulting from recent research on broadband PAs are summarized in Table 1.…”

mentioning

confidence: 99%

Systematic Approach for Design of Broadband, High Efficiency, High Power RF Amplifiers

Mohadeskasaei¹,

An²,

Chen³

et al. 2017

ETRI J

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This paper demonstrates a systematic approach for the design of broadband, high efficiency, high power, Class-AB RF amplifiers with high gain flatness. It is usually difficult to simultaneously achieve a high gain flatness and high efficiency in a broadband RF power amplifier, especially in a high power design. As a result, the use of a computer-aided simulation is most often the best way to achieve these goals; however, an appropriate initial value and a systematic approach are necessary for the simulation results to rapidly converge. These objectives can be accomplished with a minimum of trial and error through the following techniques. First, signal gain variations are reduced over a wide bandwidth using a proper pre-matching network. Then, the source and load impedances are satisfactorily obtained from small-signal and load-pull simulations, respectively. Finally, two highorder Chebyshev low-pass filters are employed to provide optimum input and output impedance matching networks over a bandwidth of 100 MHz-500 MHz. By using an EM simulation for the substrate, the simulation results were observed to be in close agreement with the measured results.Keywords: Broadband, Class-AB, Matching network, Power amplifier. Manuscript received June 28, 2016; revised Oct. 7, 2016; accepted Oct. 17, 2016. Seyed Alireza Mohadeskasaei (corresponding author, alireza.kasaee@gmail.com), Jianwei An (ajw626@126.com), Yueyun Chen (chenyy@ustb.edu.cn), Zhi Li (lizhi870218@gmail. com), Sani Umar Abdullahi (umarsani@gmail.com), and Tie Sun (suntie1605@163.com) are with the Department of Communication, School of Computer and Communication, University of Science and Technology Beijing, China. This is an Open Access article distributed under the term of Korea Open Government License (KOGL) Type 4: Source Indiction + Commercial Use Prohibition + Change Prohibition (http://www.kogl.or.kr/news/dataFileDown.do?dataIdx=71&dataFileIdx=2). I. IntroductionPower amplifiers (PAs) are one of the most significant ingredients of many communication systems. Four important requirements, namely, the efficiency, linearity, low noise, and broadband frequency response, must be considered when designing PAs [1]- [3]. For broadband power amplifiers, one of the most difficult challenges lies in determining how to achieve a high signal gain and high power level while maintaining a low power dissipation. In other words, how to achieve high efficiency. At the same time, gain variation throughout the band causes more challenges for modern signal modulation techniques, such as quadrature amplitude modulation.In wideband applications, linear classes, such as Class-A, Class-B, and Class-AB, are widely employed because they provide appropriate bandwidths and acceptable signal gains [4]- [5], but their efficiency is not as high as that of harmonictuned classes, such as Class-E and Class-F [6]- [7]. Various aspects resulting from recent research on broadband PAs are summarized in Table 1. According to this table, a Class-F PA exhibits a high power-added efficiency (P...

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“…Introduction: Compared with various power amplifier (PA) topologies, including single-ended PA, in-phase power combining PA and balanced PA, the push-pull PA (PPPA) topology, where two transistors are operating at 180°out of phase, can ideally provide zero even-order harmonics at output port, which makes it suitable for practical system design [1]. The main challenge of PPPA in microwave frequency is the design of unbalanced-to-balanced transformers, which are already realised by ferrite-less coaxial cable baluns [2], rat-race microstrip baluns [3], broadband Marchand baluns [4] as well as planar PCB integrated baluns [5]. However, these baluns introduced in [2][3][4][5] cannot provide flexible impedance transformation ratios, especially the large one.…”

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confidence: 99%

Filtering push–pull power amplifier based on novel impedance transformers

Zhang

Dong

et al. 2016

Electron. lett.

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A novel filtering push-pull power amplifier (PPPA), based on unbalanced-to-balanced impedance transformers, is presented for the first time. This novel impedance transformer can not only simplify the PPPA topology and miniaturise the overall circuit size, but also provide the bandpass filtering response and improve the second harmonic suppression performance. The proposed impedance transformers, which are constructed by two different C-type line resonators, can provide good impedance matching performance under the odd-mode excitation, while achieve high common mode suppression under the even-mode excitation. Finally, a PPPA is designed and fabricated with the centre frequency of 2.45 GHz and bandwidth of 200 MHz for WLAN application. Moreover, detailed explanation and measured results are demonstrated for verification.

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Broadband high PAE GaN push-pull power amplifier for 500MHz to 2.5 GHz operation

Cited by 14 publications

References 7 publications

Modelling the Impact of Operating Frequencies on Path Loss and Shadowing Along Multi-Floor Stairwell for 0.7 GHZ-2.5 GHZ Range

Modelling the Impact of Operating Frequencies on Path Loss and Shadowing Along Multi-Floor Stairwell for 0.7 GHZ-2.5 GHZ Range

Systematic Approach for Design of Broadband, High Efficiency, High Power RF Amplifiers

Filtering push–pull power amplifier based on novel impedance transformers

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