Design and Implementation of a Wideband, Highly-Efficient, High-Power Amplifier Using Load-Pull and X-Parameters Models

Nia, Hamid Taleb-Alhagh; Javid-Hosseini, Sayyed-Hossein; Nayyeri, Vahid

doi:10.1109/tcsii.2020.2977212

Cited by 14 publications

(5 citation statements)

References 17 publications

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“…For PAE, the contour corresponding to 65 % (around 10 % lower the maximum efficiency), and for Pout, the contour corresponding to 44.5 dBm (around 1 dB lower the maximum Pout) were chosen, and the entire common region between these PAE and Pout contours was considered as design goals for the MNs. To synthesize a termination within this common region, we need first to define this region by a mathematical expression; then, it would be possible to consider a MN with an arbitrary topology having some tunable parameters (for example, a multi-section transmission line where the length and width of the sections can be tuned [22], [23], and apply an optimization algorithm to take the input impedance of the considered MN inside the defined region. To this end, the sections of PAE and Pout contours forming the borders of the common region were approximated by two arcs (of two circles) as shown in FIGURE 2 (black symbols) for the output plane.…”

Section: A Design Of the Auxiliary Amplifiermentioning

confidence: 99%

A Broadband Doherty Power Amplifier for Sub-6GHz 5G Applications

et al. 2023

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This paper presents a novel and accurate procedure for designing a Doherty power amplifier (DPA) for wireless systems. The method is based on a systematic approach to designing the matching networks of both Main and Auxiliary devices, which employs an optimization process to set their input impedance in the corresponding optimal regions obtained from standard load-and source-pull simulations. To import the optimum regions of each device into the optimization algorithm, mathematical expressions are derived and graphically reported on the Smith chart. Besides this, we have developed an accurate method to account for the loading effect of the Auxiliary amplifier on the Main one at back-off when designing the Main PA. As a proof of concept, a symmetric DPA is designed, fabricated, and tested. The measurements showed a working frequency band of 3.3 -3.9 GHz (aimed at n78 band of 5G-NR), a minimum peak output power of 36 W, drain efficiency between 48 % -53.2 % at peak and 34.6 % -44.5 % at 6 dB back-off.INDEX TERMS Doherty power amplifier, high-efficiency power amplifier, load-pull, optimization, sourcepull, wideband matching network.

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Section: A Design Of the Auxiliary Amplifiermentioning

confidence: 99%

A Broadband Doherty Power Amplifier for Sub-6GHz 5G Applications

et al. 2023

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“…In ref. [4], the X‐parameters model based on the polyharmonic distortion is utilised to design wideband PA with the FBW of 100.0%. Moreover, the DB‐PAs are reported based on T‐shaped network [5], double‐sided parallel strip line [6], real frequency and simplified real frequency technique [7], sub‐optimal matching structure [8] and tunable load matching circuit [9].…”

Section: Introductionmentioning

confidence: 99%

Dual‐band filtering power amplifier with extended passband bandwidths and wide stopband rejection

Dong

Yang

Fang

et al. 2023

IET Microwaves Antenna & Prop

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This article presents a dual‐band filtering power amplifier (DB‐FPA) with extended passband bandwidths and wide stopband rejection, which is helpful in reducing the number of microwave components in the dual‐band radio frequency front end, resulting in compact circuit size and low loss. In the designed DB‐FPA, a wideband low‐pass filter is applied as the input matching network (IMN) to provide wideband impedance matching and good stopband rejection, while a dual‐band filtering impedance transformation is adopted as the output matching network (OMN) to provide dual‐band impedance matchings and filtering responses simultaneously. Specifically, the IMN is constructed by high‐impedance transmission‐line sections and low‐impedance open‐circuit stubs. The OMN is designed based on the specific external quality factors and coupling coefficients during two bands, resulting in dual‐band impedance transformations and dual‐band filtering responses. Then, based on the above IMN and OMN, the design procedure of the presented DB‐FPA is summarised. To verify the proposed idea, a novel DB‐FPA has been fabricated and measured. During the two frequency bands, the measured maximum power added efficiencies are 55.11% and 47.78% within 33.0 dBm input power, while the measured peak gains are 15.4 and 14.0 dB within 15.0 dBm input power.

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“…Different from the above two types is the load-pull technology scans by loading different impedances on the input and output ports of transistors, and determines the optimal impedance by evaluating the performance of efficiency and output power of the PAs. Therefore, the research of wideband PAs based on load-pull technology has attracted wide attention in recent years [19,20,21,22].…”

Section: Introductionmentioning

confidence: 99%

Design of a highly efficient 0.6-4.5GHz multioctave bandwidth GaN-HEMT power amplifier

Xuan

Cheng

Zhang

et al. 2023

IEICE Electron. Express

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A methodology for designing multioctave high-efficiency power amplifiers (PA) is presented in this letter. The sequential loadpull technique (SLPT) considering the second and third harmonic characteristics is proposed and combined with the multiple frequency matching theory (MFMT) to achieve outstanding performance in terms of operating bandwidth as well as efficiency. To verify the proposed theory, a 10 W GaN HEMT device is used. The proposed PA achieves a fractional bandwidth of 152% from 0.6 to 4.5 GHz. In such a wide frequency band, the drain efficiency (DE) is measured as 50% -68% with an output power of greater than 38 dBm and a large signal gain greater than 8 dB.

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Design and Implementation of a Wideband, Highly-Efficient, High-Power Amplifier Using Load-Pull and X-Parameters Models

Cited by 14 publications

References 17 publications

A Broadband Doherty Power Amplifier for Sub-6GHz 5G Applications

A Broadband Doherty Power Amplifier for Sub-6GHz 5G Applications

Dual‐band filtering power amplifier with extended passband bandwidths and wide stopband rejection

Design of a highly efficient 0.6-4.5GHz multioctave bandwidth GaN-HEMT power amplifier

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