Wideband Two-Way Hybrid Doherty Outphasing Power Amplifier

Liang, Chenyu; Martinez-Lopez, Jose I.; Roblin, Patrick; Hahn, Yunsik; Mikrut, Dominic; Chen, Vanessa

doi:10.1109/tmtt.2020.3019430

Cited by 27 publications

(5 citation statements)

References 52 publications

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“…Then the upper and lower limit frequencies of the fourstage amplifier circuit with the same frequency are shown in equation (29).…”

Section: B Four-stage Cascaded Negative Current Feefback Ciecuit Modelmentioning

confidence: 99%

“…Immediately after, for problem (1), the highspeed movement of wireless self-networking nodes can currently be achieved by both software and hardware, and the software side can improve the threshold of the wireless networking node movement speed by changing the routing protocol of the wireless self-networking nodes, which in turn can achieve high-speed movement. The hardware side can be achieved by adding a very stable high gain antenna [24][25][26] or by adding a power amplifier [28][29] at the RF output [27] that is suitable for this self-organizing wireless node. For problem (2), it would be a great idea to use the currently existing cellular networks [30][31] and Wi-Fi self-assembling networks [32][33][34] as the basis for the study of the long-spacing transmission of wireless networking nodes.…”

Section: Introductionmentioning

confidence: 99%

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Power Amplifier Design for 25.1 km Long-Distance Transmission Under 214 km/h High-Speed Movement of Air-to-Ground Wireless Self-Assembled Network Nodes

2023

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In this paper, we design a power amplifier for this network protocol to combat the Doppler effect caused by the high-speed movement of network nodes and the rapid signal fading failure caused by the long-distance transmission of network nodes, and to extend the communication distance between network nodes, to realize the long-distance transmission under the high-speed movement of network nodes. The overall design of the power amplifier for bi-directional transmission structure, power amplifier transmitter, and low-noise amplifier receiver is used in a four-stage cascade current series negative feedback structure mode, where the signal transmitter selected RFPA5208 and MAX4003 chip, the signal receiver selected TQP3M9037 and SKY16602 chip. The above overall design enables the self-assembled nodes to ensure stable topology and achieve long-spacing transmission even in the high-speed mobile state. The test results show that the output power is 41.5dBm-44.3dBm, the gain is 44dB-45dB, and the noise is 1.6dB when the frequency band range is 2.4GHz-2.5GHz. The experimental results show that when the self-assembling nodes maintain the relative speed of 214km/h, the longest transmission distance of the point-to-point of the amorphous flat terrestrial wireless self-assembling network reaches 16300m, and the longest transmission distance of the point-to-point of the amorphous flat air-to-ground wireless self-assembling network reaches 25100m. The power amplifier designed in this paper has good application value. It provides an individual research basis for future research on the framework of a low-altitude economic fly-by-wire network.INDEX TERMS Amorphous Flat. Air-to-ground Wireless Ad-Hoc Network System. 4G/5G Bidirectional Power Amplifier. Long-Distance Transmission of Nodes. Self-organizing network nodes move at high speed

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“…Then the upper and lower limit frequencies of the fourstage amplifier circuit with the same frequency are shown in equation (29).…”

Section: B Four-stage Cascaded Negative Current Feefback Ciecuit Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Power Amplifier Design for 25.1 km Long-Distance Transmission Under 214 km/h High-Speed Movement of Air-to-Ground Wireless Self-Assembled Network Nodes

2023

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“…Power amplifier (PA), as the core module of modern wireless communication system, with its performance, for example, the output power (

P_{italicout}

) and power added efficiency (

PAE

), can greatly affect the overall performance of the entire communication systems 1–3 . Thus, in order to improve the quality of the communication system, a series of high‐performance PAs with different types of classes and topologies have been proposed over the years, such as class F, 4–7 class J, 8–10 Doherty PA, 11–15 outphasing PA, 16–18 and load modulated balanced amplifier (LMBA), 19–21 and good performance have been obtained.…”

Section: Introductionmentioning

confidence: 99%

Development and validation of a novel bias network design method for a class AB PA

Crupi

Donato

et al. 2023

Int J Numerical Modelling

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In this paper, the impact of the bias networks on a radio frequency (RF) power amplifier (PA) is analyzed and discussed comprehensively. Both the different sizes and positions of the bias microstrip line circuit have been studied for a broadband class AB PA. Both simulations and measurements show that the performance of the PA can be greatly improved with the adjustment of the bias circuit by effecting the harmonic impedance of the whole matching circuit. Compared with the existing works, the fabricated PA based on the proposed technique provides the best performance, thereby demonstrating the effectiveness of the developed bias circuit optimization method.

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“…sharing a single power amplifier (PA) across multiple channels of a transmitter can reduce the size, bandwidth, power consumption and cost of the system. For this reason, the design of power-efficient PAs that can cover multiple bands is being actively studied [4], [5], [6].…”

Section: Introductionmentioning

confidence: 99%

Analysis and Digital Predistortion of in-Band Cross Modulation in Concurrent Multi-Band Transmitters

et al. 2022

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In multiband transmitters where two or more radios share the same power amplifier (PA), interferences can usually be kept below an acceptable level with the help of multi-band digital predistortion (DPD) techniques. This article reports on novel frequency scenarios in dual-band transmitters where additional cross-modulation products not reported before, are found to overlap and interfer with both the lower and upper-band signals. These cross-modulation products arise in-band when the frequency separation between the bands is close to a sub-harmonic of the band frequencies. The leading nonlinear cross-modulation products are identified for various frequency plans and found to be of increasing order as the frequency interval between the two carriers shrinks. A PA model featuring the four leading cross-modulation products is proposed and found to exhibit an accuracy close to the measurement noise floor when applied to three different PAs. The additional in-band distortions generated by the PA under such operation cannot be filtered or compensated using conventional dual-band DPD. When using the proposed model architecture with the indirect-learning predistortion methodology for linearizing dual-band PAs, DPD is found experimentally to improve the ACPR and EVM by 25 dBc and 11 percentage points, respectively. These and the other experimental results reported indicate that the proposed linearization algorithm provides a suitable method with high efficacy for these special dual-band scenarios.

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Wideband Two-Way Hybrid Doherty Outphasing Power Amplifier

Cited by 27 publications

References 52 publications

Power Amplifier Design for 25.1 km Long-Distance Transmission Under 214 km/h High-Speed Movement of Air-to-Ground Wireless Self-Assembled Network Nodes

Power Amplifier Design for 25.1 km Long-Distance Transmission Under 214 km/h High-Speed Movement of Air-to-Ground Wireless Self-Assembled Network Nodes

Development and validation of a novel bias network design method for a class AB PA

Analysis and Digital Predistortion of in-Band Cross Modulation in Concurrent Multi-Band Transmitters

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