Configurable Independently Tunable Linearizer for Doherty Power Amplifiers

Peng, Hao; He, Songbai; You, Fei; Wu, Jiayan; Li, Chuan; Peng, Jun

doi:10.1109/lmwc.2020.3026699

Cited by 8 publications

(6 citation statements)

References 16 publications

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“…Thus, to bring the efficiency and linearity of DPAs to a fair level, linearization techniques such as DPD, RF predistortion linearizer, adding linearization amplifier, and adaptive signal separation are required. 69 There is a significant increase in the number of transmitters and subsequently the number of required PAs in the design of recent mobile communication systems that take advantage of the massive MIMO technology. Since there are nonidealities between the channels because of the fabrication mismatch and different channel responses, it's not suitable to implement conventional linearization techniques that are required to be co-designed with the PAs.…”

Section: Linearization Techniquesmentioning

confidence: 99%

“…The proposed ITL showed a significant improvement in performance while having a low cost. 69 proposed a DPA based on the ITL linearization method. Two ITLs, two variable gain amplifiers (VGAs), and a phase shifter make up the proposed ITL for DPA.…”

Section: Linearization Techniquesmentioning

confidence: 99%

“…Keeping these features on mind, one should be aware that the linearity of a PA design for high‐speed wireless communications is crucial. Thus, to bring the efficiency and linearity of DPAs to a fair level, linearization techniques such as DPD, RF predistortion linearizer, adding linearization amplifier, and adaptive signal separation are required 69 …”

Section: Broadband High‐efficiency Dpa and Linearization Techniquesmentioning

confidence: 99%

“…An independently tunable linearizer (ITL) has recently been developed by Hao et al 70 to provide continuous tuning and separate compensation of AM/AM and AM/PM distortion of PAs. The proposed ITL showed a significant improvement in performance while having a low cost 69 . proposed a DPA based on the ITL linearization method.…”

Section: Broadband High‐efficiency Dpa and Linearization Techniquesmentioning

confidence: 99%

“…A DPA with 8.5 dB back‐off is evaluated using DITL at 3.5 GHz with a bandwidth of 20 MHz in Hao et al 69 The adjacent channel power ratio (ACPR) is improved from ‐32.3 to ‐44.9 dBc. The DITL is a suitable candidate for DPAs in the 5G communication systems.…”

Section: Broadband High‐efficiency Dpa and Linearization Techniquesmentioning

confidence: 99%

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A review of Doherty power amplifier and load modulated balanced amplifier for 5G technology

Makhsuci

Navidi

Sanduleanu

et al. 2023

Circuit Theory & Apps

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In this paper, functionality of the Doherty power amplifiers (DPAs) along with their design constraints such as DPA combining techniques are reviewed. This is because power amplifier (PA) is a key building block in the design of fifth generation (5G) communication systems. A significant trend is the DPA bandwidth enhancement technique, which is the subject of numerous papers in the literature. So, we will review some papers with different solutions to address DPA's bandwidth limitations. There are also different works in the literature that have focused on high-efficiency PA structure designs, which are also discussed in this paper. An excellent option for effective power combining in broadband designs is using balanced amplifiers. We have discussed load modulated balanced amplifiers (LMBA) in this paper because designing an effective PA with a wide bandwidth is crucial. We also covered some papers that have proposed techniques based on the linearization method to bring the efficiency and linearity of DPAs to a fair level. K E Y W O R D SDoherty power amplifier, energy efficiency, fifth generation (5G), linearization, peak to average power ratio (PAPR), quasi-balanced Doherty power amplifier (QB-DPA)

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Section: Linearization Techniquesmentioning

confidence: 99%

Section: Linearization Techniquesmentioning

confidence: 99%

Section: Broadband High‐efficiency Dpa and Linearization Techniquesmentioning

confidence: 99%

Section: Broadband High‐efficiency Dpa and Linearization Techniquesmentioning

confidence: 99%

Section: Broadband High‐efficiency Dpa and Linearization Techniquesmentioning

confidence: 99%

See 3 more Smart Citations

A review of Doherty power amplifier and load modulated balanced amplifier for 5G technology

Makhsuci

Navidi

Sanduleanu

et al. 2023

Circuit Theory & Apps

View full text Add to dashboard Cite

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Class iCGF^–1 Mode Power Amplifier for Enhancing the Linearity of the Traditional Continuous Class F^–1 Mode

Li,

Yu,

Liu

2024

Circuit Theory & Apps

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In this paper, the iCGF−1 mode is proposed to compensate the amplitude‐to‐amplitude modulation (AM/AM) distortion of the traditional continuous class F−1 mode while maintaining the high efficiency. The AM/AM profile of the iCGF−1 mode is mathematically expressed simultaneously as a function of the input nonlinearity parameter and conduction angle , which makes the iCGF−1 mode more flexible in controlling the AM/AM profile. The first inflection point of the AM/AM profile can be moved to a higher output power level through theoretical deduction by adjusting the second harmonic source impedance and gate bias voltage to increase the values of and . This flattens the AM/AM profile while the efficiency profile remains almost the same as that of the traditional continuous class F−1 mode. The performance of the iCGF−1 mode is verified through simulation and experimental measurements. The iCGF−1 PA is fabricated with CGH40010F and has a frequency range of 2–2.6 GHz. The drain efficiency is 70.1%–77.9%, and the output power is 41.1–41.7 dBm. The linearity is tested with a 100 MHz 5G NR signal (the peak average power ratio (PAPR) is 8.5 dB) at 2.3 GHz. The worst adjacent channel power ratio (ACPR) is −32.3 dBc without digital predistortion (DPD) and −52.1 dBc with DPD. The results show that the iCGF−1 mode has successfully compensated the AM/AM distortion of the traditional continuous class F mode and maintaining high efficiency.

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A Tri-Branch Analog Pre-Distortion Linearizer for the Compensation of Gain Inflection in Doherty Power Amplifiers

Pitt,

Beach,

Cappello

2024

2024 IEEE/MTT-S International Microwave Symposium - IMS 2024

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Configurable Independently Tunable Linearizer for Doherty Power Amplifiers

Cited by 8 publications

References 16 publications

A review of Doherty power amplifier and load modulated balanced amplifier for 5G technology

A review of Doherty power amplifier and load modulated balanced amplifier for 5G technology

Class iCGF^–1 Mode Power Amplifier for Enhancing the Linearity of the Traditional Continuous Class F^–1 Mode

A Tri-Branch Analog Pre-Distortion Linearizer for the Compensation of Gain Inflection in Doherty Power Amplifiers

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Configurable Independently Tunable Linearizer for Doherty Power Amplifiers

Cited by 8 publications

References 16 publications

A review of Doherty power amplifier and load modulated balanced amplifier for 5G technology

A review of Doherty power amplifier and load modulated balanced amplifier for 5G technology

Class iCGF–1 Mode Power Amplifier for Enhancing the Linearity of the Traditional Continuous Class F–1 Mode

A Tri-Branch Analog Pre-Distortion Linearizer for the Compensation of Gain Inflection in Doherty Power Amplifiers

Contact Info

Product

Resources

About

Class iCGF^–1 Mode Power Amplifier for Enhancing the Linearity of the Traditional Continuous Class F^–1 Mode