A Post-Matching Doherty Power Amplifier Employing Low-Order Impedance Inverters for Broadband Applications

Pang, Jingzhou; He, Songbai; Huang, Chaoyi; Dai, Zhijiang; Peng, Jun; You, Fei

doi:10.1109/tmtt.2015.2495201

Cited by 148 publications

(86 citation statements)

References 28 publications

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“…In the post-matching DPA architecture proposed in [38], the impedance matching networks of the carrier and peak- ing amplifiers are realized by simple low-pass networks in order to extend the bandwidth. Furthermore, a broadband impedance matching network is used at the output of DPA to transform the load resistance into the optimum resistance for broadband operation (Fig.…”

Section: Post-matching Dpamentioning

confidence: 99%

Breaking the Bandwidth Limit: A Review of Broadband Doherty Power Amplifier Design for 5G

2020

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Section: Post-matching Dpamentioning

confidence: 99%

Breaking the Bandwidth Limit: A Review of Broadband Doherty Power Amplifier Design for 5G

2020

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“…However, with the application of high order modulation technologies, the 6 dB OBO can no longer meet the system requirements, and the design of the DPA with extended power back‐off range is an urgent problem to be solved. In addition, as the signal bandwidth is getting larger and larger, the design of broadband DPA is also one of the research hotspots …”

Section: Introductionmentioning

confidence: 99%

“…Recently, some kinds of methods have been proposed to extend the bandwidth and OBO range of the DPA with high efficiency. In Reference , the influence of matching network on bandwidth is mainly discussed, and a structure of low‐order matching network is used to expand the bandwidth of the DPA. In addition, the influence of the noninfinite impedance of the peaking (auxiliary) amplifier on the DPA bandwidth is analyzed in detail with 6 dB OBO range in Reference .…”

Section: Introductionmentioning

confidence: 99%

“…In addition, as the signal bandwidth is getting larger and larger, the design of broadband DPA is also one of the research hotspots. [3][4][5][6][7][8][9] Recently, some kinds of methods have been proposed to extend the bandwidth and OBO range of the DPA with high efficiency. In Reference 4, the influence of matching network on bandwidth is mainly discussed, and a structure of low-order matching network is used to expand the bandwidth of the DPA.…”

Section: Introductionmentioning

confidence: 99%

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A novel design method for extending power back‐off range of broadband Doherty power amplifier

Jin

Dang

Yang

et al. 2019

Micro & Optical Tech Letters

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In this article, a novel design method for extending the output back‐off (OBO) range of the Doherty power amplifier (DPA) is proposed. The influence of the power ratio of the peaking and carrier power amplifier on the bandwidth of the DPA is analyzed in detail. With the proposed theory, the simplified estimation of the bandwidth of the DPA for a specific OBO range can be carried out. A broadband high‐efficiency DPA working from 1.8 to 2.6 GHz (33% relative bandwidth) with 9 dB OBO level is designed to verify the proposed method. According to the measured results, the DPA achieves 44.6 to 46.8 dBm saturation output power and drain efficiency (DE) of 61% to 74%. And at 9 dB OBO level, the DE varies from 50% to 63% over the operation band. Furthermore, digital predistortion (DPD) measurement results show that the linearized DPA can meet the spectral requirements for modern wireless communication systems.

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“…This results in the degradation of back-off efficiency and limits the bandwidth of the DPA. Although several designs have been proposed to extend the bandwidth [10][11][12][13][14][15][16][17][18][19][20][21][22], many of them are still complicated for realization. Recently, a novel output combiner employing a resonance LC tank was reported in the frequency band of 0.7-0.95 GHz [15].…”

Section: Introductionmentioning

confidence: 99%

A Wideband Doherty Power Amplifier With Shunted Reactive Load for Efficiency Enhancement

Kong¹,

Xia²,

Ding³

et al. 2017

PIER C

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Abstract-A highly efficient Doherty power amplifier (DPA) using shunted reactive load is designed to achieve wideband operation. For enhanced back-off efficiency over the whole bandwidth, a modified load modulation network (LMN), which employs a shunted reactive load at the combining point, was firstly designed to enlarge the effective load impedance of the carrier amplifier at low and high frequencies. Then, the two-point matching approach was employed to design the carrier and peaking output matching networks, which can eliminate the use of offset lines and simplify the LMN. Measurement results show that the designed DPA can deliver an efficiency of 48%-61% at 6 dB back-off power over the frequency band of 2.2-2.9 GHz. For a 20 MHz LTE modulated signal, an average efficiency of higher than 55% can be achieved at an average output power of 37 dBm, while the adjacent channel leakage ratio is below −49 dBc after linearization.

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A Post-Matching Doherty Power Amplifier Employing Low-Order Impedance Inverters for Broadband Applications

Cited by 148 publications

References 28 publications

Breaking the Bandwidth Limit: A Review of Broadband Doherty Power Amplifier Design for 5G

Breaking the Bandwidth Limit: A Review of Broadband Doherty Power Amplifier Design for 5G

A novel design method for extending power back‐off range of broadband Doherty power amplifier

A Wideband Doherty Power Amplifier With Shunted Reactive Load for Efficiency Enhancement

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