A Doherty Architecture With High Feasibility and Defined Bandwidth Behavior

Giofrè, Rocco; Piazzon, Luca; Colantonio, Paolo; Giannini, F.

doi:10.1109/tmtt.2013.2274432

Cited by 58 publications

(43 citation statements)

References 29 publications

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“…18 common wireless systems (i.e. ACLR< -45 dBc), digital predistortion (DPD) technique has been widely used to improve the linearity of the DPAs when they are excited by wideband modulated signals [2], [4], [6], [12], [14]- [17], [21].…”

Section: B Measurement Results With Modulated Signalsmentioning

confidence: 99%

A Broadband High-Efficiency Doherty Power Amplifier With Integrated Compensating Reactance

Xia

Yang

Guo

et al. 2016

IEEE Trans. Microwave Theory Techn.

129

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Section: B Measurement Results With Modulated Signalsmentioning

confidence: 99%

A Broadband High-Efficiency Doherty Power Amplifier With Integrated Compensating Reactance

Xia

Yang

Guo

et al. 2016

IEEE Trans. Microwave Theory Techn.

129

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“…Beyond this, the use of non-conventional output combiners [77][78][79] or the application of the real frequency technique [80] to the design of the output matching networks [75] is proven to be able to further improve DPA bandwidth. In the modified DPA proposed in [46,81], enhancement of DPA bandwidth is obtained by modifying the characteristic impedance Z ∞ of the IIN transformer.…”

Section: Bandwidthmentioning

confidence: 99%

High Efficiency Power Amplifiers for Modern Mobile Communications: The Load-Modulation Approach

et al. 2017

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Abstract:Modern mobile communication signals require power amplifiers able to maintain very high efficiency in a wide range of output power levels, which is a major issue for classical power amplifier architectures. Following the load-modulation approach, efficiency enhancement is achieved by dynamically changing the amplifier load impedance as a function of the input power. In this paper, a review of the widely-adopted Doherty power amplifier and of the other load-modulation efficiency enhancement techniques is presented. The main theoretical aspects behind each method are introduced, and the most relevant practical implementations available in recent literature are reported and discussed.

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“…In past literatures, many designs and implementations of dual-band Doherty architecture [6][7][8] and broadband Doherty amplifier [9][10][11][12][13][14][15][16][17] have been reported. It is worth mentioning that dual-band technologies have the limitation of a high frequency-ratio, while in practical situation, taking China Mobile for instance, the frequency-ratio of 2G standard (GSM1800) and 3G standard (TD-SCDMA) is only about 1.11.…”

Section: Introductionmentioning

confidence: 99%

“…A comprehensive method, real frequency technique, for broadband Doherty PA designing is proposed in [16] and a calculated fractional bandwidth of 29.5% is achieved. A novel output combining network -four sections of quarter-wave transmission lines, is adopted in [14]. A 14% of fractional bandwidth is achieved using this structure.…”

Section: Introductionmentioning

confidence: 99%

“…A 14% of fractional bandwidth is achieved using this structure. Authors in [15] explored an evolution of the network in [14], thus achieving a Doherty PA with a 36% fractional bandwidth. A novel output compensator network is exploited in wideband DPA design in [12], where a fractional bandwidth of 18.2% is achieved, at a center frequency of 3.3 GHz.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Tradeoff Design of Broadband Power Amplifier in Doherty Configuration Utilizing a Novel Coupled-Line Coupler

Ye¹,

Wu²,

Liu³

2014

PIER C

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Abstract-A broadband power amplifier designed and implemented in Doherty configuration is illustrated in this paper. Both input and output networks adopt the broadband matching topology. Additionally a compensation network, consisting of a series transmission line shunted with a capacitance, is set behind the peak amplifier to avoid in-band power leakage in the low-power section while at the cost of peak output power in partial band. A novel coupler is designed as an uneven power-divided splitter and experimentally validated for a broadband power amplifier module. A tradeoff of bandwidth, efficiency and output power is fulfilled through parameters select and postproduction tuning. According to the measured results, the proposed broadband Doherty power amplifier achieves an average saturated output power of 42 dBm, an average gain of 10.6 dB, an average peak and 6 dB back-off efficiency of 48.4% and 32.8%, respectively, and a fractional bandwidth of 51.4%, from 1.3 GHz to 2.2 GHz. The adjacent channel power ratio is better than −40 dBc when the amplifier is driven with 10-MHz QPSK signal, thus exhibiting a high linearity performance.

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A Doherty Architecture With High Feasibility and Defined Bandwidth Behavior

Cited by 58 publications

References 29 publications

A Broadband High-Efficiency Doherty Power Amplifier With Integrated Compensating Reactance

A Broadband High-Efficiency Doherty Power Amplifier With Integrated Compensating Reactance

High Efficiency Power Amplifiers for Modern Mobile Communications: The Load-Modulation Approach

A Tradeoff Design of Broadband Power Amplifier in Doherty Configuration Utilizing a Novel Coupled-Line Coupler

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