A CDMA InGaP/GaAs-HBT MMIC Power Amplifier Module Operating With a Low Reference Voltage of 2.4 V

Yamamoto, Kazuya; Moriwaki, T.; Otsuka, Hiroshi; Ogawa, Norio; Maemura, K.; Shimura, Takaaki

doi:10.1109/jssc.2007.897120

Cited by 16 publications

(2 citation statements)

References 15 publications

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“…For example, in 3G handsets, a PA operates only in a single frequency band, and its front-end loss is typically as low as 1 dB [3]- [6]. In contrast, in 4G handsets, some band select switches are placed right after a PA while several frequency bands are covered with one PA. As depicted in the red dotted box of Fig.…”

Section: Introductionmentioning

confidence: 99%

Recent Progress in Envelope Tracking Power Amplifiers for Mobile Handset Systems

Mukai

Okabe

Tanaka

2021

IEICE Trans. Electron.

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The Fifth-Generation new radio (5G NR) services that started in 2020 in Japan use a higher peak-to-average power ratio (PAPR) of a modulated signal with a maximum bandwidth of up to 100MHz and support multi-input/multi-output (MIMO) systems even in mobile handsets, compared to the Third-Generation (3G) and/or Fourth-Generation (4G) handsets. The 5G NR requires wideband operation for power amplifiers (PAs) used in handsets under a high PAPR signal condition. The 5G NR also requires a number of operating bands for the handsets. These requirements often cause significand degradation of the PA efficiency, consequently. The degradation is due to wideband and/or high PAPR operation as well as additional front-end loss between a PA and an antenna. Thus, the use of an efficiency enhancement technique is indispensable to 5G NR handset PAs. An envelope tracking (ET) is one of the most effective ways to improve the PA efficiency in the handsets. This paper gives recent progress in ET power amplifiers (ETPAs) followed by a brief introduction of ET techniques. The introduction describes a basic operation for an ET modulator that is a key component in the ET techniques and then gives a description of some kinds of ET modulators. In addition, as an example of a 5G NR ETPA, the latest experimental results for a 5G ETPA prototype are demonstrated while comparing overall efficiency of the ET modulator and PA in the ET mode with that in the average power tracking (APT) mode.

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Section: Introductionmentioning

confidence: 99%

Recent Progress in Envelope Tracking Power Amplifiers for Mobile Handset Systems

Mukai

Okabe

Tanaka

2021

IEICE Trans. Electron.

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“…Meanwhile, a pre-distortion diode for canceling the AM/AM and AM/PM distortions in PA operation working at 1.9 GHz was also proposed [2]. For GaAs-based HBT PAs used in wireless communication frequency bands, the diode lineariser has also been successfully adapted [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Design of high‐efficiency SiGe hetrojunction bipolar transistor linear power amplifier with new adaptive bias configuration

Huang

Lin

2013

IET Microwaves, Antennas & Propagation

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This study shows a 2.4 GHz linear power amplifier (PA) design with a new adaptive bias configuration using TSMC 0.35 μm SiGe hetrojunction bipolar transistor (HBT) technology, for wireless communication applications such as WLAN. The proposed bias configuration adequately compromises the consumed current and the output power to avoid dramatic current increases in the high‐input power condition, while the output power capability is also maintained to achieve optimal efficiency through a proper size selection for the bias HBT. The final designed PA displays P1 dB of 23.76 dBm and 29.76% power‐added‐efficiency (PAE) with a 33.1 dBm output‐intercept‐point in the third order (OIP3). The saturated output power is 27.54 dBm with 39.12% in PAE, while the chip size is 0.91 × 0.83 mm2.

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Multi-mode Power Amplifiers for Wireless Handset Applications

Deng

Larson

2009

Series on Integrated Circuits and Systems

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A CDMA InGaP/GaAs-HBT MMIC Power Amplifier Module Operating With a Low Reference Voltage of 2.4 V

Cited by 16 publications

References 15 publications

Recent Progress in Envelope Tracking Power Amplifiers for Mobile Handset Systems

Recent Progress in Envelope Tracking Power Amplifiers for Mobile Handset Systems

Design of high‐efficiency SiGe hetrojunction bipolar transistor linear power amplifier with new adaptive bias configuration

Multi-mode Power Amplifiers for Wireless Handset Applications

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