3.0–3.6 GHz wideband, over 46% average efficiency GaN Doherty power amplifier with frequency dependency compensating circuits

Komatsuzaki, Yuji; Nakatani, Keigo; Shinjo, Shintaro; Miwa, Shuichiro; Ma, Rui; Yamanaka, Koji

doi:10.1109/pawr.2017.7875563

Cited by 19 publications

(11 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In Fig. 2, the photo of a wideband GaN Doherty power amplifier with a frequency dependency compensating circuit (FDCC) is shown [5]. As mentioned before, the conventional Doherty amplifiers are not good at wideband operation, because a quarter wave-length transmission line connected to the output of main amplifier limits the operational bandwidth.…”

Section: Hpa Technology Trend In Sub6 Ghzmentioning

confidence: 99%

“…Moreover, an operation bandwidth for the Doherty amplifiers becomes narrower as the output power ratio becomes larger. To address these problems, some new types of Doherty amplifiers have been proposed to date [5][6][7][8][9][10][11][12][13]. For efficiency enhancement at arbitrary back-off levels, GaN envelope tracking (ET) amplifiers have already been proposed [14,15].…”

Section: Hpa Technology Trend In Sub6 Ghzmentioning

confidence: 99%

“…Measured frequency dependences of drain efficiency (DE) and output power with ACLR using a digital predistortion (DPD) are shown in Fig. 3 [5], where DE and output power at ACLR < -50 dBc are plotted. Thanks to the FDCC, more than 34.3 dBm of output power and more than 45 % of DE are successfully obtained over a 400 MHz operational bandwidth.…”

Section: Hpa Technology Trend In Sub6 Ghzmentioning

confidence: 99%

See 2 more Smart Citations

Overview and Prospects of High Power Amplifier Technology Trend for 5G and beyond 5G Base Stations

Yamanaka

Shinjo

Komatsuzaki

et al. 2021

IEICE Trans. Electron.

Self Cite

View full text Add to dashboard Cite

senior member, Shintaro SHINJO † , senior member, Yuji KOMATSUZAKI † , member, Shuichi SAKATA † , member, Keigo NAKATANI † , member, Yutaro YAMAGUCHI † , member SUMMARY High power amplifier technologies for base transceiver stations (BTSs) for the 5th generation (5G) mobile communication systems and so-called beyond 5G (B5G) systems are reviewed. For sub-6, which is categorized into frequency range 1 (FR1) in 5G, wideband Doherty amplifiers are introduced, and a multi-band load modulation amplifier, an envelope tracking amplifier, and a digital power amplifier for B5G are explained. For millimeter wave 5G, which is categorized into frequency range 2 (FR2), GaAs and GaN MMICs operating at around 28GHz are introduced. Finally, future prospect for THz GaN devices is described.

show abstract

Section: Hpa Technology Trend In Sub6 Ghzmentioning

confidence: 99%

Section: Hpa Technology Trend In Sub6 Ghzmentioning

confidence: 99%

Section: Hpa Technology Trend In Sub6 Ghzmentioning

confidence: 99%

See 1 more Smart Citation

Overview and Prospects of High Power Amplifier Technology Trend for 5G and beyond 5G Base Stations

Yamanaka

Shinjo

Komatsuzaki

et al. 2021

IEICE Trans. Electron.

Self Cite

View full text Add to dashboard Cite

show abstract

“…To enhance the bandwidth of Doherty PAs, distributedelement frequency compensation has been used to widen the frequency range to 3.0-3.6 (18%) GHz [11]. Further bandwidth enhancement can be achieved by using cascaded combiners/dividers or hybrid couplers at the input and the output of the amplifiers [12], or wideband commercially available hybrid couplers [6].…”

Section: Introductionmentioning

confidence: 99%

A Compact Octave Tunable Switched-Power-Combining PA

Khater

Abdelfattah

et al. 2021

IEEE Access

View full text Add to dashboard Cite

This paper presents a switched-power-combining RF power amplifier (PA) architecture, using evanescentmode resonators as input splitters and output combiners. The input resonator also provides proper input matching to the transistor, eliminating the need for an input matching network, which reduces the overall size of the PA. The external couplings into the resonators are switchable to allow for activating one, two, or all three sub-PAs, depending on the power requirement. This results in a higher Output Back-off (OBO) efficiency, compared to a single PA. The presented concepts for the proposed architecture are supported by theoretical analysis and experimental validation. The implemented PA is based on Class-E sub-PAs, operates in the 1.2-2.4 GHz range, provides 36-40 dBm output power, and occupies an area of 41×82 mm 2 . Compared to the state-of-the-art amplifiers operating at this frequency range, this resembles an average of 80% reduction in size.

show abstract

“…A 3.6‐3.8 GHz band is one of the 5G frequency candidates. Doherty power amplifiers above 3 GHz have been developed to have wideband with hybrid type and to be compact size by using GaN core power amplifier MMIC …”

Section: Introductionmentioning

confidence: 99%

A compact Doherty power amplifier for massive multi‐input multi‐output applications

Noh

Sin

2018

Micro & Optical Tech Letters

View full text Add to dashboard Cite

A Doherty power amplifier composed of GaAs IPDs (Lange coupler and Doherty combiner) and GaN MMICs (carrier amplifier and peaking amplifier) is presented for 5G massive multi‐input multi‐output (MIMO). No input phase compensation circuit and no output offset lines were used for a compact design and the assembled Doherty power amplifier is as small as 6.6 mm × 3.6 mm with a saturation output power of 46 dBm. The asymmetric Doherty power amplifier exhibits a gain greater than 27.8 dB, PAE greater than 39.8% at average output power of 38 dBm, and ACLR less than −27.7 dBc using a 20 MHz LTE signal with 7.5 dB PAR across 3.6‐3.8 GHz.

show abstract

3.0–3.6 GHz wideband, over 46% average efficiency GaN Doherty power amplifier with frequency dependency compensating circuits

Cited by 19 publications

References 3 publications

Overview and Prospects of High Power Amplifier Technology Trend for 5G and beyond 5G Base Stations

Overview and Prospects of High Power Amplifier Technology Trend for 5G and beyond 5G Base Stations

A Compact Octave Tunable Switched-Power-Combining PA

A compact Doherty power amplifier for massive multi‐input multi‐output applications

Contact Info

Product

Resources

About