A wideband 700W push-pull Doherty amplifier

He, Jingchu; Qureshi, Jawad; Sneijers, W.; Calvillo-Cortes, David A.; deVreede, L. C. N.

doi:10.1109/mwsym.2015.7166772

Cited by 11 publications

(6 citation statements)

References 5 publications

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“…Compared to other works, as shown in Table I, the variation in average power and efficiency is very small for this 60% fractional BW, which is one of the strongest aspect of the proposed low-pass QLI class-E DPA operation mode. Namely, in [27] and [29]- [31], the variation in average efficiency are ±9%, ±7%, ±9%, and ±8.5%, respectively. The gain at the high frequencies of the band could be improved by further optimizing the input matching network of the GaN devices at these frequencies.…”

Section: Measurement Results Of Wideband Dpamentioning

confidence: 94%

“…9(a)], the fundamental and harmonic impedances offered to the main device in power backoff versus frequency show larger variations, which prevent wideband operation with a single-ended design approach. Note that push-pull wideband class-B DPA designs [27] can overcome these limitations but only at the cost of a more complicated assembly and balun which tends to add more losses.…”

Section: Dual Input Dpa Using Package Integrated Low-pass Qli Clamentioning

confidence: 99%

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High Efficiency and Wide Bandwidth Quasi-Load Insensitive Class-E Operation Utilizing Package Integration

Qureshi

Acar

Pires³

et al. 2018

IEEE Trans. Microwave Theory Techn.

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Packaged integrated low-pass quasi-load insensitive (QLI) class-E matching is proposed for the realization of energyefficient wideband Doherty and outphasing transmitters. In view of this, a dedicated QLI class-E harmonic matching technique, suitable for in-package integration has been developed, optimized, and evaluated. As proof of concept, very compact, as well as easy to assemble, dual-input load-modulating transmitters have been realized. In this paper, we focus on a QLI class-E matched wideband Doherty that provides 71% peak efficiency (±3%) at 48-dBm saturated output power and 49% (±7%) efficiency at 6-dB power backoff, over a 1200-MHz frequency span (1.4-2.6 GHz), yielding 60% fractional bandwidth (BW). When tested with single-carrier long-term evolution (LTE) signals, having a 7-dB peak-to-average ratio, average efficiency remains close to 49% (±3%) for the entire 60% fractional BW. The realized demonstrator shows excellent linearizability with adjacent channel power ratio and normalized mean square error levels below −50 dBc and −36 dB, respectively, even when operated in simultaneous dual-band LTE operation.Index Terms-Doherty, dual input, harmonic matching, high efficiency, package integration, quasi-load insensitive (QLI) class-E, wideband.

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Section: Measurement Results Of Wideband Dpamentioning

confidence: 94%

Section: Dual Input Dpa Using Package Integrated Low-pass Qli Clamentioning

confidence: 99%

High Efficiency and Wide Bandwidth Quasi-Load Insensitive Class-E Operation Utilizing Package Integration

Qureshi

Acar

Pires³

et al. 2018

IEEE Trans. Microwave Theory Techn.

View full text Add to dashboard Cite

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“…IGH power, wide bandwidth, low-loss and compact baluns with an average power handling capability of more than 500 W are used in push-pull amplifiers for wireless base stations, broadcast transmitters, air traffic control systems, and multi-functional radar systems [1]- [4]. Marchand compensated transmission line concepts [5]- [12] are widely used to design wide bandwidth baluns on printed circuit boards.…”

Section: Introductionmentioning

confidence: 99%

“…The power handling capability also depends on the glass transition temperature of the substrate material and coaxial dielectric [28], [29]. Ferriteless baluns [3], [4] with power handling capabilities from 500 W to 700 W have been reported but have a narrow operating bandwidth. The non-ferrite high-power balun in [4] uses conventional quarter wavelength coaxial cables on ceramic substrates to achieve a bandwidth ratio of 2:1 around a center frequency of 725 MHz.…”

Section: Introductionmentioning

confidence: 99%

“…Ferriteless baluns [3], [4] with power handling capabilities from 500 W to 700 W have been reported but have a narrow operating bandwidth. The non-ferrite high-power balun in [4] uses conventional quarter wavelength coaxial cables on ceramic substrates to achieve a bandwidth ratio of 2:1 around a center frequency of 725 MHz. To date, wide bandwidth (above 5:1 bandwidth ratio) and high power handling baluns (more than 500 W) have not been reported.…”

Section: Introductionmentioning

confidence: 99%

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Design of 600-W Low-Loss Ultra-Wideband Ferriteless Balun

Pham

Leoni

2018

IEEE Trans. Microwave Theory Techn.

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Abstract-We present the development of a low loss, high power, and ferriteless balun that operates over 0.1-1.6 GHz bandwidth. The proposed balun employs a novel compensated circuit, a single quarter-wave semi-rigid coaxial cable and an on-board inductor on a thermoset ceramic board to achieve high power and ultra-wide bandwidth performance. The experimental results show that the balun achieves a measured average insertion loss of less than 0.5 dB and return loss of better than 10 dB from 100 MHz to more than 1.6 GHz. Within the measured bandwidth, the amplitude and phase imbalances are within ±1 dB and ±5°, respectively. Multiphysics analysis and high power measurements demonstrate that the balun can handle more than 600 W and above at 1.6 GHz. To the best of our knowledge, the reported balun has the highest measured power handling capability per the largest 16:1 bandwidth ratio to date.Index Terms-Transmission line balun, wide bandwidth balun, defected ground structure, semi-rigid coaxial cable, multiphysics analysis, power handling capability.

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Feasibility study of the feed‐forward carrier recovery technique for E‐band integrated receivers

Dyskin

Kallfass

2019

IET Circuits, Devices & Systems

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A feasibility study of a carrier recovery technique based on a feed-forward controlled leakage transmission carrier is presented. The study proposes a receiver topology and verifies its feasibility by means of the system-level simulations. The results of the study indicate that the proposed technique is theoretically modulation-independent and can be used with each modulation format. To demonstrate a practical feasibility, a BPSK receiver topology is proposed and based on it a demonstrator chip is implemented in a SiGe 0.13 μm heterojunction bipolar transistor technology. To reduce the complexity of the integrated receiver and to sustain low risks at the first production run, the receiver was implemented as all-resistive. The carrier recovery circuit on the chip comprises a static frequency divider and a K a-band phase-locked loop with quadrature outputs. A directconversion sub-harmonic mixer plays the role of a E-band demodulator. The proposed technique can be used in various high baud rate communication applications, saving on the computing power of the digital process.

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A wideband 700W push-pull Doherty amplifier

Cited by 11 publications

References 5 publications

High Efficiency and Wide Bandwidth Quasi-Load Insensitive Class-E Operation Utilizing Package Integration

High Efficiency and Wide Bandwidth Quasi-Load Insensitive Class-E Operation Utilizing Package Integration

Design of 600-W Low-Loss Ultra-Wideband Ferriteless Balun

Feasibility study of the feed‐forward carrier recovery technique for E‐band integrated receivers

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