A High Voltage Swing Dual-Band Bandpass $\Delta\Sigma$ Modulator for Mobile Base-Station

This article presents a gallium nitride‐based hybrid current‐mode class‐S (CMCS) power amplifier (PA) in conjunction with a realized band‐pass delta‐sigma modulator for 955 MHz long‐term evolution (LTE) signal. Commercial surface mount Schottky diodes are located behind switching transistors to protect them against negative voltage swing, and performances are analyzed from the perspective of the variations of the output voltage and current waveforms by the intrinsic components of diode. In particular, the chip‐on‐board technique is adopted to enhance the drain efficiency, and the differential output filter and balun composed of lumped LC resonators are integrated at the back of the switching transistor to extract amplified LTE signal. From the measured results with an 8.5 dB peak to average power ratio 3G LTE 10 MHz input signal, the proposed CMCS PA shows maximum average output power of 37.1 and 32.2 dBm, and the resulting drain efficiencies of 35.5 and 38.5% with the drain voltage of 20 and 10 V, respectively. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2118–2121, 2014

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GaN HEMT‐based hybrid current‐mode class‐S power amplifier for 955 MHz LTE signal

Park

Yook

Park

et al. 2014

Micro & Optical Tech Letters

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A 2.4 GHz ISM-band highly digitized receiver based on a variable gain LNA and a subsampled $$\varSigma \varDelta$$ Σ Δ ADC

Haghighitalab

Belfort

Kilic

et al. 2018

Analog Integr Circ Sig Process

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Hybrid Current-Mode Class-S Power Amplifier With GaN Schottky Diode Using Chip-On-Board Technique for 955 MHz LTE Signal

Park

Yook

Park

et al. 2013

IEEE Trans. Microwave Theory Techn.

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A High Voltage Swing Dual-Band Bandpass $\Delta\Sigma$ Modulator for Mobile Base-Station

Cited by 6 publications

References 8 publications

GaN HEMT‐based hybrid current‐mode class‐S power amplifier for 955 MHz LTE signal

GaN HEMT‐based hybrid current‐mode class‐S power amplifier for 955 MHz LTE signal

A 2.4 GHz ISM-band highly digitized receiver based on a variable gain LNA and a subsampled $$\varSigma \varDelta$$ Σ Δ ADC

Hybrid Current-Mode Class-S Power Amplifier With GaN Schottky Diode Using Chip-On-Board Technique for 955 MHz LTE Signal

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