Polar Antenna Impedance Detection and Tuning for Efficiency Improvement in a 3G/4G CMOS Power Amplifier

Kousai, Shouhei; Onizuka, Kohei; Yamaguchi, Takashi; Kuriyama, Y.; Nagaoka, Masami

doi:10.1109/jssc.2014.2361322

Cited by 31 publications

(5 citation statements)

References 12 publications

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“…The adaptive antenna impedance matching has two detection schemes: direct complex impedance detection and indirect power detection. Direct complex impedance detections [19], [20] are precise, yet their power-hungry hardware with bulky couplers are hardly affordable in the target ingestible applications. Indirect impedance power detections at the antenna are attractive to on-chip integration because of its low power consumption [16], [21].…”

Section: A Antenna-ic Interfacementioning

confidence: 99%

A Millimeter-Scale Crystal-Less MICS Transceiver for Insertable Smart Pills

Song

Ding

Tiurin

et al. 2020

IEEE Trans. Biomed. Circuits Syst.

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Section: A Antenna-ic Interfacementioning

confidence: 99%

A Millimeter-Scale Crystal-Less MICS Transceiver for Insertable Smart Pills

Song

Ding

Tiurin

et al. 2020

IEEE Trans. Biomed. Circuits Syst.

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“…The PA closed-loop architecture can be extended to realize vector antenna load detection [30]. Figure 2(a) summarizes this scheme, which linearizes PA by the selfcontained loop as well as detects the complex PA load (Z PA ) in a polar fashion.…”

Section: Enhancing Pa Robustness Against Antennamentioning

confidence: 99%

“…Such proportionally increased load ensures that the PA output maintains its maximum RF voltage swing and thus the optimum efficiency due to the load-line relationship. Figure 2(b) shows the simplified schematic of the PA closed-loop architecture with antenna load detection [30]. The phase detector and the comparator are composed of limiter and mixer, where the phase offset can be applied by changing DC offset.…”

Section: Enhancing Pa Robustness Against Antennamentioning

confidence: 99%

A new wave of CMOS power amplifier innovations: Fusing digital and analog techniques with large signal RF operations

Kousai

Onizuka

et al. 2014

Proceedings of the IEEE 2014 Custom Integrated Circuits Conference

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The RF power amplifier (PA) is typically the most power hungry and area consuming block in a wireless transceiver system. A viable RF PA solution should offer competitive power and area efficiency while maintaining high-performance large-signal RF operations. Fully integrated RF PA in CMOS has been an area of active research and development over the past years. Recently, there has been a surge of interest to leverage the mixed-mode, analog and digital, computational and signal processing capability in CMOS to radically enhance RF CMOS PA solutions and offer unique functionalities in parallel. This paper reviews several recently reported circuit design techniques of CMOS PAs. All of these techniques take advantage of computation and integration advantages of CMOS process and can potentially lead to competitive PA solutions compared to traditional III-V HBT PA solutions.Index Terms -CMOS power amplifiers, linearity improvement, impedance tuning, back-off efficiency, digital PA.

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“…Traditional CMOS power amplifier is a double stage differential source-grounded amplifier with inductive load [8], [9], linearization methods have been utilized to enhance distribution and power efficiency [10], [11]. In the past decades, many power amplifiers has been proposed to enhance both power amplifier Power Back-off (PBO) efficiency and linearity.…”

Section: Introductionmentioning

confidence: 99%

Performance of Efficient CMOS Power Amplifier for ISM Band Applications

Saritha*,

Rani,

Anand

2019

IJITEE

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Power amplifiers are one of the most important functional blocks in the Radio Frequency (RF) frontend for reliable wireless communications. The power amplifiers amplify and boost the input signal to needed output power. The signal is amplified to create it sufficiently high for the transmitter to propagate the needed distance to the receiver. Such as power amplifiers are expected to need low-power communication while producing a relatively high output power with more efficiency. The trans-receiver has various blocks such as filters, Voltage Control Oscillator (VCO), Low Noise Amplifier (LNA) and power amplifier. Among these, the most power hungry device is a power amplifier. The efficiency of the power amplifier can be 100%, but practically it is just 55%. So, the scope of improvement in efficiency in a power amplifier will be an interesting and most challenging task. As well defined architecture, including linear functional block synthesis, which is complex in designing CMOS power amplifier for different applications. This article describes the different state-of-the-art design biasing class and advanced RF CMOS power amplifier for Industrial, Scientific, and Medical (ISM) band applications.

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Polar Antenna Impedance Detection and Tuning for Efficiency Improvement in a 3G/4G CMOS Power Amplifier

Cited by 31 publications

References 12 publications

A Millimeter-Scale Crystal-Less MICS Transceiver for Insertable Smart Pills

A Millimeter-Scale Crystal-Less MICS Transceiver for Insertable Smart Pills

A new wave of CMOS power amplifier innovations: Fusing digital and analog techniques with large signal RF operations

Performance of Efficient CMOS Power Amplifier for ISM Band Applications

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