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Gotowe bibliografie tematyczne / Amplifiers, Radio frequency / Artykuły w czasopismach

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Artykuły w czasopismach na temat „Amplifiers, Radio frequency”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 27 stycznia 2023

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1

Mück, Michael, and Robert McDermott. "Radio-frequency amplifiers based on dc SQUIDs." Superconductor Science and Technology 23, no. 9 (July 19, 2010): 093001. http://dx.doi.org/10.1088/0953-2048/23/9/093001.

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Sajedin, Maryam, I. T. E. Elfergani, Jonathan Rodriguez, Raed Abd-Alhameed, and Monica Fernandez Barciela. "A Survey on RF and Microwave Doherty Power Amplifier for Mobile Handset Applications." Electronics 8, no. 6 (June 25, 2019): 717. http://dx.doi.org/10.3390/electronics8060717.

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This survey addresses the cutting-edge load modulation microwave and radio frequency power amplifiers for next-generation wireless communication standards. The basic operational principle of the Doherty amplifier and its defective behavior that has been originated by transistor characteristics will be presented. Moreover, advance design architectures for enhancing the Doherty power amplifier’s performance in terms of higher efficiency and wider bandwidth characteristics, as well as the compact design techniques of Doherty amplifier that meets the requirements of legacy 5G handset applications,

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3

Togawa, Kazuaki, Hirokazu Maesaka, Reichiro Kobana, and Hitoshi Tanaka. "Frequency-segmented power amplification using multi-band radio frequency amplifiers to produce a high-voltage pulse." Review of Scientific Instruments 93, no. 7 (July 1, 2022): 073304. http://dx.doi.org/10.1063/5.0093915.

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A method of frequency-segmented power amplification using multiband radio frequency (RF) amplifiers was proposed to generate stable and arbitrary high-voltage pulses. The concept behind this method is that an arbitrary pulse with a specified duration and sharp edges can be reconstructed using only several frequencies, and most of the power is concentrated on the fundamental frequency. The high-voltage pulse can, therefore, be obtained by amplifying each segmented frequency and then combining it with the RF power combiners. To correct the frequency-dependent group delays and gain of the amplifi

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4

El Misilmani, H. M., M. Y. Abou-Shahine, Y. Nasser, and K. Y. Kabalan. "Recent Advances on Radio-Frequency Design in Cognitive Radio." International Journal of Antennas and Propagation 2016 (2016): 1–16. http://dx.doi.org/10.1155/2016/9878475.

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With the growth of mobile data applications, the spectrum allocation is becoming very scarce. To ease congestion and boost speeds, cognitive radio (CR) is currently seen as a major solution and expected to be the key player in the new wireless technologies. In this paper, we will start by introducing the cognitive radio systems, followed by exploring the challenges in designing RF engine, along with an investigation of its antennas, amplifiers, oscillators, and the components that are expected to operate over a wide range of frequencies.

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5

Wiegner, Dirk, Gerhard Luz, Patrick Jüschke, Robin Machinal, Thomas Merk, Ulrich Seyfried, Wolfgang Templ, Andreas Pascht, Rüdiger Quay, and Friedbert Van Raay. "AlGaN/GaN-based power amplifiers for mobile radio applications: a review from the system supplier's perspective." International Journal of Microwave and Wireless Technologies 2, no. 1 (February 2010): 95–104. http://dx.doi.org/10.1017/s175907871000022x.

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This paper gives a summarized overview on the progress and achievements on AlGaN/GaN high electron mobility transistors (HEMT)-based power amplifiers (PAs) for mobile radio applications which have been achieved within two national funded German projects during a period of six years. Starting with a first 34 dBm (2.5 W, peak) amplifier in 2003 the impressive progress toward highly efficient S-band mobile radio PAs with up to >50 dBm (100 W) peak output power is described by means of some selected single- and multiband amplifier demonstrators. This progress has been mainly enabled by clear pr

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6

Fiori, F., and P. S. Crovetti. "Nonlinear effects of radio-frequency interference in operational amplifiers." IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications 49, no. 3 (March 2002): 367–72. http://dx.doi.org/10.1109/81.989173.

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7

Magnuski, Mirosław, Maciej Surma, and Dariusz Wójcik. "Broadband Input Block of Radio Receiver for Software-Defined Radio Devices." International Journal of Electronics and Telecommunications 60, no. 3 (October 28, 2014): 233–38. http://dx.doi.org/10.2478/eletel-2014-0029.

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Abstract In the paper a cost-effective input block of the SDR receiver for 0.9 — 2.4 GHz frequency band built of capacitive-tuned selective amplifier and broadband Vivaldi antenna is presented. The applied selective amplifier consists of three identical sections of tunable filters and two stages of monolithic broadband amplifiers. The single filter section proposed by the authors, due to its ability to absorb parasitic inductances of varicap diodes, simplifies usage of encapsulated varicap diodes in design of tunable in broad band selective filters dedicated to input stages of the receivers. M

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8

Watkins, Gavin. "Inductor‐less envelope modulated radio frequency power amplifier using stacked amplifiers and envelope shaping." IET Microwaves, Antennas & Propagation 7, no. 15 (December 2013): 1215–20. http://dx.doi.org/10.1049/iet-map.2013.0328.

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9

Mabrok, Mussa, Zahriladha Zakaria, and Nasrullah Saifullah. "Design of Wide-band Power Amplifier based on Power Combiner Technique with Low Intermodulation Distortion." International Journal of Electrical and Computer Engineering (IJECE) 8, no. 5 (October 1, 2018): 3504. http://dx.doi.org/10.11591/ijece.v8i5.pp3504-3511.

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RF power amplifiers are one of challenging blocks in designing radio frequency transceivers, this is due to non-linearity behavior of power amplifiers that leads to inter-modulation distortion. This paper presents the design of wide-band power amplifier which combined with parallel coupled line band pass filter at the input and output of power amplifier to allow the only required frequency band to pass through the power amplifier. Class-A topology and ATF-511P8 transistor are used in this design. Advanced Design System software used as a simulation tool to simulate the designed wide-band power

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10

Silveira, Daniel D., Thiago V. N. Coelho, and Alexandre Bessa dos Santos. "Evolution of Black-Box Models Based on Volterra Series." Journal of Applied Mathematics 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/638978.

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This paper presents a historical review of the many behavioral models actually used to model radio frequency power amplifiers and a new classification of these behavioral models. It also discusses the evolution of these models, from a single polynomial to multirate Volterra models, presenting equations and estimation methods. New trends in RF power amplifier behavioral modeling are suggested.

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11

Zhou, Shaohua, Cheng Yang, and Jian Wang. "Modeling of Key Specifications for RF Amplifiers Using the Extreme Learning Machine." Micromachines 13, no. 5 (April 28, 2022): 693. http://dx.doi.org/10.3390/mi13050693.

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The amplifier is a key component of the radio frequency (RF) front-end, and its specifications directly determine the performance of the system in which it is located. Unfortunately, amplifiers’ specifications degrade with temperature and even lead to system failure. To study how the system failure is affected by the amplifier specification degradation, it is necessary to couple the amplifier specification degradation into the system optimization design. Furthermore, to couple the amplifier specification degradation into the optimal design of the system, it is necessary to model the characteri

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12

Muhamed, Mais, Fariz Abboud, and Mohamad Alhariri. "Broadband Performance of a 6W Pushpull Power Amplifier on the VHF-UHF Band." International Journal of Electronics, Communications, and Measurement Engineering 11, no. 1 (January 2022): 1–8. http://dx.doi.org/10.4018/ijecme.294892.

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In this paper, a broadband 100-700 MHz power amplifier was designed. The results of simulation are compared with the measurements,The shunt feedback of power amplifier module provides the linear and broadband frequency amplification. The push-pull topology with ferrite balun provides enhanced efficiency and high power generation along In this work a commercially available LDMOS transistor (D2003UK) is used, The amplifier can deliver 6W to a 50 ohm load and has 14dB gain.Broadband high power amplifiers are considered as key components in next generation software defined radio communication syst

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13

Jebali, C., N. Boulejfen, M. Rawat, A. Gharsallah, and F. M. Ghannouchi. "Modeling of wideband radio frequency power amplifiers using Zernike polynomials." International Journal of RF and Microwave Computer-Aided Engineering 22, no. 3 (February 23, 2012): 289–96. http://dx.doi.org/10.1002/mmce.20575.

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14

Wang, Z., Q. Y. Tan, Y. R. Lu, S. L. Gao, Y. Xia, S. Liu, M. Y. Han, and J. Zhao. "Design and cold measurements of a coupled RFQ-SFRFQ cavity." Journal of Instrumentation 17, no. 02 (February 1, 2022): T02008. http://dx.doi.org/10.1088/1748-0221/17/02/t02008.

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Abstract Based on the previous research on 26 MHz coupled RFQ-SFRFQ (Radio Frequency Quadrupole-Separated-function Radio Frequency Quadrupole) cavity, we propose a higher frequency coupled RFQ-SFRFQ structure to accelerate proton beam from 35 keV to 2.5 MeV in continuous wave (CW) mode. RFQ and SFRFQ are placed in a single cavity, which greatly reduces the size of the accelerator. Instead of two RF amplifiers, only one RF amplifier is needed with this structure, as a result, this structure becomes more compact. The beam dynamic design and electromagnetic simulation have been accomplished. A 10

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15

Hasegawa, Naoki, and Naoki Shinohara. "Sidelobe reduction with a GaN active array antenna." Wireless Power Transfer 4, no. 2 (September 2017): 113–19. http://dx.doi.org/10.1017/wpt.2017.8.

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This work proposes a tunable sidelobe reduction method based on a GaN active-antenna technique, in which the output radio frequency power is controlled by the DC drain voltage of the amplifiers. In this study, a 1 × 4 array of active antenna with GaN amplifiers is designed and fabricated. GaN amplifiers capable of up to 10 W-class power output are fabricated and arranged for a four-way active-array antenna. The fabricated single-stage GaN amplifier offers a maximum power-added efficiency of 59.6% and a maximum output power of 39.3 dBm. The maximum output power is decreased to 36.5 dBm upon dec

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16

Kim, Bruce C., Sai Evana, and Rahim Kasim. "Packaging of MEMS for Integrated RF Circuit Verifications." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2011, DPC (January 1, 2011): 000926–51. http://dx.doi.org/10.4071/2011dpc-tp24.

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This paper provides development of MEMS switches and packaging of MEMS to test radio frequency circuits used in wireless products such as cell phones and network routers. We discuss fabrication of MEMS using low voltage magnetic materials and their configurations to achieve the optimum switch to test RF low noise amplifiers. We have accomplished a very unique methodology to test low noise amplifiers using built-in sellf-test technique and our MEMS switches are proposed to achieve the verification of low noise amplifiers. Furthermore, we have used MEMS switches that we developed to perform self

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17

Tomov, M. B., P. G. Kogias, S. M. Sadinov, and M. N. Malamatoudis. "Comparative criteria for objective evaluation of the efficiency of RF power amplifiers." Journal of Physics: Conference Series 2339, no. 1 (September 1, 2022): 012031. http://dx.doi.org/10.1088/1742-6596/2339/1/012031.

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Abstract Objective comparison of radio frequency amplifiers, which are infinitely diverse in their parameters and purpose is a difficult engineering task. For its successful solution it is necessary to define objective criteria that allow to quantify qualitatively and quantitatively the scheme and mode of operation of the amplifier, without this assessment depending on the absolute values of current, voltage, power and parameters of active and passive elements in the electronic circuit.

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18

Agarwal, Nitin, Manish Gupta, and Manish Kumar. "AN EXTENSIVE REVIEW ON: LOW NOISE AMPLIFIER FOR MILLIMETER AND RADIO FREQUENCY WAVES." Jurnal Teknologi 84, no. 1 (November 27, 2021): 231–39. http://dx.doi.org/10.11113/jurnalteknologi.v84.16524.

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In today’s world, radio receiver system is a prevailing wireless technology in that the major part is Low Noise Amplifier (LNA) which widely used to improve weak signals in many applications with millimeter and radio frequency waves such as optical communication, multimode transceivers and measurement instrumentations. The real drawbacks of LNA is that it fails to maintain specific properties in critical conditions like as minimum power consumption, provide low noise figure, input matching and linearity. Additionally, promoted by various application demands, design methods and control methods

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19

Liu, Leisong, Yuantian Lu, Xin Zhuang, Qunying Zhang, and Guangyou Fang. "Noise Analysis in Pre-Amplifier Circuits Associated to Highly Sensitive Optically-Pumped Magnetometers for Geomagnetic Applications." Applied Sciences 10, no. 20 (October 15, 2020): 7172. http://dx.doi.org/10.3390/app10207172.

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This paper analyzes the noise sources in photoelectric detection circuits with several low-noise operational amplifiers cores. The fabricated circuits are low-noise pre-amplifiers that are used for optically pumped magnetometers. In the proposed circuits, the noise levels of equivalent output voltage are calculated, and the results are in accordance with measurements. With a cooperation of several operational amplifiers, we select LT1028 from linear technologies as the core for our detection circuit, which has an output signal-to-noise ratio of more than 2 × 105 up to the frequency of 100 kHz.

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20

Gurov, E. V., S. U. Uvaysov, V. V. Chernoverskaya, and R. M. Uvaysov. "Very high frequency radio receiver preselector design." Russian Technological Journal 9, no. 6 (December 2, 2021): 37–45. http://dx.doi.org/10.32362/2500-316x-2021-9-6-37-45.

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Objectives. The quality of a radio receiver preselector largely determines its main characteristics, including sensitivity. A preselector usually consists of linear elements: inductors, capacitors, low noise amplifiers, and switches. At high frequencies, the components cannot be considered as ideal ones, since active and reactive parasitic parameters significantly affect the frequency response of the components and, as a consequence, the network. Therefore, simulation of the networks requires more sophisticated component models, which take into account parasitic parameters. However, if refined

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21

del Pino, J., Sunil L. Khemchandani, D. Galante-Sempere, and C. Luján-Martínez. "A Compact Size Wideband RF-VGA Based on Second Generation Controlled Current Conveyors." Electronics 9, no. 10 (September 30, 2020): 1600. http://dx.doi.org/10.3390/electronics9101600.

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This paper presents a methodology to design a wideband radio frequency variable gain amplifier (RF-VGA) in a low-cost SiGe BiCMOS 0.35 μm process. The circuit uses two Class A amplifiers based on second-generation controlled current conveyors (CCCII). The main feature of this circuit is the wideband input match along with a reduced NF (5.5–9.6 dB) and, to the authors’ knowledge, the lowest die footprint reported (62 × 44 μm2 area). The implementation of the RF-VGA based on CCCII allows a wideband input match without the need of passive elements. Due to the nature of the circuit, when the gain

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22

Baytekin, B., and R. G. Meyer. "Analysis and simulation of spectral regrowth in radio frequency power amplifiers." IEEE Journal of Solid-State Circuits 40, no. 2 (February 2005): 370–81. http://dx.doi.org/10.1109/jssc.2004.840968.

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23

Rönnow, D., and M. Isaksson. "Digital predistortion of radio frequency power amplifiers using Kautz-Volterra model." Electronics Letters 42, no. 13 (2006): 780. http://dx.doi.org/10.1049/el:20060460.

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24

Hassan Abdelhafiz, Abubaker, Oualid Hammi, Azzedine Zerguine, and Fadhel M. Ghannouchi. "Lattice-based memory polynomial predistorter for wideband radio frequency power amplifiers." IET Communications 8, no. 17 (November 27, 2014): 3122–27. http://dx.doi.org/10.1049/iet-com.2014.0129.

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25

Sharma, Deepak Kumar, Akhilesh Jain, Kriti Pathak, and Mahendra Lad. "Compact dual-channel radio frequency power sensor for solid state amplifiers." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 944 (November 2019): 162559. http://dx.doi.org/10.1016/j.nima.2019.162559.

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26

Bachir, S., and C. Duvanaud. "Linearization of radio frequency amplifiers using nonlinear Internal Model Control method." AEU - International Journal of Electronics and Communications 65, no. 6 (June 2011): 495–501. http://dx.doi.org/10.1016/j.aeue.2010.07.004.

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Abuelma'atti, M. T. "Radio frequency interference by demodulation mechanisms present in bipolar operational amplifiers." IEEE Transactions on Electromagnetic Compatibility 37, no. 2 (May 1995): 306–10. http://dx.doi.org/10.1109/15.385901.

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28

Hamadou, Aissatou. "Implementation of direct current to direct current converter exploiting power amplifier." Annals of Electrical and Electronic Engineering 3, no. 3 (March 2020): 1–7. http://dx.doi.org/10.21833/aeee.2020.02.002.

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In the last years, RF power amplifiers are taking advantage of the switched dc-dc converters to use them in several architectures that may improve the efficiency of the amplifier, keeping good linearity. In this study a DC-DC power converter design suitable for high-frequency applications by using a class E power amplifier (Inverter), instead of using small battery values choosing Radio Frequency (RF) values and getting high efficiency of output voltage and a maximum of current and voltage values between 0-9 mW of power input in rectifier, the class E power amplifier designed by using GaN HEMT

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Hamadou, Aissatou. "Implementation of direct current to direct current converter exploiting power amplifier." Annals of Electrical and Electronic Engineering 3, no. 3 (March 2020): 1–7. http://dx.doi.org/10.21833/aeee.2020.03.001.

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In the last years, RF power amplifiers are taking advantage of the switched dc-dc converters to use them in several architectures that may improve the efficiency of the amplifier, keeping good linearity. In this study a DC-DC power converter design suitable for high-frequency applications by using a class E power amplifier (Inverter), instead of using small battery values choosing Radio Frequency (RF) values and getting high efficiency of output voltage and a maximum of current and voltage values between 0-9 mW of power input in rectifier, the class E power amplifier designed by using GaN HEMT

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30

Tillman, R. H., S. W. Ellingson, and J. Brendler. "Practical Limits in the Sensitivity-Linearity Trade-off for Radio Telescope Front Ends in the HF and VHF-low Bands." Journal of Astronomical Instrumentation 05, no. 02 (May 31, 2016): 1650004. http://dx.doi.org/10.1142/s2251171716500045.

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Radio telescope front ends must have simultaneously low noise and sufficiently-high linearity to accommodate interfering signals. Typically these are opposing design goals. For modern radio telescopes operating in the HF (3–30[Formula: see text]MHz) and VHF-low (30–88[Formula: see text]MHz) bands, the problem is more nuanced in that front end noise temperature may be a relatively small component of the system temperature, and increased linearity may be required due to the particular interference problems associated with this spectrum. In this paper, we present an analysis of the sensitivity-li

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31

Volkov, A. A., and M. S. Morozov. "Phase Preselector Intended to Suppress Image Frequency in the Radio Receiver." World of Transport and Transportation 20, no. 1 (December 17, 2022): 30–35. http://dx.doi.org/10.30932/1992-3252-2022-20-1-4.

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Until now, to suppress the image channel, radio receivers use a frequency preselector consisting of oscillatory circuits of the input device and a radio frequency amplifier. But the frequency preselector does not suppress strongly enough the image frequency. Therefore, two frequency conversions are often used in railway radio communication systems. For example, for station radio communications at frequencies f = 151‒156 MHz, two frequency converters with fpr1 = 24 MHz and fpr2 =1,596 MHz are used, which greatly complicates the design of the receiver.The article proposes to use a phase preselec

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32

Yang, Hsin Chia, and Mu Chun Wang. "Extensive 6.0-18.0 GHz Frequency Low Noise Amplifiers Integrated to Form LC-Feedback Oscillators." Advanced Materials Research 225-226 (April 2011): 1075–79. http://dx.doi.org/10.4028/www.scientific.net/amr.225-226.1075.

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Low Voltage supplied radio-frequency (RF) CMOS devices by TSMC 0.18 micron process are used for the RF circuit designs of low noise amplifiers. Three components, low noise amplifiers (LNA), Class-E power amplifiers (PA), and LC oscillator simultaneously working at 6.0 to 18.0 GHz, are explored. The scenario combining two matched amplifiers, LNA and PA, and then amplifying the coupled signals from the oscillators is proven to be working. LNA usually runs prior to PA to suppress the noises, and thus the whole set functions like an integrated LNA, whose forward gain may be promoted as high as at

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Ayllon, Natanael, Juan-Mari Collantes, Aitziber Anakabe, Geoffroy Soubercaze-Pun, Stephane Forestier, and Dominique Langrez. "Joint RF and large-signal stability optimization of MMIC power combining amplifiers." International Journal of Microwave and Wireless Technologies 5, no. 6 (August 8, 2013): 683–88. http://dx.doi.org/10.1017/s1759078713000767.

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In this paper, authors report on an enhanced approach for the design of monolithic microwave integrated circuit (MMIC) power combining amplifiers. Commonly used techniques for the stabilization of such circuits are empirical and too conservative. This leads very often to a non-desired degradation of the radio frequency (RF) performances that are inherent to the physical properties of such stabilization networks at the fundamental frequency of operation. The methodology proposed here is based on the use of large-signal optimization processes that combine RF and stability analyses from the early

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Ronnow, Daniel, David Wisell, and Magnus Isaksson. "Three-Tone Characterization of Nonlinear Memory Effects in Radio-Frequency Power Amplifiers." IEEE Transactions on Instrumentation and Measurement 56, no. 6 (December 2007): 2646–57. http://dx.doi.org/10.1109/tim.2007.907958.

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Montesinos, Ronald, Corinne Berland, Mazen Abi Hussein, Olivier Venard, and Philippe Descamps. "Analysis of RF power amplifiers in LINC systems." International Journal of Microwave and Wireless Technologies 4, no. 1 (January 5, 2012): 81–91. http://dx.doi.org/10.1017/s1759078711001085.

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LInear amplification using Non-linear Components (LINC) is an architecture that achieves linear power amplification for radio-frequency (RF) transmitters. This paper describes the impact of RF power amplifiers (PAs) class on the overall system performances. The linearity and efficiency of the LINC transmitter with different PA classes (AB, B, C, D, E, F, F−1, and J) are evaluated and compared, in terms of error vector magnitude (EVM), adjacent channel leakage ratio (ACLR), and power added efficiency (PAE), for a 16QAM modulation having 5.6 dB peak to average power ratio. Simulations are perfor

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Aller, Daniel G., Diego G. Lamar, Juan Rodriguez, Pablo F. Miaja, Valentin Francisco Romero, Jose Mendiolagoitia, and Javier Sebastian. "Adapting Techniques to Improve Efficiency in Radio Frequency Power Amplifiers for Visible Light Communications." Electronics 9, no. 1 (January 10, 2020): 131. http://dx.doi.org/10.3390/electronics9010131.

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It is well known that modern wireless communications systems need linear, wide bandwidth, efficient Radio Frequency Power Amplifiers (RFPAs). However, conventional configurations of RFPAs based on Class A, Class B, and Class AB exhibit extremely low efficiencies when they manage signals with a high Peak-to-Average Power Ratio (PAPR). Traditionally, a number of techniques have been proposed either to achieve linearity in the case of efficient Switching-Mode RFPAs or to improve the efficiency of linear RFPAs. There are two categories in the application of aforementioned techniques. First, techni

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Sombrin, Jacques B. "Optimization criteria for power amplifiers." International Journal of Microwave and Wireless Technologies 3, no. 1 (February 2011): 35–45. http://dx.doi.org/10.1017/s1759078710000863.

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This paper describes existing and new criteria for comparison and optimization of non-linear power amplifiers such as RF or microwave transmitters. In addition to intermodulation, receiver noise, and losses in the transmission system, the proposed new criteria take into account efficiency or consumed power. This results in the global optimization of a combined signal-to-noise-plus-intermodulation ratio as a function of saturated or nominal power but also consumed or dissipated power. Saturated power is limited by available technology. Consumed power and dissipated power are some of the main co

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Cui, Xingli, Xin Qiu, Yongqing Leng, Xiaotian Liu, and Tianyu Wu. "A Maximum Efficiency-86% Hybrid Power Modulator for 5G New Radio(NR) Applications." Applied Sciences 12, no. 23 (November 25, 2022): 12041. http://dx.doi.org/10.3390/app122312041.

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A hybrid power modulator is presented for the radio frequency (RF) power amplifiers of 5th generation mobile communication technology (5G) new radio (NR) applications. A hybrid power modulator utilizing a two-level switching converter and a broadband and high-efficiency linear amplifier is presented. A further improvement in the efficiency of the circuit is achieved by using an optimized supply voltage of the two-level switching converters of 4.5 V. In this way, the overall efficiency is improved by more than 5% compared to using a 5 V supply voltage. The linear amplifier consists of four stag

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Sarker, Md, and Ickhyun Song. "Design and Analysis of fT-Doubler-Based RF Amplifiers in SiGe HBT Technology." Electronics 9, no. 5 (May 8, 2020): 772. http://dx.doi.org/10.3390/electronics9050772.

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For performance-driven systems such as space-based applications, it is important to maximize the gain of radio-frequency amplifiers (RFAs) with a certain tolerance against radiation, temperature effects, and small form factor. In this work, we present a K-band, compact high-gain RFA using an fT-doubler topology in a silicon-germanium (SiGe) heterojunction bipolar transistors (HBTs) technology platform. The through-silicon vias (TSVs), typically used for small-size chip packaging purposes, have been effectively utilized as an adjustable matching element for input impedance, reducing the overall

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Lee, Y. H., Y. Chong, and Y. K. Semertzidis. "Review of low-noise radio-frequency amplifiers based on superconducting quantum interference device." Progress in Superconductivity and Cryogenics 16, no. 4 (December 31, 2014): 1–6. http://dx.doi.org/10.9714/psac.2014.16.4.001.

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Bassoo, V., L. Linton, and M. Faulkner. "Analysis of distortion in pulse modulation converters for switching radio frequency power amplifiers." IET Microwaves, Antennas & Propagation 4, no. 12 (2010): 2088. http://dx.doi.org/10.1049/iet-map.2010.0079.

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JAIN, AKHILESH, D. K. SHARMA, A. K. GUPTA, P. R. HANNURKAR, and S. K. PATHAK. "Compact solid state radio frequency amplifiers in kW regime for particle accelerator subsystems." Sadhana 38, no. 4 (August 2013): 667–78. http://dx.doi.org/10.1007/s12046-013-0154-0.

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Mao, Yuzhou, Shuai Yuan, Yanping Zhao, Gen Chen, Lei Wang, Xu Deng, Diye Xue, et al. "Development of the High Radio Frequency Power Amplifiers for ICRF Heating in EAST." Fusion Science and Technology 61, no. 3 (April 2012): 216–26. http://dx.doi.org/10.13182/fst61-216-226.

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Memon, M. I., M. Siraj, H. Fathallah, and M. S. Khan. "Radio Frequency Generator Using Four Wave Mixing in Cascaded Nonlinear Semiconductor Optical Amplifiers." Acta Physica Polonica A 129, no. 4 (April 2016): 832–34. http://dx.doi.org/10.12693/aphyspola.129.832.

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Lu, X. "An alternative approach to improving the efficiency of high power radio frequency amplifiers." IEEE Transactions on Broadcasting 38, no. 2 (June 1992): 85–89. http://dx.doi.org/10.1109/11.142658.

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Gamkrelidze, S. A., D. L. Gnatyuk, O. S. Matveenko, S. A. Bugaev, R. R. Galiev, A. V. Zuev, D. V. Lavrukhin, et al. "Development of Monolithic Integrated Circuits on Gallium Nitride Heterostructures." Nano- i Mikrosistemnaya Tehnika 24, no. 2 (February 21, 2022): 55–66. http://dx.doi.org/10.17587/nmst.24.55-66.

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The article describes IUHFSE RAS experience in designing MMICs based on gallium nitride heterostructures on various types of substrates: sapphire, silicon and silicon carbide in the frequency range from 10 GHz to 96 GHz. Such as power amplifiers, low-noise amplifiers, and a chipset for radio communications and radiolocation: voltage-controlled oscillators, mixers, multi¬pliers, and transceiver MMIC with integrated antennas. HEMT transistors based on gallium nitride are a suitable for creating a radiation resistant components for frequencies up to 100 GHz.

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Sak, P. V. "Integrated estimation of parameters of radio transmitter power amplifier with automatic mode adjustment by two-frequency test signal." Omsk Scientific Bulletin, no. 176 (2021): 59–64. http://dx.doi.org/10.25206/1813-8225-2021-176-59-64.

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Comparative estimation of energy parameters of power amplifiers of single-band radio transmitters using automatic mode adjustment using a deterministic two-frequency test signal instead of a random single-band signal modulated by speech is investigated in the work. Relationships are found that allow judging the power consumption of the terminal stage of the power amplifier with automatic mode adjustment under various types of modulation based on the results of measurements obtained during tests. The ratios between the power consumption of the output stage when amplifying the random speech sign

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Rehman, Saeed Ur, Shafiq Alam, and Iman T. Ardekani. "An Overview of Radio Frequency Fingerprinting for Low-End Devices." International Journal of Mobile Computing and Multimedia Communications 6, no. 3 (July 2014): 1–21. http://dx.doi.org/10.4018/ijmcmc.2014070101.

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RF fingerprinting is proposed as a means of providing an additional layer of security for wireless devices. A masquerading or impersonation attacks can be prevented by establishing the identity of wireless transmitter using unique transmitter RF fingerprint. Unique RF fingerprints are attributable to the analog components (digital-to-analog converters, band-pass filters, frequency mixers and power amplifiers) present in the RF front ends of transmitters. Most of the previous researches have reported promising results with an accuracy of up to 99% using high-end receivers (e.g. Giga-sampling ra

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Ragonese, Egidio. "Design Techniques for Low-Voltage RF/mm-Wave Circuits in Nanometer CMOS Technologies." Applied Sciences 12, no. 4 (February 17, 2022): 2103. http://dx.doi.org/10.3390/app12042103.

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This paper reviews state-of-the-art design approaches for low-voltage radio frequency (RF) and millimeter-wave (mm-wave) CMOS circuits. Effective design techniques at RF/mm-wave frequencies are described, including body biasing in fully depleted (FD) silicon-on-insulator (SOI) CMOS technologies and circuit topologies based on integrated reactive components (i.e., capacitors, inductors and transformers). The application of low-voltage design techniques is discussed for the main RF/mm-wave circuit blocks, i.e., low-noise amplifiers (LNAs), mixers and power amplifiers (PAs), highlighting the main

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Giofrè, Rocco, Paolo Colantonio, Franco Giannini, Chiara Ramella, Vittorio Camarchia, Mustazar Iqbal, Marco Pirola, and Roberto Quaglia. "A comprehensive comparison between GaN MMIC Doherty and combined class-AB power amplifiers for microwave radio links." International Journal of Microwave and Wireless Technologies 8, no. 4-5 (February 11, 2016): 673–81. http://dx.doi.org/10.1017/s175907871600012x.

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A combined class-AB and a Doherty power amplifier conceived for microwave backhaul in the 7 GHz frequency band are here presented and compared. They are fabricated in the same GaN monolithic process and have identical total active device periphery. For the given application, the linearity-efficiency trade-off for the two architectures is discussed. The two modules have been thoroughly characterized in linear and non-linear continuous wave conditions. Then, to evaluate linearity under the actual operative conditions, a system level characterization has been carried out, applying a modulated inp

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