Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

Browse by Current Cardiff authors

Up a level
Export as [feed] Atom [feed] RSS 1.0 [feed] RSS 2.0
Number of items: 50.

Bogusz, Aleksander, Lees, Jonathan, Quaglia, Roberto, Watkins, Gareth and Cripps, Steve 2019. Wideband compact planar balun for applications in outphasing and push-pull amplifiers. Electronics Letters 55 (16) , pp. 912-914. 10.1049/el.2018.7915
file

Quaglia, Roberto, Greene, Mark D., Poulton, Matthew J. and Cripps, Steve C. 2019. A 1.8-3.2 GHz Doherty Power Amplifier in quasi-MMIC Technology. IEEE Microwave and Wireless Components Letters 29 (5) , pp. 345-347. 10.1109/LMWC.2019.2904883
Item availability restricted.
file

Alt, Alexander, Chen, Peng, Alsahali, Sattam, Wang, Guofeng, Quaglia, Roberto, Tasker, Paul and Lees, Jonathan 2019. Impact of the input impedance on the linearity of supply modulated GaN HEMT power amplifiers. Presented at: European Microwave Week 2019 (EuMW2019), 29 September - 03 October 2019.

Alt, Alexander, Quaglia, Roberto, Chen, Peng, Alsahali, Sattam, Tasker, Paul and Lees, Jonathan 2019. Class B* - A new high efficiency RF DC/DC converter concept using second harmonic generation/injection. Presented at: WPTC 2018: IEEE MTT-S Wireless Power Transfer Conference, Montreal, Quebec, 3-7 June 2018. 2018 IEEE Wireless Power Transfer Conference (WPTC). IEEE, 10.1109/WPT.2018.8639317

Quaglia, Roberto and Lees, Jonathan 2019. Simplified analysis of the effect of load variation in common Doherty power amplifier architectures. Presented at: 2019 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR), Orlando, FL, USA, 20-23 Jan 2019. IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR). IEEE,
file

Quaglia, Roberto, Powell, Jeffrey and Collins, David 2019. Load modulated balanced amplifier. In: Webster, John G. ed. The Wiley Encyclopedia of Electrical and Electronics Engineering, Wiley-Blackwell, -.
Item availability restricted.
file

Alt, Alexander, Quaglia, Roberto, Chen, Peng, Alsahali, Sattam, Tasker, Paul J. and Lees, Jonathan 2018. Analysis of highly efficient self-synchronous class-F microwave rectifiers using waveform engineering. Presented at: 48th European Microwave Conference (EuMC), Madrid, Spain, 23-27 Sep 2018. Proceedings of the 48th European Microwave Conference. Piscataway, NJ: IEEE, pp. 773-776. 10.23919/EuMC.2018.8541564

Piacibello, Anna, Quaglia, Roberto, Camarchia, Vittorio, Ramella, Chiara and Pirola, Marco 2018. Dual-input driving strategies for performance enhancement of a doherty power amplifier. Presented at: 2018 IEEE MTT-S International Wireless Symposium (IWS), Chengdu, China, 6-10 May 2018. 2018 IEEE MTT-S International Wireless Symposium (IWS). IEEE, 10.1109/IEEE-IWS.2018.8400845

Quaglia, Roberto, Camarchia, Vittorio and Pirola, Marco 2018. K-band combined GaAs monolithic Doherty power amplifier. Presented at: 2018 IEEE MTT-S International Wireless Symposium (IWS), Chengdu, China, 6-10 May 2018. 2018 IEEE MTT-S International Wireless Symposium (IWS2018). IEEE, 10.1109/IEEE-IWS.2018.8400882

Powell, J. R., Shepphard, D. J., Quaglia, R. and Cripps, S. C. 2018. A power reconfigurable high-efficiency $X$ -band power amplifier MMIC using the load modulated balanced amplifier technique. IEEE Microwave and Wireless Components Letters 28 (6) , pp. 527-529. 10.1109/LMWC.2018.2824560

Quaglia, Roberto, Powell, Jeff, Shepphard, Dan, Tasker, Paul and Cripps, Steve 2018. Analysis and characterization of a load modulated balanced amplifier for base-station applications. Presented at: 2018 11th German Microwave Conference (GeMiC), Freiburg, Germany, 12-14 March 2018. 2018 11th German Microwave Conference (GeMiC). IEEE, pp. 1-4. 10.23919/GEMIC.2018.8335013

Quaglia, Roberto and Cripps, Stephen 2018. A load modulated balanced amplifier for telecom applications. IEEE Transactions on Microwave Theory and Techniques 66 (3) , pp. 1328-1338. 10.1109/TMTT.2017.2766066
file

Bogusz, Aleksander, Costello, Zack,, Quaglia, Roberto, Bell, James, Lees, Jonathan, Tasker, Paul and Cripps, Stephen 2018. Power and efficiency continuous modes in saturated GaN HEMT devices. Presented at: Inmmic 2018, Brive-La-Gaillarde, France, 5- 6 July 2018.
file

Collins, David, Quaglia, Roberto, Powell, Jeff and Cripps, Stephen 2018. Experimental characterization of a load modulated balanced amplifier with simplified input power splitter. Presented at: APMC 2018, Kyoto, Japan, 6-9 Nov 2018.
file

Moreno Rubio, Jorge Julian, Camarchia, Vittorio, Pirola, Marco and Quaglia, Roberto 2017. Design of a 87% fractional bandwidth Doherty Power Amplifier supported by a simplified bandwidth estimation method. IEEE Transactions on Microwave Theory and Techniques 66 (3) , pp. 1319-1327. 10.1109/TMTT.2017.2767586
file

Ramella, Chiara, Piacibello, Anna, Quaglia, Roberto, Camarchia, Vittorio and Pirola, Marco 2017. High efficiency power amplifiers for modern mobile communications: The load-modulation approach. Electronics 6 (4) , 96. 10.3390/electronics6040096
file

Quaglia, Roberto, Greene, Mark D., Poulton, Matthew J. and Cripps, Steve C. 2017. Design and characterization of a 1.7?2.7 GHz quasi-MMIC Doherty power amplifier. Presented at: 2017 IEEE MTT-S International Microwave Symposium (IMS), Honololu, HI, USA, 4-9 June 2017. 2017 IEEE MTT-S International Microwave Symposium (IMS). IEEE, pp. 771-773. 10.1109/MWSYM.2017.8058689

Camarchia, V, Colantonio, P, Giannini, F, Giofre, R, JIang, T, Pirola, M, Quaglia, Roberto and Ramella, C 2017. A design strategy for AM/PM compensation in GaN Doherty power amplifiers. IEEE Access 5 , pp. 22244-22251. 10.1109/ACCESS.2017.2759164
file

Camarchia, Vittorio, Quaglia, Roberto, Ramella, Chiara and Pirola, Marco 2017. Power amplifier MMICs for 15 GHz microwave links in 0.25 mu m GaN technology. Presented at: 2017 Integrated Nonlinear Microwave and Millimetre-wave Circuits Workshop (INMMiC), Graz, Austria, 20-21 April 2017. 2017 Integrated Nonlinear Microwave and Millimetre-wave Circuits Workshop (INMMiC). IEEE, 10.1109/INMMIC.2017.7927311

Quaglia, Roberto, Bell, James Joseph and Cripps, Stephen Charles 2017. New general formulation and experimental verification of harmonic clipping contours in high frequency power devices. IEEE Transactions on Microwave Theory and Techniques 65 (10) , pp. 3903-3909. 10.1109/TMTT.2017.2687900
file

Quaglia, Roberto, Camarchia, Vittorio, Moreno Rubio, Jorge, Pirola, Marco and Ghione, Giovanni 2017. A 4W Doherty power amplifier in GaN MMIC technology for 15GHz applications. IEEE Microwave and Wireless Components Letters 27 (4) , pp. 365-367. 10.1109/LMWC.2017.2678440
file

Quaglia, Roberto, Shepphard, Daniel and Cripps, Stephen 2017. A reappraisal of optimum output matching conditions in microwave power transistors. IEEE Transactions on Microwave Theory and Techniques 65 (3) , pp. 838-845. 10.1109/TMTT.2016.2627557
file

Quaglia, Roberto and Cripps, Stephen Charles 2017. Harmonic clipping contours: numerical computation and extension to higher harmonics. Presented at: European Microwave Conference, London, UK, 3-7 Oct. 2016. Microwave Conference (EuMC), 2016 46th European. IEEE, pp. 405-408. 10.1109/EuMC.2016.7824365
file

Camarchia, Vittorio, Cipriani, Elisa, Colantonio, Paolo, Pirola, Marco, Quaglia, Roberto, Cabria, Lorena and Ayllon, Natanael 2016. Characterization of a high power GaN device for class E PA design with non-sinusoidal stimulus. Presented at: 2016 11th European Microwave Integrated Circuits Conference (EuMIC), London, UK, 3-4 October 2016. Microwave Integrated Circuits Conference (EuMIC), 2016 11th European. IEEE, p. 53. 10.1109/EuMIC.2016.7777487

Ramella, Chiara, Piacibello, Anna, Camarchia, Vittorio, Pirola, Marco and Quaglia, Roberto 2016. Characterization-oriented design of a compact GaAs MMIC 3-stacked power cell. Presented at: Microwave, Radar and Wireless Communications (MIKON), 2016 21st International Conference on, Krakow, Poland, 9-11 May 2016. Microwave, Radar andWireless Communications (MIKON), 2016 21st International Conference on. IEEE, 10.1109/MIKON.2016.7491950

Iqbal, Mustazar, Camarchia, Vittorio, Pirola, Marco and Quaglia, Roberto 2016. A miniaturized wilkinson power divider for ultra wide-band operation. Presented at: 2016 21st International Conference on Microwave, Radar and Wireless Communications (MIKON), 2016 21st International Conference on Microwave, Radar and Wireless Communications (MIKON). IEEE, 10.1109/MIKON.2016.7492081

Moreno Rubio, Jorge, Camarchia, Vittorio, Quaglia, Roberto, Ferney, Angarita Malaver Edison and Pirola, Marco 2016. A 0.6-3.8GHz GaN Power Amplifier designed through a simple strategy. IEEE Microwave and Wireless Components Letters 26 (6) , pp. 446-448. 10.1109/LMWC.2016.2549263
file

Giofrè, Rocco, Colantonio, Paolo, Giannini, Franco, Ramella, Chiara, Camarchia, Vittorio, Iqbal, Mustazar, Pirola, Marco and Quaglia, Roberto 2016. 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 (4-5) , pp. 673-681. 10.1017/S175907871600012X

Quaglia, Roberto, Camarchia, Vittorio, Pirola, Marco and Ghione, Giovanni 2016. GaN monolithic power amplifiers for microwave backhaul applications. Electronics 5 (2) , 25. 10.3390/electronics5020025
file

Camarchia, Vittorio, Pirola, Marco, Quaglia, Roberto, Jee, Seunghoon, Cho, Yunsung and Kim, Bumman 2015. The Doherty power amplifier: review of recent solutions and trends. IEEE Transactions on Microwave Theory and Techniques 63 (2) , pp. 559-571. 10.1109/TMTT.2014.2387061

Giofre, R., Piazzon, L., Colantonio, P., Giannini, F., Camarchia, V., Quaglia, Roberto, Pirola, M. and Ramella, C. 2015. GaN-MMIC Doherty power amplifier with integrated reconfigurable input network for microwave backhaul applications. Presented at: 2015 IEEE MTT-S International Microwave Symposium (IMS), Phoenix, AZ, 17-22 May 2015. 2015 IEEE MTT-S International Microwave Symposium (IMS). IEEE, 10.1109/MWSYM.2015.7166763

Fersch, T., Quaglia, Roberto, Pirola, M., Camarchia, V., Ramella, C., Khoshkholgh, A. Javan, Ghione, G. and Weigel, R. 2015. Stacked GaAs pHEMTs: Design of a K-band power amplifier and experimental characterization of mismatch effects. Presented at: 2015 IEEE MTT-S International Microwave Symposium (IMS), Phoenix, AZ, 17-22 May 2015. 2015 IEEE MTT-S International Microwave Symposium (IMS). IEEE, 10.1109/MWSYM.2015.7166762

Chiolerio, Alessandro, Camarchia, Vittorio, Quaglia, Roberto, Pirola, Marco, Pandolfi, Paolo and Pirri, Candido Fabrizio 2014. Hybrid Ag-based inks for nanocomposite inkjet printed lines: RF properties. Journal of Alloys and Compounds 615 (Supp 1) , S501-S504. 10.1016/j.jallcom.2013.12.174

Quaglia, Roberto, Camarchia, Vittorio, Pirola, Marco, Moreno Rubio, Jorge and Ghione, Giovanni 2014. Linear GaN MMIC combined power amplifiers for 7-GHz microwave backhaul. IEEE Transactions on Microwave Theory and Techniques 62 (11) , pp. 2700-2710. 10.1109/TMTT.2014.2359856

Quaglia, Roberto, Camarchia, Vittorio, Tao, Jiang, Pirola, Marco, Donati Guerrieri, Simona and Loran, Brian 2014. K-Band GaAs MMIC Doherty Power Amplifier for Microwave Radio With Optimized Driver. IEEE Transactions on Microwave Theory and Techniques 62 (11) , pp. 2518-2525. 10.1109/TMTT.2014.2360395

Pirola, Marco, Quaglia, Roberto, Ghione, Giovanni, Ciccognani, Walter and Limiti, Ernesto 2014. 13-bit GaAs serial-to-parallel converter with compact layout for core-chip applications. Microelectronics Journal 45 (7) , pp. 864-869. 10.1016/j.mejo.2014.04.036

Piazzon, Luca, Giofre, Rocco, Quaglia, Roberto, Camarchia, Vittorio, Pirola, Marco, Colantonio, Paolo, Giannini, Franco and Ghione, Giovanni 2014. Effect of load modulation on phase distortion in Doherty power amplifiers. IEEE Microwave and Wireless Components Letters 24 (7) , pp. 505-507. 10.1109/LMWC.2014.2316507

Quaglia, Roberto, Camarchia, Vittorio and Pirola, Marco 2014. Dual-band GaN MMIC power amplifier for microwave backhaul applications. IEEE Microwave and Wireless Components Letters 24 (6) , pp. 409-411. 10.1109/LMWC.2014.2313587

Quaglia, Roberto, Giannini, F., Colantonio, P., Piazzon, L., Ghione, G., Camarchia, V., Giofrè, R. and Pirola, M. 2014. Experimental investigation of bias current and load modulation effects in phase distortion of GaN HEMTs. Electronics letters 50 (10) , pp. 773-775. 10.1049/el.2014.0983

Camarchia, Vittorio, Chiolerio, Alessandro, Cotto, Marco, Fang, Jie, Ghione, Giovanni, Pandolfi, Paolo, Pirola, Marco, Quaglia, Roberto and Ramella, Chiara 2014. Demonstration of inkjet-printed silver nanoparticle microstrip lines on alumina for RF power modules. Organic Electronics 15 (1) , pp. 91-98. 10.1016/j.orgel.2013.10.018

Camarchia, Vittorio, Moreno Rubio, Jorge, Pirola, Marco, Quaglia, Roberto, Colantonio, Paolo, Giannini, Franco, Giofre, Rocco, Piazzon, Luca, Emanuelsson, Thomas and Wegeland, Tobias 2013. High-Efficiency 7 GHz Doherty GaN MMIC Power Amplifiers for mackhaul radio links. IEEE Transactions of Electron Devices 60 (10) , pp. 3592-3595. 10.1109/TED.2013.2274669

Camarchia, V., Fang, Jie, Ghione, G., Khoshkholgh, A. Javan, Moreno Rubio, J., Pirola, M., Quaglia, R. and Ramella, C. 2013. Bandwidth extension of GaN Doherty power amplifier: Effect on power, efficiency and linearity. Presented at: 2013 IEEE International Wireless Symposium (IWS), Beijing, China, 14-18 April 2013. 2013 IEEE International Wireless Symposium (IWS). IEEE, pp. 1-4. 10.1109/IEEE-IWS.2013.6616789

Quaglia, Roberto, Pirola, Marco and Ramella, Chiara 2013. Offset lines in Doherty Power Amplifiers: analytical demonstration and design. IEEE Microwave and Wireless Components Letters 23 (2) , pp. 93-95. 10.1109/LMWC.2013.2241535

Camarchia, Vittorio, Fang, Jie, Moreno Rubio, Jorge, Pirola, Marco and Quaglia, Roberto 2013. 7 GHz MMIC GaN Doherty Power Amplifier with 47% efficiency at 7 dB output back-off. IEEE Microwave and Wireless Components Letters 23 (1) , pp. 34-36. 10.1109/LMWC.2012.2234090

Fang, Jie, Moreno Rubio, Jorge, Quaglia, Roberto, Camarchia, Vittorio, Pirola, Marco, Guerrieri, Simona Donati, Ramella, Chiara and Ghione, Giovanni 2012. 3.5 GHz WiMAX GaN doherty power amplifier with second harmonic tuning. Microwave and Optical Technology Letters 54 (11) , pp. 2601-2605. 10.1002/mop.27132

Moreno Rubio, Jorge, Fang, Jie, Camarchia, Vittorio, Quaglia, Roberto, Pirola, Marco and Ghione, Giovanni 2012. 3–3.6-GHz wideband GaN Doherty Power Amplifier exploiting output compensation stages. IEEE Transactions on Microwave Theory and Techniques 60 (8) , pp. 2543-2548. 10.1109/TMTT.2012.2201745

Moreno Rubio, Jorge, Fang, Jie, Quaglia, Roberto, Camarchia, Vittorio, Pirola, Marco and Ghione, Giovanni 2012. Development of single-stage and doherty GaN-based hybrid RF power amplifiers for quasi-constant envelope and high peak to average power ratio wireless standards. Microwave and Optical Technology Letters 54 (1) , pp. 206-210. 10.1002/mop.26459

Moreno Rubio, Jorge, Fang, Jie, Quaglia, R., Camarchia, V., Pirola, M., Donati Guerrieri, S. and Ghione, G. 2011. A 22W 65% efficiency GaN Doherty Power Amplifier at 3.5 GHz for WiMAX applications. Presented at: 2011 Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits, Vienna, Austria, 18-19 April 2011. Integrated Nonlinear Microwave and Millimeterwave Circuits, INMMIC, International Workshop on. IEEE, p. 1. 10.1109/INMMIC.2011.5773332

Quaglia, Roberto, Camarchia, Vittorio, Cappelluti, Federica, Guerrieri, Simona Donati, Lima, Eduardo G., Ghione, Giovanni and Pirola, Marco 2009. Behavioral modeling of GaN-based power amplifiers: impact of electrothermal feedback on the model accuracy and identification. Microwave and Optical Technology Letters 51 (11) , pp. 2789-2792. 10.1002/mop.24732

Alt, Alexander, Chen, Peng, Alsahali, Sattam, Quaglia, Roberto, Tasker, Paul and Lees, Jonathan Comparing FET technologies in terms of their suitability for broadband envelope tracking power amplifiers. Presented at: InMMIC, Brive La Gaillarde, 5-6 July 2018.

This list was generated on Sun Sep 15 05:00:32 2019 BST.