Anechoic chambers (electromagnetic), Antenna radiation patterns, Antenna testing, Injection locked oscillators

Callaghan, Peter and Sagor, Md. Hasanuzzaman (2014) Measurement of Antenna Radiation Pattern using Injection Locking Technique. In: The 8th European Conference on Antennas and Propagation (EuCAP 2014). IEEE, Den Haag World Forum, The Hague, The Netherland, pp. 1066-1069. ISBN 978-88-907018-4-9 (doi:https://doi.org/10.1109/EuCAP.2014.6901952)

Antennas, Frequency selective surfaces, Spatial filtering

Callaghan, Peter, Huelin, Robin and Sagor, Md. Hasanuzzaman (2016) Double-layer grid filter for control of wireless signal propagation within buildings. In: 2015 Loughborough Antennas & Propagation Conference (LAPC). IEEE, pp. 25-29. ISBN 978-1-4799-8944-7 (doi:https://doi.org/10.1109/LAPC.2015.7366030)

Diplexer, Filter, Multi-port filtering network

Ogbodo, Eugene, Wu, Yun, Callaghan, Peter and Wang, Yi (2017) Asynchronously coupled resonant junctions for diplexers and multiport filtering networks. Microwave and Optical Technology Letters, 59 (12). pp. 3046-3051. ISSN 0895-2477 (Print), 1098-2760 (Online) (doi:https://doi.org/10.1002/mop.30877)

Split Ring Resonator, Asynchronous coupling, Synchronous coupling, Diplexer

Ogbodo, Eugene A., Wu, Yun, Callaghan, Peter and Wang, Yi (2017) A compact diplexer with a split-ring resonator junction. Microwave and Optical Technology Letters, 59 (9). pp. 2385-2390. ISSN 0895-2477 (Print), 1098-2760 (Online) (doi:https://doi.org/10.1002/mop.30740)

UWB personal area networks, optically fed phase, antenna feeds, broadband antennas, linear antenna arrays, optical arrays, optical fiber cables, optical fiber networks, personal area networks, phased arrays, photodiodes, radio frequency

Callaghan, Peter, Gomes, Nathan J., Batchelor, John C. and Formont, Stephane (2009) Experimental investigation of an optically fed phase array for UWB personal area networks. In: International Topical Meeting on Microwave Photonics, 2009. MWP '09. Universidad Politécnica de Valencia, Valencia, Spain. ISBN 978-1-4244-4788-6

Wireless local area network signals; Building frequency selective surface; Simple double layer grid plane wave filter structure; Multiple transmission bands; Cellular phone frequencies

Callaghan, Peter, Sagor, Md. Hasanuzzaman and Huelin, Robin (2016) Investigation into use of double-layer grid structures as frequency selective surfaces for buildings. IET Microwaves, Antennas & Propagation, 10 (13). pp. 1372-1377. ISSN 1751-8725 (Print), 1751-8733 (Online) (doi:https://doi.org/10.1049/iet-map.2016.0065)

amplifier, linearisation, gain, intermodulation distortion, negative impedance, compensation

Ali, M. Tanseer, Wu, Ruiheng, Callaghan, Peter and Rapajic, Predrag (2014) Highly linear RF amplifier design: theoretical analysis and experimental study. International Journal of Electronics, 101 (1). pp. 98-112. ISSN 0020-7217 (Print), 1362-3060 (Online) (doi:https://doi.org/10.1080/00207217.2013.769189)

amplifier, linearisation, negative impedance compensation

Ali, M. Tanseer, Wu, Ruiheng, Callaghan, Peter and Rapajic, Predrag (2012) Experimental study of a highly linear amplifier using negative impedance compensation technique. In: Active RF Devices, Circuits and Systems Seminar. IET Conference Publications . IET, pp. 35-38. ISBN 978-1849195409 (doi:https://doi.org/10.1049/ic.2011.0211)

amplifier, linearisation, negative impedance compensation, Volterra analysis

Ali, M. Tanseer, Wu, Ruiheng, Callaghan, Peter and Rapajic, Predrag (2011) Design of a highly linear high frequency amplifier using Volterra model. In: Microwave, Antenna, Propagation, and EMC Technologies for Wireless Communications (MAPE). Microwave, Antenna, Propagation, and EMC Technologies for Wireless Communications (MAPE) . Institute of Electrical and Electronic Engineers, Pistacaway, USA, pp. 355-358. ISBN 978-1-4244-8268-9 (doi:https://doi.org/10.1109/MAPE.2011.6156259)

aqueous solutions, blood glucose levels, blood glucose monitoring, complex permittivity, concentration measurement, dielectric spectroscopy, microwave cavity perturbation

Dobson, R., Wu, Ruiheng and Callaghan, P. (2012) Blood glucose monitoring using microwave cavity perturbation. Electronics Letters, 48 (15). pp. 905-906. ISSN 0013-5194 (doi:https://doi.org/10.1049/el.2012.1811)

balanced antenna, differential amplifier, free space path loss, power amplifier (PA)

Sagor, Md Hasanuzzaman and Callaghan, Peter (2014) Benefits of active transmit balanced antenna fed by differential power amplifier. In: 2014 Loughborough Antennas and Propagation Conference (LAPC). Institute of Electrical and Electronics Engineers Inc., Piscataway, NJ, USA, pp. 732-735. ISBN 9781479936625 (doi:https://doi.org/10.1109/LAPC.2014.6996499)

choke-slot, FR4 substrate, mobile communication system, Personal Communication Service (PCS 1900) band

Callaghan, Peter, Sagor, Md. Hasanuzzaman and Batchelor, John C. (2011) Control of ground plane influence on antenna radiation pattern for mobile handheld devices. In: 2011 Loughborough Antennas and Propagation Conference (LAPC). Institute of Electrical and Electronics Engineers, Inc., Piscataway, NJ, USA, pp. 1-4. ISBN 978-1-4577-1014-8 (doi:https://doi.org/10.1109/LAPC.2011.6114127)

microwave integrated circuits, amplifiers, CMOS integrated circuits

Ali, M. Tanseer, Wu, Ruiheng, Mao, Luhong, Callaghan, Peter and Rapajic, Predrag (2014) High frequency CMOS amplifier with improved linearity. IET Circuits, Devices & Systems, 8 (6). pp. 450-458. ISSN 1751-858X (Print), 1751-8598 (Online) (doi:https://doi.org/10.1049/iet-cds.2013.0327)

mobile antennas, multiple-band antennas,stacked microstrip antennas.

Callaghan, Peter and Batchelor, John C. (2008) Multiband low-profile antenna for remote antenna unit picocell applications. IEEE Transactions on Antennas and Propagation, 56 (8). pp. 2475-2480. ISSN 0018-926X (doi:https://doi.org/10.1109/TAP.2008.927558)

multiband antennas, pin-loaded patches, radio over fiber, remote antenna units

Callaghan, Peter and Batchelor, John C. (2008) Dual-band pin-patch antenna for wi-fi applications. IEEE Antennas and Wireless Propagation Letters, 7. pp. 757-760. ISSN 1536-1225 (doi:https://doi.org/10.1109/LAWP.2008.2004885)