Publications
255 results found
Otter WJ, Hanham SM, Ridler NM, et al., 2014, 100 GHz ultra-high Q-factor photonic crystal resonators, SENSORS AND ACTUATORS A-PHYSICAL, Vol: 217, Pages: 151-159, ISSN: 0924-4247
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- Citations: 34
Otter WJ, Hu F, Hazell JF, et al., 2014, THz metal mesh filters on electrically thick fused silica substrates, Infrared Milliemter-Wave andTHz Waves Conference, Publisher: IEEE
This paper shows simulated and measured results of ultra-low cost metal mesh filters on electrically thick substrates for millimeter-wave and THz bands. It provides a broad overview of metal mesh filters currently available and suggest why it is worth moving to an electrically thick substrate for ultra-low cost applications. We demonstrate scalable traditional metal mesh filters on 525 μm thick fused silica substrates. In addition, trapped-mode excitation is exploited to improve out-of-band rejection at higher frequencies. The measured results prove that these filters are scalable in the THz range using cost-effective micromachining manufacturing. This work opens up the possibility of using electrically thick metal mesh filters for ultra-low cost applications.
Jose Sanchez-Martinez J, Marquez-Segura E, Lucyszyn S, 2014, Design of Compact Wideband Bandpass Filters Based on Multiconductor Transmission Lines With Interconnected Alternate Lines, IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, Vol: 24, Pages: 454-456, ISSN: 1531-1309
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- Citations: 10
Liang X, Hu F, Yan Y, et al., 2014, Secure thermal infrared communications using engineered blackbody radiation, Scientific Reports, Vol: 4, Pages: 1-7
The thermal (emitted) infrared frequency bands, from 20–40 THz and 60–100 THz, are best known for applications in thermography. This underused and unregulated part of the spectral range offers opportunities for the development of secure communications. The ‘THz Torch’ concept was recently presented by the authors. This technology fundamentally exploits engineered blackbody radiation, by partitioning thermally-generated spectral noise power into pre-defined frequency channels; the energy in each channel is then independently pulsed modulated and multiplexing schemes are introduced to create a robust form of short-range secure communications in the far/mid infrared. To date, octave bandwidth (25–50 THz) single-channel links have been demonstrated with 380 bps speeds. Multi-channel ‘THz Torch’ frequency division multiplexing (FDM) and frequency-hopping spread-spectrum (FHSS) schemes have been proposed, but only a slow 40 bps FDM scheme has been demonstrated experimentally. Here, we report a much faster 1,280 bps FDM implementation. In addition, an experimental proof-of-concept FHSS scheme is demonstrated for the first time, having a 320 bps data rate. With both 4-channel multiplexing schemes, measured bit error rates (BERs) of < 10−6 are achieved over a distance of 2.5 cm. Our approach represents a new paradigm in the way niche secure communications can be established over short links.
Hu F, Lucyszyn S, 2014, Emerging thermal infrared ‘THz Torch’ technology for low-cost security and defence applications, THz and Security Applications: Detectors, Sources and Associated Electronics for THz Applications, Editors: Sizov, Corsi, Publisher: Springer Netherlands, Pages: 239-275, ISBN: 978-94-017-8827-4
Carvalho NB, Georgiadis A, Costanzo A, et al., 2014, Wireless Power Transmission: R&D Activities Within Europe, IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, Vol: 62, Pages: 1031-1045, ISSN: 0018-9480
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- Citations: 117
Papantonis S, Ridler NM, Lucyszyn S, 2014, Rectangular waveguide enabling technology using holey surfaces and wire media metamaterials, SENSORS AND ACTUATORS A-PHYSICAL, Vol: 209, Pages: 1-8, ISSN: 0924-4247
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- Citations: 6
Papantonis S, Lucyszyn S, Shamonina E, 2014, Dispersion effects in Fakir's bed of nails metamaterial waveguides, JOURNAL OF APPLIED PHYSICS, Vol: 115, ISSN: 0021-8979
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- Citations: 6
Lawson J, Pinuela M, Yates DC, et al., 2014, Long range inductive power transfer system, Journal of Physics : Conference Series, Vol: 476, Pages: 1-6, ISSN: 1742-6588
We report upon a recently developed long range inductive power transfer system (IPT) designed to power remote sensors with mW level power consumption at distances up to 7 m. In this paper an inductive link is established between a large planar (1 × 1 m) transmit coil (Tx) and a small planer (170 × 170 mm) receiver coil (Rx), demonstrating the viability of highly asymmetrical coil configurations that real-world applications such as sensor networks impose. High Q factor Tx and Rx coils required for viable power transfer efficiencies over such distances are measured using a resonant method. The applicability of the Class-E amplifier in very low magnetic coupling scenarios and at the high frequencies of operation required for high Q operation is demonstrated by its usage as the Tx coil driver.
Hu F, Lucyszyn S, 2014, Noise Analysis for Multi-channel 'THz Torch' Thermal Infrared Wireless Communications Systems, 3rd Asia-Pacific Microwave Conference Proceedings (APMC), Publisher: IEEE, Pages: 1276-1278
Otter WJ, Hu F, Lucyszyn S, 2014, Scalable metal mesh filters for low cost THz applications, International Conference on Semiconductor Mid-IR Materials and Optics (SMMO2014)
Otter WJ, Hu F, Hazell J, et al., 2014, From mm-wave to THz: scalable filter design for ultra-low cost applications, ARMMS RF & Microwave Society Conference
D'Auria M, Sunday A, Hazell J, et al., 2014, Enabling technology for ultralow-cost RF MEMS switches on LTCC, ARMMS RF & Microwave Society Conference
Otter WJ, Hanham SM, Ridler N, et al., 2014, MM-wave photonic crystal technology, IET Colloquium on Millimetre-wave and Terahertz Engineering & Technology
Klein N, Hanham SM, Basey-Fisher TH, et al., 2014, Micro- and millimetre wave measurements of nanolitre biological liquids by dielectric resonators, IEEE MTT-S International Microwave Workshop Series on: RF and Wireless Technologies for Biomedical and Healthcare Applications (IMWS-Bio 2014), Publisher: IEEE
Hu F, Liang X, Lucyszyn S, 2014, Multi-channel Thermal Infrared Communications using Engineered Blackbody Radiation for Security Applications, Conference on Optics and Photonics for Counterterrorism, Crime Fighting, and Defence X and Optical Materials and Biomaterials in Security and Defence Systems Technology XI, Publisher: SPIE-INT SOC OPTICAL ENGINEERING, ISSN: 0277-786X
Liang X, Hu F, Yan Y, et al., 2014, Link Budget Analysis for Secure Thermal Infrared Communications using Engineered Blackbody Radiation, 29th URSI General Assembly and Scientific Symposium (URSI GASS), Publisher: IEEE
Otter WJ, Hanham SM, Klein N, et al., 2014, W-band Laser-controlled Photonic Crystal Variable Attenuator, IEEE MTT-S International Microwave Symposium (IMS), Publisher: IEEE, ISSN: 0149-645X
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- Citations: 2
Hu F, Otter WJ, Lucyszyn S, 2013, THz metal mesh filters on thick fused silica substrate, International Conference on THz and Mid Infrared Radiation and Applications to Cancer Detection using Laser Imaging, Workgroup Meetings of COST ACTIONs MP1204 and BM1205
Pinuela M, Mitcheson PD, Lucyszyn S, 2013, Ambient RF energy harvesting in urban and semi-urban environments, Transactions on Microwave Theory and Techniques, Vol: 61, Pages: 2715-2726, ISSN: 0018-9480
Pinuela M, Yates DC, Lucyszyn S, et al., 2013, Maximizing DC-to-Load Efficiency for Inductive Power Transfer, IEEE Transactions on Power Electronics, Vol: 28, Pages: 2437-2447, ISSN: 0885-8993
Inductive Power Transfer (IPT) systems for transmitting tens to hundreds of watts have been reported for almost a decade. Most of the work has concentrated on the optimization of the link efficiency and have not taken into account the efficiency of the driver. Class-E amplifiers have been identified as ideal drivers for IPT applications, but their power handling capabilityat tens of MHz has been a crucial limiting factor, since the load and inductor characteristics are set by the requirements of the resonant inductive system. The frequency limitation of the driver restricts the unloaded Q factor of the coils and thus the link efficiency. With a suitable driver, copper coilunloaded Q factors of over 1,000 can be achieved in the low MHz region, enabling a cost-effective high Q coil assembly. The system presented in this paper alleviates the use of heavy andexpensive field-shaping techniques by presenting an efficient IPT system capable of transmitting energy with a dc-to-load efficiency above 77% at 6 MHz across a distance of 30 cm. To the authorsknowledge this is the highest dc-to-load efficiency achieved for an IPT system without introducing restrictive coupling factor enhancement techniques.
Lucyszyn S, Pranonsatit S, 2013, RF MEMS for antenna applications, European Conference on Antennas and Propagation (EUCAP 2013), Pages: 1988-1992
Pinuela M, Yates DC, Mitcheson PD, et al., 2013, London RF Survey for Radiative Ambient RF Energy Harvesters and Efficient DC-load Inductive Power Transfer, 7th EurAAP European Conference on Antennas and Propagation (EUCAP 2013), Pages: 2839-2843
Huang X, Lucyszyn S, 2013, Silicon RFIC UWB bandpass filter using bulk-micromachined trench couplers, IEEE International Wireless Symposium (IWS2013), Publisher: Institute of Electrical and Electronic Engineers
Hu F, Lucyszyn S, 2013, Improved ‘THz torch’ technology for short-range wireless data transfer, IEEE International Wireless Symposium (IWS2013), Publisher: Institute of Electrical and Electronic Engineers
Lucyszyn S, Hu F, 2013, THz torch technology for low-cost security applications, NATO Conference 2013 on THz and Security Applications
Klein N, Shaforost O, Wang K, et al., 2013, Microwave-to-terahertz investigation of CVD graphene: towards sensor and communication applications, 39th International Conference on Micro and Nano Engineering (MNE 2013), Pages: 223-223
Otter WJ, Hanham SM, Ridler N, et al., 2013, Sub-THz photonic crystal devices, International Conference on THz and Mid Infrared Radiation and Applications to Cancer Detection using Laser Imaging, Workgroup Meetings of COST ACTIONs MP1204 and BM1205
Papantonis S, Ridler NM, Lucyszyn S, 2013, A new technique for vector network analyzer calibration verification using a single reconfigurable device, 82nd ARFTG Conference
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