Novel High-Q Resonant Structures for Space and Telecommunications. High-Q microwave resonators with low spurious mode density have important applications in telecommunications, radar, navigation, precision metrology and time standards. We will develop high-Q resonators by constructing a dielectric Bragg resonators using monocrystalline sapphire loaded in a copper cavity with new cylindrical and spherical geometries. Based on these devices, compact and economical state-of-the-art ultra-low noise ....Novel High-Q Resonant Structures for Space and Telecommunications. High-Q microwave resonators with low spurious mode density have important applications in telecommunications, radar, navigation, precision metrology and time standards. We will develop high-Q resonators by constructing a dielectric Bragg resonators using monocrystalline sapphire loaded in a copper cavity with new cylindrical and spherical geometries. Based on these devices, compact and economical state-of-the-art ultra-low noise microwave oscillators and hydrogen masers will be built for the telecommunications market and space applications.Read moreRead less
High Performance Microwave Oscillators for Radars, Comminication Systems and Precision Noise Measurements. The aim of the project is to develop a new class of microwave oscillators with unique combination of properties including low-noise, high frequency stability and reduced sensitivity to vibration. Such oscillators are essential for expanding fields of radar, fiber optics, optical frequency synthesis and metrology.
The industrial partner's focus will be on demands for reduced cost and impro ....High Performance Microwave Oscillators for Radars, Comminication Systems and Precision Noise Measurements. The aim of the project is to develop a new class of microwave oscillators with unique combination of properties including low-noise, high frequency stability and reduced sensitivity to vibration. Such oscillators are essential for expanding fields of radar, fiber optics, optical frequency synthesis and metrology.
The industrial partner's focus will be on demands for reduced cost and improved environmental performance, the university team will focus on improved frequency stability, optimal tuning and novel vibration immunity techniques.
Achieving the project goals will broaden the international markets for the industry partner's products and lead to increased export income for Australia.
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Application of ultra-high stability cryogenic sapphire oscillators to Very Long Baseline Interferometry. This project will develop a state-of-the-art commercial prototype of the cryogenic sapphire oscillator (CSO) optimised for use at remote sites. Proof of operation will be applied to the important niche market of Very-Long Baseline Interferometry (VLBI) radio astronomy, with improvements in image quality. The research will also significantly benefit the Australian bid for the SKA project, as ....Application of ultra-high stability cryogenic sapphire oscillators to Very Long Baseline Interferometry. This project will develop a state-of-the-art commercial prototype of the cryogenic sapphire oscillator (CSO) optimised for use at remote sites. Proof of operation will be applied to the important niche market of Very-Long Baseline Interferometry (VLBI) radio astronomy, with improvements in image quality. The research will also significantly benefit the Australian bid for the SKA project, as the CSO is the only technology capable of synchronising the outputs of the telescopes arrays to the required signal to noise to attain the required image quality. The project will further Australia's status in radio astronomy as a world leader and add to our exports of precision scientific instruments.Read moreRead less
Application of Femtosecond Light Sources to Generation of Low Noise Microwave Signals. The main goal of the research project is to develop prototypes of photonic oscillators capable of generating spectrally pure signals both at optical and microwave frequencies. The project is also aimed at understanding noise mechanisms affecting frequency stability of classical microwave oscillators based on sapphire loaded cavity resonators. By cryogenically cooling such resonators we plan to create a new fam ....Application of Femtosecond Light Sources to Generation of Low Noise Microwave Signals. The main goal of the research project is to develop prototypes of photonic oscillators capable of generating spectrally pure signals both at optical and microwave frequencies. The project is also aimed at understanding noise mechanisms affecting frequency stability of classical microwave oscillators based on sapphire loaded cavity resonators. By cryogenically cooling such resonators we plan to create a new family of extremely low noise and economically viable microwave signal sources. The research proposed will enrich the field of oscillator frequency control, give rise to new techniques for precision noise measurements and reinforce Australia's position at the forefront of microwave and photonic science.Read moreRead less
Micro-engineered Optical Fibre Clocks. Clocks and oscillators are crucial components of all communication, navigation and computing technologies. Improvements in the performance of these internal clocks results in improvement in the performance of the dependent system, and are thus of high economic and technological value. A great need presently exists for compact and high performance clocks for improving optical fibre communication systems. The goal of this project is join the expertise of t ....Micro-engineered Optical Fibre Clocks. Clocks and oscillators are crucial components of all communication, navigation and computing technologies. Improvements in the performance of these internal clocks results in improvement in the performance of the dependent system, and are thus of high economic and technological value. A great need presently exists for compact and high performance clocks for improving optical fibre communication systems. The goal of this project is join the expertise of the University of Western Australia group with that of the University of Bath team to develop a new type of clock to fulfil this need.Read moreRead less
Imaging of properties of coherent elastic light scattering from turbid biological media. Imaging with coherent, elastically-scattered light for visualisation of thick-tissue morphology in vivo, or of cells buried deep in a turbid medium, remains a major challenge. We adopt an alternative approach of imaging of properties of light scattering based on regarding cellular tissue as a spatially-varying refractive-index continuum which encodes scattered light. We propose new methodologies to infer t ....Imaging of properties of coherent elastic light scattering from turbid biological media. Imaging with coherent, elastically-scattered light for visualisation of thick-tissue morphology in vivo, or of cells buried deep in a turbid medium, remains a major challenge. We adopt an alternative approach of imaging of properties of light scattering based on regarding cellular tissue as a spatially-varying refractive-index continuum which encodes scattered light. We propose new methodologies to infer tissue state and morphology indirectly based on phase delay, speckle, and angle-resolved scattering. We will break new ground in correlating the structure and function of in situ epithelial tissue and cells to light scattering enabling, e.g., the detection of mitosis and apoptosis in cells buried in thick, turbid media, and of cancers and precancers in vivo.Read moreRead less
Advances in optical coherence tomography. We propose to continue our research into the biomedical imaging technique of optical coherence tomography by making substantial new advances in the key areas of ultra-broad bandwidth operation, coincident confocal gate scanning, and dispersion compensation. These advances are aimed at improving resolution to the 1-5 micron range, which should allow a breakthrough to sub-cellular in vivo imaging, making visible sample histology in situ, which is currentl ....Advances in optical coherence tomography. We propose to continue our research into the biomedical imaging technique of optical coherence tomography by making substantial new advances in the key areas of ultra-broad bandwidth operation, coincident confocal gate scanning, and dispersion compensation. These advances are aimed at improving resolution to the 1-5 micron range, which should allow a breakthrough to sub-cellular in vivo imaging, making visible sample histology in situ, which is currently not possible. We also plan to make advances in the key area of scanning delay line technology by employing acousto-optics in OCT for the first time. Acousto-optics conveys advantages in no-moving-parts, scan-speed and accuracy.Read moreRead less
Nanometric optical sensing for characterisation of microbioreactors. Microfabrication of microfluidic based microbioreactors is a novel technology that is creating advanced tools in the fields of biology and medicine. A critically important step in the development of a microbioreactor is the ability to characterise fluid shear stress of the microenvironment without impacting on the biological system. The development of a microbioreactor in which individual or multiple cells can be cultured and ....Nanometric optical sensing for characterisation of microbioreactors. Microfabrication of microfluidic based microbioreactors is a novel technology that is creating advanced tools in the fields of biology and medicine. A critically important step in the development of a microbioreactor is the ability to characterise fluid shear stress of the microenvironment without impacting on the biological system. The development of a microbioreactor in which individual or multiple cells can be cultured and manipulated will have a significant impact on study of biological systems in cancer research and stem cell research. Read moreRead less
Airborne passive radiometer for high resolution soil moisture monitoring. The project proposes to create a novel technology to measure soil moisture. Accurate knowledge of soil moisture profiles at high resolution is important for sustainable land and water management including efficient irrigation scheduling and cropping practices. A passive multi-band soil moisture-measuring radiometer at L-, Ku- and Ka-bands is proposed. The radiometer comprises a three-band shared aperture antenna array, a ....Airborne passive radiometer for high resolution soil moisture monitoring. The project proposes to create a novel technology to measure soil moisture. Accurate knowledge of soil moisture profiles at high resolution is important for sustainable land and water management including efficient irrigation scheduling and cropping practices. A passive multi-band soil moisture-measuring radiometer at L-, Ku- and Ka-bands is proposed. The radiometer comprises a three-band shared aperture antenna array, a receiving electronics, a digital controller and a data logger. The array antenna comprises dual polarised stacked patch elements. Beamforming networks form agile beams to scan the ground. Sensitive radiometer receivers apply brightness temperature downscaling for high resolution. The high-resolution passive radiometer would revolutionise airborne soil moisture monitoring by removing the mechanically steerable bulky and heavy scanheads.Read moreRead less
Reconfigurable antennas for satellite on-the-move communications. Reconfigurable antennas for satellite on-the-move communications. This project aims to design and develop low-cost reconfigurable end-user antennas that could be integrated with low-earth-orbit satellites so regional and remote Australians can access broadband. While broadband is taking its place alongside water and electricity as essential infrastructure, people in regional Australia lack genuine broadband services. These antenna ....Reconfigurable antennas for satellite on-the-move communications. Reconfigurable antennas for satellite on-the-move communications. This project aims to design and develop low-cost reconfigurable end-user antennas that could be integrated with low-earth-orbit satellites so regional and remote Australians can access broadband. While broadband is taking its place alongside water and electricity as essential infrastructure, people in regional Australia lack genuine broadband services. These antennas are expected to give these communities reliable access to e-health services and distance education, and make their businesses more productive with access to new markets. The proposed antennas should also make broadband services available in the air, at sea, or on the move.Read moreRead less