Results 11 to 20 of about 236,819 (143)
Multi-functional microwave photonic radar system for simultaneous distance and velocity measurement and high-resolution microwave imaging [PDF]
, 2021 A photonic-assisted multi-functional radar system for simultaneous distance and velocity measurement and high-resolution microwave imaging is proposed and experimentally demonstrated by using a composite transmitted microwave signal of a single-chirped linearly frequency-modulated (LFM) signal and a single-tone microwave signal.
arxiv +1 more source
Demonstration of highly-sensitive wideband microwave sensing using ensemble nitrogen-vacancy centers [PDF]
Appl. Phys. Lett. 123, 214002 (2023), 2023 Microwave magnetometry is essential for the advancement of microwave technologies. We demonstrate a broadband microwave sensing protocol using the AC Zeeman effect with ensemble nitrogen-vacancy (NV) centers in diamond. A widefield microscope can visualize the frequency characteristics of the microwave resonator and the spatial distribution of off ...
arxiv +1 more source
IEEE Signal Processing Magazine, 2010 We aim to present a tutorial on the detection, parameter estimation and statistical analysis of compact sources (far galaxies, galaxy clusters and Galactic dense emission regions) in cosmic microwave background observations. The topic is of great relevance for current and future cosmic microwave background missions because the presence of compact ...
Herranz, D., Vielva, Patricio
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Atomic resolution imaging at 2.5 GHz using near-field microwave microscopy [PDF]
Appl.Phys.Lett. 97, 183111 (2010), 2010 Atomic resolution imaging is demonstrated using a hybrid scanning tunneling/near-field microwave microscope (microwave-STM). The microwave channels of the microscope correspond to the resonant frequency and quality factor of a coaxial microwave resonator, which is built in to the STM scan head and coupled to the probe tip.
arxiv +1 more source
Microwave Imaging and Emerging Applications [PDF]
International Journal of Biomedical Imaging, 2012 Active microwave imaging for biomedical has been proposed, studied, and implemented to varying degrees by a plethora of worldwide institutions for the last 30 years. Much of the interest has been based on the fact that tissue dielectric properties embody important information about physiological state and function.
openaire +3 more sources
The First Airborne Experiment of Sparse Microwave Imaging: Prototype System Design and Result Analysis [PDF]
arXiv, 2021 In this paper we report the first airborne experiments of sparse microwave imaging, conducted in September 2013 and May 2014, using our prototype sparse microwave imaging radar system. This is the first reported imaging radar system and airborne experiment that specially designed for sparse microwave imaging. Sparse microwave imaging is a novel concept
arxiv
Widefield Microwave Imaging in Alkali Vapor Cells with sub-100 um Resolution [PDF]
New J. Phys. 17 (2015) 112002, 2015 We report on widefield microwave vector field imaging with sub um resolution using a microfabricated alkali vapor cell. The setup can additionally image dc magnetic fields, and can be configured to image microwave electric fields. Our camera-based widefield imaging system records 2D images with a 6x6 mm2 field of view at a rate of 10 Hz. It provides up
arxiv +1 more source
A Comprehensive Review of Microwave Imaging for Brain Tumour Detection [PDF]
arXiv, 2023 Antennas are known to radiate and absorb radiation. We can use this property of antennas in microwave imaging. In microwave imaging the dielectric of the surrounding objects is considered. The S11 parameters are studied. These parameters are different for cells with tumor and without.
arxiv
Microwave device characterisation using a widefield diamond microscope [PDF]
Phys. Rev. Applied 10, 044039 (2018), 2018 Devices relying on microwave circuitry form a cornerstone of many classical and emerging quantum technologies. A capability to provide in-situ, noninvasive and direct imaging of the microwave fields above such devices would be a powerful tool for their function and failure analysis.
arxiv +1 more source
Near-Field Scanning Microwave Microscopy: Measuring Local Microwave Properties and Electric Field Distributions [PDF]
IEEE MTT-S Int. Microwave Symp. Digest, p. 965 (1998), 1998 We describe the near-field microwave microscopy of microwave devices on a length scale much smaller than the wavelength used for imaging. Our microscope can be operated in two possible configurations, allowing a quantitative study of either material properties or local electric fields.
arxiv +1 more source