Results 41 to 50 of about 4,005,914 (318)
A millimetre wave, quasi-optical complex impedance bridge [PDF]
, 2015 This thesis describes the work undertaken in the design and construction of a millimetre wave, quasi-optical impedance bridge. The instrument operates as a nulling complex reflectometer, with nulling being implemented at the signal frequency by ...
Harvey, Andrew R.
core +2 more sources
Indoor Pico-Cellular Network Operation based on a Simple Optical Millimetre-Wave Generation Scheme [PDF]
, 2010 Experimental demonstrations of modulated signal transmission and pico-cellular network operation at millimeter-wave frequencies, which are based on a simple technique for millimeter-wave generation using an optical phase modulator and optical filtering ...
Jeanne James +14 more
core +1 more source
Maximising the utility of enterprise millimetre-wave networks [PDF]
Computer Communications, 2018 Millimetre-wave (mmWave) technology is a promising candidate for meeting the intensifying demand for ultra fast wireless connectivity, especially in high-end enterprise networks. Very narrow beam forming is mandatory to mitigate the severe attenuation specific to the extremely high frequency (EHF) bands exploited.
Nicolò Facchi +2 more
openaire +5 more sources
Design of high-performance millimeter wave and sub-millimeter wave quasi-optical isolators and circulators [PDF]
, 2007 Faraday rotators using permanently magnetized ferrite materials are used to make quasi-optical isolators and circulators at millimeter wave and sub-millimeter wave frequencies that have far higher performance than their waveguide equivalents.
Goy, P +7 more
core +2 more sources
IEEE Open Journal of Antennas and PropagationAn optically transparent single-layer dual-frequency dual-polarization metasurface operating at 28 GHz and 38 GHz is proposed to enhance millimeter-wave transmission through glass.
Wen Fu +6 more
doaj +1 more source
NUMERICAL SIMULATION OF STRESS WAVE PROPAGATION IN SAP CONCRETE [PDF]
Civil Engineering Journal, 2018 The SAP (Super Absorbent Polymers) concrete is a new kind of concrete materials with uniformly distributed spherical pores with diameter of millimetre-size.
Zhenqun Sang +4 more
doaj +1 more source
Millimetre-wave optics design & verification [PDF]
AIP Conference Proceedings, 2002 Microwave background astronomy requires very high performance millimetre-wave optical systems. However, compact quasi-optics are difficult to design with any confidence using techniques developed for visible wavelengths. In this paper we investigate the performance of existing software design tools (ASAP, CODE V, GLAD) as well as a Gaussian beam mode ...
O'Sullivan, Créidhe +8 more
openaire +2 more sources
Discussion on Reciprocity, Unitary Matrix, and Lossless Multiple Beam Forming Networks
International Journal of Antennas and Propagation, 2015 The Lorentz reciprocity theorem enables us to establish that the transmitting and receiving patterns of any antenna are identical, provided some hypotheses on this antenna and the surrounding medium are satisfied.
Nelson Jorge G. Fonseca
doaj +1 more source
Operation of kinetic-inductance travelling wave parametric amplifiers at millimetre wavelengths
Superconductors Science and TechnologyIt is expected that the operation of microwave kinetic inductance travelling wave parametric amplifiers (KITWPAs) can be extended to the millimetre (mm) and the sub-mm wavelength range as long as the frequency is below the gap frequency of the ...
Bo-On-Kok Tan +4 more
semanticscholar +1 more source
A novel 24 GHz circularly polarised metasurface rectenna
IET Microwaves, Antennas & Propagation, 2023 A novel 24 GHz circularly polarised metasurface rectenna for wireless power transmission is designed in this study. Based on experimental measurements and retro‐simulation, an effective approach is proposed to extract the parasitic parameters of a ...
Wei Huang +4 more
doaj +1 more source