Results 251 to 260 of about 98,816 (301)
Some of the next articles are maybe not open access.
Physics Today, 1950
Electromagnetic radiation, an inexhaustable natural resource, plays an extremely important part in modern technology and living. We use very short wavelength radiation, that is, x-rays, in searching for otherwise hidden defects. We use longer wavelength radiation, that is, light, to see by. We can take photographs with infrared radiation.
openaire +1 more source
Electromagnetic radiation, an inexhaustable natural resource, plays an extremely important part in modern technology and living. We use very short wavelength radiation, that is, x-rays, in searching for otherwise hidden defects. We use longer wavelength radiation, that is, light, to see by. We can take photographs with infrared radiation.
openaire +1 more source
Josephson millimeter wave oscillators
International Journal of Infrared and Millimeter Waves, 1990This paper presents the state-of-the-art of a new class of microwave and mm-wave sources and intends to focus the attention of the microwave community on the new possibilities offered by them. Following a short introduction to the superconducting phenomena, the basic properties of Josephson tunnel junctions are presented.
openaire +2 more sources
Millimeter-Wave Integrated Circuits
Topical Meeting on Picosecond Electronics and Optoelectronics, 1987The opportunities offered by monolithic millimeter-wave technology span radar, communications, electronic warfare, and missile seekers. These opportunities relate to size, weight, and cost reduction advantages over standard metal waveguide and hybrid integrated circuit implementations.
openaire +1 more source
Proceedings of the 19th ACM Workshop on Hot Topics in Networks, 2020
Backscatter networks (such as RFID, and WiFi backscatter) are very attractive for IoT applications due to their ultra-low energy consumption. In fact, their required energy to operate is low enough that it can be harvested from the environment without having a battery. However, existing backscatter networks offer very limited data-rates (i.e.
Mohammad Hossein Mazaheri +2 more
openaire +1 more source
Backscatter networks (such as RFID, and WiFi backscatter) are very attractive for IoT applications due to their ultra-low energy consumption. In fact, their required energy to operate is low enough that it can be harvested from the environment without having a battery. However, existing backscatter networks offer very limited data-rates (i.e.
Mohammad Hossein Mazaheri +2 more
openaire +1 more source
Proceedings of the IEEE, 1962
The characteristics of a number of different kinds of masers are reviewed to estimate their usefulness in the region between one and a tenth millimeter. An estimate of the maximum power output for these systems is made and compared with the output to be expected from mixing two optical signals in a nonlinear dielectric and on a photocathode ...
openaire +1 more source
The characteristics of a number of different kinds of masers are reviewed to estimate their usefulness in the region between one and a tenth millimeter. An estimate of the maximum power output for these systems is made and compared with the output to be expected from mixing two optical signals in a nonlinear dielectric and on a photocathode ...
openaire +1 more source
1988
Abstract : The properties of two types of antennas suitable for operation at millimeter wave frequencies (100 to 300 GHz) have been investigated both theoretically and experimentally. The type of radiators considered were printed- circuit or microstrip antennas and dielectric resonator antennas. Special emphasis was placed on the problem of integrating
David R. Jackson, Stuart A. Long
openaire +1 more source
Abstract : The properties of two types of antennas suitable for operation at millimeter wave frequencies (100 to 300 GHz) have been investigated both theoretically and experimentally. The type of radiators considered were printed- circuit or microstrip antennas and dielectric resonator antennas. Special emphasis was placed on the problem of integrating
David R. Jackson, Stuart A. Long
openaire +1 more source
SPIE Proceedings, 2002
This paper describes a reflectometer, which can operate at either 35 or 94 GHz. A broadband signal is produced by a modulated noise source in either vertical or horizontal polarization. After reflection by the sample under test a super-heterodyne receiver detects this signal.
Roger Appleby +1 more
openaire +1 more source
This paper describes a reflectometer, which can operate at either 35 or 94 GHz. A broadband signal is produced by a modulated noise source in either vertical or horizontal polarization. After reflection by the sample under test a super-heterodyne receiver detects this signal.
Roger Appleby +1 more
openaire +1 more source
1992 IEEE Microwave Symposium Digest MTT-S, 2003
The authors reviewed the state of the art in millimeter-wave packaging and analyzed its potentials and limitations. Based on the analysis of the requirements and technology development, the following trends can be expected for millimeter-wave packages: (1) packaging at higher levels of integration-the advent of millimeter-wave multichip packages; (2 ...
H.J. Kuno, T.A. Midford
openaire +1 more source
The authors reviewed the state of the art in millimeter-wave packaging and analyzed its potentials and limitations. Based on the analysis of the requirements and technology development, the following trends can be expected for millimeter-wave packages: (1) packaging at higher levels of integration-the advent of millimeter-wave multichip packages; (2 ...
H.J. Kuno, T.A. Midford
openaire +1 more source
1962
Abstract : Transmission systems for use in the submillimeter wavelength region were studied. An extension of the theoretical analysis of trough waveguide is given. The computed launching efficiencies using magnetic line source excitation are presented in normalized form.
J. C. Wiltse +3 more
openaire +1 more source
Abstract : Transmission systems for use in the submillimeter wavelength region were studied. An extension of the theoretical analysis of trough waveguide is given. The computed launching efficiencies using magnetic line source excitation are presented in normalized form.
J. C. Wiltse +3 more
openaire +1 more source
Proceedings of the IEEE, 1966
Millimeter wave antennas are primarily parabolic reflectors, Cassegrain systems, and lenses. Comparative merits and the few design features peculiar to millimeter waves are discussed. Some of these antennas have larger gain and much larger gain per unit cost than any other microwave antennas.
openaire +1 more source
Millimeter wave antennas are primarily parabolic reflectors, Cassegrain systems, and lenses. Comparative merits and the few design features peculiar to millimeter waves are discussed. Some of these antennas have larger gain and much larger gain per unit cost than any other microwave antennas.
openaire +1 more source