Results 341 to 350 of about 7,981,538 (380)

Radiation Pattern of Parabolic Reflector

IETE Technical Review, 1999
Radiation pattern of parabolic reflector can be computed using various numerical methods. Moment method is convenient for small objects in terms of wavelength. When the dimension of the radiating objects are large compared to wavelength, high frequency asymptotic techniques like GTD (Geometrical Theory of Diffraction) gives very accurate results in ...
K Saroja, S Sanyal
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Radiation Pattern Optimization for QFN Packages With On-Chip Antennas at 160 GHz

IEEE Transactions on Antennas and Propagation, 2018
On-chip antennas are frequently used as radiating elements for monolithic microwave integrated circuits (MMICs) operating above 100 GHz. Their radiation pattern is wide since the radiator extension is typically about half wavelength.
Martin Hitzler, L. Boehm, W. Mayer, C. Waldschmidt   +3 more
semanticscholar   +1 more source

Nonreciprocal Radiation Pattern Metasurface Transformer

2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, 2019
This paper presents the concept of nonreciprocal radiation pattern metasurface transformer. The metasurface is placed on top of a source antenna, transforms the radiation pattern of the source antenna, introducing different radiation patterns for transmit and receive states.
Reza Karimian, Sajjad Taravati, Shahrokh Ahmadi, Mona Zaghloul   +3 more
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Near-field radiation patterns

1981
the radiation patterns considered were at distances from the aperture sufficiently large that all ray paths from the aperture to the field point are essentially parallel, i.e. r>a,b in Fig. 3.1 Here this assumption is removed and the radiation field in what is known in optics as the Fresnel zone of the aperture is examined.
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Waveforms and Radiation Patterns

1984
In numerous technical applications, as well as some theoretical considerations, an enticing problem is encountered. In its most practical (and real) form the problem may be that of designing a radar (or sonar) transmitter waveform with a given spectrum such that its peak factor is a minimum.
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Scanning synthetic radiation pattern antennas

Radioelectronics and Communications Systems, 2010
It is proposed conception of development of new type transmitting-receiving scanning antennas, which are called antennas with synthetic radiation pattern. It is based on application of movement of radiating (receiving) element together with synthesizing of radiation pattern (RP) by means of SAR for processing of recorded information about radiated and ...
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Simulation of antenna radiation pattern

Microwave and Optical Technology Letters, 1995
AbstractAdequately modeling the radiation pattern of a high‐performance antenna system usually requires the expensive development of complicated electromagnetic software or the storage of an extremely large number of measured data. An alternative and efficient simulation technique is described in this article using a spherical wave expansion model ...
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Riemann zeros in radiation patterns

Journal of Physics A: Mathematical and Theoretical, 2012
Propagation into the far field changes initial waves into their Fourier transforms. This implies that the Riemann zeros could be observed experimentally in the radiation pattern generated by an initial wave whose Fourier transform is proportional to the Riemann zeta function on the critical line. Two such waves are examined, generating the Riemann ?(t)
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Wideband and High-Gain Corporate-Fed Gap Waveguide Slot Array Antenna With ETSI Class II Radiation Pattern in $V$ -Band

IEEE Transactions on Antennas and Propagation, 2017
A. Vosoogh, P. Kildal, V. Vassilev
semanticscholar   +1 more source

Low-Profile Planar Filtering Dipole Antenna With Omnidirectional Radiation Pattern

IEEE Transactions on Antennas and Propagation, 2018
Yao Zhang, Xiu Yin Zhang, Y. Pan
semanticscholar   +1 more source