Grating Lobes
Suppression of grating lobes for MMW sparse array setups
... the grating lobes are not at the exact position in azimuth according to the used ...by grating lobes and main lobes in the two ...pictures, grating lobes are at dif- ...
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Application of Frequency Diversity to Suppress Grating Lobes in Coherent MIMO Radar with Separated Subapertures
... The grating lobe suppression e ff ect depends on such parameters as the frequency offset Δ f , the number of transmitted waveforms M, and the sparse distance ...of grating lobes, more transmitted ...
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A miniature HIFU excitation scheme to eliminate switching-induced grating lobes and nullify hard tissue attenuation
... induced grating lobes, however pressure variance remained ...the grating lobes and was able to to reduce pressure variance to a satisfactory ...
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Inequality Condition for Grating Lobes of Planar Phased Array
... dx < √ 3/3 = 0.57735, dy < 0.5 (26) Obviously, the element distance for no grating lobes of triangular lattice is larger than the rectangular lattice, which mainly lies in dx. Let u = cos ϕ 0 and v = ...
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Dual-Beam Array Antenna Based on Circular Patch Elements with Conical Beam Pattern
... proposed. But the two beams are not of equal levels and show a gain difference of 1.98 dB. Difference- beam patterns are always obtained by using two sub-arrays excited out of phase. It is noted that the beam-pointing ...
7
Design of Ultrathin Absorptive/Transmissive Radome with Dual Passbands
... Abstract—An ultrathin absorptive/transmissive radome with dual passbands is presented in this paper. The total thickness of radome is only 5 mm. The dual passbands are located at around 1.05 GHz and 2.2 GHz, ...
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Design of a UWB Combined Antenna and an Array of Miniaturized Elements with and Without Lens
... prevent grating lobes in the array radiation ...the grating lobes are about 13 dB and 7 dB smaller than the main lobe in H-plane and E-plane, ...
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Application of conformal map theory for design of 2-D ultrasonic array structure for ndt imaging application : a feasibility study
... reduce grating lobes, as the rectangular grid layout becomes more ...of grating lobes in the case of a periodic array layout, when ...peak grating lobe energy smears quickly, reducing ...
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Design and Imaging of Ground-Based Multiple-Input Multiple-Output Synthetic Aperture Radar (MIMO SAR) with Non-Collinear Arrays
... high grating lobe problems in the azimuth dimension of non-collinear MIMO imaging radar systems in the near-field ...low grating lobes in the near-field area by adjusting the TEs’ position and adding ...
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Hemisphere Dielectric Resonator Pattern Reconfigurable Antenna and its Linear Phased Array
... of grating lobes and reducing the mutual coupling between adjacent elements, thinning array by non-uniform spacing is adopted to study the performance of the linear phased array with the proposed ...
10
Articles
... P. brevistyla, P. delavayi and P. leptophylla. As shown in Fig. 6, the variation of the depth of staminodes in the specimens collected from Baoji County, Heqing County and Baoxing County, where the types of P. ...
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Polarization sensitivity as a visual contrast enhancer in the Emperor dragonfly larva, Anax imperator
... square-wave grating more closely when it was viewed through the horizontally polarized light field, equivalent to a similar increase in tracking ability observed in response to an 8% increase in the intensity ...
7
Index Catalog // Carolina Digital Repository
... Since the evanescent waves do not propagate past the metamaterial, only a near-field image is formed at the far surface of the metallo-dielectric structure. The upper limit on thickness to allow transmission is limited ...
109
A comparative study of the performance of seven and 63 chip optical code division multiple access encoders and decoders based on superstructured fiber Bragg gratings
... Bragg grating (FBG) technology have been pro- posed and ...encoder–decoder grating array is varied so as to define individual chips within the code ...However, grating technology has progressed to ...
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Segmentation of Lung Lobes and Fissures for Surgical Pre Planning
... A curve-growing process, modeled by a Bayesian network, is described that is influenced by both the features of the ridge map and prior knowledge of the shape of the fissure [10]. The human lungs are composed of distinct ...
5
Modal expansion theories for singly periodic diffraction gratings
... spectral performance of the semi-circular groove grating, while the second is applied, not only to this grating, but also to the triangular and sinusoidal groove gratings.... I would lik[r] ...
10
Design & Analysis the Parameters of Strain based FBG Sensors using Optigrating
... The structure of the FBG can vary through the refractive index, or by grating period. The grating period can be uniform or graded, and either localized or distributed in a superstructure. The refractive ...
9
Cassini observations of ionospheric plasma in Saturn's magnetotail lobes
... Journal of Geophysical Research: Space Physics RESEARCH ARTICLE 10.1002/2015JA021648 Key Points: • Tailward observation of ionospheric plasma in the magnetotail lobe • Evidence for simul[r] ...
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Cassini observations of ionospheric plasma in Saturn's magnetotail lobes
... The panels show a solar wind plasma number density, b solar wind speed, c solar wind dynamic pressure, d the magnetic field strength in the solar wind.... FELICI ET AL.: IONOSPHERIC PLAS[r] ...
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Arrayed waveguide grating
... waveguide grating—PAWG, and waveguide grating router—WGR) have become increasingly popular as wavelength multiplexers/de-multiplexers (MUX/De-MUX) for dense wavelength division multiplexing ...
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