scholarly journals EXPERIMENTAL RESULTS ON A PLANAR ARRAY OF PARASITIC DIPOLES FED BY ONE ACTIVE ELEMENT

2011 ◽  
Vol 113 ◽  
pp. 369-377 ◽  
Author(s):  
Marcos Alvarez Folgueiras ◽  
Juan Antonio Rodríguez-Gonzalez ◽  
Francisco Jose Ares-Pena
Keyword(s):  
Active Element ◽  
Experimental Results ◽  
Planar Array

Experimental results for a prototype 3‐D acoustic imaging system using an ultra‐sparse planar array

2002 ◽  
Vol 112 (5) ◽  
pp. 2421-2421
Author(s):  
John M. Impagliazzo ◽  
Alice M. Chiang ◽  
Steven R. Broadstone
Keyword(s):  
Imaging System ◽  
Acoustic Imaging ◽  
Experimental Results ◽  
Planar Array

scholarly journals Array of Horns Fed by a Transverse Slotted Groove Gap Waveguide at 28 GHz

Sensors ◽  
2020 ◽  
Vol 20 (18) ◽  
pp. 5311
Author(s):  
Malcolm Ng Mou Kehn ◽  
Chih-Kai Hsieh ◽  
Eva Rajo-Iglesias
Keyword(s):  
Linear Array ◽  
Experimental Results ◽  
Manufacturing Costs ◽  
Waveguide Wall ◽  
Low Profile ◽  
Planar Array ◽  
5G Technologies

An array of low profile horns fed by transverse slots on a groove gap waveguide (GGWG) is presented. The GGWG is implemented with glide symmetrical holes and the design frequency is 28 GHz. The low profile horns are integrated in the same waveguide wall as the slots. The designed antenna is a linear array of these horns but the solution can be easily extended to a planar array. Experimental results support this work. The designed antenna is a good candidate for applications related to 5G technologies where medium to high gains as well as high efficiencies are required and reasonable manufacturing costs are demanded.

Measured characteristics of a planar array of parasitic elements fed by one active element

2015 ◽  
Vol 57 (12) ◽  
pp. 2807-2809
Author(s):  
Aaron A. Salas-Sánchez ◽  
Javier Fondevila-Gómez ◽  
Juan A. Rodríguez-González ◽  
Francisco J. Ares-Pena
Keyword(s):  
Active Element ◽  
Planar Array

scholarly journals Design and Experimental Evaluation of Quadrature Oscillator Employing Single FB–VDBA

2016 ◽  
Vol 67 (2) ◽  
pp. 137-142 ◽  
Author(s):  
Abdullah Yesil ◽  
Firat Kacar ◽  
Koray Gurkan
Keyword(s):  
Experimental Evaluation ◽  
Active Element ◽  
Current Drive ◽  
Experimental Results ◽  
High Current ◽  
Output Impedance ◽  
Quadrature Oscillator ◽  
Theoretical Assumptions ◽  
Circuit Structure ◽  
Buffer Amplifier

Abstract This paper presents an attractive and a new voltage-mode quadrature oscillator using a single Fully Balanced-Voltage Differencing Buffer Amplifier (FB-VDBA) as the active element. The circuit structure is very simple, consisting of merely one FB-VDBA, one resistor and two capacitors. The circuit is implemented using the commonly available OPA860 which results in low output impedance and high current drive capability. The proposed circuit also has a suitable architecture for IC production. Experimental results which are matched well with the theoretical assumptions are given.

Minimum Component All Pass Filters Using a New Versatile Active Element

2019 ◽  
Vol 29 (05) ◽  
pp. 2050078 ◽  
Author(s):  
Mohammad Faseehuddin ◽  
Jahariah Sampe ◽  
Sadia Shireen ◽  
Sawal Hamid Md Ali
Keyword(s):  
Integrated Circuits ◽  
Fourth Order ◽  
Active Element ◽  
Cmos Technology ◽  
Current Conveyor ◽  
Experimental Results ◽  
Pass Filter ◽  
Differential Input ◽  
Filter Structure ◽  
Transconductance Amplifier

In this paper, a new active element namely Dual-X current conveyor differential input transconductance amplifier (DXCCDITA) is proposed. The DXCCDITA is utilized in designing four minimum component fully cascadable all pass filter (APF) structures. The designed all pass filters require only single active element and one/two passive elements for realization thus making them a minimum component implementation. Two among the four presented all pass structures require only a single capacitor for implementation. A scheme for realizing nth order all pass filter is also suggested and a fourth order voltage mode (VM) filter is developed from the proposed scheme. The effect of non-idealities on the proposed all pass filters is also studied. A simple oscillator is also developed using one of the all pass filter structure. The oscillator required only one DXCCDITA, two capacitors and one resistor for implementation. The DXCCDITA is implemented in 0.35[Formula: see text][Formula: see text]m TSMC CMOS technology parameters and tested in Tanner EDA. Sufficient numbers of simulations are provided to establish the functionality of all pass structures. The experimental results using commercially available integrated circuits (ICs) are also provided.

Diagnostics of Gold Laser Plasmas

1988 ◽  
Vol 102 ◽  
pp. 357-360
Author(s):  
J.C. Gauthier ◽  
J.P. Geindre ◽  
P. Monier ◽  
C. Chenais-Popovics ◽  
N. Tragin ◽  
...  
Keyword(s):  
Experimental Results ◽  
Pure Gold ◽  
Electronic Temperature ◽  
X Ray ◽  
Laser Plasmas ◽  
Collisional Radiative Model ◽  
Radiative Model

AbstractIn order to achieve a nickel-like X ray laser scheme we need a tool to determine the parameters which characterise the high-Z plasma. The aim of this work is to study gold laser plasmas and to compare experimental results to a collisional-radiative model which describes nickel-like ions. The electronic temperature and density are measured by the emission of an aluminium tracer. They are compared to the predictions of the nickel-like model for pure gold. The results show that the density and temperature can be estimated in a pure gold plasma.

Observation of Phase Contrast Images in STEM and CTEM Modes by Using 100 kV Field Emission Electron Gun

1974 ◽  
Vol 32 ◽  
pp. 390-391
Author(s):  
Y. Harada ◽  
T. Goto ◽  
H. Koike ◽  
T. Someya
Keyword(s):  
Field Emission ◽  
Phase Contrast ◽  
Image Formation ◽  
Fresnel Diffraction ◽  
Experimental Results ◽  
Electron Gun ◽  
Scanning Microscopy ◽  
Emission Electron ◽  
Lattice Images

Since phase contrasts of STEM images, that is, Fresnel diffraction fringes or lattice images, manifest themselves in field emission scanning microscopy, the mechanism for image formation in the STEM mode has been investigated and compared with that in CTEM mode, resulting in the theory of reciprocity. It reveals that contrast in STEM images exhibits the same properties as contrast in CTEM images. However, it appears that the validity of the reciprocity theory, especially on the details of phase contrast, has not yet been fully proven by the experiments. In this work, we shall investigate the phase contrast images obtained in both the STEM and CTEM modes of a field emission microscope (100kV), and evaluate the validity of the reciprocity theory by comparing the experimental results.

A new dissociation mode for dislocations in silicon

1978 ◽  
Vol 36 (1) ◽  
pp. 346-347
Author(s):  
A. Ourmazd ◽  
G.R. Booker ◽  
C.J. Humphreys
Keyword(s):  
Detailed Examination ◽  
Experimental Results ◽  
Dislocation Network ◽  
Weak Beam ◽  
Phosphorus Doped

A (111) phosphorus-doped Si specimen, thinned to give a TEM foil of thickness ∼ 150nm, contained a dislocation network lying on the (111) plane. The dislocation lines were along the three <211> directions and their total Burgers vectors,ḇt, were of the type , each dislocation being of edge character. TEM examination under proper weak-beam conditions seemed initially to show the standard contrast behaviour for such dislocations, indicating some dislocation segments were undissociated (contrast A), while other segments were dissociated to give two Shockley partials separated by approximately 6nm (contrast B) . A more detailed examination, however, revealed that some segments exhibited a third and anomalous contrast behaviour (contrast C), interpreted here as being due to a new dissociation not previously reported. Experimental results obtained for a dislocation along [211] with for the six <220> type reflections using (g,5g) weak-beam conditions are summarised in the table below, together with the relevant values.

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