Asymmetry of an electrical field meter with an active dipole antenna

1991 ◽  
Vol 34 (2) ◽  
pp. 201-203
Author(s):  
V. I. Tokatly ◽  
V. A. Tishchenko
Keyword(s):  
Dipole Antenna ◽  
Electrical Field ◽  
Active Dipole

scholarly journals The influence of electromagnetic singularities on an active dipole antenna within a cavity

2003 ◽  
Vol 1 ◽  
pp. 57-61 ◽  
Author(s):  
F. Gronwald
Keyword(s):  
Quality Factor ◽  
Method Of Moments ◽  
Current Distribution ◽  
Dipole Antenna ◽  
Rectangular Cavity ◽  
Cavity Resonance ◽  
Cavity Resonances ◽  
Small Antenna ◽  
Active Dipole ◽  
Electromagnetic Source

Abstract. We study the influence of both the electromagnetic source singularity and electromagnetic cavity resonances on the current distribution of a dipole antenna within a rectangular cavity. These two types of electromagnetic singularities are triggered by the radius of the dipole antenna and the quality factor of the enclosing cavity, respectively. The key element of our investigation is a novel representation of the electromagnetic Green’s function for a lossy rectangular cavity. It allows to directly obtain the current distribution on the antenna by means of the method of moments. As a result it is recognized that a dominating source singularity, i.e., a small antenna radius, can inhibit resonating effects, even if a cavity resonance is excited and the quality factor of the cavity is high.

Parametric Performances of a Petahertz Band Nano-Patch Dipole Antenna on Electrical Field Distribution for Energy Harvesting

2015 ◽  
Vol 781 ◽  
pp. 454-457
Author(s):  
Mazlina Esa ◽  
Mohd. Khairul Hisham Ismail ◽  
Noor Asniza Murad ◽  
Nik Noordini Nik Abd. Malik ◽  
Mohd Fairus Mohd Yusoff ◽  
...  
Keyword(s):  
Patch Antenna ◽  
Dielectric Material ◽  
Dipole Antenna ◽  
Resonance Peak ◽  
Electrical Field ◽  
Peak Response ◽  
Metal Thickness ◽  
Infra Red ◽  
The Relationship ◽  
Typical Design

There is an important need to investigate the enhancement of electrical field in visible and near infra-red region for a nanopatch antenna. This paper presents the relationship between metal thicknesses and electrical field with dedicated amount of dielectric material by using a typical design concept of a patch antenna. Two metal thicknesses have been considered, the radiating patch and ground layer. It was found that the decrement of electrical field can be clearly observed through parametric investigation of the metal thickness. Additionally, the resonance peak response is similar to an electrical field which decreases with increasing metal thickness. It can be concluded that the change of an antenna parameter is capable to control two properties for a desired application.

CPW fed active dipole antenna for television receivers

1994 ◽  
Vol 30 (22) ◽  
pp. 1815-1816 ◽  
Author(s):  
M. Taguchi ◽  
T. Fujimoto ◽  
K. Tanaka
Keyword(s):  
Dipole Antenna ◽  
Active Dipole

Ku-band active dipole antenna

1994 ◽  
Vol 30 (19) ◽  
pp. 1560-1561 ◽  
Author(s):  
O.P. Lundén
Keyword(s):  
Dipole Antenna ◽  
Active Dipole ◽  
Ku Band

Principles of Low-Vacuum SEM

1992 ◽  
Vol 50 (2) ◽  
pp. 1304-1305
Author(s):  
Klaus-Ruediger Peters
Keyword(s):  
New Technologies ◽  
High Vacuum ◽  
Optical Microscope ◽  
Specimen Surface ◽  
Electrical Field ◽  
Gaseous Environment ◽  
New Information ◽  
Gas Molecules ◽  
New Interactions ◽  
Gas Pressures

Only recently it became possible to expand scanning electron microscopy to low vacuum and atmospheric pressure through the introduction of several new technologies. In principle, only the specimen is provided with a controlled gaseous environment while the optical microscope column is kept at high vacuum. In the specimen chamber, the gas can generate new interactions with i) the probe electrons, ii) the specimen surface, and iii) the specimen-specific signal electrons. The results of these interactions yield new information about specimen surfaces not accessible to conventional high vacuum SEM. Several microscope types are available differing from each other by the maximum available gas pressure and the types of signals which can be used for investigation of specimen properties.Electrical non-conductors can be easily imaged despite charge accumulations at and beneath their surface. At high gas pressures between 10-2 and 2 torr, gas molecules are ionized in the electrical field between the specimen surface and the surrounding microscope parts through signal electrons and, to a certain extent, probe electrons. The gas provides a stable ion flux for a surface charge equalization if sufficient gas ions are provided.

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