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Title: Superluminal antenna

Abstract

A superluminal antenna element integrates a balun element to better impedance match an input cable or waveguide to a dielectric radiator element, thus preventing stray reflections and consequent undesirable radiation. For example, a dielectric housing material can be used that has a cutout area. A cable can extend into the cutout area. A triangular conductor can function as an impedance transition. An additional cylindrical element functions as a sleeve balun to better impedance match the radiator element to the cable.

Inventors:
; ; ; ; ;
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1348365
Patent Number(s):
9,608,330
Application Number:
13/368,200
Assignee:
Los Alamos National Laboratory LANL
DOE Contract Number:
AC52-06NA25396
Resource Type:
Patent
Resource Relation:
Patent File Date: 2012 Feb 07
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 36 MATERIALS SCIENCE

Citation Formats

Singleton, John, Earley, Lawrence M., Krawczyk, Frank L., Potter, James M., Romero, William P., and Wang, Zhi-Fu. Superluminal antenna. United States: N. p., 2017. Web.
Singleton, John, Earley, Lawrence M., Krawczyk, Frank L., Potter, James M., Romero, William P., & Wang, Zhi-Fu. Superluminal antenna. United States.
Singleton, John, Earley, Lawrence M., Krawczyk, Frank L., Potter, James M., Romero, William P., and Wang, Zhi-Fu. Tue . "Superluminal antenna". United States. doi:. https://www.osti.gov/servlets/purl/1348365.
@article{osti_1348365,
title = {Superluminal antenna},
author = {Singleton, John and Earley, Lawrence M. and Krawczyk, Frank L. and Potter, James M. and Romero, William P. and Wang, Zhi-Fu},
abstractNote = {A superluminal antenna element integrates a balun element to better impedance match an input cable or waveguide to a dielectric radiator element, thus preventing stray reflections and consequent undesirable radiation. For example, a dielectric housing material can be used that has a cutout area. A cable can extend into the cutout area. A triangular conductor can function as an impedance transition. An additional cylindrical element functions as a sleeve balun to better impedance match the radiator element to the cable.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Mar 28 00:00:00 EDT 2017},
month = {Tue Mar 28 00:00:00 EDT 2017}
}

Patent:

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  • A superluminal antenna element integrates a balun element to better impedance match an input cable or waveguide to a dielectric radiator element, thus preventing stray reflections and consequent undesirable radiation. For example, a dielectric housing material can be used that has a cutout area. A cable can extend into the cutout area. A triangular conductor can function as an impedance transition. An additional cylindrical element functions as a sleeve balun to better impedance match the radiator element to the cable.
  • An apparatus and method for a radiation source involving phase fronts emanating from an accelerated, oscillating polarization current whose distribution pattern moves superluminally (that is, faster than light in vacuo). Theoretical predictions and experimental measurements using an existing prototype superluminal source show that the phase fronts from such a source can be made to be very complex. Consequently, it will be very difficult for an aircraft imaged by such a radiation to detect where this radiation has come from. Moreover, the complexity of the phase fronts makes it almost impossible for electronics on an aircraft to synthesize a rogue reflection.more » A simple directional antenna and timing system should, on the other hand, be sufficient for the radar operators to locate the aircraft, given knowledge of their own source's speed and modulation pattern.« less
  • In the method, the radio frequency (rf) antenna is made by providing a clean coil made of copper tubing or other metal conductor, which is coated with a tacky organic binder, and then with a powdered glass frit, as by sprinkling the frit uniformly over the binder. The coil is then heated internally in an inert gas atmosphere, preferably by passing an electrical heating current along the coil. Initially, the coil is internally heated to about 200/sup 0/C to boil off the water from the binder, and then to about 750 to 850/sup 0/C to melt the glass frit, whilemore » also burning off the organic binder. The melted frit forms a molten glass coating on the metal coil, which is then cooled to solidify the glass, so that the metal coil is covered with a thin continuous homogeneous impervious glass coating of substantially uniform thickness. The glass coating affords complete electrical insulation and complete dielectric protection for the metal coil of the rf antenna, to withstand voltage breakdown and to prevent sputtering, while also doubling the plasma generating efficiency of the rf antenna, when energized with RF power in the vacuum chamber of an ion source for a particle accelerator or the like. The glass frit preferably contains approximately 45% lead oxide.« less
  • An improved transverse electromagnetic (TEM) horn antenna comprises a resistive loading material on the exterior surfaces of the antenna plates. The resistive loading material attenuates or inhibits currents on the exterior surfaces of the TEM horn antenna. The exterior electromagnetic fields are of opposite polarity in comparison to the primary and desired interior electromagnetic field, thus inherently cause partial cancellation of the interior wave upon radiation or upon reception. Reducing the exterior fields increases the radiation efficiency of the antenna by reducing the cancellation of the primary interior field (supported by the interior surface currents). This increases the transmit gainmore » and receive sensitivity of the TEM horn antenna, as well as improving the transient (time-domain) response.« less
  • An antenna is described for subsurface use in investigating an earth formation traversed by a borehole, comprising: an antenna housing defining a generally cylindrical cavity therein and a slot, the housing being selectively positionable against the wall of the borehole, and the slot being elongate in a direction defined by a plane perpendicular to the borehole when the housing is positionable against the borehole wall; an inductive element positioned within the cavity and adjacent the slot having first and second ends, the first end being grounded to the housing; a resonator means interconnected to the second end of the inductivemore » element for forming an electrically resonating circuit with the inductive element, the cavity, and the slot at a preselected frequency; and an insulator plug fluid sealingly disposed and moveable with the slot for providing pressure balancing between the cavity and the borehole.« less