Harris Corporation

Dennis Lee Tebbe

Francis Eugene Parsche

Thomas P Smyth

Terry Provo

Dara Ruggiero

William Johnson Chappell

Randy T Pike

Holly Todd

The multiple polarization loop antenna includes a circularly polarized loop antenna, which may utilize a loop electrical conductor and two signal feedpoints along the loop electrical conductor separated by one quarter of the length of the loop circumference for a signal feedpoint phase angle input difference of 90 degrees. Each of the signal feedpoints may include a loop discontinuity, so that at least one signal source coupled thereto provides circular polarization from the loop electrical conductor. The circularly polarized loop antenna provides an increase in gain and decrease in size relative to the dipole turnstile. It can provide two orthogonal polarizations from two isolated ports, and the polarizations may be dual linear or dual circular.

Multiple polarization loop antenna and associated methods

A loop antenna may include first and second electrical conductors arranged to define a circular shape with first and second spaced apart gaps therein. Opposing portions of the first and second electrical conductors at the first gap may define a signal feedpoint, and opposing portions of the first and second electrical conductors at the second gap may define an impedance tuning feature. The second gap may be circumferentially spaced from the first gap less than ninety degrees, and the second gap may be greater than the first gap to provide a predetermined impedance. A coaxial transmission line may form a feed inset into the loop conductor. The loop antenna may be planar and have a reduced size for ease of manufacture and use, and it may provide an isotropic radiating pattern at a predetermined operating frequency, which may avoid the need for antenna aiming.

Loop antenna including impedance tuning gap and associated methods

The antenna includes an electrically conductive antenna body having a polyhedral shape with opposing first and second ends and a medial portion therebetween. The medial portion of the electrically conductive antenna body is wider than the opposing first and second ends thereof, and the electrically conductive antenna body has a slot therein extending from at least adjacent the first end to at least adjacent the second end. The polyhedral antenna has an omnidirectional pattern, is horizontally polarized and broad in bandwidth above a lower cutoff frequency.

Polyhedral antenna and associated methods

The polarization-diverse antenna array includes three orthogonal loop antennas having a common center, e.g. together defining a sphere. Each loop antenna includes a loop electrical conductor. Two signal feedpoints are along the loop electrical conductor and separated by a fraction of a length of the loop electrical conductor. Each of the signal feedpoints includes a series signal feedpoint so that a polarization diversity controller coupled thereto may selectively provide vertical, horizontal, lefthand circular and righthand circular polarization for a single loop electrical conductor, including simultaneous (dual) polarizations. These signal feedpoints may supply signals with vertical, horizontal, lefthand circular and righthand circular polarization from each of the three orthogonal look-angles provided by the three loop electrical conductors. Thus the antenna array may provide a compact facility for using Diversity Combining to improve communications performance and/or Multiple-Input, Multiple-Output (MIMO) schemes that furthermore also increase capacity. The polarization-diverse antenna array provides a rigorous polarization and look angle approach for communications diversity.

Polarization-diverse antenna array and associated methods

Method for fabricating a textured dielectric substrate () for an RF circuit. The method can include the step () of selecting a plurality of dielectric substrate materials, each having a distinct combination or set of electrical properties that is different from the combination of electrical properties of every other one of dielectric substrate materials. Selecting a textured substrate patter () which is comprised of at least two types of distinct areas respectively having the distinct sets of electrical properties, with each distinct area dimensioned much smaller than a wavelength at a frequency of interest. Cutting the dielectric substrate materials () into a size and shape consistent with the distinct areas of the selected pattern so as to form a plurality of dielectric pieces (). Arranging the dielectric pieces on a base plate () in accordance with the selected pattern to form the textured dielectric substrate.

Method of fabricating an RF substrate with selected electrical properties

Method for fabricating a textured dielectric substrate () for an RF circuit. The method can include the step () of selecting a plurality of dielectric substrate materials, each having a distinct combination or set of electrical properties that is different from the combination of electrical properties of every other one of dielectric substrate materials. Selecting a textured substrate pattern () which is comprised of at least two types of distinct areas respectively having the distinct sets of electrical properties, with each distinct area dimensioned much smaller than a wavelength at a frequency of interest. Cutting the dielectric substrate materials () into a size and shape consistent with the distinct areas of the selected pattern so as to form a plurality of dielectric pieces (). Arranging the dielectric pieces on a base plate () in accordance with the selected pattern to form the textured dielectric substrate.

An electronic device includes a housing having a plurality of panels connected together to define a closed geometric shape having one or more corners. An electrically conductive layer is carried by the housing to define a first dipole element, and a second dipole element is carried by housing adjacent one corner thereof. Circuitry comprising at least one active electronic component, such as sensor and/or a battery, is mounted within the housing, and an antenna feed is connected between the circuitry and the first and second dipole elements.

Electronic device including tetrahedral antenna and associated methods

A substrate () for an RF device includes a plurality of layers () of dielectric material cofired in a stack. The plurality of layers () is formed from a material having a permittivity. Selected ones of the layers () have a pattern of perforations () formed in at least one perforated area (). The perforated areas () are generally aligned with one another in the stack to lower one or more of an effective value of a permittivity and a loss tangent in a least one spatially defined region () of the substrate ().

Dielectric substrate with selectively controlled effective permittivity and loss tangent

An optically active composition () for optical applications has been identified. The optically active composition () can include at least one cyclic molecule having a nanocore () disposed within the cyclic molecule to form a filled ring (). The composition () is optically transmissive for at least one photonic wavelength that would not otherwise be transmitted by the composition () if the nanocore were absent from the cyclic molecule. The cyclic molecule can be a carbon ring, an aromatic ring, or a heterocyclic ring. The filled ring () can be attached to a chiral molecule which is a repeat unit () in a polymeric backbone. A second filled ring () which causes the composition to be optically transmissive at a second wavelength also can be attached to the chiral molecule () as well. An electric field can be applied to the filled ring () to adjust the wavelength at which filled ring () is transmissive.

Tunable chiral film optical filter

The method includes selecting two or more types of ceramic materials ( ), each having a distinct set of electrical properties different from the other of the types of ceramic materials. A substrate pattern can also be selected. The substrate pattern can comprise at least two types of distinct substrate areas having the distinct sets of electrical properties of the ceramic materials. Each distinct area can be selected so as to have dimensions much smaller than a wavelength at a frequency of interest. The ceramic materials ( ) can thereafter be fired and then cut into a size and shape consistent with the distinct areas to form dielectric pieces ( ). The process continues by selectively arranging the dielectric pieces on a base plate ( ) in accordance with the pattern to form the textured ceramic dielectric substrate. The completed textured substrate ( ) will have at least one effective electrical property at a frequency of interest that is different from each of said distinct sets of electrical properties of the ceramic materials.

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Melbourne, FL, United States of America

Dennis Lee Tebbe