A broadband stacked multi-spiral antenna array comprising two or more spiral antennas with a dielectric layer having a generally uniform thickness positioned between each pair of stacked antennas, which are all center-fed and in-phase. The antenna array may be embedded in a non-conductive material, such as fiberglass embedded in a resin, a honeycomb core sandwich, or structural foam, that may be used to form a structural element of a mobile platform. The structural element may include a via providing a pathway for coaxial cables. If two structural elements are hatch covers on the port and the starboard sides of an aircraft, the use of a stacked multi-spiral antenna array in each structural element provides two roughly hemispherical coverage patterns which together provide an omni-directional coverage pattern. The stacked multi-spiral antenna array may also include a reflecting cavity placed at the bottom of one of the spiral antennas.

Antenna for a motor vehicle, comprising a mounting plate suitable to be connected to a mounting surface of the motor vehicle, a first printed circuit board adapted to be connected, in a substantially horizontal position, to the mounting plate, first and second radiating elements for transceiving respective first and second signals with the environment outside the antenna.

Both radiating elements comprise a respective printed circuit board along which there are arranged respectively a first electrically conducting track and a second electrically conductive track which extend along the respective printed circuit board along a substantially helical or serpentine path.

The first radiating element has a maximum height, measured from the top surface of the first printed circuit board along the substantially vertical direction, and the first height of the first electrically conducting track is less than or equal to one-half of the maximum height of the first radiating element.

A radome having localized areas of reduced radio signal attenuation includes a body having a first portion and a second portion. The first portion has a reduced radio signal attenuation property in a transmit band and a second portion has a reduced radio signal attenuation property in a reception band.

An antenna system can include a first panel of radiators that extend from a vertex in a first substantially linear direction. The antenna system can also include a second panel of radiators extending from the vertex in a second substantially linear direction. The first panel of radiators and the second panel of radiators form an angle between about 1 degree and about 45 degrees to enhance gain.

A truss-reinforced radome crown structure (TRRCS) that functions in combination with an aircraft and a communication radome or antenna. The TRRCS maintains and protects a radome and antenna located on an aircraft's fuselage. The TRRCS includes a fairing that is preferably elliptical shaped, a truss structure that is located within and circumvents the fairing, and truss/fairing attachment means that comprise a plurality of links/rods and pins or tubes, and/or exterior horizontal intercostal rods. Once the TRRCS is attached, a radome and antenna is enclosed and protected, and the design of the TRRCS allows it to compensate for the expansion and contraction as well as other forces experienced by an aircraft while in flight.

A radome having localized areas of reduced radio signal attenuation includes a body having a first portion and a second portion. The first portion has a reduced radio signal attenuation property in a transmit band and a second portion has a reduced radio signal attenuation property in a reception band.

Wireless communication device (WCD) for use in an unmanned aerial vehicle (UAV) includes a multi-purpose WCD accessory. The accessory is comprised of a first plate having opposed first and second major faces. The first major face includes a heat transfer surface configured to contact a body of the WCD interior of the UAV when the WCD is secured to the first major face. A second plate is attached to the second major face in a cantilever configuration and extends exterior of the fuselage in a direction away from the second major surface. The second plate comprises at least a portion of a ground plane for an antenna system utilized by the WCD, and together with the first plate forms a heat sink for the WCD.

An all-ceramic frequency selective surface (ACFSS) material is provided for use in high temperature environments where there is a need for selective transmission of a defined wavelength band of electromagnetic radiation through the material. Unlike traditional frequency selective surfaces that use metals to form a structured or patterned layer that defines the passband, the present ACFSS material uses electrically conductive ceramic materials to form the patterned layer, giving the material a much greater heat stability than metal-containing frequency selective surface materials.

A radio device includes a surface-mountable antenna module. The surface-mountable antenna module includes a housing configured to mount to an external surface of a vehicle. The surface-mountable antenna module also includes a receiver configured to receive an output radio frequency (RF) signal. The surface-mountable antenna module includes an antenna configured to transmit the output RF signal and receive a return RF signal. The surface-mountable antenna module also includes circuitry coupled to the antenna. The circuitry is configured to generate a digitized output RF signal and generate a digitized return RF signal. The surface-mountable antenna module further includes an electrical connector coupled to the circuitry. The electrical connector is configured to output data representing the digitized output RF signal and the digitized return RF signal.

A monopole antenna for a motor vehicle. The antenna includes a radiating element, a printed circuit board, an electrical contact and a containment enclosure. The radiating element is for transceiving signals with the environment outside the antenna. The electrical contact is configured to electrically connect the radiating element to the printed circuit board. The containment enclosure has at least a first component and a second component that are coupled together and are configured to define one or more internal housing spaces for at least the radiating element and the printed circuit board. The at least one first and second components are connected to each other at least by a waterproof junction.