An antenna module includes an antenna and a periodic structure. The periodic structure is disposed on one side of the antenna, and includes a plural first pillars, a plural first bridge members, and a plural second pillars. The plural first pillars are arranged at intervals along a one-dimensional array. The plural first bridge members are arranged at intervals along the one-dimensional array, and are connected to a side of the plural first pillars away from the antenna, wherein the plural first bridge members define a second virtual layer. The plural of second pillars are arranged at intervals in parallel with the first pillars and are connected to a side of the plural first bridge members away from the antenna. Each of the second pillars each of and the first pillars adjacent thereto have an offset from each other in the direction perpendicular to the second virtual layer.

An electromagnetic blocking structure includes a dielectric substrate with at least one conductor layer in the dielectric substrate, the at least one conductor layer has a plurality of first unit cells of a first type without four-fold symmetry, and a plurality of second unit cells of the first type, the plurality of first unit cells and the plurality of second unit cells are arranged in a grid pattern with each first unit cell among the plurality of first unit cells being oriented substantially 90° relative to each second unit cell among the plurality of second unit cells.

The disclosure provides an integrated wave-absorbing and wave-transparent apparatus and a radome. The integrated wave-absorbing and wave-transparent apparatus includes: a wave-transparent structure, including a first substrate and a metal patch unit located on opposite surfaces of the substrate; and a wave-absorbing structure, disposed on the wave-transparent structure and including a first wave-absorbing unit and a second wave-absorbing unit that are perpendicular to each other, where the first wave-absorbing unit and the second wave-absorbing unit each includes: a second substrate; and a plurality of metal sections and a plurality of stop-bands that are located on surfaces of the second substrate, where the plurality of metal sections and the plurality of stop-bands are connected alternately to form an absorption ring, and the metal patch unit is configured to be perpendicular to each of an absorption ring of the first wave-absorbing unit and an absorption ring of the second wave-absorbing unit.

In one embodiment, a system includes a ground layer, a first layer, a second layer, and a plurality of vias. The first layer includes a first insulating material and a plurality of first metallic strips. The second layer includes a second insulating material and a plurality of second metallic strips. The plurality of vias electrically connect one or more of the plurality of first metallic strips of the first layer to one or more of the plurality of second metallic strips of the second layer. The plurality of first metallic strips of the first layer and the plurality of second metallic strips of the second layer form a plurality of capacitors and a plurality of conductors. Each capacitor is located in the first layer. Each conductor is partially located in the first layer and partially located in the second layer.

A multi-layer antenna assembly and related antenna array are provided. In one aspect, a multi-layer antenna assembly includes a first radiating layer(s) and a second radiating layer(s). The second radiating layer(s) is provided below and in parallel to the first radiating layer(s). The second radiating layer(s) overlaps at least partially with the first radiating layer(s). In this regard, an electromagnetic wave radiated vertically from the second radiating layer(s) is horizontally guided by an overlapping portion of the first radiating layer(s). In another aspect, an antenna array can be configured to include a number of multi-layer antenna assemblies to enable radio frequency (RF) beamforming. By employing the multi-layer antenna assemblies in the antenna array, it may be possible to flexibly and naturally steer an RF beam in a desired direction(s) without causing oversized side lobes, thus helping to improve power efficiency and performance of the antenna array.

An antenna assembly minimizes reflection from a proximate reflective surface over a wide band and over a wide range of incident angles as a multi-layer diffuser. The planar structure includes first and second planar layers, each layer having first areas that are more conductive than second areas. Each area has a periphery that extends along a grid of first and second sets of parallel lines so that each area comprises one or more contiguous elements defined by the lines. The first and second areas are configured and arranged so that the planar layer can communicate electromagnetic energy wirelessly in a specific direction to the planar layer when an electrical connection is made to the first area(s). The first planar layer is positioned on top of the second planar layer. The respective second areas of second planar layer aligned with a corresponding second area of the first planar layer.

A method of making a reconfigurable antenna comprises the steps of applying one or more first layers of a prepreg laminate fabric to a form having a desired contour; applying a pattern corresponding to an antenna shape to the first layers of prepreg fabric; applying one or more second layers of the prepreg laminate fabric atop the pattern to form a laminate stack; curing the laminate stack; and removing the pattern to form channels in the antenna shape. The desired contour may be an aircraft skin panel or an airfoil panel. The pattern may be a polymer sheet with an applied cPLA antenna design. The curing step may be performed in a vacuum bag under the application of vacuum and heat. The removing step may be performed by heating the cured laminate stack to remove the pattern.

A radome shell for shielding a radio-frequency (RF) antenna, the radome shell comprising one or more layers of dielectric material. At least one layer comprises a plurality of repetitive gaps, and at least one of width, length and depth of the repetitive gaps is of an order of magnitude of a working frequency wavelength of the RF antenna or one order of magnitude smaller than the working frequency wavelength of the RF antenna.

Embodiments of a filter for electromagnetic radiation are disclosed herein. The filter includes a first glass-ceramic substrate having a first refractive index, a second glass-ceramic substrate having the first refractive index, and a first region disposed between the first glass-ceramic substrate and the second glass-ceramic substrate. The first region has a second refractive index that is less than the first refractive index. Further, the second glass-ceramic substrate is arranged substantially parallel to and spatially disposed from the first glass-ceramic substrate. The filter transmits at least 70% of electromagnetic radiation within a band of frequencies and reflects at least 80% of electromagnetic radiation outside the band of frequencies. The band of frequencies is located within the frequency range of 20 GHz to 100 GHz.

According to an aspect, a wireless communication device is wearable on a living body. The wireless communication device includes an antenna and an attachment. The antenna has a first conductor, a second conductor, at least one third conductor, a fourth conductor, and a feeding line. The first conductor and the second conductor are opposed to each other in a first axis. The third conductor is positioned between the first conductor and the second conductor. The third conductor extends in the first axis. The fourth conductor extends in the first axis. The feeding line is electromagnetically connected to any one of at least one third conductor. The first conductor and the second conductor are capacitively connected to each other through the third conductor. The attachment allows the fourth conductor to be opposed to the living body.