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.

Techniques and mechanisms for providing a low-profile terminal for satellite communication. In an embodiment, a communication terminal includes a radome, an array of radio frequency (RF) elements and a foam layer disposed therebetween. The foam layer includes a first side and a second side opposite the first side, wherein the array of RF elements and the radome are coupled to the foam layer via the first side and the second side, respectively. The communication device provides contiguous structure between the radome and the array of RF elements. In another embodiment, the first side forms a machined surface which contributes to flatness of one or more antenna panels having the array of RF elements disposed therein or thereon.

A gradient permittivity film comprises (a) a first permittivity layer comprising a first continuous matrix of a first material having a first relative permittivity (.sub.r1) and a second component having a second relative permittivity (.sub.r2) dispersed in the first continuous matrix, the first permittivity layer having a first effective layer relative permittivity (.sub.1) and a thickness (T.sub.1); And (b) a second permittivity layer having a second effective layer relative permittivity (.sub.2) and a thickness (T.sub.2) disposed on the first permittivity layer. T.sub.1=0.8(t.sub.1) to 1.2(t.sub.1), where $t_1=\frac{c}{4f\sqrt{{}_1}};T_2=0.8\left(t_2\right)\mathrm{to}1.2\left(t_2\right),\mathrm{where}{t}_2=\frac{c}{4f\sqrt{{}_2}}.$

A radome structure for a multilayered broadband radome structure is described. The radome structure may include a central core layer comprising a first dielectric constant, an interior intermediate core layer adjacent to an interior side of the central core layer, comprising a second dielectric constant less than the first dielectric constant, an exterior intermediate core layer adjacent to an exterior side of the central core layer, comprising a third dielectric constant less than the first dielectric constant, and an interior outside core layer adjacent to an interior side of the interior intermediate core layer, comprising a fourth dielectric constant less than the second dielectric constant. In some examples of the radome structure described above may further include an exterior outside core layer adjacent to an exterior side of the exterior intermediate core layer, comprising a low dielectric constant.

For example, an apparatus may include a Printed Circuit Board (PCB); a Multiple-Input-Multiple-Output (MIMO) radar antenna on the PCB, the MIMO radar antenna comprising a plurality of Transmit (Tx) antenna elements configured to transmit Tx radar signals, and a plurality of receive (Rx) antenna elements configured to receive Rx radar signals based on the Tx radar signals; and a surface wave mitigator connected to the PCB, the surface wave mitigator configured to mitigate an impact of surface waves via the PCB on a radiation pattern of the MIMO radar antenna.

A cover for an electronic device that transmits and receives radio waves in a high-frequency band, the cover comprising a resin and satisfying the relationship of the following formula:

(100?frontal transmittance X)?(100?oblique transmittance Y)<55

(where the frontal transmittance X (%) is a radio wave transmittance at an angle of incidence of 0? of the cover at a frequency f (Hz), and the oblique transmittance Y (%) is a radio wave transmittance of TE wave at an angle of incidence of 60? of the cover at the frequency f (Hz)).

A method of manufacturing a radome for encasing an antenna system, preferably for marine use, is described. The method comprising the steps of: providing one or more moulds for manufacturing a structural main body of the radome or parts of the structural main body of the radome, each of the one or more moulds comprising a mould cavity, injecting a foamed polymer material into the mould cavity or mould cavities of the one or more moulds to form the structural main body of the radome or parts of the structural main body of the radome, and optionally connecting the parts of the structural main body of the radome to form the main body of the radome. Further, a radome for encasing an antenna system, preferably for marine use, is described. The radome comprises a structural main body, which is made from a foamed polymer material.

The invention relates to a radome wall comprising a multilayer sheet, the multilayer sheet comprising: a) at least one sheet layer A comprising at least two monolayers, the monolayers comprising polymeric fibers, and b) at least one first film layer B1 comprising a polyolefin, wherein the multilayer sheet has a thickness of at least 0.05 mm and at most 0.8 mm. The invention also relates to a radome comprising the radome wall, the radome preferably being a non-ballistic radome, preferably suitable for telecommunications.

The present application relates to a multilayer composite sheet for antenna housing, a preparation method therefor, and use thereof. The multilayer polycarbonate composite sheet comprises a first non-foamed skin layer (1); a first adhesive layer (2); a core layer with a honeycomb structure (3); a second adhesive layer (4); and a second non-foamed skin layer (5) in order. The polycarbonate composite article according to the present invention can achieve improved signal transmission performance and reduced weight, and can be used as an outdoor and/or indoor antenna housing.

The radome (1) for vehicles comprises a first part (8) comprising a transparent layer (11) and at least one decoration layer (5, 6), a second part (10), and an intermediate part (9) placed between the first and second parts (8, 10), the intermediate part (9) being made from a thermoset compound.

The method for manufacturing said radome comprises the following steps: inserting both the first and second parts (8, 10) in a mold; and injecting a thermoset compound between them for forming the intermediate part (9).

It permits to provide a radome for vehicles with a better RF performance.