An antenna apparatus includes a ground layer, patch antenna patterns, feed vias, ring-type meta patterns, and coupling-type meta patterns. The ground layer has one or more through-holes. Patch antenna patterns are each disposed above the ground layer. Feed vias are disposed to penetrate through the one or more through-holes, and electrically connect to the patch antenna patterns, respectively. Ring-type meta patterns are arranged between the patch antenna patterns. Coupling-type meta patterns are alternately arranged between the patch antenna patterns in fewer numbers than the ring-type meta patterns in positions more distant from the patch antenna patterns than positions in which the ring-type meta patterns are arranged.

An antenna array system includes a feed antenna and circuit boards. Each circuit board has pickup antenna elements disposed on a curved edge portion of a first edge of the circuit board, radiating elements disposed on a second edge portion of the circuit board, and transmit receive modules disposed between the pickup elements and the radiating elements on the circuit board. The antenna array can be part of an active electronically scanned array (AESA) antenna assembly.

A deployable reflectarray has a plurality of strips arranged in quadrants forming the reflectarray. The copper ground plane and the copper dipoles are supported by facesheets made of epoxy reinforced by quartz fibers. The copper ground plane is separated from the copper dipoles by S-shaped springs made of epoxy reinforced by quartz fibers, which allow folding and deployment of the reflectarray.

Embodiments of present disclosure are directed to apparatuses, systems, and methods relating to antenna apertures in phased array antenna systems directed to configuring antenna lattices in a space tapered configuration and mapping from the antenna lattices, interspersing of antenna elements in an antenna aperture, and rotation of antenna element in the antenna aperture for purity polarization.

An antenna structure includes: a plurality of array elements; at least one radio frequency component, including a plurality of feed ports; and a radio frequency switch, wherein the radio frequency switch is connected to at least two array elements and at least two feed ports of the at least one radio frequency component, the radio frequency switch is configured to switch a feed object of each feed port connected to the radio frequency switch to form a preset antenna array, and the feed object is any array element of the at least two array elements connected to the radio frequency switch.

An antenna apparatus includes a ground layer, patch antenna patterns, feed vias, ring-type meta patterns, and coupling-type meta patterns. The ground layer has one or more through-holes. Patch antenna patterns are each disposed above the ground layer. Feed vias are disposed to penetrate through the one or more through-holes, and electrically connect to the patch antenna patterns, respectively. Ring-type meta patterns are arranged between the patch antenna patterns. Coupling-type meta patterns are alternately arranged between the patch antenna patterns in fewer numbers than the ring-type meta patterns in positions more distant from the patch antenna patterns than positions in which the ring-type meta patterns are arranged.

A phase-controlled antenna array comprises at least four phase-controlled elements which are connected via a feed network. Each antenna element comprises a waveguide emitter with a signal output coupling or input coupling and a phase actuator which is rotatably attached in the waveguide emitter and contains a mounting and two polarizers, wherein each of the two polarizers can convert a circularly polarized signal into a linearly polarized signal. The antenna elements additionally comprise a connection element and a drive unit which is attached to a support and which is connected to the phase actuator via the connection element such that the drive unit can rotate the phrase actuator about an axis of the waveguide emitter. The antenna array additionally comprises a computing unit which is connected to the drive unit(s) of the phase-controlled antenna elements via control lines and which adjusts the rotation of each phase actuator.

A satellite system can include one or more satellites that orbit the Earth. The one or more satellites may have satellite buses that support antenna arrays. The antenna arrays may include space fed arrays. Each space fed array may have an antenna feed array and an inner array that is coupled to a direct radiating array. The direct radiating array may operate in the same satellite band as the space fed array, or upconversion and downconversion circuitry may be used to communicatively couple a direct radiating array that operates in a different satellite band to the space fed array. The satellites may have peripheral walls with corner fittings that can be selected to provide the satellite bus with particular leg strengths. This can reduce overall mass of the satellites in a payload fairing while accommodating different types of antenna arrays.

The present disclosure provides a spatial feeding end-fire array antenna based on electromagnetic surface technologies, including: a primary feed, configured to transmit and/or receive electromagnetic waves; and a single-layer and/or multi-layer medium-metal combination surface, configured to convert the electromagnetic waves emitted from the primary feed to an end-fire focused beam, or to concentrate space waves received in an end-fire direction into the primary feed. The single-layer and/or multi-layer medium-metal combination surface has a thickness that is equal to or less than one percent of working wavelength of the antenna.

The present invention discloses radar sensor system, operating in 24 GHz to 300 GHz frequency band, and its method of operation, comprising utilization of the passive markers, reflecting radio wave in the direction of illumination advantageously in cross polarization manner. The proposed system can detect if on the vehicle seat a baby, kid or adult average size person is sitting. The proposed system can detect intrusion, non-occupied area, belt speed, rotation speed and if the package is filled with sufficient level of liquids.