A multi-beam transmit/receive device comprises a Circular Polarization Frequency Selective Surface (CPFSS) unit, a transmit (Tx) flat array antenna assembly with multi-bean flat array antenna and a receive (Rx) flat array antenna assembly with multi-bean flat array antenna. The Tx multi-beam antenna is poisoned with respect to the CPFSS unit so that its transmission is configured to be reflected by the CPFSS unit to a reflector and to be reflected by the reflector in a defined direction and the Rx multi-beam antenna is poisoned with respect to the CPFSS unit so that transmission that hits the reflector from the defined direction and passes through the CPFSS unit focuses on the Rx multi-beam antenna.

A method and apparatus for impedance matching for an antenna aperture are described. In one embodiment, the antenna comprises an antenna aperture having at least one array of antenna elements operable to radiate radio frequency (RF) energy and an integrated composite stack structure coupled to the antenna aperture. The integrated composite stack structure includes a wide angle impedance matching network to provide impedance matching between the antenna aperture and free space and also puts dipole loading on antenna elements.

An antenna unit and an antenna array. The antenna unit includes M layers of cross metal patches, M layers of dielectric substrates, and a metal ground layer, where M is an integer greater than 1. In addition, an i.sup.th-layer dielectric substrate is disposed between an i.sup.th-layer cross metal patch and an (i+1).sup.th-layer cross metal patch. The i.sup.th-layer cross metal patch, the i.sup.th-layer dielectric substrate, and the (i+1).sup.th-layer cross metal patch are sequentially stacked, and i is an integer ranging from 1 to M−1. An M.sup.th-layer cross metal patch, an M.sup.th-layer dielectric substrate, and the metal ground layer are sequentially stacked. The antenna unit and the antenna array formed by units may have a good polarization feature, a relatively wide operating bandwidth, and a relatively good phase shift feature.

Disclosed herein is an antenna device that includes a filter layer, an antenna layer, a divider layer, and ground patterns. The antenna layer has first and second radiation conductors and first and second ground pillars that surround the first and second radiation conductors, respectively. Each of the first and second ground patterns has a first area that overlaps a first space surrounded by the first ground pillars, a second area that overlaps a second space surrounded by the plurality of second ground pillars, and a third area that connects the first and second areas. A width of the third area in a width direction perpendicular to an arrangement direction of the first and second areas is smaller than a width of each of the first and second areas in the width direction.

An antenna and a radome that covers the antenna are provided, the radome includes a first part, a second part, and a third part each with a surface which is flush to each other, the first part has a beam transmission characteristic corresponding to a scanning angle of 0 degrees of a beam emitted by the antenna with an emission direction directed toward the first part, the second part has a beam transmission characteristic corresponding to a first scanning angle of a beam emitted by the antenna with an emission direction directed toward the second part, and the third part has a beam transmission characteristic corresponding to a second scanning angle of a beam emitted by the antenna with an emission direction directed toward the third part.

A circularly polarized radiating element includes at least one excitation aperture for a wave that is linearly polarized with what is referred to as an excitation first polarization, a frequency selective surface and a metasurface comprising a two-dimensional and periodic array of metasurface cells, the excitation aperture opening onto the metasurface, the metasurface cells all being oriented identically with respect to the excitation polarization and configured to: reflect an incident wave having the excitation polarization in order to form a reflected wave polarized with the excitation polarization, and depolarize and reflect the incident wave in order to form a reflected wave polarized with the orthogonal polarization, having a phase difference substantially equal to ±90° with respect to the reflected wave polarized with the excitation polarization, and having an amplitude substantially equal to the amplitude of a wave radiated by the frequency selective surface, generated from the reflected wave polarized with the excitation polarization.

A radio wave refracting plate includes a plurality of unit structures arrayed in a first plane direction and a reference conductor serving as a reference potential of the plurality of unit structures. The plurality of unit structures is represented by an equivalent circuit including three or more resonant circuits.

An electronic device may be provided with a display and a phased array antenna that transmits radio-frequency signals at frequencies greater than 10 GHz. The display may include a conductive layer that is used to form pixel circuitry and/or touch sensor electrodes. A filter may be formed from conductive structures within the conductive layer. The conductive structures may include an array of conductive patches separated by slots or may include conductive paths that define an array of slots. The filter may include an additional array of conductive patches stacked under the array of conductive patches to allow the slots to be narrower than would be resolvable to the unaided human eye. The periodicity of the conductive structures and the slots in the filter may be selected to tune a cutoff frequency of the filter to be greater than frequencies handled by the phased antenna array.

The embodiments are directed to radio frequency witness films. The embodiments include a unit cell in a three-dimensional coordinate frame of reference defined by an x-axis, a y-axis, and a z-axis. The unit cell is centered at an origin of the three-dimensional coordinate frame of reference. The unit cell includes a substrate, a first conductive layer, a dielectric layer, and a second conductive layer. The second conductive layer has at least two microstrip extensions that are perpendicular to each other in the x-y plane.

Described examples include an apparatus having a first antenna and a second antenna formed in a first layer on a first surface of a multilayer package substrate, the multilayer package substrate having layers including patterned conductive portions and dielectric portions, the multilayer package substrate having a second surface opposite the first surface. The apparatus also has an isolation wall formed in the multilayer package substrate formed in at least a second and a third layer in the multilayer package substrate and a semiconductor die mounted to the first surface of the multilayer package substrate spaced from and coupled to the first antenna and the second antenna.