A plasmonic patch antenna is provided that includes an arbitrary substrate with an optically thick ground plane proximate to the substrate. A first dielectric material with a first refractive index is proximate to the ground plane. A second dielectric material with a second refractive index is proximate to the first dielectric material. A periodic array of conducting rectangles is proximate to the second dielectric material. The first refractive index is greater than the second refractive index and a thickness of the first dielectric material is greater than a thickness of the second dielectric material.

An edge enabled void antenna (EEVA) apparatus is provided. The EEVA apparatus includes a conductive plane and a void is created on a geometric perimeter of the conductive plane to form an EEVA. A radio frequency (RF) port is coupled to the void to receive an RF signal. The RF signal excites the conductive plane to induce an electrical current along the geometric perimeter of the conductive plane. The void can cause the electrical current to increase and decrease on the geometric perimeter of the conductive plane, thus causing an electromagnetic wave corresponding to the RF signal being radiated from the EEVA. By forming the EEVA on the geometric perimeter of the conductive plane, it may be possible to enable a well-functioning antenna apparatus with a small effective footprint, thus allowing multiple EEVAs to be provided in a space confined wireless device with sufficient isolation for improved RF performance.

A device includes first and second directional antennas, an omnidirectional antenna, and a switch selectively coupled between the first directional and omnidirectional antennas. A first radio includes first RF circuitry. A switch selectively couples the first omnidirectional antenna or the first directional antenna to the first radio. A second radio is coupled to the second directional antenna and includes second RF circuitry. An application processor receives, from first RF circuitry, a first radio frequency performance indicator (RFPI) value for signals received over the omnidirectional antenna, a second RFPI value for signals received over the first directional antenna, and, from the second RF circuitry, a third RPI value for signals received over the second directional antenna. The application processor determines a best RFPI value, selects an antenna corresponding to the best RFPI value, and selects a radio corresponding to the selected antenna.

In one embodiment, an antenna for receiving incident electromagnetic (EM) radiation includes a dipole having first and second elements, and a reflector for reflecting the incident EM radiation into reflected EM radiation. The reflector, first element, and second element are configured to orient the first element substantially broadside to the reflected EM radiation and end-fire to the incident EM radiation when the second element is oriented substantially broadside to the incident EM radiation. Conversely, they are configured to orient the second element substantially broadside to the reflected EM radiation and end-fire to the incident EM radiation when the first element is oriented substantially broadside to the incident EM radiation.

[OBJECT] To provide a radar device capable of detecting a position of a target in a direction orthogonal to a viewing angle.

[ORGANIZATION] In a radar device which detects a target by using a radio wave, the radar device includes: a receiving array antenna (receiving array antenna 17) where a plurality of receiving antenna elements (first receiving antenna 17-1 to eighth receiving antenna 17-8) each having a predetermined length in a first direction are arranged to be disposed in a second direction almost orthogonal to the first direction; a dispersion part (dispersion part 31) which is disposed in a vicinity of the receiving array antenna, and dispersion properties of the radio wave change with respect to the first direction; and a detection part (control and process part 15) which detects the position of the target in the first direction based on the radio wave reflected by the dispersion part.

A multiband antenna, having a reflector, and a first array of first radiating elements having a first operational frequency band, the first radiating elements being a plurality of dipole arms, each dipole arm including a plurality of conductive segments coupled in series by a plurality of inductive elements; and a second array of second radiating elements having a second operational frequency band, wherein the plurality of conductive segments each have a length less than one-half wavelength at the second operational frequency band.

Apparatus for generating THz (terahertz) radiation, the apparatus comprising: a substrate; a planar array of asymmetric point antennas formed on the substrate and excitable by a pump pulse of radiation to radiate THz radiation the point antennas having characteristic dimensions substantially smaller than wavelengths of the radiated THz; wherein the array comprises point antennas aligned in different directions.

Apparatus for generating THz (terahertz) radiation, the apparatus comprising: a substrate; a planar array of asymmetric point antennas formed on the substrate and excitable by a pump pulse of radiation to radiate THz radiation the point antennas having characteristic dimensions substantially smaller than wavelengths of the radiated THz; wherein the array comprises point antennas aligned in different directions.

A wireless communication apparatus includes a first conductor and a second conductor that function as a set of electrodes for wireless communication, a third conductor and a fourth conductor that function as another set of electrodes for wireless communication. A difference between a first distance between a centroid of the first conductor and a centroid of the third conductor and a second distance between a centroid of the second conductor and the centroid of the third conductor is less than a width of the first conductor and a width of the second conductor. A third distance between the centroid of the first conductor and a centroid of the fourth conductor is longer than the first distance. A fourth distance between the centroid of the second conductor and the centroid of the fourth conductor is longer than the second distance.

A wireless communication apparatus includes a first conductor and a second conductor that function as a set of electrodes for wireless communication, a third conductor and a fourth conductor that function as another set of electrodes for wireless communication. A difference between a first distance between a centroid of the first conductor and a centroid of the third conductor and a second distance between a centroid of the second conductor and the centroid of the third conductor is less than a width of the first conductor and a width of the second conductor. A third distance between the centroid of the first conductor and a centroid of the fourth conductor is longer than the first distance. A fourth distance between the centroid of the second conductor and the centroid of the fourth conductor is longer than the second distance.