Techniques and mechanisms to transmit signals with an antenna array. In an embodiment, a first signal is received at a first input of the first antenna while a second signal is received at a second input of the second antenna. A difference in phase differentialsthe phase differentials each between the first signal and the second signalresults from propagation of the first signal and the second signal in the antenna array and from a difference between respective configurations of the first antenna and the second antenna. Each of the first antenna and the second antenna has respective emitters distributed along the length thereof. In another embodiment, the first antenna and the second antenna have different respective dielectric structures or different respective distributions of emitters.

Embodiments of a radio frequency feedline structure. A first printed circuit board (PCB) includes upper and lower metal layers and at least one cutout defining an upper portion of an open channel. The upper and lower metal layers are electrically connected by vias on opposite walls of the cutout. A second PCB includes upper and lower metal layers and elongated slots defining a suspended signal path within the open channel. The upper and lower metal layers are electrically connected by vias. A third PCB includes upper and lower metal layers and at least one cutout defining a lower portion of the open channel. The upper and lower metal layers are electrically connected by vias on opposite walls of the cutout. Respective upper and lower ground planes are electrically connected to the upper metal layer of the first PCB and the lower metal layer of the third PCB.

A symmetric leaky wave antenna includes a dielectric substrate, an electric wall, and two reflection bore arrays. The dielectric substrate has a first and a second metal layers disposed on two opposite faces thereof. The first metal layer has a feed end and two travelling wave sides. The electric wall is disposed between two travelling wave sides, with the two travelling wave sides symmetrically disposed with respect to the electric wall. The two reflection bore arrays are symmetrically disposed along the two travelling wave sides, respectively, with the electric wall arranged at a central line between the two reflection bore arrays. The two reflection bore arrays pass through the first metal layer, the second metal layer, and the dielectric substrate. The reflection bore array and the electric wall reduce the leakage rate of the electromagnetic wave, thus increasing the gain value of the antenna.

An apparatus includes a traveling-wave antenna array comprising a plurality of adjacent metamaterial surface antennas comprising a waveguide or a cavity, each adjacent metamaterial surface antenna comprising an array of metamaterial radiators coupled to a surface of the waveguide or the cavity, each metamaterial radiator comprising an individually addressable tunable component that can be tuned over a spectral bandwidth to generate different radiation patterns. The apparatus further includes a phase diversity feed coupled to the traveling-wave antenna array and configured to provide adjustable phase diverse input to two or more of the plurality of adjacent metamaterial surface antennas, the phase diverse input comprising a first phase for a first traveling-wave antenna and a second phase for a second traveling-wave antenna, the first phase being different from the second phase, wherein the phase diverse input is-selected to suppress grating lobes for a directed beam pattern selected for transmission.

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

An interleaved array of electronically steerable antennas is capable of simultaneously operating and/or independently beam scanning at different frequencies from a single aperture. An antenna system may comprise a plurality of electronically steerable antennas configured to be operable at different frequencies, each of the antennas comprising a feed launching a surface wave and surface-wave waveguides connected to the feed. The surface-wave waveguides of the antennas operable at different frequencies may be interleaved with each other.

Disclosed are embodiments of a wireless access device for use in a wireless backhaul network. In an embodiment, a wireless access device for accessing a wireless network comprises: a first antenna module including a plurality of traveling wave antennas, wherein at least one of the traveling wave antennas has at least two ports; and an interface circuit coupled to the first antenna array, the interface circuit configurable to interconnect one or more radios to the one or more traveling wave antennas, including selectively interconnecting a radio frequency (RF) signal from a radio to a first port of at least one traveling wave antenna to generate a first beam for a first non-line-of-sight (NLOS) link of a wireless backhaul network, and selectively interconnecting a same or different RF signal from the same or another radio to a second port of the traveling wave antenna to generate a second beam for a second NLOS link of the wireless backhaul network, wherein the first and second beams have different radiation patterns or polarization.

A combiner network is provided. The combiner network may include a combiner of a first type. The combiner network may further include a combiner of a second type. The combiner of a first type includes a first plurality of waveguide ports and an H-plane combiner connected to an E-plane combiner. The combiner of the second type includes a second plurality of waveguide ports and an H-plane combiner including a U-bend.

A combiner network is provided. A combiner network may include a corporate combiner. The corporate combiner may include a first plurality of radiation elements. The corporate combiner may include a first H-plane combiner connected to the first plurality of radiation elements and connected by a U-bend to a first E-plane combiner. The corporate combiner may include a second H-plane combiner connected to the first E-plane combiner. The corporate combiner may further include a first port. A plurality of corporate combiners may be assembled together as a combiner network.

An antenna array is provided that includes a plurality of radiating elements and one or more combiners. The plurality of radiating elements and the combiners are formed as a single indivisible metal element by use of additive manufacturing processes.