This document describes techniques and apparatuses for a plastic air-waveguide antenna with conductive particles. The described antenna includes an antenna body made from a resin embedded with conductive particles, a surface of the antenna body that includes a resin layer with no or fewer conductive particles, and a waveguide structure. The waveguide structure can be made from a portion of the surface on which the embedded conductive particles are exposed. The waveguide structure can be molded as part of the antenna body or cut into the antenna body using a laser, which also exposes the conductive particles. If the waveguide is molded as part of the antenna body, the conductive particles can be exposed by an etching process or by using the laser. In this way, the described apparatuses and techniques can reduce weight, improve gain and phase control, improve high-temperature performance, and avoid at least some vapor-deposition plating operations.

A device for receiving and re-radiating electromagnetic signals. The device includes at least a waveguide with a first set of slot radiators for receiving electromagnetic signals, and a second set of slot radiators for transmitting electromagnetic signals generated on the basis of the received electromagnetic signals in the waveguide. The first set of slot radiators includes one or more slot radiators, and the second set of slot radiators includes one or more slot radiators. The device also relates to a method for receiving and re-radiating electromagnetic signals by a device including at least a waveguide, and the use of the device as a repeater of electromagnetic signals, for transferring electromagnetic signals through a structure, and/or as a building product.

Provided is a waveguide tube slot antenna (A), including: a waveguide tube (10) having a transverse section having a rectangular shape in each part of a waveguide (2) in an extending direction thereof; and a plurality of radiating slots (3) arranged in the waveguide tube (10) at predetermined intervals, in which: the waveguide tube (10) includes a first waveguide tube forming member (11) and a second waveguide tube forming member (12) each having the transverse section having a shape with an end, the first waveguide tube forming member (11) and the second waveguide tube forming member (12) being configured to define the waveguide (2) by being coupled to each other; and the first waveguide tube forming member (11) is formed to have a flat shape and includes the plurality of radiating slots (3).

A method may involve receiving one or more criteria for a waveguide array antenna. The waveguide array antenna includes a plurality of waveguides. The plurality of waveguides may include a plurality of radiation elements. The method may also involve determining a dataset configured to associate radiation characteristics of a given radiation element with given configuration parameters including a given resonance length a given rotation angle of the given radiation element. The method also involves generating configuration parameters for the plurality of radiation elements based on the dataset. The configuration parameters may cause the waveguide array antenna to be associated with the one or more criteria. The method may also involve providing a request for fabrication of the waveguide array antenna to have the plurality of radiation elements configured according to the configuration parameters.

There is disclosed a reconfigurable antenna device comprising a plurality of antennas disposed about a periphery of a substantially rectangular shape having top, bottom, left and right sides. The antenna device includes a first balanced antenna having first and second radiating arms each having a proximal portion and a distal portion, proximal portions extending along the top side in respectively opposed directions from a substantially central feed point, and the distal portions extending part way down the left and right sides. The antenna device further includes a first unbalanced antenna located generally between the distal portions and adjacent to the proximal portions of the first and second radiating arms. In addition, the antenna device includes a second balanced antenna having a first radiating arm extending up the left side from a feed peed point in a bottom left corner of the periphery and a second radiating arm extending along the bottom side from the feed point in the bottom left corner of the periphery, and a third balanced antenna having a first radiating arm extending up the right side from a feed point in a bottom right corner of the periphery and a second radiating arm extending along the bottom side from the feed point in the bottom right corner of the periphery.

An antenna and method for using the same are disclosed. In one embodiment, an antenna comprises a radial waveguide; an aperture operable to radiate radio frequency (RF) signals in response to an RF feed wave fed by the radial waveguide; and a radio frequency (RF) choke operable to block RF energy from exiting through a gap between outer portions of the waveguide and the aperture.

A phased array antenna includes a resonant cavity, a plurality of feed waveguides, an array of slot antenna elements, and a plurality of phase shifters. The resonant cavity includes a boresight surface having a normal vector oriented with boresight for the phased array antenna. The plurality of feed waveguides is distributed along a perimeter of the resonant cavity and is configured to supply electromagnetic waves to the resonant cavity. The array of slot antenna elements is distributed about the boresight surface and configured to radiate a beam based on standing waves within the resonant cavity. Each of the plurality of phase shifters is respectively coupled with the plurality of feed waveguides and independently controllable to modify the respective phases of the standing waves to steer the beam.

Radiofrequency module, including: a first layer including an array of radiating elements, each radiating element having a cross section for supporting at least one wave propagation mode, a second layer forming an array of waveguides; a fourth layer forming an array of ports; the second layer being interposed between the first and the fourth layer; each waveguide being connected to a port on the one hand and to a radiating element on the other hand for transmitting a radiofrequency signal between this port and this radiating element; the spacing between two ports being different from the spacing between the radiating elements, so that the surface area of the first layer is different from the surface area of the fourth layer; the waveguides being curved.

Disclosed is a radar antenna including an antenna body including a first plate and a second plate; a slot radiation part and a slot reception part formed in the first plate; a transmission port and a reception port formed in the second plate; and a waveguide formed by assembling the first and second plates. The slot radiation part includes a first slot radiation part configured to radiate a radio wave in a first detection range, and a second slot radiation part configured to radiate radio waves in a second detection range having a larger width and distance than the first detection range.

An embodiment of an antenna includes first and second transmission lines, first antenna elements, and second antenna elements. The first transmission line is configured to guide a first signal such that the first signal has a characteristic of a first value, and the second transmission line is configured to guide a second signal such that the second signal has the same characteristic but of a second value that is different than the first value. The first antenna elements are each disposed adjacent to the first transmission line and are each configured to radiate the first signal in response to a respective first control signal, and the second antenna elements are each disposed adjacent to the second transmission line and are each configured to radiate the second signal in response to a respective second control signal. Such an antenna can have better main-beam and side-lobe characteristics, and a better SIR, than prior antennas.