A waveguide disclosed herein may be implemented as a hollow irregular hexagonal metal structure which receives an electromagnetic signal and propagates the signal through the hollow hexagonal metal structure. The waveguide may be fabricated using metal additive manufacturing techniques and include one or more downward facing and unsupported surfaces.

Aspects of the present disclosure provide a waveguide assembly that employs a non-radiative dielectric waveguide at a bend and a dielectric waveguide away from the bend. By implementing a non-radiative dielectric wave guide at the bend and a dielectric waveguide away from the bend the power dissipated during propagation can be minimized without necessitating an increase in the size of the system. A method of manufacture of the waveguide assembly is also provided.

A multilayer substrate (11) includes: a first dielectric layer (41) having a first conductive layer (21) on one side and a second conductive layer (22) on another side; a second dielectric layer (42) having a third conductive layer (23) on one side and a fourth conductive layer (24) on another side, the third conductive layer (23) being located apart from the second conductive layer (22); one or a plurality of intermediate dielectric layers (43) provided between the second conductive layer (22) and the third conductive layer (23); and a waveguide (31) which is a conductive tubular member contacting with an inner peripheral surface of a through hole penetrating through specific parts of the intermediate dielectric layers (43) in a direction from the second conductive layer (22) to the third conductive layer (23), an inside of the tubular member being filled with a dielectric material made of a material different from the first dielectric layer (41), the second dielectric layer (42), and the intermediate dielectric layer (43). A cross-section of the waveguide (31) along a direction perpendicular to a direction of penetration through the intermediate dielectric layers (43) has a shape obtained by cutting out both corners on one diagonal line of a quadrangular shape.

A right-angle elbow assembly includes: a first end portion and a second end portion; a connect portion extending between the first end portion and the second end portion; and a ridge portion positioned in the connect portion and above a transition surface of the connect portion.

A radiation support system for radiation therapy includes a waveguide assembly. The waveguide assembly includes a waveguide extending along a first axis, a mode launcher extending along a second axis, the second axis being different than the first axis, and a resonant cavity twist coupling the waveguide to the mode launcher.

The present disclosure relates an antenna assembly that includes an antenna structure and a substrate. The antenna structure may be formed from a single contiguous piece of metal. The antenna structure may include at least one slot antenna formed in the single contiguous piece of metal. The substrate may include at least one dielectric layer, and a waveguide comprising a metallized cavity that extends through the at least one dielectric layer. The antenna structure may be attached to the substrate, may be disposed at an upper surface of the substrate, and may cover the metallized cavity of the waveguide. The substrate may be a printed circuit board (PCB) substrate, an in-mold electronics (IME) substrate, a molded interconnect device (MID) substrate, or another suitable substrate.

A radar device includes a radar transmitting and receiving millimeter-wave electromagnetic waves, a storage storing the radar and including an opening portion through which the electromagnetic waves radiated from the radar pass, a light guide plate being in contact with a periphery of the opening portion of the storage and covering an entire of the opening portion, and a light emitter causing light to be incident on a light entrance surface being a surface on which light is incident among lateral surfaces of the light guide plate.

A radar control module includes a printed circuit board including a radio frequency port. A trough waveguide antenna is mounted to the printed circuit board and includes a base and a first sidewall and a second sidewall each extending from the base. A fin extends from the base along a center region between the first sidewall and the second sidewall and an open side opposite the base. A first channel is disposed between the first sidewall and the fin and a second channel is formed between the second sidewall and the fin. The trough waveguide antenna includes a bend region in which the first channel is on an interior of the bend region and the second channel is on an exterior of the bend region and a depth of the first channel is deeper in the bend region than a depth of the second channel in the bend region.

A waveguide with a curved-wall low-pass filter is described herein. The waveguide comprises a low-pass filter portion configured to allow low-frequency electromagnetic energy therethrough and reject high-frequency electromagnetic energy. The low-pass filter portion comprises an input port, an output port, and a cavity feature that is formed between the input port and the output port. The cavity feature has a greater depth than respective depths of the input port and the output port. The cavity feature comprises a bottom wall that achieves the greater depth for the cavity feature. The bottom wall comprises at least one curved portion configured to allow the cavity feature to achieve the allowance of the low-frequency electromagnetic energy and the rejection of the high-frequency electromagnetic energy. The cavity feature may allow the waveguide to have as good or better performance than traditional means while being easier to manufacture and/or taking up less space.