A directional waveguide coupler (20) has four input ports and four output ports. Each input port is coupled to each of the output ports. The directional coupler (20) includes a first coupler having two waveguides (W1, W2) coupled to each other by a first slot array (S1), defined in a first wall (21) common to the two waveguides (W1, W2) of the first coupler. A second coupler has two waveguides (W3, W4), coupled to each other by a second slot array (S2), defined in a second wall (22) common to the two waveguides (W3, W4) of the second coupler. The first and second slot arrays (S1, S2) lie on a first common plane. The first and second couplers are coupled to each other by a third slot array (S3) and a fourth slot array (S4), which lie on a second common plane perpendicular to the first common plane.

An illustrative example embodiment of an antenna device includes a substrate, a plurality of antenna elements supported on the substrate, an integrated circuit supported on one side of the substrate, and a metallic waveguide antenna situated against the substrate. The metallic waveguide antenna includes a heat dissipation portion in a thermally conductive relationship with the integrated circuit. The heat dissipation portion is configured to reduce a temperature of the integrated circuit.

An illustrative example embodiment of an antenna device includes a substrate, a plurality of antenna elements supported on the substrate, an integrated circuit supported on one side of the substrate, and a metallic waveguide antenna situated against the substrate. The metallic waveguide antenna includes a heat dissipation portion in a thermally conductive relationship with the integrated circuit. The heat dissipation portion is configured to reduce a temperature of the integrated circuit.

In examples, systems and methods for waveguide antenna arrays with integrated filters are described. An example waveguide antenna array element a waveguide section has a first end and second end. The waveguide section is configured to propagate electromagnetic energy. The waveguide antenna array element also includes a feed configured to launch an electromagnetic wave into the first end of the waveguide section. The waveguide antenna array element also includes a waveguide filter having at least one waveguide cavity coupled to the second end of the waveguide section. The waveguide filter is configured to pass a first set of electromagnetic frequencies and reject a second set of electromagnetic frequencies. Yet further, the waveguide antenna array element includes an antenna coupled to the waveguide filter configured to radiate a portion of the electromagnetic energy passed by the waveguide filter.

An apparatus may include a substrate assembly having a first side and a second side. The apparatus may further include a waveguide antenna element positioned on the first side of the substrate assembly. The apparatus may also include a first reference ground plane positioned on the first side of the substrate assembly and enclosing the waveguide antenna. The apparatus may include a stripline positioned within the substrate assembly. The apparatus may further include a second reference ground plane positioned on the second side of the substrate assembly.

An apparatus may include a substrate assembly having a first side and a second side. The apparatus may further include a waveguide antenna element positioned on the first side of the substrate assembly. The apparatus may also include a first reference ground plane positioned on the first side of the substrate assembly and enclosing the waveguide antenna. The apparatus may include a stripline positioned within the substrate assembly. The apparatus may further include a second reference ground plane positioned on the second side of the substrate assembly.

The present disclosure relates to a waveguide fed open slot antenna. In some examples, the antenna comprises a waveguide section, a slot, a matching load, a waveguide bottom extension, and a vertical metal wall. The waveguide section can be in the form of a rectangular waveguide or a substrate integrated waveguide (SIW). The slot can comprise a rectangle, with one of its long sides abutting the top surface of the waveguide section, and another long side abutting the matching load, while the two short sides do not connect any metal. The waveguide bottom extension can be rectangular. The end of the waveguide bottom extension and the edge of the matching load on the side close to the open slot can be connected together by the vertical metal wall. In this way, the slot can be excited.

An antenna structure having a waveguide configured to operate as at least a portion of an antenna. Also, the waveguide may be configured to operate as a first antenna, and the waveguide has a hole configured to operate as a second antenna.

An antenna structure having a waveguide configured to operate as at least a portion of an antenna. Also, the waveguide may be configured to operate as a first antenna, and the waveguide has a hole configured to operate as a second antenna.

A radio frequency (RF) printed circuit board (PCB) including a ground plane, a microstrip transmission line, a patch antenna element, a waveguide, and a dielectric lens. The RF PCB includes a first substrate having a top surface on which the patch antenna element is disposed, the patch antenna element including a slot aperture. The microstrip transmission line is disposed between the first substrate and a second substrate, and is configured to be electromagnetically coupled to the patch antenna element through the slot aperture. The ground plane is disposed on a third substrate and is electromagnetically coupled to the microstrip transmission line. The waveguide includes an aperture attached to the top surface and encloses the patch antenna element. The waveguide is configured to be electromagnetically coupled to the patch antenna element. The dielectric lens is disposed on the patch antenna element and extends into the aperture of the waveguide.