Abstract: This document describes techniques and systems for a vertical microstrip-to-waveguide transition. A radar system may include a monolithic microwave integrated circuit (MIMIC) to generate electromagnetic signals and a printed circuit board (PCB) that includes a first surface, a microstrip, and a grounding pattern. The microstrip can be located on the first surface and operatively connect to the MIMIC. The grounding pattern is located on the first surface and made of conductive material. The radar system also includes a transition channel positioned over the grounding pattern, which includes a vertical taper between a bottom surface and a top surface. The transition channel defines a dielectric-filled portion formed by the grounding pattern and its interior surface. The described vertical transition can reduce manufacturing costs and support a wide bandwidth by tolerating an air gap at the transition-to-waveguide interface.

Abstract: A test fixture for PCB components is described herein. The test fixture comprises a shim with an aperture configured to direct RF energy from a component of a PCB, via an end of the PCB, and to a top clamp of the test fixture. The end of the PCB may correspond to a cut line of a destructive test. The test fixture also comprises the top clamp with a test port and a taper configured to direct the RF energy from the aperture to the test port. The test fixture also comprises a bottom clamp attached to the top clamp to retain the PCB between the top and bottom clamps for testing. The test fixture allows for quick mounting of the PCB and testing of the component without modifying a design of the PCB or requiring specific drilling of the PCB.

Abstract: 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.

Abstract: This document describes techniques and systems for a vertical microstrip-to-waveguide transition. A radar system may include a monolithic microwave integrated circuit (MIMIC) to generate electromagnetic signals and a printed circuit board (PCB) that includes a first surface, a microstrip, and a grounding pattern. The microstrip can be located on the first surface and operatively connect to the MIMIC. The grounding pattern is located on the first surface and made of conductive material. The radar system also includes a transition channel positioned over the grounding pattern, which includes a vertical taper between a bottom surface and a top surface. The transition channel defines a dielectric-filled portion formed by the grounding pattern and its interior surface. The described vertical transition can reduce manufacturing costs and support a wide bandwidth by tolerating an air gap at the transition-to-waveguide interface.

Abstract: This document describes techniques, apparatuses, and systems for a waveguide with slot antennas and reflectors. An apparatus may include a waveguide channel that includes a hollow channel containing a dielectric and an array of slot antennas through a surface that is operably connected with the dielectric. The apparatus also includes reflectors positioned adjacent to and offset from each longitudinal side of the waveguide channel. The reflectors and the waveguide channel are positioned to generate a particular radiation pattern for an antenna element electrically coupled to the dielectric. In this way, the described waveguide with slot antennas and reflectors can adjust the positioning of the reflectors to provide a radiation pattern with a wide or asymmetric beamwidth.

Abstract: Waveguide assemblies are described that utilize a surface-mount waveguide for vertical transitions of a printed circuit board (PCB). The surface-mount waveguide enables low transmission-loss (e.g., increased return-loss bandwidth) by utilizing a waveguide cavity positioned over a plated slot to efficiently transfer electromagnetic energy from one side of the PCB to another side. The waveguide cavity is designed to excite two resonant peaks of the EM energy to reduce a return-loss of power and increase power delivered to an antenna while supporting a high bandwidth of EM energy. Furthermore, the surface-mount waveguide does not require precise fabrication often required for vertical transitions, allowing the surface-mount waveguide to be compatible with low-cost PCB materials (e.g., hybrid PCB stack-ups).

Abstract: A test fixture for PCB components is described herein. The test fixture comprises a shim with an aperture configured to direct RF energy from a component of a PCB, via an end of the PCB, and to a top clamp of the test fixture. The end of the PCB may correspond to a cut line of a destructive test. The test fixture also comprises the top clamp with a test port and a taper configured to direct the RF energy from the aperture to the test port. The test fixture also comprises a bottom clamp attached to the top clamp to retain the PCB between the top and bottom clamps for testing. The test fixture allows for quick mounting of the PCB and testing of the component without modifying a design of the PCB or requiring specific drilling of the PCB.

Abstract: A test fixture for PCB components is described herein. The test fixture comprises a shim with an aperture configured to direct RF energy from a component of a PCB, via an end of the PCB, and to a top clamp of the test fixture. The end of the PCB may correspond to a cut line of a destructive test. The test fixture also comprises the top clamp with a test port and a taper configured to direct the RF energy from the aperture to the test port. The test fixture also comprises a bottom clamp attached to the top clamp to retain the PCB between the top and bottom clamps for testing. The test fixture allows for quick mounting of the PCB and testing of the component without modifying a design of the PCB or requiring specific drilling of the PCB.

Abstract: A test fixture for PCB components is described herein. The test fixture comprises a shim with an aperture configured to direct RF energy from a component of a PCB, via an end of the PCB, and to a top clamp of the test fixture. The end of the PCB may correspond to a cut line of a destructive test. The test fixture also comprises the top clamp with a test port and a taper configured to direct the RF energy from the aperture to the test port. The test fixture also comprises a bottom clamp attached to the top clamp to retain the PCB between the top and bottom clamps for testing. The test fixture allows for quick mounting of the PCB and testing of the component without modifying a design of the PCB or requiring specific drilling of the PCB.

Abstract: Waveguide assemblies are described that utilize a surface-mount waveguide for vertical transitions of a printed circuit board (PCB). The surface-mount waveguide enables low transmission-loss (e.g., increased return-loss bandwidth) by utilizing a waveguide cavity positioned over a plated slot to efficiently transfer electromagnetic energy from one side of the PCB to another side. The waveguide cavity is designed to excite two resonant peaks of the EM energy to reduce a return-loss of power and increase power delivered to an antenna while supporting a high bandwidth of EM energy. Furthermore, the surface-mount waveguide does not require precise fabrication often required for vertical transitions, allowing the surface-mount waveguide to be compatible with low-cost PCB materials (e.g., hybrid PCB stack-ups).

Abstract: Techniques are provided herein for utilizing a push notification action engine (e.g., a push notification action engine of a client device). The techniques include receiving a push notification comprising a structured data payload, the structured data payload comprising a specification of content to be rendered on a display of the client device. The push notification action engine generates display information in accordance with the specification and sends the display information to the operating system of the client device. Sending the display information to the operating system may cause the operating system to render a user interface component on the display of the client device. The push notification action engine may receive user input associated with the user interface component and cause execution of one or more workflows in response to receipt of the user input.