Abstract: A radar device for limiting radio-frequency power leakage is provided. The radar device includes a first component, and a second component. The first component has a first surface and a first waveguide that defines a first cavity. The second component has a second surface and a second waveguide that defines a second cavity. A first groove is provided that acts as a choke, and the first groove is defined in the first surface. The first component and the second component are assembled so that an air gap is maintained between the first waveguide and the second waveguide. The first waveguide and the second waveguide are configured to facilitate transmission of radio-frequency power. The first groove is configured to reduce leakage of radio-frequency power through the air gap. Additional chokes may also be included.

Abstract: Example radar apparatuses including a phase lock loop circuit used for processing both transmission signals and reflection signals are provided herein. An example apparatus includes a transmit signal generator electrically connected to an antenna and configured to generate a transmission signal at a transmit frequency, a receiver circuit electrically connected to the antenna and configured to receive a radar return signal and downconvert the radar return signal at a downconvert frequency for signal processing, and a phase lock loop circuit configured to be tuned to output both at the transmit frequency for transmission of the transmission signal by the antenna and the downconvert frequency for downconverting a frequency of the radar return signal for further signal processing. The transmit frequency is different from the downconvert frequency.

Abstract: Example radar apparatuses including a phase lock loop circuit used for processing both transmission signals and reflection signals are provided herein. An example apparatus includes a transmit signal generator electrically connected to an antenna and configured to generate a transmission signal at a transmit frequency, a receiver circuit electrically connected to the antenna and configured to receive a radar return signal and downconvert the radar return signal at a downconvert frequency for signal processing, and a phase lock loop circuit configured to be tuned to output both at the transmit frequency for transmission of the transmission signal by the antenna and the downconvert frequency for downconverting a frequency of the radar return signal for further signal processing. The transmit frequency is different from the downconvert frequency.