Abstract: An electronic device may include sensing circuitry that transmits radar signals and receives reflected signals over a set of antennas. Communications circuitry may use the antennas to transmit communications data subject to a maximum transmit power level. The sensing circuitry may generate Doppler information based on the reflected signals and may detect whether an external object is on a surface of the device based on the Doppler information. When the external object is detected on the surface, the external object is not within a hot-spot cone of the antennas and the communications circuitry may transmit the communications data without reducing the maximum transmit power level. When the external object is detected off the surface, the external object may be within the hot-spot cone and the communications circuitry may transmit the communications data with a reduced maximum transmit power level to satisfy regulatory limits on radio-frequency exposure or absorption.

Abstract: A method and apparatus for shaping signals transmitted via plated through holes (PTHs) utilizes standard back-drilling techniques to reduce the resonant stub lengths of ground PTHs in the vicinity of a back-drilled signal PTH.

Abstract: A method and apparatus for shaping signals transmitted via plated through holes (PTHs) utilizes standard back-drilling techniques to reduce the resonant stub lengths of ground PTHs in the vicinity of a back-drilled signal PTH.