The invention relates to a high-frequency sensor, particularly a high-frequency sensor for detecting objects (34) hidden in a medium, comprising at least one antenna (10, 50) for transmitting and/or receiving high-frequency signals (20), particularly signals in a frequency range from 1 to 8 GHz. According to the invention, the at least one antenna (10, 50) is formed on an LTCC substrate (12, 48). The invention further relates to a machine tool, particularly a power tool (18), which is provided for driving a tool by means of boring and/or striking and comprises at least one such high-frequency sensor.
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