| 摘要 |
The system for detecting a position of an object in a plane (2), comprises in an operational state at least one antenna loop (10D+10E) aligned with the plane (2), an RF signal generator (41) for activating the antenna loop. The antenna loop has at least one antenna element (10D, 10E) with a cross-diameter (H) in a direction transverse to the plane that is larger than a cross-diameter (D) in a direction aligned with the plane. Alternatively or in addition the system for detecting a position of an object in a plane comprises in an operational state at least a first antenna loop (210D+210E), at least a second antenna loop (210C+210F), that extends at least partially outside the first antenna loop, an RF-signal generator (241) for providing the first antenna loop with an RF signal, an facility (243, 244) for providing the second antenna loop with an RF signal that is in phase with that of the RF-signal in the first antenna loop.
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