| 摘要 |
The present invention relates to an antenna system ( 1, 101, 201, 301, 401, 501 ) for tracking of a position of a target area ( 33, 133, 233, 333, 433, 533 ) within a body ( 5, 105, 205, 305, 405, 505 ), comprising a first antenna device ( 3, 103, 203, 303, 403, 503 ) and a second antenna device ( 9, 109, 209, 309, 409, 509 ), at least said second antenna device ( 9, 109, 209, 309, 409, 509 ) is to be located outside said body ( 5, 105, 205, 305, 405, 505 ), wherein an interface region ( 13, 113, 213, 313, 413, 513 ) between said body ( 5, 105, 205, 305, 405, 505 ) and at least said second antenna device ( 9, 109, 209, 309, 409, 509 ) at least partially consist of a dielectric medium having a relative permittivity closer to the permittivity of material within the body ( 5, 105, 205, 305, 405, 505 ) than the permittivity of air. |
