Antenna device for short-range applications and use of an antenna device of this type

A traveling wave short-range antenna device, comprising:

• a first elongated bipolar coaxial conductor structure with a first internal conductor and a first external conductor which surrounds the first internal conductor coaxially,
• an antenna signal terminal at a first end of the first coaxial conductor structure, the antenna signal terminal comprising a first terminal contact on the first internal conductor and a second terminal contact on the first external conductor, the antenna signal terminal being configured to feed in an antenna transmitted signal and feed out an antenna received signal,
• a terminating impedance at a second end of the first coaxial conductor structure, the terminating impedance comprising a dipole connected to the first internal conductor at a first terminal contact and to the first external conductor at a second terminal contact, wherein the dipole comprises at least one capacitor and/or at least one inductance, such that,
• when transmitting the antenna transmitted signal, the terminating impedance is configured to couple a HF alternating current propagating through the first internal conductor and reaching the second end of the first coaxial conductor structure to the outside of the first external conductor at the second end of the first coaxial conductor structure, thereby generating a HF alternating current creating an electromagnetic travelling wave bound to the first coaxial conductor structure that originates from the second end of the first coaxial conductor structure and propagates via the first external conductor on the outside of the first external conductor, and that
• when receiving the antenna received signal, the terminating impedance is configured to couple a HF alternating current propagating through the first external conductor, flowing on the outside of the first external conductor and reaching the second end of the first coaxial conductor structure with the first internal conductor at the second end of the first coaxial conductor structure, thereby generating a HF alternating current that originates from the second end of the first coaxial conductor structure and propagates via the first internal conductor,
• wherein more than 50% of energy from an antenna transmission signal arriving at the second end of the first coaxial conductor structure travels back to the first end of the first coaxial conductor structure as said travelling wave, the antenna transmission signal being generated by the infeed of the antenna transmitted signal at the first end of the first coaxial conductor structure, and/or
• wherein more than 40% of energy of the infed antenna transmitted signal travels back towards the first end of the first coaxial conductor structure as said travelling wave.