GF82.62-P-3106-04T Rear Window Antennas, Function

GF82.62-P-3106-04T Rear Window Antennas, Function
- except CODE (494) USA version
- except CODE (498) Japan version


The high frequency (HF) oscillation of the electrical field in the air is converted into a high-frequency AC voltage in an electrical conductor.

A standing electrical wave is formed in the antenna as a result of the correct matching of the length of the antenna to the wavelength of the frequency to be received. In this case, the amplitude of the HF signal has a constant value at a random point of the antenna. However, at the connecting point the HF signal level is at the maximum. A deviation in the antenna length in relation to the optimum length leads to a reduction of the HF signal level at the antenna output.

If the deviation is too large, no further HF signal is received (e.g. if the antennas are connected to the antenna amplifier incorrectly). The telephone antenna (A2/49a1) and the GPS antenna (A2/49a2) in the top of the rear window are active antennas. Both antennas are supplied with power by the telecommunications control unit (N112). One antenna cable is required per antenna.