AIRCRAFT GROUND SPEED AND THE CRAB ANGLE MEASURING DEVICE Russian patent published in 2018 - IPC G01S13/58 

FIELD: measuring equipment.

SUBSTANCE: invention relates to the measuring equipment, in particular to the aircraft ground speed and the crab angle measuring devices in autonomous navigation systems using electromagnetic waves. Aircraft ground speed and the crab angle meter contains two SHF generators, the first and second directional couplers, two circulators, two antennas oriented at an angle of β₀ to the surface and angle of θ from the right and left sides of its axis, the first and second mixers and the computing unit. At that, the through directional couplers generators are connected to the circulators first terminals, the antennas are connected to their second terminals. By the first inputs mixers are connected to the directional couplers additional terminals, by the second inputs are connected to the circulators third terminals, and by the outputs are to the computing unit. In addition, the device comprises four directional couplers, filter and three mixers, at that, the third and fourth directional couplers are built-in between the generators and the first and second directional couplers inputs, and the additional terminals are connected to the third mixer inputs, the fifth and sixth directional couplers are included between the circulators third terminals and the first and second mixers inputs, and their additional terminals are connected to the fourth mixer inputs, the third mixer output is connected directly to the fifth mixer first input, and the fourth mixer output is connected to the fifth mixer second input via the filter, and its output is connected to the computing unit.

EFFECT: increase in the measurement accuracy.

1 cl, 3 dwg