RADIO-TRANSPARENT SPINNER OF NAVIGATION ANTENNA OF HELICOPTER SYSTEM Russian patent published in 2023 - IPC H01Q1/42 F41H1/04 F41H5/04 

FIELD: aviation.

SUBSTANCE: invention relates to antenna-feeder devices, mostly to antenna spinners of navigation systems of a helicopter and other low-speed aircrafts. A radio-transparent spinner of a navigation antenna of a helicopter system differs in that a spinner wall with a thickness of 1.0-2.5 mm is made of two prepreg layers based on quartz fabric with dielectric permeability of ε = 2.0-4.0, between which a glass mesh is placed, a thread thickness of which is equal to 0.5-1.5 mm, and a cell size is normalized to half a wavelength of an antenna operating range, and glass honeycomb is connected to an inner surface of the wall in a direction from a base to a top of the spinner, a thickness and a height of which are selected taking into account provision of optimal radio engineering characteristics and rigidity of the spinner.

EFFECT: provision of the minimal distortion of a directional diagram of an antenna device within obtainment of the maximal passage coefficient and the minimal level of side DD petals, as well as requirements for strength and rigidity.

1 cl, 3 dwg