Macdonald, Dettwiler and Associates Corporation

Ems Technologies Canada, Limited

Yan Brand

Philippe Loiselle

Yves Gaudette

Eric Amyotte

Virgine Dupessey

Santiago Sierra-Garcia

A matched horn coupler assembly is used in a RF rotational joint for conveying an electromagnetic signal. The coupler assembly includes first and second feed horns defining respective first and second horn longitudinal axes intersecting one another at an intersection point. The first and second feed horns connect to a mirror for conveying the signal there between with the intersection point lying on a reflecting surface of the mirror which defines a normal direction thereof at the intersection point. The normal direction is equally angularly spaced from both the first and second horn longitudinal axes. First and second lenses connect to the respective first and second feed horns and focus the signal there between and at the intersection point. At least one of the first and second feed horns is rotatably connected relative to the mirror about the respective horn longitudinal axis.

RF rotary joint using a matched horn coupler assembly

An electromagnetic bandgap device is mountable on a RF disturbing structure of an antenna to minimize signal field disturbance imparted thereby. The RF disturbing structure is oriented in a direction substantially parallel to a path of travel of an antenna signal and located within a field covered by the signal transmitted by a feed. The bandgap device comprises a plurality of RF perturbing elements connected to the RF disturbing structure and spaced apart from one another in the direction substantially parallel to the signal path. The perturbing elements are positioned, configured and sized to direct a disturbed portion of the signal away therefrom to reduce field disturbance generated by the disturbed signal portion interacting with an undisturbed portion of the antenna signal.

Electromagnetic bandgap device for antenna structures

A method for improving the electric isolation of a wide coverage antenna mounted on a structure. The structure defines a peripheral wall and a first end wall and the elongated antenna has a base. The antenna pivotally mounts on the structure about a mounting axis parallel to the structure axis, in a spaced apart relationship relative to the peripheral wall in a direction pointing generally outwardly therefrom with the antenna base and at least part of an antenna body being in a step back relationship relative to the first end wall such that the antenna is at least partially electrically isolated by the structure while being substantially hidden from the first end wall. A second antenna similarly pivotally positioned relative to the peripheral wall can be generally opposed to the first antenna about the structure such that the two antennas are at least partially electrically isolated from one another.

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Ile Bizard, Canada

Yan Brand