Cambium Networks Limited

Adam Wilkins

Paul Clark

Carl Morrell

Nigel Jonathan Richard King

Peter Strong

Nigel King

Peter Spence

A dual polarised edge coupled patch antenna element includes a patch radiator () and a ground plane (), the ground plane being disposed in a substantially parallel relationship with the patch radiator (). A first feed track () is connected at a first feed position on a first edge of the patch radiator and a second feed track () is connected at a second feed position on a second edge of the patch radiator, the second edge being at a right angle to the first edge. The first feed position is offset from the centre of the first edge and the second feed position is offset from the centre of the second edge, and the first feed position and the second feed position are each offset in a respective direction away from a corner between the first side and the second side.

Patch antenna

A radio frequency transmission arrangement comprises a ground plate having an aperture comprising a slot with an elongate cross-section and substantially parallel sides, and a first and second transmission line. The thickness of the ground plate is greater than a width of the slot. The aperture is partially filled with a solid dielectric material and partially filled with air. The first transmission line comprises a first elongate conductor on a first side of the ground plate and has an end terminated with a first termination stub. The second transmission line comprises a second elongate conductor on the opposite side of the ground plate and has an end terminated with a second termination stub. The first transmission line is arranged to cross the slot at a point adjacent to the first termination stub, and the second transmission line is arranged to cross the slot at a point adjacent to the second termination stub.

Radio frequency connection arrangement

A radio frequency transmission arrangement comprises a ground plate having an aperture comprising a slot with an elongate cross-section and substantially parallel sides, and a first and second transmission line. The thickness of the ground plate is greater than a width of the slot. The first transmission line comprises a first elongate conductor on a first side of the ground plate and has an end terminated with a first termination stub. The second transmission line comprises a second elongate conductor on the opposite side of the ground plate and has an end terminated with a second termination stub. The first transmission line is arranged to cross the slot at a point adjacent to the first termination stub, and the second transmission line is arranged to cross the slot at a point adjacent to the second termination stub.

An antenna array assembly comprises a dielectric film () carrying an array of conductive patch radiator elements () and a plurality of conductive feed tracks and a ground plate (), a face of the ground plate () having a contoured shape comprising a first part configured to be in contact with the dielectric film (), and a second part comprising sunken sections with respect to the first part arranged to underlie the conductive feed tracks and conductive patch radiator elements (), and the ground plate having locating protrusions () protruding from the first part. The dielectric film is attached to the ground plate by location of holes in the dielectric film with the locating protrusions () such that the dielectric film is held under tension to maintain spacing of the dielectric film () from the sunken sections of the ground plate () without the use of a dielectric spacer layer between the dielectric film () and the ground plate ().

Antenna array assembly and method of construction thereof

An antenna array assembly comprises at least a first and second antenna element, each comprising at least one radiator element in a substantially parallel relationship to a respective ground plate, and an isolator bar disposed between the respective ground plates of the first and second antenna elements, the isolator bar being elongate having a cross-section comprising a T shape, the cross-section being across a long axis. The isolator bar comprises a support bar in contact with the ground plates forming the stem of the T shape, and a cross piece forming the top of the T shape. The cross piece of the isolator bar has a width in the cross-section of at least a quarter of a wavelength at an operating frequency of the antenna array, whereby to provide radio frequency isolation between the first and second antenna elements.

Antenna array assembly

A radio frequency transmission arrangement comprises a ground plate () having first and second opposite sides and a boss protruding from said second side of the ground plate (), a first transmission line comprising a first elongate conductor () passing from the first side of the ground plate through an aperture () in the ground plate and the boss, and a second transmission line comprising a second elongate conductor () and a ground plane (), the first elongate conductor () passing through the ground plane () to connect to the second elongate conductor. The boss has an end surface () disposed in a substantially parallel relationship with the ground plane () of the second transmission line, and there is a gap between the end surface of the boss and the ground plane.

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Plymouth, United Kingdom

Adam Wilkins