Patent ID: 7636620

Claim:
A signal distribution device for a glide guidance component of an instrumental landing system (ILS), including an array of antenna elements installed on a pylon placed on a supporting surface (GR), the device comprising: a first and a second input for receiving a CSB (carrier plus sideband) input signal and an SBO (sideband only) input signal respectively, a plurality of outputs connectable to the array and including a first and a second output for a first and a second output signals, respectively, each of said output signals including a CSB component and an SBO component, means for phase shifting and for distributing the SBO and CSB input signals over the plurality of outputs, wherein the array is of the image-less type configured to produce CSB and SBO signal radiation patterns that are substantially independent of reflection from the supporting surface, wherein CSB components of the first and the second output signals have substantially the same amplitude values as each other, and wherein SBO components of the first and second output signals have substantially the same amplitude values as each other, and a difference between the phases of the respective CSB components that have substantially the same amplitude values as each other is substantially equal to a difference between the phases of the respective SBO components that have substantially the same amplitude values as each other.