Creating and sharing knowledge for telecommunications

Photonic beamforming system for a phased array antenna receiver

Drummond, M. V. ; Nogueira, R.N. ; Duarte , V. C.

Instituto de Telecomunicações

Invention Title: Photonic beamforming system for a phased array antenna receiver

Patent Nr.: EP16723164

Type: Patent

Regional Coverage: EPO

Grant Status: Granted

Priority Date: 20-04-2015

Filing Date: 16-03-2017

Granting Date: 07-03-2018

It is an object of the present invention a photonic system to perform beamforming of a radio signal received by a phased array antenna with N antenna elements. It provides true-time delay beamforming enabled by tunable optical delay lines (6) with a periodic frequency response. The present invention provides four key advantages: photonic RF phase shifting; highly-sensitive coherent detection with intrinsic photonic frequency downconversion; phase noise cancellation, since a frequency-shifted optical local oscillator can be derived from a same laser source (1) used to feed electro-optic modulators (5); and the possibility of only requiring a single delay line, shared amongst all tunable optical delay lines. Such set of advantages makes the proposed system extremely attractive for high-end wireless receivers, required for demanding applications such as satellite communication systems and broadband wireless signal transmission.