A waveguide antenna array

A method of forming a waveguide antenna array comprising:

• forming a first waveguide antenna having periodic perturbations along a longitudinal axis of the first waveguide antenna, wherein each perturbation period of the first waveguide antenna comprises a first waveguide section and a first perturbed section;
• and
• forming a second waveguide antenna having periodic perturbations along a longitudinal axis of the second waveguide antenna, wherein each perturbation period of the second waveguide antenna comprises a second waveguide section and a second perturbed section,
• whereby a pitch between the first and second waveguide antenna is formed to be equal or less than half an operating wavelength of an optical signal to be received by the waveguide antenna array,
• whereby a width of the first waveguide section is formed to be different from a width of the second waveguide section, and
• whereby the perturbation period of the first waveguide antenna is determined to be different from the perturbation period of the second waveguide antenna.

An optical phased array system comprising:

• a plurality of waveguide antenna arrays, each waveguide antenna array comprising:
• a first waveguide antenna having periodic perturbations along a longitudinal axis of the first waveguide antenna, wherein each perturbation period of the first waveguide antenna comprises a first waveguide section and a first perturbed section;
• and
• a second waveguide antenna having periodic perturbations along a longitudinal axis of the second waveguide antenna, wherein each perturbation period of the second waveguide antenna comprises a second waveguide section and a second perturbed section,
• whereby a pitch between the first and second waveguide antenna is equal or less than half an operating wavelength of an optical signal to be received by the waveguide antenna array,
• whereby a width of the first waveguide section is different from a width of the second waveguide section, and
• whereby the perturbation period of the first waveguide antenna is different from the perturbation period of the second waveguide antenna.