A communication arrangement comprising: a wireless communications terminal, the wireless communications terminal comprising an internal patch antenna including a ground plane and a patch radiator disposed in a substantially parallel relationship with the ground plane, the internal patch antenna being configured to produce a radiation beam of a predetermined beamwidth; and a reflector arrangement configured for attachment to the wireless communications terminal, the reflector arrangement being configured, when attached to the terminal, to produce a radiation beam of reduced beamwidth relative to said predetermined beamwidth, wherein the reflector arrangement comprises: a main reflector; a sub-reflector for reflecting radiation towards the main reflector; and a dielectric ring disposed around the perimeter of the sub-reflector, the dielectric ring extending radially outwards from the perimeter of the subreflector by a distance of between one eighth and one half of a wavelength at an operating frequency of the antenna, wherein at least some sectors of the dielectric ring have a greater thickness adjacent to the inner circumference of the dielectric ring than adjacent to the outer circumference of the dielectric ring, wherein the reflector arrangement is configured such that, when attached to the terminal, the internal patch antenna acts as a feed antenna for the subreflector without the use of additional coupling antennas between the feed antenna and the sub-reflector, and wherein the sub-reflector is arranged to collect the radiation directly from the internal patch antenna and to reflect the beam towards the main reflector such that the main reflector produces the radiated beam of reduced beamwidth. a wireless communications terminal, the wireless communications terminal comprising an internal patch antenna including a ground plane and a patch radiator disposed in a substantially parallel relationship with the ground plane, the internal patch antenna being configured to produce a radiation beam of a predetermined beamwidth; and a reflector arrangement configured for attachment to the wireless communications terminal, the reflector arrangement being configured, when attached to the terminal, to produce a radiation beam of reduced beamwidth relative to said predetermined beamwidth, wherein the reflector arrangement comprises: a main reflector; a sub-reflector for reflecting radiation towards the main reflector; and a dielectric ring disposed around the perimeter of the sub-reflector, the dielectric ring extending radially outwards from the perimeter of the subreflector by a distance of between one eighth and one half of a wavelength at an operating frequency of the antenna, wherein at least some sectors of the dielectric ring have a greater thickness adjacent to the inner circumference of the dielectric ring than adjacent to the outer circumference of the dielectric ring, wherein the reflector arrangement is configured such that, when attached to the terminal, the internal patch antenna acts as a feed antenna for the subreflector without the use of additional coupling antennas between the feed antenna and the sub-reflector, and wherein the sub-reflector is arranged to collect the radiation directly from the internal patch antenna and to reflect the beam towards the main reflector such that the main reflector produces the radiated beam of reduced beamwidth. a main reflector; a sub-reflector for reflecting radiation towards the main reflector; and a dielectric ring disposed around the perimeter of the sub-reflector, the dielectric ring extending radially outwards from the perimeter of the subreflector by a distance of between one eighth and one half of a wavelength at an operating frequency of the antenna, wherein at least some sectors of the dielectric ring have a greater thickness adjacent to the inner circumference of the dielectric ring than adjacent to the outer circumference of the dielectric ring, wherein the reflector arrangement is configured such that, when attached to the terminal, the internal patch antenna acts as a feed antenna for the subreflector without the use of additional coupling antennas between the feed antenna and the sub-reflector, and wherein the sub-reflector is arranged to collect the radiation directly from the internal patch antenna and to reflect the beam towards the main reflector such that the main reflector produces the radiated beam of reduced beamwidth.