Reflector arrangement for attachment to a wireless communications terminal

A communication arrangement comprising:

• a wireless communications terminal, the wireless communications terminal comprising an internal patch antenna including a patch radiator disposed in a parallel relationship with a 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 having a symmetric portion and an asymmetric portion, the symmetric portion being generally bowl-shaped and rotationally symmetric about an axis of the main reflector, and the asymmetric portion being shaped to accommodate a housing of the wireless communications terminal;
• and
• a sub-reflector for reflecting radiation towards the main reflector, the sub-reflector comprising a reflective surface, at least a first section of the reflective surface being conical and having an apex, and the reflector arrangement being configured such that, when attached to the terminal, the apex extends towards the internal patch antenna, wherein the reflective surface of the sub-reflector comprises a further section surrounding said first section, the further section being shaped as a truncated cone having a substantially shared axis with said first section, the truncated cone subtending a greater angle to the shared axis than an angle subtended to the shared axis by said first section, and
• wherein the reflector arrangement is configured such that, when attached to the terminal, the internal patch antenna is positioned in an aperture of the main reflector to act as a feed antenna for the sub-reflector without the use of additional coupling antennas between the internal patch 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.