초록 ▼

A low cost, compact, electronically scanned millimeter wave (MMW) lens enables the projection of a highly directional beam of Ka band millimeter wave (MMW) electromagnetic energy, while eliminating the need for mechanical movement of the lens. The present invention allows for the economical producti

A low cost, compact, electronically scanned millimeter wave (MMW) lens enables the projection of a highly directional beam of Ka band millimeter wave (MMW) electromagnetic energy, while eliminating the need for mechanical movement of the lens. The present invention allows for the economical production and operation of the lens in the Ka and higher frequency ranges by exploiting waveguide technology. The waveguides of the present invention are tapered longitudinally resulting in a wider portion of the waveguide in electromagnetic communication with an interior cavity of the lens. The waveguide taper improves impedance matching between the waveguides and the lens cavity. The waveguides also include symmetric power dividers, located longitudinally within the waveguide aperture, ensuring port widths below .lambda..sub.g /2, thus, reducing or eliminating unwanted mode components which reduces sidelobe energy. This results in a low loss, low sidelobe steerable beam of MMW energy.

대표청구항 ▼

[ Therefore, the following is claimed:] [1.] An electronically scanned lens for directing millimeter wave (MMW) energy, comprising;a first curvilinear wall having a plurality of metalized rectangular MMW beam waveguides radially dispersed thereabout, said metalized rectangular MMW beam waveguides ha

[ Therefore, the following is claimed:] [1.] An electronically scanned lens for directing millimeter wave (MMW) energy, comprising;a first curvilinear wall having a plurality of metalized rectangular MMW beam waveguides radially dispersed thereabout, said metalized rectangular MMW beam waveguides having an interior end and an exterior end;a second curvilinear wall, opposing said first curvilinear wall, having a plurality of metalized rectangular MMW array waveguides radially dispersed thereabout, said metalized rectangular MMW array waveguides having an interior end and an exterior end; anda plurality of sidewalls connecting said first curvilinear wall and said second curvilinear wall, forming a specially shaped cavity recessed between said first curvilinear wall and said second curvilinear wall, around which said plurality of metalized rectangular MMW beam waveguides and said plurality of metalized rectangular MMW array waveguides are radially dispursed, said interior ends of said plurality of metalized rectangular MMW beam waveguides and said interior ends of said plurality of metalized rectangular MMW array waveguides in electromagnetic communication with a boundary edge of said specially shaped cavity, said specially shaped cavity designed to directionally radiate MMW electromagnetic energy from said plurality of metalized rectangular MMW beam waveguides on said first curvilinear wall to said plurality of metalized rectangular MMW array waveguides on said second curvilinear wall, said plurality of metalized rectangular MMW beam waveguides and said plurality of metalized rectangular MMW array waveguides disposed about the periphery of said specially shaped cavity in order to affect the directional radiation of MMW energy.