Antenna design using a high index, low loss material

A direction finder device for use with radio or microwave frequency radiation including a predetermined frequency of interest, said device comprising:

• first and second receiving elements each operatively coupled to radiation at said predetermined frequency of interest;
• and
• one or more layers of a transmission medium having dielectric and magnetic loss tangents each substantially less than 0.3 and matched values of relative permittivity and relative permeability substantially greater than 10 for said predetermined frequency of interest, said transmission medium surrounding said first receiving element and oriented with respect to the first receiving element such that substantially all of the radiation coupled to the receiving element from a remote source is propagated through the transmission medium in a propagation direction which is perpendicular to an interface surface between the transmission medium and the surrounding air or free space, said interface surface being separated from said first receiving element along said propagation direction by a propagation distance which is a function of the angular orientation of said source relative to said first receiving element.

A polarizer usable at a predetermined frequency of interest, said polarizer comprising a stacked array of multi-layer meander-line polarizer plates, each plate consisting of a conductive surface defining a plurality of meander-lines and a layer of a transmission medium, wherein said transmission medium has dielectric and magnetic loss tangents each substantially less than 0.3 and matched values of relative permittivity and permeability substantially greater than 10 for said predetermined frequency of interest.