Experimental Validation of a Bespoke Lens for a Slot Log-Spiral Feed

• In this letter, we experimentally validate the concept of bespoke lenses for the specific design of a log-spiral feed. Bespoke lenses are designed using the concept of quasi-conformal transformation optics (QCTO) to enhance the radiation properties for a given feeding. Our experimental results demonstrate that the antenna with its bespoke lens has higher gain, lower cross polarization, lower sidelobes, and lower axial ratio than that with a conventional hyperhemispherical lens.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Telekommunikation (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Telecommunications (hsv//eng)

Nyckelord

Bespoke lenses

graded-index lens

quasi-conformal transformation

slot log-spiral feed

transformation optics (TO)

Conformal mapping

Lens antennas

Axial ratio

Conformal transformation

Cross polarizations

Experimental validations

Radiation properties

Side lobes

Antenna feeders

Publikations- och innehållstyp

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