Abstract
A novel polarization rotator of arbitrary angle was proposed and realized based on simple slot arrays. To achieve the rotation of an arbitrary angle α, the slots on the first layer have to be at an angle of α to the slots on the second layer. Consequently, 90° rotation can be realized using two perpendicularly oriented slot arrays, which overturns the conventional notion of that perpendicular slot arrays are not possible to pass electromagnetic wave. In addition, such structure provides the same bandwidth comparing to its counterpart utilized for frequency selective surface (FSS). Furthermore, such structure is much easier to be fabricated compared to the substrate integrated waveguide (SIW) array. Moreover, low insertion loss can be achieved based on metallic material.
Highlights
Quasi-optical (QO) system has been widely employed in many radio astronomy telescopes,[1] deep-space detection missions,[2] and remote sensing polarimetric imaging or radiometers.[3,4,5] In these QO systems, polarization rotation components are usually required to achieve multi-polarization receiving or polarization separation
Such structure provides the same bandwidth comparing to its counterpart utilized for frequency selective surface (FSS)
Such structure is much easier to be fabricated compared to the substrate integrated waveguide (SIW) array
Summary
Quasi-optical (QO) system has been widely employed in many radio astronomy telescopes,[1] deep-space detection missions,[2] and remote sensing polarimetric imaging or radiometers.[3,4,5] In these QO systems, polarization rotation components are usually required to achieve multi-polarization receiving or polarization separation. A novel polarization rotator of arbitrary angle was proposed and realized based on simple slot arrays. To achieve an insertion loss of 0.5-1.3 dB Faraday rotator, very complicated structure may be needed.[13]
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