Article

Subwavelength Planar Leaky-Wave Components with Metamaterial Bilayers

Departmental Papers (ESE) DOI:ese_papers/233
Source: OAI

ABSTRACT The potential use of metamaterial planar bilayers for synthesizing compact subwavelength leaky-wave radiators in the microwave regime is analyzed in detail. In particular, the possibility of pairing "complementary" metamaterials in order to reduce the dimensions of microwave components is explored for the leaky-wave operation of an open waveguide consisting of a grounded pair of planar layers. In connection with our similar findings in other setups employing such complementary pairings, here we show how the compact resonance at the interface between "negative" and "positive" materials may also be properly exploited in this context. Choosing materials with low constitutive parameters, moreover, shows to be effective for enhancing the directivity of these components. We explore in detail the notable guidance and radiation properties of the anomalous natural modes supported by these bilayered structures, giving some physical insights into the anomalous phenomenon and considering the possible limitations in some realistic setups.

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Keywords

bilayered structures
 
Choosing materials
 
compact resonance
 
complementary pairings
 
grounded pair
 
metamaterial planar bilayers
 
metamaterials
 
microwave regime
 
notable guidance
 
open waveguide
 
pairing
 
planar layers
 
positive
 
potential use
 
radiation properties
 
realistic setups
 
setups
 
synthesizing compact subwavelength leaky-wave radiators