On the technology of making chiral and bianisotropic waveguides for microwave propagation

Abstract

Chiral and bianisotroDic waveguides described in this arti-materials, suitable for chiral and bianisotropic waveguide structures. Fabrication of such waveguides can actually be achieved by using modern planar technology. ABSTRACTWe introduce an idea for a n o d class of urtificiul materiuls suitable for chiral and bianisotropic waueguide structures. Fabrication of such waoeguides cun be uchieued using modem planar technology. Chiral and bianisotropic waveguides described in this article are based on a composition of magnetostatic waue (MSW) resonutors. Becuuse of the smull sizes of MSW resonators the concentration of lhe particles may be uety high. The resonance frequency of MS W resonators may be tuned cia a bias magnelic field. Therefore, we can deuelop a method of uchieuing chiraliiy control. 0

Tellegen particles and magnetoelectric metamaterials

“…A concept of such a ME particle was put forth in 1996. 64 Then microwave experiments clearly verified the ME properties in such a structure. [21][22][23] Our present results give pictures for the field distributions in these ME particles.…”

Optical Tellegen metamaterial with spontaneous magnetization

“…The challenge to reach an isotropic Tellegen metamaterial is to produce a space-inhomogeneous external magnetization (i.e., each meta-atom should be magnetized externally) with a sufficiently strong field amplitude. This is a bottleneck of all the known microwave designs of Tellegen meta-atoms 14 – 17 . If the external magnetization is uniform in space, the bulk Tellegen effect would be fully compensated because magnetization in each meta-atom will be random with respect to its geometry.…”

“…Although each meta-atom has the Tellegen response, it vanishes for the metamaterial as a whole ( R χs = 0). This explains why despite that the design of individual Tellegen meta-atoms is known for a long time 14 – 17 , bulk Tellegen metamaterials based on them could not be proposed. However, the single-domain magnetic state in a meta-atom alone is not enough for the bulk Tellegen response.…”

Analysis of Cavity-Backed Antennas with Chiral Substrates and Superstrate Using the Finite Element Method

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