Effect of back-plane distance on mutual coupling between CPW-FED slots on conductor-backed two-layer substrates

Self and mutual admittance of CPW‐FED slots on conductor‐backed two‐layer substrate

“…This was true even though the substrate of Figure 1 was of lesser electrical height-potentially an advantage at microwave frequencies. The effect of back plane distance on the mutual coupling between broadside twin CPW-fed slots on conductorbacked two-layer substrates with an air bottom layer was investigated in [3]. Distances of o /6 and o /4 yielded significantly increased mutual coupling over the case of no back plane.…”

“…For approaching the limitation of Shannon theoretical capacity and reducing correlation in different channels, polarization and pattern diversities are proposed to seek for higher data rate. Many simulations and experiments [1][2][3][4] results demonstrated the capacity of MIMO system can be enhanced by using distinct polarizations and radiation patterns diversity, especially the polarizations. Since the wireless channels are time variant, the polarization and radiation pattern scheme should be updated in real Computed and measured mutual admittance Y 12 against frequency of CPW-fed twin slots on conductor-backed two-layer substrate.…”

Design of Non-Uniformly Excited Linear Slot Arrays Fed by Coplanar Waveguide

“…This implies a change in internal coupling (i.e., coupling on the dielectric side) due to the presence of the back plane. Thus, the appropriate parallel-plate two-layer Green's function would be needed in order to account for mutual coupling with sufficient accuracy in an iterative array design procedure (Jacobs et al, 2005). Assuming infinite top and bottom conducting planes and dielectric layers with dielectric constants r1 = 3.38 and r2 = 1, with the top substrate layer height h 1 = 0.813 mm, simulations were carried out at 10 GHz to demonstrate the effect of back plane height on mutual coupling between the twin slots of Fig.…”

“…Assuming infinite top and bottom conducting planes and dielectric layers with dielectric constants r1 = 3.38 and r2 = 1, with the top substrate layer height h 1 = 0.813 mm, simulations were carried out at 10 GHz to demonstrate the effect of back plane height on mutual coupling between the twin slots of Fig. 10 (Jacobs et al, 2005). Three values of bottom layer height, or back plane distance, were considered, namely h 2 = , λ o /4, and λ o /6 (at 10 GHz, λ o /4 = 7.5 mm and λ o /6 = 5 mm).…”

Fast and efficient calculation of mutual admittance between coplanar waveguide-fed slots on electrically thin substrates

“…On the other hand, the design of nonuniform arrays subject to rigorous sidelobe-level specifications generally requires explicit, accurate accounts of the mutual coupling between all possible slot pairs in the array. While the moment method has been applied outside of an array context toward finding the mutual coupling between planar slot elements such as CPW-fed slots on multilayer dielectric substrates [11] and CPW-fed slots on conductor-backed two-layer substrates [12,13], such techniques might become impractically cumbersome when viewed from the perspective of computationally intensive iterative array design algorithms that require the mutual admittance between all possible slot pairs in the array to be computed during every iteration. This is recognized in Ref.…”