1. Previous Developments
Unlike the previous work of the authors [1], which addressed the issue of increasing the access range for an individual subscriber of the IEEE 802.11 system at the cost of using a metal-lamellar cylindrical lens with a single-channel equipment wireless access point. The paper examines the possibility of using the aforementioned type of lenses for the MIMO systems with two (or more) antennas. This raises the problem of choosing the parameters of the lens, which would allow increasing characteristics of information accessibility in both channels, whose antennas are cross-separated and in absolute sense, cannot be located in the focus of the lens. Solution of this problem can be achieved in two ways:
By the increase in the lens focal distance so that to ensure (with a margin) meeting the terms of location of the irradiated lens surface in the far field of the system of two emitters.
By modification of the lens profile so that to satisfy (as a first approximation) the requirement of the same positions of radiation patterns (RP) formed when using the emitters shifted both to the left and to the right from the lens phase center.