Experimental evaluation of the shading effect of accelerating lens in azimuth plane

When using an accelerating metal-lamellar cylindrical lens to increase the signal level towards the remote subscriber of the wireless access system, a shadowing effect can be exerted on users outside the main lobe of the radiation pattern of this lens. The report presents the results of an experimental study of the field structure in the azimuth directions, different from the axis of the lens, oriented to the priority subscriber. The characteristics of the developed and manufactured software-hardware model, including metal-lamellar lens; a device for generating a data packet and emitting a signal; set of receiving sensors; the necessary software for the collection and processing of results. The measurements carried out under typical conditions showed that the “shading” sector estimated by (signal + noise) / noise ratio for the lens starts at about 6° with respect to the lens axis and ends at 30°.

I. Previous Developments

Ensuring the quality of receiving signals that are carriers of information in wireless networks remains an urgent task. The decisive factor here is the power flux density provided by the radiating system at the location of the user's receiving equipment. In the customer service area, as a rule, there are many various chaotically located reflective elements of the situation, which creates a complex interference pattern of the field. Because of this, some subscribers may find themselves in the field of reduced field strength. In addition, situations are possible where one or more subscribers are located at a range greater than the radius of the guaranteed coverage provided by the wireless access point (AP).