The article provides an overview of the web traffic filtering system using Linux-based Squid software package. allows you to limit users on Internet and collect statistics without interfering with user’s computer, including browser.

In this communication, a compact, highly integrated multiplexing filtering antenna operating at 4.7/5.2/6.0/6.6 GHz is proposed for the first time. Different from traditional antennas, has one shared radiator but four ports working in different frequency bands, and thus, it can simultaneously support transmission channels. The composed of patch with U-shaped slot, two substrate waveguide (SIW) ...