Characteristics of symmetric planar slot antennas of axial radiation. the size of which is comparable with the radiation wavelength ( = 30 mm) having a linearly extending opening was studied. The same directional diagram investigated antennas have been theoretically calculated. experimentally measured and analyzed for Aperture angle of 30. https://www.diegojavierfares.com/special-offer-Salvation-Vinyl-LP-great-price/