This paper presents a comparison of two gain-enhancement techniques and the development of an extremely high-gain slotted waveguide antenna array (SWAA) aiming at applications in the millimeter-waves (mm-waves). The first technique utilizes pairs of grooved structures surrounding a given primary power source to improve its transmission properties. acting as secondary sources to re-rad... https://cosmeticssquadets.shop/product-category/lice-egg-remover/