A window assembly comprising: a substrate ; a transparent layer disposed on the substrate and defining an area having a periphery and with the transparent layer comprising a metal compound such that the transparent layer is electrically conductive; an outer region devoid of the transparent layer defined adjacent the transparent layer along the periphery ; a conductive element disposed on the substrate and comprising: a first portion overlapping the area of the transparent layer and abutting and being in direct electrical contact with the transparent layer ; and a second portion integrally extending from the first portion and disposed in the outer region such that the periphery delineates the first portion from the second portion , and wherein the second portion has an area defining an enclosed slot , and wherein the second portion comprises an edge wherein the edge defines a first groove and a second groove spaced apart from one another and being disposed on opposing sides of the enclosed slot ; and a feeding element coupled to the conductive element and being configured to energize the conductive element to implement the enclosed slot as a slot antenna ; and an energizing element coupled to the conductive element and being configured to energize the conductive element to implement the conductive element as a bus bar wherein the bus bar is configured to transfer energy to the transparent layer to heat the transparent layer . a substrate ; a transparent layer disposed on the substrate and defining an area having a periphery and with the transparent layer comprising a metal compound such that the transparent layer is electrically conductive; an outer region devoid of the transparent layer defined adjacent the transparent layer along the periphery ; a conductive element disposed on the substrate and comprising: a first portion overlapping the area of the transparent layer and abutting and being in direct electrical contact with the transparent layer ; and a second portion integrally extending from the first portion and disposed in the outer region such that the periphery delineates the first portion from the second portion , and wherein the second portion has an area defining an enclosed slot , and wherein the second portion comprises an edge wherein the edge defines a first groove and a second groove spaced apart from one another and being disposed on opposing sides of the enclosed slot ; and a first portion overlapping the area of the transparent layer and abutting and being in direct electrical contact with the transparent layer ; and a second portion integrally extending from the first portion and disposed in the outer region such that the periphery delineates the first portion from the second portion , and wherein the second portion has an area defining an enclosed slot , and wherein the second portion comprises an edge wherein the edge defines a first groove and a second groove spaced apart from one another and being disposed on opposing sides of the enclosed slot ; and a feeding element coupled to the conductive element and being configured to energize the conductive element to implement the enclosed slot as a slot antenna ; and an energizing element coupled to the conductive element and being configured to energize the conductive element to implement the conductive element as a bus bar wherein the bus bar is configured to transfer energy to the transparent layer to heat the transparent layer . <EOS>