A window panel having an antenna, wherein the antenna comprises: a radiating element; a ground plane element; and a transmission line extending across at least a portion of the radiating element and the ground plane element, the transmission line comprising: a dielectric layer (104B, 144), the dielectric layer having a portion of a first surface adjacent to the ground plane element and a second major surface opposite and separated from the first surface; a shield formed on the second major surface; a via extending through the dielectric layer to connect the shield to the ground plane element; a feed line extending longitudinally through the dielectric layer from a feed point at a proximal end of the transmission line towards a distal end of the transmission line, the feed line being shielded along a portion of a length of the feed line that extends across the ground plane element by the shield with the distal end of the transmission line being conductively connected with the radiating element through a microstrip via and coupling the feed line to the radiating element; wherein the radiating element and the ground plane element define a slot therebetween; and wherein the radiating element and the ground plane element further define an aperture and a tapered channel connected by the slot therebetween, wherein an outer shape of the radiating element and the ground plane element preferably comprises a rectangle; wherein the window panel comprises: a first glass layer and a second glass layer; wherein the antenna is incorporated between the first glass layer and the second glass layer with the transmission line extending from between the first glass layer and the second glass layer for connecting the antenna to a communications module. a radiating element; a ground plane element; and a transmission line extending across at least a portion of the radiating element and the ground plane element, the transmission line comprising: a dielectric layer (104B, 144), the dielectric layer having a portion of a first surface adjacent to the ground plane element and a second major surface opposite and separated from the first surface; a shield formed on the second major surface; a via extending through the dielectric layer to connect the shield to the ground plane element; a feed line extending longitudinally through the dielectric layer from a feed point at a proximal end of the transmission line towards a distal end of the transmission line, the feed line being shielded along a portion of a length of the feed line that extends across the ground plane element by the shield with the distal end of the transmission line being conductively connected with the radiating element through a microstrip via and coupling the feed line to the radiating element; wherein the radiating element and the ground plane element define a slot therebetween; and wherein the radiating element and the ground plane element further define an aperture and a tapered channel connected by the slot therebetween, wherein an outer shape of the radiating element and the ground plane element preferably comprises a rectangle; a dielectric layer (104B, 144), the dielectric layer having a portion of a first surface adjacent to the ground plane element and a second major surface opposite and separated from the first surface; a shield formed on the second major surface; a via extending through the dielectric layer to connect the shield to the ground plane element; a feed line extending longitudinally through the dielectric layer from a feed point at a proximal end of the transmission line towards a distal end of the transmission line, the feed line being shielded along a portion of a length of the feed line that extends across the ground plane element by the shield with the distal end of the transmission line being conductively connected with the radiating element through a microstrip via and coupling the feed line to the radiating element; wherein the radiating element and the ground plane element define a slot therebetween; and wherein the radiating element and the ground plane element further define an aperture and a tapered channel connected by the slot therebetween, wherein an outer shape of the radiating element and the ground plane element preferably comprises a rectangle; a first glass layer and a second glass layer; wherein the antenna is incorporated between the first glass layer and the second glass layer with the transmission line extending from between the first glass layer and the second glass layer for connecting the antenna to a communications module.