radiating antenna element 64 an example of this antenna with a height 71 of 1 17 inches performed well at gps frequencies of about 1 5 ghz fig7 shows an example of the monopole antenna described above with an amplifier 72 inserted between the center conductor 14 of the coaxial cable 50 and the radiating antenna element 64 for receiving antennas the input of the amplifier 72 is connected to the radiating antenna element 64 and the output of the amplifier 72 is connected to the center conductor 14 of the coaxial cable 50 for transmitting antennas the output of the amplifier 72 is connected to the radiating antenna element 64 and the input of the amplifier 72 is connected to the center conductor 14 of the coaxial cable 50 fig8 a 8 b and 8 c shows an example of an l shaped antenna having a radiating antenna element 80 over a ground plane 98 the radiating antenna element 80 and the ground plane 98 are formed of conductive loaded resin based materials a layer of insulating material 96 separates the radiating antenna element 64 from the ground plane 98 the radiating antenna element 80 is made up of a first leg 82 and a second leg 84 fig8 a shows a top view of the antenna fig8 b shows a cross section of the first leg 82 fig8 c shows a cross section of the second leg 84 fig8 b and 8c show the ground plane 98 and the layer of insulating.