module 40 the plastic rivets 30 are heat staked to complete the fastening antenna 10 is pre formed to snugly fit the contour of part of the outer surface of the rf retrofit module 40 as shown in fig2 in the same fashion the complementary pre formed antenna 20 is attached to another part of the outer surface of the rf retrofit module 40 antenna 10 is coupled to the transceiver assembly 70 via coaxial cable 50 coaxial cable 50 is soldered to the transceiver assembly 70 at a transceiver coupling point the other end of coaxial cable 50 is soldered to antenna 10 as per the detail a in fig3 at points 130 in the same fashion antenna 20 is coupled to the transceiver assembly 70 via coaxial cable 60 the fully assembled rf retrofit module 40 is fastened to meter 100 by conventional means like screws or snap friction fit and enclosed by the cover 90 the rf radiation reception pattern of antenna 10 is perturbed to some degree when incorporated into the meter 100 accordingly in the preferred embodiment two slot antennas 10 and 20 are used and are placed offset from the center of the outer surface of the retrofit.