These antenna products connect to Radio Frequency Modules (RFM) and reader/writers to form the interface to the low frequency (LF) 134.2 kHz Texas Instruments transponders. In combination with a reader/writer they transmit energy and signals to the transponder and receive the response from the tag. There are three standard gate antennas (small, medium and large), two standard stick antennas with 1 or 3 meter cable length and a stick antenna specially designed for use with the Mini-RFM available for usage in low frequency systems. Each antenna is capable of creating a specific size and shape of read zone to meet the requirements of the target application. In general the gate antennas create a large read zone including greater read distance, while the stick antennas provide a more focused read zone and an ability to discriminate between transponders.