Signal transmitter and methods for transmitting signals from animals
Injectable transmitters are provided that can include a body with the body housing a power source and an oscillator, the injectable transmitter also including an antenna extending from the body, the body and antenna being of sufficient size to be injected through a 9 gauge needle. Radio frequency transmitters are provided that can include a body extending from a nose to a tail with the body housing a power source and RF signal generator components. The power source of the transmitter can define at least a portion of the nose of the body. The transmitters can have an antenna extending from the tail. Methods for attaching a radio frequency (RF) transmitter to an animal are provided. The methods can include providing an RF transmitter and providing an injection device having a needle of gauge of 9 or smaller; providing the RF transmitter into the injection device; and providing the RF transmitter through the 9 gauge or smaller needle and into the animal.
1. A radio frequency transmitter comprising:
a body extending from a nose to a tail, the body housing a cylindrical battery and RF signal generator components, the cylindrical battery defining at least a portion of the nose of the body, and having a capacity of 6 mAh and being less than 6 mm long; and
an antenna extending from the tail.
2. The radio frequency transmitter of claim 1 wherein the battery comprises a Li/CFx micro-battery comprising a lithium metal anode and a carbon fluoride cathode.
3. The radio frequency transmitter of claim 1 wherein the antenna comprises Teflon PFA (perfluoroalkoxy)-coated stainless steel wire.
4. The radio frequency transmitter of claim 1 wherein the antenna defines a diameter of less than 38.1 μm and a length of less than 17.8 cm.
5. The radio frequency transmitter of claim 1 wherein the circular battery defines a diameter of less than 2.95 mm in at least one cross section.
6. The radio frequency transmitter of claim 1 wherein the circular battery defines a diameter of less than 12 mm in length.