Abstract: A wireless communication method to alter RF regulatory channel hopping requirements (regulations) between a pair of transceivers is envisioned wherein an embedded transceiver embedded in an RF attenuating medium transmits signals at a lower hopping requirement than a paired open-air transceiver. The communication method adheres to these regulations, which define a threshold power for transmission above which require a high degree of frequency hopping. Because the attenuating medium attenuates the open-air RF signal from the embedded transceiver, channel hopping in the embedded transceiver is lowered however, the channel hopping in the open-air transceiver is not lowered. The two transceivers are essentially powered equally.

Abstract: A variable tuning transceiver sealed in a protective housing, such as a bolus, is adjusted to transmit a near optimally tuned signal at a select frequency while in vivo in an animal. More specifically, the variable tuning transceiver provides a plurality of incident power transmissions over an antenna at a plurality of corresponding different capacitance levels as defined by a variable tuning circuit in the transceiver. A detector circuit, also in the transceiver, detects reflected power for each of the incident power transmissions conditioned at each capacitance level which is affected by the dielectric constant in the animal and any mismatches in the antenna. Each reflected power can then be stored in nontransient memory in the transceiver whereby the microprocessor, also in the transceiver, can select the capacitance level with the lowest reflected power found and therefore the strongest external signal from the capacitance levels sampled.

Abstract: A bolus that communicates with an external transceiver by way of radio waves produced by an electrically small H-antenna is described. The electrically small H-antenna is connected to a conductive cylindrical antenna that houses a battery and chipset that includes a transceiver, identification information and at least one sensor. The H-antenna and the conductive cylindrical antenna are arranged so that electrical currents that produce the radio waves are essentially always aligned to work together. The bolus is essentially a hermetically sealed capsule containing the antennas that is meant to be ingested by a cow or other ruminant animal. The bolus is configured to transmit radio waves in essentially an omnidirectional pattern more efficiently when the boluses inside of a cow stomach than when the boluses outside of the cow.