Systems and methods for underwater coaching systems
Systems and methods for underwater coaching systems in accordance with embodiments of the invention are disclosed. In one embodiment, a wireless communication system includes a receiver system including a receive antenna configured to receive a radio frequency signal, at least two impedance matching networks, a first water-adapted impedance matching network adapted for reception in a water environment and a second air-adapted impedance matching network adapted for reception in an air environment, a switch configured to select between the at least two impedance matching networks, a signal decoding circuit configured to decode a received radio frequency signal, an amplifier configured to amplify a decoded signal, and a user output.
1. A wireless communication system comprising:
a receiver system comprising:
a receive antenna configured to receive a radio frequency signal;
at least two impedance matching networks, a first water-adapted impedance matching network adapted for reception in a water environment and a second air-adapted impedance matching network adapted for reception in an air environment;
a switch configured to select between the at least two impedance matching networks;
a signal decoding circuit configured to decode a received radio frequency signal received by the receive antenna;
an amplifier configured to amplify a decoded signal decoded by the signal decoding circuit; and
a user output.
2. The wireless communication system of claim 1 , wherein the receive antenna is a folded dipole with equivalent length in free space of 75 cm.
3. The wireless communication system of claim 1 , wherein the receive antenna is printed on a receiver enclosure using laser direct structuring.
4. The wireless communication system of claim 1 , wherein at least one impedance matching network comprises two capacitors in parallel connected to an inductor in series to ground.
5. The wireless communication system of claim 1 , wherein the switch is controlled by the output of a water sensor to select the water-adapted impedance matching network when the output indicates a water environment and to select the air-adapted impedance matching network when the output indicates an air environment.
6. The wireless communication system of claim 1 , wherein the user output comprises one or more bone conduction elements.
7. The wireless communication system of claim 1 , further comprising:
a transmitter system comprising:
one or more audio inputs;
an audio encoder;
an amplifier; and
a transmit antenna.
8. The wireless communication system of claim 7 :
wherein the one or more audio inputs of the transmitter system comprises at least two audio inputs, one of which is a microphone; and
the transmitter system further comprises a mixer.
9. The wireless communication system of claim 7 , wherein the audio encoder is configured to generate a radio frequency signal in a band between 174-216 MHz.