FDTD is useful for evaluating antennas for medical implants. The wire antenna is a very simple antenna with good properties, but with some practical drawbacks in the case of human implants. The circumference antenna has lower impedance, but is more c...
Not legal. FRS radios by regulation are not permitted to have external antennas. GMRS Radios (commercial grade, not FRS/GMRS combo units) CAN have external antennas. Remember, GMRS requires an FCC license though.
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