Electric composite detection antenna

An electric composite detection antenna, disposed in a preset electronic device and comprising:

• a plurality of RF antennas;
• a plurality of inductive sensing coils;
• a RF compensation system, a RF unit;
• and
• a plurality of antenna matching circuits,
• wherein the plurality of RF antennas are electrically connected to the plurality of antenna matching circuits and disposed to different sides or opposite sides of the preset electronic device, respectively, and
• wherein the plurality of inductive sensing coils are configured to detect magnitudes of the transmission signals generated by the plurality of RF antennas, and transmit the detection results to the RF compensation system, so as to drive the RF unit electrically connected the RF compensation system, to adjust an application mode of the preset electronic device,
• wherein the RF unit is electrically connected to a RF switch,
• wherein in the application mode, the RF unit controls one of a plurality of antenna matching circuits through the RF switch, to switch from one of a plurality of RF antennas to the other of the plurality of RF antennas for transmitting the RF signal,
• wherein the plurality of RF antennas are antennas of the same frequency band,
• wherein a preset electronic device is a smartphone or a tablet computer, and a RF compensation system is a central processor, a microprocessor, or a chip,
• wherein the RF compensation system and the RF unit are electrically connected to a tunable capacitor, and
• wherein the at least one inductive sensing coil detects one of the RF antennas affected by external environment or close to a metal object, the RF compensation system drives the RF unit to control one of the antenna matching circuits or one of the RF antennas for stabilizing the transmission RF signal.