Efficiency variable antenna
An efficiency variable antenna is provided, the efficiency variable antenna including: a feeding portion; a first grounding portion; a second grounding portion; a first switching element configured to turn on or off the feeding portion and the first grounding portion; and a second switching element configured to turn on or off the feeding portion and the second grounding portion.
1. An efficiency variable antenna, comprising:
a feeding portion;
a matching element including at least three inductors, for impedance matching of a current applied from the feeding portion;
a first grounding portion and a second grounding portion connected to a first inductor and a second inductor included in the matching element;
a first switching element configured to allow the first inductor connected to or disconnected from a circuit;
a second switching element configured to allow the second inductor connected to or disconnected from the circuit; and
a first choke inductor and a second choke inductor configured to respectively supply electric power to the first switching element and the second switching element.
2. An efficiency variable antenna, comprising:
a feeding portion;
a first grounding portion;
a second grounding portion;
a first switching element configured to turn on or off the feeding portion and the first grounding portion;
a second switching element configured to turn on or off the feeding portion and the second grounding portion; and
a first choke inductor and a second choke inductor configured to respectively supply electric power to the first switching element and the second switching element.
3. The efficiency variable antenna of claim 2 , further comprising:
a first inductor arranged between the first grounding portion and the first switching element, and configured to perform impedance matching;
a second inductor arranged between the second grounding portion and the second switching element, and configured to perform impedance matching; and
a third inductor applied with electric power directly from the feeding portion.