| CPC H01Q 1/521 (2013.01) [H01Q 5/28 (2015.01); H01Q 5/328 (2015.01); H01Q 5/335 (2015.01); H01Q 5/378 (2015.01); H01Q 5/50 (2015.01); H01Q 9/42 (2013.01)] | 20 Claims |
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1. An antenna apparatus, comprising:
a circuit board comprising a first surface, a first side edge, and a reference ground;
an antenna body comprising:
a first radiator comprising:
a first stub located on the first side edge and having a first end and a second end, wherein the second end is electrically connected to the reference ground; and
a second stub located on the first side edge and having a third end and a fourth end, wherein the fourth end is electrically connected to the reference ground, wherein the first end of the first stub and the third end of the second stub do not touch and are opposite to each other, wherein a first gap formed between the first end of the first stub and the third end of the second stub, and wherein the first stub, the second stub, and the first side edge form a second gap; and
a second radiator located on the circuit board and indirectly coupled to the first radiator,
wherein the second radiator and the first surface of the circuit board form a third gap, and wherein a vertical projection of the second radiator is located on the first surface;
a first feed circuit electrically connected to the first stub and the second stub and configured to:
transmit equal-amplitude out-of-phase excitation signals to the first stub and the second stub; and
excite the antenna body to generate a first radiation mode and a second radiation mode, wherein the first radiator is a main radiator in the first radiation mode, and wherein the second radiator is a main radiator in the second radiation mode; and
a second feed circuit electrically connected to the first stub and the second stub and configured to:
transmit a same excitation signal to the first stub and the second stub; and
excite the antenna body to generate a third radiation mode, wherein the first radiator is a main radiator in the third radiation mode.
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