Radiator sharing antenna and electronic device
A terminal device includes a radiator sharing antenna. The radiator sharing antenna includes a radiator that is divided into a first sub-radiator and a second sub-radiator through a gap, a first feeding point located on the first sub-radiator, and a second feeding point located on the second sub-radiator. The first feeding point is configured to pass a first radio frequency signal through resonance of the first sub-radiator and through parasitic resonance of the second sub-radiator, and the second feeding point is configured to pass a second radio frequency signal through resonance of the second sub-radiator and through parasitic resonance of the first sub-radiator.
1 . A terminal device comprising:
a radiator sharing antenna, comprising:
a radiator comprising:
a first end; and
a second end;
a first ground point located at the first end;
a second ground point located at the second end;
a gap located between the first ground point and the second ground point, wherein the gap divides the radiator into a first sub-radiator and a second sub-radiator, and wherein the gap provides a capacitive coupling between the first sub-radiator and the second sub-radiator;
a first feeding point located on the first sub-radiator, wherein the first feeding point is configured to pass a first radio frequency signal through a first resonance of the first sub-radiator and through a first parasitic resonance of the second sub-radiator;
a second feeding point located on the second sub-radiator, wherein the second feeding point is configured to pass a second radio frequency signal through a second resonance of the second sub-radiator and through a second parasitic resonance of the first sub-radiator;
a middle frame;
a mainboard disposed on the middle frame, wherein the mainboard is separated from the first sub-radiator and the second sub-radiator; and
a radio frequency front end disposed on the mainboard and coupled with the first feeding point and the second feeding point.
2 . The terminal device of claim 1 , wherein a first distance from the first feeding point to the gap is one-sixteenth of a wavelength of an operating frequency in an antenna mode between the first feeding point and the gap, wherein a second distance from the second feeding point to the gap is one-eighth of a wavelength of an operating frequency in an antenna mode between the second feeding point and the gap, wherein a third distance from the first ground point to the gap is a quarter of a wavelength of an operating frequency in an antenna mode between the first ground point and the gap, and wherein a fourth distance from the second ground point to the gap is a quarter of a wavelength of an operating frequency in an antenna mode between the second ground point and the gap.
3 . The terminal device of claim 1 , wherein the radiator is detached from ground between the first ground point and the second ground point.
4 . The terminal device of claim 1 , further comprising:
a first filter circuit comprising a first end coupled with the first feeding point and comprising a second end that is grounded; and
a second filter circuit comprising a first end coupled with the second feeding point and comprising a second end that is grounded.
5 . The terminal device of claim 4 , wherein the first filter circuit is a high-impedance low-pass filter circuit, and wherein the second filter circuit is a high-pass low-impedance filter circuit.
6 . The terminal device of claim 4 , wherein the first filter circuit and the second filter circuit each comprise a first capacitor and a first inductor disposed in parallel.
7 . The terminal device of claim 6 , wherein the first filter circuit or the second filter circuit further comprises a second inductor coupled in series with the first capacitor, and wherein the first filter circuit or the second filter circuit further comprises a second capacitor coupled in series to the first capacitor and the first inductor.
8 . The terminal device of claim 1 , further comprising a first capacitor element disposed between the second feeding point and the radio frequency front end.
9 . The terminal device of claim 1 , wherein the middle frame comprises a middle plate and a frame disposed around the middle plate, and wherein the frame is a non-metal frame and the first sub-radiator and the second sub-radiator are disposed between the middle plate and the frame.
10 . The terminal device of claim 1 , wherein the middle frame comprises a middle plate and a metal frame disposed around the middle plate, wherein a portion of the frame defines the first sub-radiator and the second sub-radiator, and wherein the middle plate is separated from the first sub-radiator and the second sub-radiator.
11 . The terminal device of claim 1 , wherein the middle frame is grounded, and wherein the first ground point and the second ground point of the radiator sharing antenna are grounded via the middle frame.
12 . The terminal device of claim 1 , wherein the first feeding point and the second feeding point are configured to simultaneously perform signal transmission in two operating bands that are simultaneously generated on the radiator.
13 . The terminal device of claim 1 , wherein a frequency of the first resonance and a frequency of the first parasitic resonance, are each higher than a frequency of the second resonance and a frequency of the second parasitic resonance.
14 . The terminal device of claim 8 , the first capacitor element is configured to cause the second sub-radiator to generate a composite right/left-handed antenna mode.
15 . The terminal device of claim 1 , further comprising a second capacitor element disposed between the first feeding point and the radio frequency front end.
16 . The terminal device of claim 15 , the second capacitor element is configured to cause the first sub-radiator to generate a composite right/left-handed antenna mode.
17 . A radio frequency transmission method comprising:
providing a gap located between a first ground point and a second ground point of a radiator of a radio sharing antenna, wherein the gap divides the radiator into a first sub-radiator and a second sub-radiator, and wherein the gap provides a capacitive coupling between the first sub-radiator and the second sub-radiator;
providing a middle frame and a mainboard, wherein the mainboard is disposed on the middle frame, and separated from the first sub-radiator and the second sub-radiator;
providing a radio frequency front end on the mainboard, the radio frequency front end is coupled with a first feeding point located on the first sub-radiator and a second feeding point located on the second sub-radiator;
feeding a first radio frequency signal through the first feeding point to the first sub-radiator to generate a first resonance of the first sub-radiator and a first parasitic resonance of the second sub-radiator; and
feeding a second radio frequency signal through the second feeding point to the second sub-radiator to generate a second resonance of the second sub-radiator and a second parasitic resonance of the first sub-radiator.
18 . The radio frequency transmission method of claim 17 , wherein a first distance from the first feeding point to the gap is one-sixteenth of a wavelength of an operating frequency in an antenna mode generated between the first feeding point and the gap, wherein a second distance from the second feeding point to the gap is one-eighth of a wavelength of an operating frequency in an antenna mode generated between the second feeding point and the gap, wherein a third distance from the first ground point to the gap is a quarter of a wavelength of an operating frequency in an antenna mode generated between the first ground point and the gap, and wherein a fourth distance from the second ground point to the gap is a quarter of a wavelength of an operating frequency in an antenna mode generated between the second ground point and the gap.
19 . The radio frequency transmission method of claim 17 , wherein the radiator is detached from ground between the first ground point and the second ground point.
20 . The radio frequency transmission method of claim 17 , further comprising:
coupling a first end of a first filter circuit to the first feeding point, wherein a second end of the first filter circuit is grounded; and
coupling a first end of a second filter circuit to the second feeding point, wherein a second end of the second filter circuit is grounded.
21 . The radio frequency transmission method of claim 17 , comprising filtering an output of the first feeding point with a high-impedance low-pass filter circuit, and filtering an output of the second feeding point with a high-pass low-impedance filter circuit.
22 . The radio frequency transmission method of claim 17 , comprising transmitting two signals simultaneously generated on the radiator in two operating bands.
23 . The radio frequency transmission method of claim 17 , further comprising:
the first radio frequency signal through the first resonance comprises a first antenna operating band;
the first radio frequency signal through the first parasitic resonance comprises a first parasitic operating band;
the second radio frequency signal through the second resonance comprises a second antenna operating band;
the second radio frequency signal through the second parasitic resonance comprises a second parasitic operating band.
24 . The radio frequency transmission method of claim 17 , wherein a frequency of the first resonance and a frequency of the first parasitic resonance, are each higher than a frequency of the second resonance and a frequency of the second parasitic resonance.