Terminal antenna system and electronic device
Embodiments of this application relate to the field of antenna technologies, and disclose a terminal antenna system and an electronic device, to effectively reduce mutual impact between adjacent antennas. A specific solution is as follows: The terminal antenna system includes: a first radiator and a second radiator, where a first end of the first radiator is coupled to a first end of the second radiator through a gap. A first feed point is provided at a second end, away from the second radiator, of the first radiator, and a first ground point is further provided on the first radiator. A second feed point is provided at a second end of the second radiator, and the second end of the second radiator is an end away from the first radiator.
1 . A terminal antenna system, wherein the terminal antenna system is coupled to a housing or a cover of an electronic device, the terminal antenna system comprising:
a first radiator and a second radiator, wherein a first end of the first radiator is coupled to a first end of the second radiator through a gap, the first radiator comprises a first portion and a second portion, the first portion and the second portion are connected in an L shape, and the gap is located between the second portion and the second radiator;
a first feed point, located at a second end of the first radiator, away from the second radiator, wherein a first ground point is located on the first portion of the first radiator, and the first ground point is electrically coupled to a reference ground;
a second feed point, located at a second end of the second radiator, and the second end of the second radiator is located away from the first radiator;
a first antenna comprising the first radiator;
a second antenna comprising: the second radiator, the second portion of the first radiator, and a portion of the first radiator between the second portion and the first ground point on the first radiator; and
a capacitor, disposed between the first feed point and the first radiator, the capacitor being coupled to the first radiator to configure the first antenna to operate in a left-handed mode, wherein the left-handed mode is a resonance mode in which a unidirectional current is formed on the first radiator from the first feed point toward the first ground point, wherein
when the terminal antenna system operates, the first antenna covers a first frequency band, the second antenna covers a second frequency band and a third frequency band, and a resonance position of the second frequency band is higher than that of the first frequency band,
the first antenna operates in the left-handed mode and an equilibrium mode to cover the first frequency band, the equilibrium mode being a resonance mode that expands a usable bandwidth of the first antenna in combination with the left-handed mode, and
a distance between the first portion of the first radiator and the reference ground determines a resonance position of the equilibrium mode.
2 . The terminal antenna system according to claim 1 , wherein the housing is a metal housing.
3 . The terminal antenna system according to claim 2 , wherein
the distance between the first portion of the first radiator and the reference ground is within a range of 2 mm to 4 mm;
a length of the second portion of the first radiator is within a range of 5 mm to 15 mm; and
a width of the gap is within a range of 0.2 mm to 1.2 mm.
4 . The terminal antenna system according to claim 2 , wherein the first radiator and the second radiator are formed on a flexible printed circuit.
5 . The terminal antenna system according to claim 4 , wherein
the first end of the second radiator is suspended and the second end of the second radiator is grounded.
6 . The terminal antenna system according to claim 1 , wherein the cover is a rear cover or the electronic device.
7 . The terminal antenna system according to claim 3 , wherein
the width of the gap determines resonance positions of the second frequency band and the third frequency band; and
the length of the second portion of the first radiator determines the resonance position of the second frequency band.
8 . The terminal antenna system according to claim 6 , wherein
the terminal antenna system is disposed at a corner of the electronic device, and
the first portion of the first radiator is disposed on a side of the electronic device, and the second portion of the first radiator and the second radiator are disposed at a top or a bottom of the electronic device.
9 . The terminal antenna system according to claim 6 , wherein the first frequency band comprises a GPS frequency band, the second frequency band comprises 2.5 GHz to 2.7 GHZ, and the third frequency band comprises 3.3 GHz to 3.8 GHz.
10 . The terminal antenna system according to claim 1 , wherein the terminal antenna system is disposed at a corner of the electronic device, and
the first portion of the first radiator is disposed at a top or a bottom of the electronic device, and a second portion of the first radiator and the second radiator are disposed on a side of the electronic device.
11 . A terminal antenna system, wherein the terminal antenna system is disposed in an electronic device, and the terminal antenna system comprises:
a first radiator and a second radiator, wherein a first end of the first radiator is coupled to a first end of the second radiator through a gap, the first radiator comprises a first portion and a second portion, the first portion and the second portion are connected in an L shape, and the gap is located between the second portion and the second radiator;
a first feed point, located at a second end of the first radiator, away from the second radiator, wherein a first ground point is located on the first portion of the first radiator, and the first ground point is electrically coupled to a reference ground;
a second feed point, located at a second end of the second radiator, and the second end of the second radiator is located away from the first radiator;
a first antenna comprising the first radiator;
a second antenna comprising: the second radiator, the second portion of the first radiator, and a portion of the first radiator between the second portion and the first ground point on the first radiator; and
a capacitor which is disposed between the first feed point and the first radiator, the capacitor being coupled to the first radiator to configure the first antenna to operate in a left-handed mode, wherein the left-handed mode is a resonance mode in which a unidirectional current is formed on the first radiator from the first feed point toward the first ground point, wherein
when the terminal antenna system operates, the first antenna covers a first frequency band, the second antenna covers a second frequency band and a third frequency band, and a resonance position of the second frequency band is higher than that of the first frequency band,
the first antenna operates in the left-handed mode and an equilibrium mode to cover the first frequency band, the equilibrium mode being a resonance mode that expands a usable bandwidth of the first antenna in combination with the left-handed mode, and
a distance between the first portion of the first radiator and the reference ground determines a resonance position of the equilibrium mode.
12 . The terminal antenna system according to claim 11 , wherein the first radiator and the second radiator are formed on a flexible printed circuit.
13 . The terminal antenna system according to claim 11 , wherein
the distance between the first portion of the first radiator and the reference ground is within a range of 2 mm to 4 mm;
a length of the second portion of the first radiator is within a range of 5 mm to 15 mm; and
a width of the gap is within a range of 0.2 mm to 1.2 mm.
14 . The terminal antenna system according to claim 11 , wherein
the first end of the second radiator is suspended and the second end of the second radiator is grounded.
15 . The terminal antenna system according to claim 13 , wherein
the width of the gap determines resonance positions of the second frequency band and the third frequency band;
the length of the second portion of the first radiator determines the resonance position of the second frequency band.
16 . The terminal antenna system according to claim 11 , wherein the terminal antenna system is disposed at a corner of the electronic device, wherein the first portion of the first radiator is disposed on a side of the electronic device, and the second portion of the first radiator and the second radiator are disposed at a top or a bottom of the electronic device.
17 . The terminal antenna system according to claim 11 , wherein the first frequency band comprises a GPS frequency band, the second frequency band comprises 2.5 GHz to 2.7 GHZ, and the third frequency band comprises 3.3 GHz to 3.8 GHz.
18 . The terminal antenna system according to claim 11 , wherein the terminal antenna system is disposed at a corner of the electronic device, wherein
the first portion of the first radiator is disposed at a top or a bottom of the electronic device, and the second portion of the first radiator and the second radiator are disposed on a side of the electronic device.
19 . An electronic device, comprising a terminal antenna system and when the electronic device transmits or receives a signal, the signal is transmitted or received through the terminal antenna system, the terminal antenna system comprising:
a first radiator and a second radiator, wherein a first end of the first radiator is coupled to a first end of the second radiator through a gap, the first radiator comprises a first portion and a second portion, the first portion and the second portion are connected in an L shape, and the gap is located between the second portion and the second radiator;
a first feed point, located at a second end of the first radiator, away from the second radiator, wherein a first ground point is located on the first portion of the first radiator, and the first ground point is electrically coupled to a reference ground;
a second feed point, located at a second end of the second radiator, and the second end of the second radiator is located away from the first radiator;
a first antenna comprising the first radiator;
a second antenna comprising: the second radiator, the second portion of the first radiator, and a portion of the first radiator between the second portion and the first ground point on the first radiator; and
a capacitor, disposed between the first feed point and the first radiator, the capacitor being coupled to the first radiator to configure the first antenna to operate in a left-handed mode, wherein the left-handed mode is a resonance mode in which a unidirectional current is formed on the first radiator from the first feed point toward the first ground point, wherein
when the terminal antenna system operates, the first antenna covers a first frequency band, the second antenna covers a second frequency band and a third frequency band, and a resonance position of the second frequency band is higher than that of the first frequency band,
the first antenna operates in the left-handed mode and an equilibrium mode to cover the first frequency band, the equilibrium mode being a resonance mode that expands a usable bandwidth of the first antenna in combination with the left-handed mode, and
a distance between the first portion of the first radiator and the reference ground determines a resonance position of the equilibrium mode.