Antenna apparatus for use in wireless devices
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). An antenna for decreasing a signal loss caused by a dielectric loss in an antenna by decreasing a space of the antenna in a wireless device and improving performance of the antenna is provided. The antenna includes a first radiator, and a second radiator installed on a cover of the wireless device to radiate a radio signal radiated by the first radiator, the second radiator separate from and facing the first radiator.
1. An antenna of a wireless device, the antenna comprising:
a first radiator to radiate a radio signal;
a second radiator disposed on a cover of the wireless device to radiate the radio signal based on a first beam; and
a third radiator disposed on the cover of the wireless device to radiate the radio signal based on a second beam that is different from the first beam,
wherein the second radiator is disposed on a first position spaced apart from and facing the first radiator,
wherein the third radiator is disposed on a second position spaced apart from and facing the first radiator,
wherein the second radiator comprises a curved radiator,
wherein the third radiator comprises a curved radiator,
wherein a direction of the first beam is associated with the first position of the second radiator on the cover,
wherein a direction of the second beam is associated with the second position of the third radiator on the cover,
wherein the first radiator includes a plurality of antenna patterns,
wherein the second radiator includes a plurality of first parasitic patches for a first polarization of the first beam and a plurality of second parasitic patches for a second polarization of the first beam, and
wherein the third radiator includes a plurality of third parasitic patches for a first polarization of the second beam and a plurality of fourth parasitic patches for a second polarization of the second beam.
2. The antenna of claim 1 ,
wherein the first radiator comprises:
a feeding unit,
a ground plane, and
an antenna pattern,
wherein the antenna pattern comprises an array antenna pattern, and
wherein the first radiator comprises a linear radiator.
3. The antenna of claim 1 ,
wherein the first radiator is disposed in a main body of the wireless device, or
wherein the first radiator is disposed on a printed circuit board (PCB) in the main body of the wireless device.
4. The antenna of claim 1 ,
wherein a ratio Zp/λ of a length Zp of the second radiator to a wavelength λ corresponding to a frequency of the radio signal is in a range of 0.1 to 0.3.
5. The antenna of claim 1 , wherein the cover comprises at least one material among a printed circuit board (PCB), silicon, low temperature co-fired ceramic (LTCC), or liquid crystal polymer (LCP).
6. The antenna of claim 1 ,
wherein the cover of the wireless device is a curved cover corresponding to the curved radiator, and
wherein a radius of curvature of the cover is same as a radius of curvature of the second radiator or a radius of curvature of the third radiator.
7. The antenna of claim 1 , wherein a ratio d/λ of a separation distance d between the first radiator and the second radiator to a wavelength λ corresponding to the frequency of the radio signal is in a range of 0.02 to 0.4.
8. A wireless device comprising:
a main body comprising a first radiator to radiate a radio signal; and
a cover comprising:
a second radiator disposed on a cover of the wireless device to radiate the radio signal based on a first beam, and
a third radiator disposed on the cover of the wireless device to radiate the radio signal based on a second beam that is different from the first beam,
wherein the second radiator disposed on a first position that faces and is spaced apart from the first radiator,
wherein the third radiator disposed on a second position that faces and is spaced apart from the first radiator,
wherein the second radiator comprises a curved radiator,
wherein the third radiator comprises a curved radiator,
wherein a direction of the first beam is associated with the first position of the second radiator on the cover,
wherein a direction of the second beam is associated with the second position of the third radiator on the cover,
wherein the first radiator includes a plurality of antenna patterns,
wherein the second radiator includes a plurality of first parasitic patches for a first polarization of the first beam and a plurality of second parasitic patches for a second polarization of the first beam, and
wherein the third radiator includes a plurality of third parasitic patches for a first polarization of the second beam and a plurality of fourth parasitic patches for a second polarization of the second beam.
9. The wireless device of claim 8 ,
wherein the first radiator comprises:
a feeding unit,
a ground plane, and
an antenna pattern,
wherein the antenna pattern comprises an array antenna pattern, and
wherein the first radiator comprises a linear radiator.
10. The wireless device of claim 8 ,
wherein a ratio Zp/λ of a length Zp of the second radiator to a wavelength λ corresponding to a frequency of the radio signal is in a range of 0.1 to 0.3.
11. The wireless device of claim 8 , wherein the cover comprises at least one material among a printed circuit board (PCB), silicon, low temperature co-fired ceramic (LTCC), or liquid crystal polymer (LCP).
12. The wireless device of claim 8 , further comprising:
a metal case surrounding the cover,
wherein the metal case comprises an opening, located in a position corresponding to a conductive parasitic patch, for providing a delivery path of the radio signal radiated by the second radiator.
13. The wireless device of claim 8 ,
wherein the cover of the wireless device is a curved cover corresponding to the curved radiator, and
wherein a radius of curvature of the cover is same as a radius of curvature of the second radiator or a radius of curvature of the third radiator.
14. The wireless device of claim 8 , wherein a ratio d/λ of a separation distance d between the first radiator and the second radiator to a wavelength λ corresponding to the frequency of the radio signal is in a range of 0.02 to 0.4.