Antenna module including plurality of radiators, and base station including the antenna module
A technique for converging Internet of things (IoT) technology with a fifth generation (5G) communication system for supporting data rates beyond a fourth generation (4G) system can be applied to intelligent services. An antenna module includes a first radiator radiating a radio wave through an upper surface, a second radiator formed surrounding an outer periphery of the first radiator, a dielectric having an upper surface disposed under a lower surface of the first radiator, the dielectric being formed to fix the first radiator and the second radiator to be separated based on a first length, a feeder having an upper surface disposed under a lower surface of the dielectric, the feeder coupling an electrical signal to at least one of the radiator or second radiators through the dielectric, and a printed circuit board electrically connected to the feeder by a conductive pattern and supplying the electrical signal to the feeder.
1. An antenna module of a wireless communication system, the antenna module comprising:
a first radiator configured to radiate a radio wave through an upper surface;
a second radiator formed so as to surround an outer periphery of the first radiator;
a dielectric having an upper surface disposed under a lower surface of the first radiator, the dielectric being formed to fix the first radiator and the second radiator to be separated from each other based on a predetermined first length;
a feeder having an upper surface disposed under a lower surface of the dielectric, the feeder coupling an electrical signal to at least one of the first radiator or the second radiator through the dielectric; and
a printed circuit board (PCB) electrically connected to the feeder by a conductive pattern and supplying the electrical signal to the feeder,
wherein a height of an upper surface of the second radiator is greater than or equal to a height of an upper surface of the first radiator,
wherein one side surface of the second radiator facing the outer periphery of the first radiator, and
wherein a part of the radio wave radiated by the first radiator is reflected by the one side surface of the second radiator and then radiated to an outside of the antenna module.
2. The antenna module of claim 1 ,
wherein the lower surface of the first radiator and the upper surface of the feeder are separated based on a predetermined second length by the dielectric, and
wherein the predetermined second length is determined based on frequency characteristics of the radio wave radiated by the first radiator.
3. The antenna module of claim 1 , wherein the second radiator is formed of a barrier having a predetermined height which surrounds laterally the first radiator.
4. The antenna module of claim 1 ,
wherein a height difference between the first radiator and the second radiator is determined based on frequency characteristics of the radio wave radiated by the first radiator.
5. The antenna module of claim 1 ,
wherein a plurality of sub-second radiators segmented from the second radiator are disposed along the outer periphery of the first radiator, and
wherein each of the sub-second radiators includes a first segment disposed in parallel with the upper surface of the first radiator, and a second segment extending from an end of the first segment toward the PCB.
6. The antenna module of claim 5 , wherein an area of an upper surface of the first segment is determined based on frequency characteristics of the radio wave radiated by the first radiator.
7. The antenna module of claim 5 , wherein a height of an upper surface of the first segment is greater than a height of the upper surface of the first radiator.
8. The antenna module of claim 1 , further comprising:
a supporter formed of a metallic material and disposed under the lower surface of the dielectric so that an upper surface of the PCB is separated from the lower surface of the dielectric based on a predetermined third length.
9. A base station comprising:
at least one antenna module,
wherein the at least one antenna module includes:
a first radiator configured to radiate a radio wave through an upper surface;
a second radiator formed so as to surround an outer periphery of the first radiator;
a dielectric having an upper surface disposed under a lower surface of the first radiator, the dielectric being formed to fix the first radiator and the second radiator to be separated from each other based on a predetermined first length;
a feeder having an upper surface disposed under a lower surface of the dielectric, the feeder coupling an electrical signal to at least one of the first radiator or the second radiator through the dielectric; and
a printed circuit board (PCB) electrically connected to the feeder by a conductive pattern and supplying the electrical signal to the feeder, and
wherein a height of an upper surface of the second radiator is greater than or equal to a height of an upper surface of the first radiator,
wherein one side surface of the second radiator facing the outer periphery of the first radiator, and
wherein a part of the radio wave radiated by the first radiator is reflected by the one side surface of the second radiator and then radiated to an outside of the antenna module.
10. The base station of claim 9 ,
wherein the lower surface of the first radiator and the upper surface of the feeder are separated based on a predetermined second length by the dielectric, and
wherein the predetermined second length is determined based on frequency characteristics of the radio wave radiated by the first radiator.
11. The base station of claim 9 , wherein the second radiator is formed of a barrier having a predetermined height which surrounds laterally the first radiator.
12. The base station of claim 9 ,
wherein a height difference between the first radiator and the second radiator is determined based on frequency characteristics of the radio wave radiated by the first radiator.
13. The base station of claim 9 , wherein a plurality of sub-second radiators segmented from the second radiator are disposed along the outer periphery of the first radiator.
14. The base station of claim 13 , wherein each of the sub-second radiators includes a first segment disposed in parallel with the upper surface of the first radiator, and a second segment extending from an end of the first segment toward the PCB.
15. The base station of claim 14 , wherein an area of an upper surface of the first segment is determined based on frequency characteristics of the radio wave radiated by the first radiator.
16. The base station of claim 14 , wherein a height of an upper surface of the first segment is greater than a height of the upper surface of the first radiator.
17. The base station of claim 9 , wherein the at least one antenna module further includes:
a supporter formed of a metallic material and disposed under the lower surface of the dielectric so that an upper surface of the PCB is separated from the lower surface of the dielectric based on a predetermined third length.
18. A base station comprising:
a plurality of antenna arrays,
wherein each of the plurality of antenna arrays includes at least one antenna module,
wherein each of the at least one antenna module includes:
a first radiator configured to radiate a radio wave through an upper surface;
a second radiator formed so as to surround an outer periphery of the first radiator;
a dielectric having an upper surface disposed under a lower surface of the first radiator, the dielectric being formed to fix the first radiator and the second radiator to be separated from each other based on a predetermined first length;
a feeder having an upper surface disposed under a lower surface of the dielectric, the feeder coupling an electrical signal to at least one of the first radiator or the second radiator through the dielectric; and
a printed circuit board (PCB) electrically connected to the feeder by a conductive pattern and supplying the electrical signal to the feeder, and
wherein a height of an upper surface of the second radiator is greater than or equal to a height of an upper surface of the first radiator,
wherein one side surface of the second radiator facing the outer periphery of the first radiator, and
wherein a part of the radio wave radiated by the first radiator is reflected by the one side surface of the second radiator and then radiated to an outside of the antenna module.
19. The base station of claim 18 , wherein a part of the radio wave radiated by the first radiator is reflected by the second radiator and then radiated to an outside of the antenna module.
20. The base station of claim 18 ,
wherein the antenna array includes a first antenna module and a second antenna module,
wherein the first antenna module includes:
a third radiator radiating a radio wave through an upper surface; and
a fourth radiator formed to surround laterally the upper surface of the third radiator, and
wherein a part of the radio wave radiated from the upper surface of the third radiator to the second antenna module is blocked by the fourth radiator.