Antenna and electronic device including the same
An electronic device is provided. The device includes a housing including a first cover having a first dielectric constant, and an antenna structure disposed in an inner space of the housing. The antenna structure may include a PCB, an antenna element disposed in the PCB to form a beam pattern in a specific direction, a first dielectric structure disposed on a radiation path of the beam pattern, formed integrally with or combined with the PCB, and having a second dielectric constant equal to or different from the first dielectric constant, and a second dielectric structure disposed on the radiation path between the first dielectric structure and the first cover, and having a third dielectric constant higher than the first dielectric constant and the second dielectric constant. The electronic device may further include a wireless communication circuit configured to transmit and/or receive a radio signal through the antenna element.
1. An electronic device comprising:
a housing comprising a first cover facing a first direction, a second cover facing a second direction opposite to the first cover and lateral member surrounding an inner space between the first cover and the second cover, and the first cover having a first dielectric constant; and
an antenna structure disposed in the inner space of the housing and comprising:
a printed circuit board (PCB);
at least one antenna element disposed in the PCB to form a beam pattern in a third direction facing the lateral member and being perpendicular to the first direction;
a first dielectric structure disposed on a radiation path of the beam pattern, formed integrally with or combined with the PCB, and having a second dielectric constant, the first dielectric structure being spaced apart from the lateral member;
a second dielectric structure disposed on the radiation path between the first dielectric structure and the first cover, and having a third dielectric constant higher than the first dielectric constant and the second dielectric constant; and
a wireless communication circuit configured to at least one of transmit or receive a radio signal through the at least one antenna element,
wherein at least a part of the second dielectric structure is disposed between the PCB and the lateral member.
2. The electronic device of claim 1 , wherein the second dielectric structure comprises a high-dielectric injected portion injected into the first dielectric structure on the radiation path.
3. The electronic device of claim 2 , wherein the third dielectric constant is determined based on at least one of a width, a length, or a thickness of the high-dielectric injected portion.
4. The electronic device of claim 2 , wherein the high-dielectric injected portion is disposed to have an upper surface that coincides with an upper surface of the first dielectric structure.
5. The electronic device of claim 1 , wherein the second dielectric structure comprises a high-dielectric patch attached to an upper surface of the first dielectric structure on the radiation path.
6. The electronic device of claim 1 , wherein the PCB is supported at least in part by the first dielectric structure.
7. The electronic device of claim 1 ,
wherein the first dielectric structure comprises a low-dielectric structure disposed on both sides of the second dielectric structure, and
wherein the low-dielectric structure has a fourth dielectric constant lower than the third dielectric constant.
8. The electronic device of claim 7 , wherein the low-dielectric structure is formed as a recess in the first dielectric structure.
9. The electronic device of claim 8 , wherein the fourth dielectric constant is determined based on at least one of a width, a length, or a depth of the recess.
10. The electronic device of claim 7 , wherein the low-dielectric structure comprises periodic structures formed at a predetermined depth in the first dielectric structure.
11. The electronic device of claim 10 , wherein the periodic structures comprise air holes formed at the predetermined depth in the first dielectric structure.
12. The electronic device of claim 11 ,
wherein the periodic structures comprise a filling material filled in the air holes, and
wherein the filling material has a dielectric constant lower than the second dielectric constant.
13. The electronic device of claim 10 , wherein the fourth dielectric constant is determined based on at least one of a distance between the periodic structures, a size of each periodic structure, a number of arrangements of the periodic structures, or an arrangement density of the periodic structures.
14. The electronic device of claim 1 , further comprising:
a display disposed in the inner space to be visible at least in part from outside through the second cover.
15. An electronic device comprising:
a housing comprising a first cover facing a first direction, a second cover facing a second direction opposite to the first cover and lateral member surrounding an inner space between the first cover and the second cover, and the first cover having a first dielectric constant; and
an antenna structure disposed in the inner space of the housing and comprising:
a printed circuit board (PCB);
at least one antenna element disposed in the PCB to form a beam pattern in a third direction facing the lateral member and being perpendicular to the first direction; and
a dielectric structure disposed on a radiation path of the beam pattern, formed integrally with or combined with the PCB, the dielectric structure being spaced apart from the lateral member, the dielectric structure comprising:
a first area corresponding to the radiation path, and having the first dielectric constant, and
a second area including a low-dielectric structure disposed on both sides of the first area and having a second dielectric constant lower than the first dielectric constant; and
a wireless communication circuit configured to at least one of transmit or receive a radio signal through the at least one antenna element,
wherein at least a part of the first area is disposed between the PCB and the lateral member.
16. The electronic device of claim 15 , wherein the low-dielectric structure comprises a recess formed to be lower than an upper surface of the dielectric structure.
17. The electronic device of claim 16 , wherein the second dielectric constant is determined based on at least one of a width, a length, or a depth of the recess.
18. The electronic device of claim 15 , wherein the low-dielectric structure comprises periodic structures formed at a predetermined depth from an upper surface of the dielectric structure.
19. The electronic device of claim 18 , wherein the second dielectric constant is determined based on at least one of a distance between the periodic structures, a size of each periodic structure, a number of arrangements of the periodic structures, or an arrangement density of the periodic structures.
20. The electronic device of claim 15 ,
wherein the electronic device further comprises a high-dielectric structure disposed on the radiation path between the dielectric structure and the first cover, and
wherein the high-dielectric structure has a third dielectric constant higher than the first dielectric constant and a dielectric constant of the first cover.