Mobile terminal having an antenna including dielectrics on a circuit board

1. A mobile terminal comprising:

a terminal body;

an antenna device configured to generate a resonant frequency of a frequency band for 5G communication system,

wherein the antenna device is an antenna array including a plurality of dielectrics operating as a resonator; and

a circuit board including a feeding unit and a ground plane and configured to be inserted into each of the dielectrics such that a portion of the circuit board protrudes outward.

2. The mobile terminal of claim 1 , further comprising a first antenna device provided inside the terminal body and configured to generate a resonant frequency of a first frequency band for the 5G communication system, and

wherein the antenna device is a second antenna device configured to generate resonant frequency of a second frequency band for the 5G communication system.

3. The mobile terminal of claim 2 , wherein intervals between the plurality of dielectrics are 0.45 to 0.7 times a wavelength λ, corresponding to a center frequency of the second frequency band.

4. The mobile terminal of claim 1 , wherein the circuit board is partially cut out to form a concave portion and a convex portion, and

wherein each of the dielectrics is inserted into the concave portion.

5. The mobile terminal of claim 1 , wherein, the terminal body includes a metal cover,

a non-metal member is placed on the metal cover, and

the antenna device is placed at a position overlapping the non-metal member.

6. The mobile terminal of claim 5 , wherein, the non-metal member covers an upper surface of the terminal body, and

the plurality of dielectrics are formed to overlap the non-metal member.

7. The mobile terminal of claim 6 , wherein the plurality of dielectrics have a V-shaped cross section.

8. The mobile terminal of claim 6 , wherein a plurality of holes are formed in the non-metal member, and the plurality of dielectrics are exposed outward through the plurality of holes.

9. The mobile terminal of claim 1 , wherein a radiation pattern is formed to be omni-directional by beamforming of the plurality of dielectrics.

10. The mobile terminal of claim 1 , wherein, each of the dielectrics is placed on the ground plane, and

the ground plane is formed by a plurality of via holes passing through the main circuit board, or

the ground plane is implemented on a surface of an antenna chip corresponding to an internal circuit.

11. The mobile terminal of claim 1 , wherein, the dielectrics are inserted up to a position separated from one end of the ground plane.

12. The mobile terminal of claim 1 , wherein, the dielectrics have a shape in which first and second slots are removed from an internal region with a large higher-order mode component, and the first and second slots have lengths of W L1 and W L2 and a width of W W .

13. The mobile terminal of claim 12 , wherein the protruding portion is engaged through an insertion part of a main circuit board.