Electronic device including antenna

1 . An electronic device comprising:

a housing; and

a sliding plate configured to slide in and slide out relative to the housing,

wherein the housing comprises:

an antenna circuit disposed on a side surface of the housing corresponding to a sliding-side area of the sliding plate, and

a contact electrically interconnecting the housing and the sliding plate,

wherein the antenna circuit further comprises at least one frame disposed on the side surface as a radiator,

wherein the side surface comprises a first slit structure,

wherein the housing and the sliding plate define a first space when the sliding plate is in a slide-out state, and

wherein the first space, the contact, the first slit structure, and the antenna circuit configure a cavity antenna.

2 . The electronic device of claim 1 ,

wherein the housing comprises:

a non-stepped first surface; and

a stepped second surface, and

wherein the side surface surrounds a second space between the non-stepped first surface and the stepped second surface.

3 . The electronic device of claim 2 , wherein the side surface comprises a first side surface, a second side surface, a third side surface, and a fourth side surface surrounding the first space in a substantially rectangular shape.

4 . The electronic device of claim 3 , wherein the first side surface is disposed on the side surface corresponding to the sliding-side area of the sliding plate of the sliding plate.

5 . The electronic device of claim 4 ,

wherein the first side surface comprises:

at least two frames,

wherein the first slit structure is formed between the at least two frames, and

wherein the at least two frames are made of a conductive material.

6 . The electronic device of claim 5 , wherein the sliding plate comprises a second slit structure corresponding to the first slit structure when the sliding plate is in a slide-in state.

7 . The electronic device of claim 4 ,

wherein the second side surface is parallel to the first side surface, and

wherein the second side surface, which surrounds the non-stepped first surface and the stepped second surface, has a height greater than a height of the first side surface, which surrounds the non-stepped first surface and the stepped second surface.

8 . The electronic device of claim 7 , further comprising:

a fifth side surface, which surrounds the non-stepped first surface and the stepped second surface,

wherein the fifth side surface is parallel to the second side surface and has a length obtained by subtracting the height of the first side surface from the height of the second side surface.

9 . The electronic device of claim 8 , wherein the first space comprises:

a surface on which the sliding plate faces the housing in a state in which the sliding plate is slid out;

at least a portion of the stepped second surface; and

an opening surrounded by the fifth side surface.

10 . The electronic device of claim 5 , wherein the antenna circuit is electrically connected to a main printed circuit board.

11 . The electronic device of claim 10 , wherein the at least two frames comprise an antenna pattern.

12 . The electronic device of claim 11 , further comprising:

a cable electrically interconnecting the at least two frames and the main printed circuit board; and

a sub-printed circuit board electrically connected to the cable and electrically connected to the at least two frames.

13 . The electronic device of claim 12 , wherein the sub-printed circuit board is included in the at least two frames and/or the first slit structure.

14 . The electronic device of claim 1 ,

wherein the contact is disposed in the first space and comprised in the housing or the sliding plate, the contact being configured to adjust a resonance frequency band of the cavity antenna and to perform an impedance matching operation of the housing or the sliding plate.

15 . The electronic device of claim 1 , wherein the sliding plate comprises:

a non-stepped third surface;

a stepped fourth surface; and

a side surface surrounding a third space between the non-stepped third surface and the stepped fourth surface.

16 . The electronic device of claim 1 , wherein the cavity antenna forms a resonance corresponding to an operating frequency based on a length of a major axis of the first space, a length of a minor axis of the first space and a dielectric included in the first space.