Electronic device comprising antenna

An electronic device comprising:

• a first frame forming a first side surface of the electronic device;
• a first opening formed in one area of the first frame;
• a first antenna that is disposed in the electronic device to wirelessly radiate a signal toward the first opening of the first frame, wherein the first antenna includes a first printed circuit board and first conductive patches disposed on one surface of the first printed circuit board that faces the first opening;
• a first dielectric material that is disposed in the first opening and has a first dielectric constant;
• a second dielectric material that is disposed between the first dielectric material and the first conductive patches, wherein the second dielectric material has a second dielectric constant that is lower than the first dielectric constant of the first dielectric material;
• a third dielectric material that has a third dielectric constant lower than the first dielectric constant of the first dielectric material, wherein the third dielectric material is disposed in the first opening and is positioned in a first direction from the first antenna toward the first opening with respect to the first dielectric material disposed in the first opening;
• and
• a wireless communication circuit that is electrically connected to the first antenna,
• wherein the wireless communication circuit is configured to feed power to the first conductive patches to transmit and/or receive a signal in a frequency band of 10 gigahertz (GHz) or higher.