Antenna including conductive pattern and electronic device including the same

An electronic device comprising:

• a housing including a first plate, a second plate facing away from the first plate, and a side member surrounding a space between the first plate and the second plate;
• a first printed circuit board (PCB) disposed in parallel with the first plate in the space between the first plate and the second plate, and including a first face facing the first plate and a second face facing the second plate;
• at least one conductive plate formed on the second face;
• a first conductive pattern embedded in the first PCB and disposed to be closer to a portion of the side member than the conductive plate when viewed from above the first plate;
• a first wireless communication circuit mounted on a first face of the first PCB, electrically coupled to the conductive plate and the first conductive pattern, and configured to perform at least one of transmission and reception of a signal having a frequency in the range of about 6 GHz to 100 GHz;
• a dielectric structure disposed on the first face between the conductive plate and the side member when viewed from above the first plate;
• a second conductive pattern constructed on one face of the dielectric structure or embedded at least partially inside thereof;
• and
• a second wireless communication circuit electrically coupled to the second conductive pattern and configured to perform at least one of transmission and reception of a signal having a frequency in the range of about 0.5 GHz to 6 GHz.