A portable communication device comprising: a display disposed in a housing; the housing comprising: a front glass plate forming at least a portion of a front surface of the portable communication device, a rear glass plate forming at least a portion of a rear surface of the portable communication device and a side member including a conductive part and a dielectric material, wherein the dielectric material is arranged between and coupled to the conductive part and wherein the conductive part and the dielectric material form at least a part of a side surface of the housing; the display includes a conductive material or a conductive support member as a component therein disposed in the housing and along the front glass plate; an antenna module positioned in the housing; and a conductive coating layer on an inside surface of the rear glass plate, the conductive coating layer is positioned on an inside surface of the rear glass plate, the antenna module is located between the conductive coating layer and the conductive material or the conductive support member, the antenna module comprises: a printed circuit board, PCB, facing toward the side surface of the housing and at least partially overlapped with the dielectric material when viewed in a direction substantially perpendicular to the side surface; and an antenna array located on or in the PCB and configured to support a millimeter wave frequency band; wherein the portable communication device further comprises a reflection plate located between the front glass plate and the rear glass plate, the reflection plate being substantially parallel with the PCB such that the PCB is located between the reflection plate and the dielectric material. a display disposed in a housing; the housing comprising: a front glass plate forming at least a portion of a front surface of the portable communication device, a rear glass plate forming at least a portion of a rear surface of the portable communication device and a side member including a conductive part and a dielectric material, wherein the dielectric material is arranged between and coupled to the conductive part and wherein the conductive part and the dielectric material form at least a part of a side surface of the housing; a front glass plate forming at least a portion of a front surface of the portable communication device, a rear glass plate forming at least a portion of a rear surface of the portable communication device and a side member including a conductive part and a dielectric material, wherein the dielectric material is arranged between and coupled to the conductive part and wherein the conductive part and the dielectric material form at least a part of a side surface of the housing; the display includes a conductive material or a conductive support member as a component therein disposed in the housing and along the front glass plate; an antenna module positioned in the housing; and a conductive coating layer on an inside surface of the rear glass plate, the conductive coating layer is positioned on an inside surface of the rear glass plate, the antenna module is located between the conductive coating layer and the conductive material or the conductive support member, the antenna module comprises: a printed circuit board, PCB, facing toward the side surface of the housing and at least partially overlapped with the dielectric material when viewed in a direction substantially perpendicular to the side surface; and an antenna array located on or in the PCB and configured to support a millimeter wave frequency band; wherein the portable communication device further comprises a reflection plate located between the front glass plate and the rear glass plate, the reflection plate being substantially parallel with the PCB such that the PCB is located between the reflection plate and the dielectric material. an antenna module positioned in the housing; and a conductive coating layer on an inside surface of the rear glass plate, the conductive coating layer is positioned on an inside surface of the rear glass plate, the antenna module is located between the conductive coating layer and the conductive material or the conductive support member, the antenna module comprises: a printed circuit board, PCB, facing toward the side surface of the housing and at least partially overlapped with the dielectric material when viewed in a direction substantially perpendicular to the side surface; and an antenna array located on or in the PCB and configured to support a millimeter wave frequency band; wherein the portable communication device further comprises a reflection plate located between the front glass plate and the rear glass plate, the reflection plate being substantially parallel with the PCB such that the PCB is located between the reflection plate and the dielectric material. a printed circuit board, PCB, facing toward the side surface of the housing and at least partially overlapped with the dielectric material when viewed in a direction substantially perpendicular to the side surface; and an antenna array located on or in the PCB and configured to support a millimeter wave frequency band; wherein the portable communication device further comprises a reflection plate located between the front glass plate and the rear glass plate, the reflection plate being substantially parallel with the PCB such that the PCB is located between the reflection plate and the dielectric material.