An electronic device comprising a display, a back cover, a frame extending between said display and said back cover, and at least one antenna module for generation of millimeter-wave frequency radiation, said antenna module comprising, an antenna comprising, at least one first antenna element configured to excite a first electric field having a first polarization, and at least one second antenna element configured to excite a second electric field having a second polarization, said first antenna element and said second antenna element extending in an antenna plane, a first conductive structure and a second conductive structure, an anisotropic dielectric volume partially enclosed by said antenna, said first conductive structure, and said second conductive structure, a first surface of said dielectric volume being open to an exterior of said antenna module, said dielectric volume configured to allow said first electric field and said second electric field to propagate, within said dielectric volume, from said antenna at least partially towards said first conductive structure, and radiate from said first surface to said exterior; said frame comprises the first conductive structure of said antenna module, said display comprises the second conductive structure of said antenna module, wherein said dielectric volume further comprises a plurality of ground strips, said plurality of ground strips are aligned with said antenna plane and divide said dielectric volume into a first dielectric volume and a second dielectric volume, said first dielectric volume extending between said first surface of said dielectric volume and said ground strips, said second dielectric volume extending between said ground strips and said second conductive structure. said antenna module comprising, an antenna comprising, at least one first antenna element configured to excite a first electric field having a first polarization, and at least one second antenna element configured to excite a second electric field having a second polarization, said first antenna element and said second antenna element extending in an antenna plane, a first conductive structure and a second conductive structure, an anisotropic dielectric volume partially enclosed by said antenna, said first conductive structure, and said second conductive structure, a first surface of said dielectric volume being open to an exterior of said antenna module, said dielectric volume configured to allow said first electric field and said second electric field to propagate, within said dielectric volume, from said antenna at least partially towards said first conductive structure, and radiate from said first surface to said exterior; an antenna comprising, at least one first antenna element configured to excite a first electric field having a first polarization, and at least one second antenna element configured to excite a second electric field having a second polarization, said first antenna element and said second antenna element extending in an antenna plane, a first conductive structure and a second conductive structure, an anisotropic dielectric volume partially enclosed by said antenna, said first conductive structure, and said second conductive structure, a first surface of said dielectric volume being open to an exterior of said antenna module, said dielectric volume configured to allow said first electric field and said second electric field to propagate, within said dielectric volume, from said antenna at least partially towards said first conductive structure, and radiate from said first surface to said exterior; said frame comprises the first conductive structure of said antenna module, said display comprises the second conductive structure of said antenna module, wherein said dielectric volume further comprises a plurality of ground strips, said plurality of ground strips are aligned with said antenna plane and divide said dielectric volume into a first dielectric volume and a second dielectric volume, said first dielectric volume extending between said first surface of said dielectric volume and said ground strips, said second dielectric volume extending between said ground strips and said second conductive structure. wherein said dielectric volume further comprises a plurality of ground strips, said plurality of ground strips are aligned with said antenna plane and divide said dielectric volume into a first dielectric volume and a second dielectric volume, said first dielectric volume extending between said first surface of said dielectric volume and said ground strips, said second dielectric volume extending between said ground strips and said second conductive structure.