System and method for elecromagnetic interference mitigation for an antenna element and speaker co-located within a cavity formed behind a speaker grill

A C-cover and D-cover assembly for an information handling system comprising:

• a metal C-cover to house a speaker grill, the speaker grill covering a speaker to emit audio waves, where the speaker grill formed within the C-cover including a slot formed around a portion of the speaker grill forming a peninsula on the speaker grill that is physically separated from the C-cover to operate as an antenna;
• an antenna element placed behind the speaker grill;
• an electromagnetic interference (EMI) shield forming a cavity to house the antenna element and speaker, comprising:
• a plurality of metallic shielding walls extending from the C-cover to the D-cover, wherein a first metallic wall of the plurality of metallic shielding walls comprise a metallic overlay placed over a plastic audio insert placed within the cavity of the C-cover.

An information handling system to transmit a communication signal comprising:

• a metal C-cover and a metal D-cover assembly including a processor, a memory, and a wireless adapter, the metal C-cover to house a speaker grill, the speaker grill covering a speaker to emit audio waves;
• the speaker grill formed within the C-cover to cover a speaker and antenna element, the speaker grill comprising:
• a slot formed around a portion of the speaker grill forming a peninsula on the speaker grill that is physically separated from the C-cover;
• a plurality of electromagnetic isolation (EMI) shielding walls placed around the perimeter of the speaker grill to form a cavity behind the speaker grill;
• wherein the EMI shielding walls extend from the C-cover to a D-cover of the information handling system;
• wherein the EMI shielding walls include a conductive rubber gasket placed between at least one of the EMI shielding walls and the D-cover to shield the cavity from EMI sources;
• and
• wherein a first EMI shielding wall of the plurality of EMI shielding walls comprises a metallic overlay placed over a non-metallic portion of the C-cover.