Fig. 12
From: An All-Metal Broadband Low SLL slot array antenna for use in 5G Sub-6 GHz networks

Electric field distribution of cavity-backed slot array antenna in 3.5 GHz.
From: An All-Metal Broadband Low SLL slot array antenna for use in 5G Sub-6 GHz networks

Electric field distribution of cavity-backed slot array antenna in 3.5 GHz.