Multi-band antenna apparatus

A multi-band antenna apparatus, comprising:

• an antenna housing, within which antenna modules with two or more frequency bands are mounted;
• fastening brackets provided at an upper and a lower sides of the antenna housing for fastening the antenna housing to an outer wall;
• guiding brackets provided on a rear surface of the antenna housing, wherein the guiding brackets include guiding members;
• a plurality of radio remote heads (RRHs) configured to be slidably coupled to the guiding brackets of the antenna housing along the guiding members;
• and
• connector portions that protrude from the rear surface of the antenna housing and are movable in a direction perpendicular to the rear surface of the antenna housing for connecting the plurality of RRHs,
• wherein the guiding members are configured to slidably guide the RRHs along a lateral direction parallel to the rear surface of the antenna housing into spaces between the rear surface of the antenna housing and the fastening brackets,
• wherein the guiding members include a first guiding member provided between a first bracket of the guiding brackets and a third bracket of the guiding brackets for slidably guiding a first RRH of the RRHs and a second guiding member provided between a second bracket of the guiding brackets and a third bracket of the guiding brackets for slidably guiding a second RRH of the RRHs,
• wherein the first guiding member includes a U-shaped first lower guiding rail provided on an upper surface of a first supporting plate of the first bracket and a reversed U-shaped first upper guiding rail provided on a lower surface of a body of the third bracket and facing the first lower guiding rail, and wherein a first mount space of the guiding bracket is defined between the first lower guiding rail and the first upper guiding rail, and
• wherein the second guiding member includes a reversed U-shaped second upper guiding rail provided on a lower surface of a second supporting plate of the second bracket and a U-shaped second lower guiding rail provided on an upper surface of the body of the third bracket and facing the second upper guiding rail, and wherein a second mount space of the guiding bracket is defined between the second upper guiding rail and the second lower guiding rail.