| CPC H01Q 3/247 (2013.01) [H01Q 21/065 (2013.01)] | 16 Claims |
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1. An antenna array comprising:
a plurality of antenna array elements, each antenna array element of the plurality of antenna array elements including:
a main printed circuit board (PCB) over which a middle layer and an additional PCB are arranged,
wherein a first patch element is disposed at the main PCB, and a second patch element is disposed at the additional PCB,
wherein the antenna array element further includes a cavity in the middle layer to reduce coupling between the antenna array element and at least another antenna array element of the plurality of antenna array elements,
wherein the antenna array element further includes at least one of a cavity in the main PCB or a cavity in the additional PCB,
wherein the cavity in the main PCB is defined by a plurality of first plated through VIAs surrounding the first patch element, and the cavity in the additional PCB is defined by a plurality of second plated VIAs surrounding the second patch element,
wherein the cavity in the middle layer, together with at least one of the cavity in the additional PCB or the cavity in the main PCB, form a complex cavity to reduce the coupling between the antenna array element and at least the other antenna array element of the plurality of antenna array elements, and
wherein the main PCB, the middle layer, and the additional PCB are interconnected by means of a non-galvanic connection.
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