  The paper introduces a high gain end-fire printed antenna operating at 14 GHz
with a bandwidth of 2 GHz. The 3x3 antenna sub-array formed of this element is
used to present its beam steering and multi-beam-switching capabilities for
millimeter wave Massive MIMO antenna arrays of 5G networks. The co-existence of
these two techniques in a Massive MIMO sub-array, aided by the use of a simple
two vector excitation matrix technique, is shown in this paper. The high gain
and small form factor of the antenna is useful in applications, like 5G arrays,
where space is premium and the inherent layered structure also aids to the
better cooling of the antenna front end.
