  In this paper we discuss the design, manufacturing and characterization of
the feed horn array of the Strip instrument of the Large Scale Polarization
Explorer (LSPE) experiment. Strip is a microwave telescope, operating in the Q-
and W-band, for the observation of the polarized emissions from the sky in a
large fraction (about 37%) of the Northern hemisphere with subdegree angular
resolution. The Strip focal plane is populated by forty-nine Q-band and six
W-band corrugated horns, each feeding a cryogenically cooled polarimeter for
the detection of the Stokes $Q$ and $U$ components of the polarized signal from
the sky. The Q-band channel is designed to accurately monitor Galactic
polarized synchrotron emission, while the combination of Q- and W-band will
allow the study of atmospheric effects at the observation site, the
Observatorio del Teide, in Tenerife. In this paper we focus on the development
of the Strip corrugated feed horns, including design requirements, engineering
and manufacturing, as well as detailed characterization and performance
verification.
