  For E-band wireless communications, a high gain steerable antenna with
sub-arrays is desired to reduce the implementation complexity. This paper
presents an E-band communication link with 256-elements antennas based on
8-elements sub-arrays and four beam-forming chips in silicon germanium (SiGe)
bipolar complementary metal-oxide-semiconductor (BiCMOS), which is packaged on
a 19-layer low temperature co-fired ceramic (LTCC) substrate. After the design
and manufacture of the 256-elements antenna, a fast near-field calibration
method is proposed for calibration, where a single near-field measurement is
required. Then near-field to far-field (NFFF) transform and far-field to
near-field (FFNF) transform are used for the bore-sight calibration. The
comparison with high frequency structure simulator (HFSS) is utilized for the
non-bore-sight calibration. Verified on the 256-elements antenna, the
beam-forming performance measured in the chamber is in good agreement with the
simulations. The communication in the office environment is also realized using
a fifth generation (5G) new radio (NR) system, whose bandwidth is 400 megahertz
(MHz) and waveform format is orthogonal frequency division multiplexing (OFDM)
with 120 kilohertz (kHz) sub-carrier spacing.
