Dr Han of the Korean Astronomical Observatory has reported good
progress with the Joint QMCI/TK Multiplexers which separates 22, 43, 89
and 123 GHz Bands. The first telescope of a set of inteferometric
linked instruments on the Korean Peninsular is now operating on the lower
two bands with very low loss and excellent channel co-alignment. 

QMCI and TK designed Optical Components on
their QO bench

 
The figures show a simultaneous measurements of Maser and H2O Maser
lines along with a beam patterns of Jupiter, giving the beam alignment.

Image of Jupiter at 43 GHz taken by KVN
telescope at Yonsei University in Seoul

Simultaneous measurements on Orion-KL of Water and SiO
Maser lines