Extended EVLA band coverage - K-band

Most EVLA antennas currently in the array (see the table in the relevant section for the current status) have the new wide-band K-band receivers installed, which can be tuned outside the traditional VLA K-band range (21.2 - 25.2 GHz). Recent tests show that meaningful results can be obtained from 18.1 - 26.5 GHz, with a small penalty in performance at the extreme ends, as shown in this figure, which plots the rms (in arbitrary units) averaged over the four IFs as a function of frequency at the band edges. Note that at 18.1 and 18.3 GHz not all IFs led to a solution. Between these edges, the rms rises linearly with frequency, with a slope largely determined by the frequency dependent antenna efficiency.

Modified on Tuesday, 29-Jan-2013 13:57:47 MST by Gustaaf van Moorsel