  Solar radio type II bursts serve as early indicators of incoming
geo-effective space weather events such as coronal mass ejections (CMEs). In
order to investigate the origin of high-frequency type II bursts (HF type II
bursts), we have identified 51 of them (among 180 type II bursts from SWPC
reports) that are observed by ground-based Compound Astronomical Low-cost
Low-frequency Instrument for Spectroscopy and Transportable Observatory
(CALLISTO) spectrometers and whose upper-frequency cutoff (of either
fundamental or harmonic emission) lies in between 150 MHz-450 MHz during
2010-2019. We found that 60% of HF type II bursts, whose upper-frequency cutoff
$\geq$ 300 MHz originate from the western longitudes. Further, our study finds
a good correlation $\sim $ 0.73 between the average shock speed derived from
the radio dynamic spectra and the corresponding speed from CME data. Also, we
found that analyzed HF type II bursts are associated with wide and fast CMEs
located near the solar disk. In addition, we have analyzed the spatio-temporal
characteristics of two of these high-frequency type II bursts and compared the
derived from radio observations with those derived from multi-spacecraft CME
observations from SOHO/LASCO and STEREO coronagraphs.
