ceramic materials for DRA

hii
plz tell me the details of companies in india related to ceramic materials which have the low loss ceramic materials for microwave antennas applications.

plz also tell me where is the facility of dielectric measurement of solid ceramic materials at microwave frequencies are avalilable in india.

plz reply as soon as possible.

for materials concern with SMST, IT BHU Varanasi.
and dielectric measurement facility present at Electronics Deptt IT BHU met ravi kumar gangwar.