English to Russian Science Physics

In the first approach (Fig. 1), a microwave signal was
registered by a B-dot loop (item L1, Fig. 1) placed at the
input of the horn antenna. A reflector (item 5, Fig. 1) and
waveguide phase shifter (ATM-WR-410) (item 4, Fig. 1) was
placed between the magnetron and antenna.
The minimum in amplitude
of the reflected signal from this B-dot loop corresponds to
the resonance frequency of the NR.