TRANSMITTING EQUIPMENT FOR SMALL UAV: ENGINEERING, DEBUGGING, EXPERIMENT
A. Yu. Sheremet
National Research University of Electronic Technology
The paper is received
on December 1, 2013
Abstract. The research objective is engineering and
experimental research of SAR transmitter, designed for installation on small
UAV. There were designed mockups of transmitter with quadrature conversion and
BPSK modulator. Also problems of electromagnetic compatibility, occurrence of
parasitic feedback in space, and optimal variant of transmitter selected are
considered. In contrast to classic microwave devices, we use screws to fix PCB.
Therefore there are problems of bending microwave PCB and bad, point contact
with housing. A distinctive feature of the radar is 9,5±0,5 GHz operating band
with 0.6 dB flatness. The result is assembled transmitter, conforming required
specification. Variant with BPSK modulator was selected because there is very
low power out-of-band radiation, lower power consumption, reduced dimensions
and simple tuning. Radar was tested on the ability to install to the UAV, also
there are was synthesized map from the plane. Under laboratory conditions was achieved 25 cm range resolution.
Keywords: UAV radar, wideband transmitter,
high resolution SAR, radar hologram.