AIRBORNE SAR 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.