Paper
21 October 2016 Multibeam monopulse radar for airborne sense and avoid system
Ashok Gorwara, Pavlo Molchanov
Author Affiliations +
Proceedings Volume 9986, Unmanned/Unattended Sensors and Sensor Networks XII; 998604 (2016) https://doi.org/10.1117/12.2238071
Event: SPIE Security + Defence, 2016, Edinburgh, United Kingdom
Abstract
The multibeam monopulse radar for Airborne Based Sense and Avoid (ABSAA) system concept is the next step in the development of passive monopulse direction finder proposed by Stephen E. Lipsky in the 80s. In the proposed system the multibeam monopulse radar with an array of directional antennas is positioned on a small aircaraft or Unmanned Aircraft System (UAS). Radar signals are simultaneously transmitted and received by multiple angle shifted directional antennas with overlapping antenna patterns and the entire sky, 360° for both horizontal and vertical coverage. Digitizing of amplitude and phase of signals in separate directional antennas relative to reference signals provides high-accuracy high-resolution range and azimuth measurement and allows to record real time amplitude and phase of reflected from non-cooperative aircraft signals. High resolution range and azimuth measurement provides minimal tracking errors in both position and velocity of non-cooperative aircraft and determined by sampling frequency of the digitizer. High speed sampling with high-accuracy processor clock provides high resolution phase/time domain measurement even for directional antennas with wide Field of View (FOV). Fourier transform (frequency domain processing) of received radar signals provides signatures and dramatically increases probability of detection for non-cooperative aircraft. Steering of transmitting power and integration, correlation period of received reflected signals for separate antennas (directions) allows dramatically decreased ground clutter for low altitude flights. An open architecture, modular construction allows the combination of a radar sensor with Automatic Dependent Surveillance – Broadcast (ADS-B), electro-optic, acoustic sensors.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ashok Gorwara and Pavlo Molchanov "Multibeam monopulse radar for airborne sense and avoid system", Proc. SPIE 9986, Unmanned/Unattended Sensors and Sensor Networks XII, 998604 (21 October 2016); https://doi.org/10.1117/12.2238071
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Cited by 1 scholarly publication.
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KEYWORDS
Radar

Antennas

Sensors

Eye

Target detection

Receivers

Signal detection

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