SkyRadar FMCW Base Module

OTUS - the Mid Range Radar

OTUS is SkyRadar's Mid-Range Radar for Civil Aviation, Urban Management and  Perimeter Surveillance, covering distances from 0 to > 1000 m. It operates with 24 GHz - requiring no operating permission in many countries. The radar communicates with the home-based via (W)-LAN. Many applications for civil monitoring or surveillance purposes are available.

The system is equipped with a horn antenna. It is protected against dust and splashing water, perfectly suited for outdoor operation. 

The product can be installed as a static radar or placed on a rotary tripod. The system is not suited for mobile or military applications.

General Features

  • Active radar, designed for perfectly save outside operation in mid-rangeOtus - Mid-range radar
  • Dust and splashing water protected (IP 54)
  • Modulation: FMCW
  • Antenna
    o   Horn Antenna
    o   Default operation 24 GHz
  • Powerful and fast radar image processor.
  • All measurements are performed in near-to real time. No sub‐sampling or substitution techniques.


System Features



Voltage Requirements  12V 
Carrier Frequency 24 Ghz
Modulation FMCW
Range 0 ... 1000 m
Resolution at 0 ... 100 m  1 m 
Dimensions 190 x 179 x 90 mm
Net Weight 10 kg
International Protection Marking (IP-Code) IP 54
Antenna Type Horn (with integrated Array)

The transmitter works with 1 emitting and 3 receiving channels and a very low phase noise.

The data of the 3 channels is digitized and processed in the Otus-radar, performing range and Doppler FFTs, benefiting of an update rate of 20 measurements per second.


The signal processing (range and velocity) is conducted through a 256 point FFT with an update rate of 50 ms.


Transmitter Features

Supply Voltage 12V
Supply Current 550 mA
Operating Temperature -20 … + 60 °C

Table: General operative characteristics of the Transceiver

  min. typ. max.
Transmitter Frequency 24 Ghz 24 GHz 24,250 Ghz
Transmitter Output Power (EIRP)   19 dBm  
Output Power Deviation   50 ppm  
Maximum Frequency Error   -3 dB  
Phase Noise     -90 dBc
Spurious Emissions     -30 dBm

Table : Operative characteristics of the Transmitter 


Receiver Features

  min. typ. max.
Receiver Sensitivity   -132 dBm  
Overal Sensitivity
                           at σ = 1 m2, r = 100m, S/N = 6dB
  -151 dBc  

Table : Operative characteristics of the Receiver 


Antenna Features

  min. typ. max.
Tx Antenna gain   15 dBi  
Polarisation   vertical  
Horizontal -3dB beamwidth, E-plane   30°  
Vertical     -3dB beamwidth, H-plane   20°  
Rx (Channels 1, 2, 3) Antenna Gain   15 dBi  

Table : Operative characteristics of the Antenna


Signal Processing

  • Amplification
    • Amplification of emitting channel Tx1
    • Amplification of raw signal (IQ signal) at receiver
    • Amplification of filtered signal possible
  • Filters and Signal Treatment
    The following filters and signal treatments are possible before interfacing the signal to a Intrusion Detection or Air Traffic Control system.
    • Sensitivity Time Control (STC)
    • Hamming
    • Hanning
    • Blackman
    • Blackmanharris
    • Signal Threshold and Limiter
    • Range Calibration and Extension
    • Cutting out selections of the signal range
    • Moving Target Detection and Indication
    • and more
  • Interface Formats
    • ASTERIX (latest format, as standarized by EuroControl)
    • JSON
    • Proprietary formats on request to interface with Intrusion Detection Systems and non-standard ATC systems

  • Optionally, SkyRadar can provide supervision screens for civil use.

Important notice: This radar has been developed for civil aviation and perimeter surveillance. It does not contain any specific military application.