Throughout the long-term researching and developing activity "Kosmos" has projected and produced several types of antennae with the different purposes and electrical characteristics.
Such development has required development and production of great number of antennae filters and antennae deflector, as well as other elements in the antenna - feeder system.
 | ANTENNAS PRODUCTION PROGRAMME |
| ANTENNA SYSTEMS |
| JAMMING ANTENNA SYSTEMS |
| SYSTEMS FOR AZIMUTH DETERMINATION |
| TESTING OF ANTENNAE CHARACTERISTICS |
| Wide-band directional antennas |
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linearly polarized logarithm antennas |
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bipolarized logarithm periodical antennas |
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linearly polarized cam funnel antennas |
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bipolarized cam funnel antennas |
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planar spiral antennas |
| Narrow-band directional antennas |
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bipolar antennas of all types |
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funnel antennas of all types |
| Reflector antennas (linearly polarized, circle polarized or bipolarized) |
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parabolic cylinders (focus and offset) |
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paraboloides (focus and offset) |
| All direction antennas |
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bioconical antennas |
| Antennas systems of low and high power |
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antennas series |
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cassegrian antennas |
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antenna systems with special purpose |
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azimuth determination in L, S and C range |
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jamming systems in L, S and C range |
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monopulse funnel and reflector antennas |
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radar antennas of high power |
| Development of antennas and and antenna system for special destination |
| High power antenna systems |
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"Kosmos" has possibility to produce high power antenna systems |
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production of radar antenna systems for general and special purpose |
| Cassegrians antenna |
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high power antenna system |
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excitation of hyperbolic sub reflector with monopulse funnel with the outputs for SVMM and difference in both places |
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X - range frequency |
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pulse power 80 kW |
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efficiency factor 36 dB |
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high of side lobe 17 dB |
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beam with in both planes 1,80 |
| Used in L, S and C range |
| Medium radiation power antenna is 400 W |
| Type of antenna: parabolic reflector in off-set mode |
| Radiates EMF with horizontal and vertical polarization |
| By turning the excitation the polarization is changed |
| Efficiency factor |
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>16 dB for L range |
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>25 dB for S range |
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>25 dB for C range |
| Beam width in both planes: |
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<200 for L range |
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<110 for S range |
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<100 for C range |
SYSTEMS FOR AZIMUTH DETERMINATION
| Frequency range 1-8 GHz |
| Azimuth measurement in range 3600 with direct jumps of 300 |
| Azimuth measurement at each radar pulse |
| Polarization, inclined +450 |
Systems for azimuth determination cover wide frequency range, divided in octave working ranges of each individual system. System for azimuth determination consists of:
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antenna part |
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microwave processing |
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video processing |
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data processing unit |
Antenna system consist of three wide-band antennae (log-periodical type LPT3 in L range, and in S and C range collar antennae type DR24 and DR48), all direction antenna and positioning system.
In the part off microwave and video processing the necessary signal levels are provided for work of data processing unit in which the azimuth is determined according to suitable algorithm.
Beside azimuth measurement, the system is used for measurement of received signals intensity. The system weight is maximum 75-100 kg.
TESTING OF ANTENNAE CHARACTERISTICS
The measurement of electrical parameters (amplitude and phase characteristics, polarized patterns. VSWR, ...) for smaller dimensions antennae is performed in electro-magnetic anechoic chamber.
High - quality measurement of electrical parameters can be performed for frequency range (1-8) GHz.
For bigger dimensions antennae, the measurement is performed out of anechoic chamber.
All climate - mechanical testing are performed in special chambers.
