ELLIPTICAL MULTIMODE FEEDS and DUAL-CHANNEL MICROWAVE ROTARY JOINT
Elliptical Multimode Feeds
Dual-channel Microwave Rotary Joint
Indigenously developed multimode dual feeds for feed the
pr ime focal r eflector antenna of Pencil beam scanning
Scatter ometer of Oceansat-II.
Heritage
The indigenously developed Dual-channel micr owave r otar y joint
with scanning antenna is alr eady flown in Pencil beam
Scatter ometer payload for Oceansat-II mission.
Heritage
The indigenously developed elliptical multimode feeds
integr ated with 1 m r eflector ar e alr eady flown in Pencil
beam Scatter ometer payload for Oceansat-2 mission.
Specifications
• Fr equency:
• Bandwidth:
• Retur n Loss:
• Amplitude taper
in el and az:
• Polar ization:
1 3 .5 GHz
 5 0 M Hz
1 7 dB
of co-polar patter n
1 5 .0  1 .0 dB in el
1 0 .0  1 .0 dB in az
Linear H-polar isation
Linear V-polar isation
M ultimode Elliptical Feed
Dual channel W aveguide Rotary Joint
Features
• Indigenous design and development
• M ulti-mode, shaped r adiation patter n
• Yields higher secondar y gain than conventional feeds
• V and H-polar ized feeds
Shaped pattern of M ultimode Elliptical Feed
SAC Product Catalogue
Specifications
• Fr equency:
1 3 .5 GHz
• Bandwidth:
± 2 5 M Hz
• Retur n Loss(dB): 1 9 dB
• Inser tion Loss(dB):0 .3 5 dB
• Isolation(dB):
4 0 dB
• Peak Power :
Peak 1 4 0 W , 3 4 % DC
• EM I/ EM C (Test– RE1 0 2 M il STD 4 6 1 E): 6 7 dB μVolt/ m
• Inser tion loss var iation within a single scan:0 .0 5 dB
Features
• Indigenous design and development
• Higher -or der waveguide modes
• Dual Channel high power application
• Rotation independent RF per for mance
• Low inser tion loss and high isolation
HIGH POWER SHAPED BEAM ANTENNA
Comparison of Elevation Plane Pattern at 5.35 GHz with Simulated
20
5.35
5.35
5.35
5.35
15
High Power Beam Forming Network
10
GHz (Measred Cross Pol)
GHz Meas ured Co Pol ( H Port)
GHz Meas ured Co Pol (V Port)
GHz Co Pol (Sim ulated)
5
0
Power in dB
Indigenously designed & developed high power multilevel beam for ming networ k feeding
multilayer pr inted antenna for shaped patter n to incr ease SNR for SAR Applications. The
patter n shape will help in r educing the r equir ement of sensitivity time contr ol cor r ection at
r eceiving end.
-5
-10
-15
-20
-25
-30
Null per tur bation patter n synthesis technique has been
applied to get the minimum r ipple of 0 .5 dB within
4 0 3 5 degr ees.
Heritage
The high power beam for ming networ k has employing
squar e coaxial line has been integr ated with C-Band SAR
system on Beach air cr aft and being used extensively for
disaster management.
8 W ay Power Combiner
Square Coaxial
-35
-40
-80
-70
-60
-50
-40
-30
-20
-10
0
10
20
30
40
50
60
70
The ta in De gre e s
Specifications
Inner Conductor of Power Combiner
SQL Power Combiner Feeding
M ultilayer Printed Antenna
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Oper ating Fr equency: 5 .3 5 GHz (C-band)
Bandwidth:
2 2 5 M Hz
Retur n Loss :
<-1 5 dB
Shaping Angular Extent: > 3 5 deg
Power :
8 kW (P-P)
Duty Cycle :
upto 5 %
Polar ization :
Dual Linear
Ripple Level in Shaped Region : < 0 .5 dB
Features
• Low loss tr ansition fr om Squar e Coaxial to Squar e Coaxial,
Squar e Coaxial to M icr ostr ip and waveguide to Squar e Coaxial
• Patter n synthesis with minimum r ipple
80
PLANAR MICROSTRIP ANTENNA
Wide Band Dual Polarized Microstrip Antenna
Array
C- Band Dual Polarized Microstrip Antenna
Indigenously developed W ide Band Dual Polar ized M icr ostr ip
Antenna Ar r ay having 2 4 % bandwidth with scanning of ±1 5
degr ee can be used for communication, r emote sensing, and
gr ound segment payloads.
Indigenously developed W ide Band Dual Polarized M icr ostr ip
Antenna Ar r ay oper ating at C-band having 5 % bandwidth with
scanning of ±1 5 degr ee can be used for communication, r emote
sensing, and gr ound segment payloads
Heritage
This antenna has been used in tile antenna for ISRO r adar
pr ogr am.
Heritage
This antenna was used in Radar Imaging Satellite RISAT-1 .
Specifications
• Oper ating fr equency:
• Retur n Loss:
• Gain of 8 x6 Element Tile:
• Gain Flatness:
• Polar ization Isolation:
• Scanning:
Tile Antenna at L-band
Specifications
• Oper ating fr equency:
5 .2 -5 .5 GHz
• Retur n Loss:
< -1 5 dB
• Gain of 2 4 x2 0 Elements Tile: 3 2 .5 dB
• Gain Flatness:
± 0 .5 dB
• Polar ization isolation:
< -3 5 dB
• Scanning:
±1 5 0
1 .1 – 1 .4 GHz
< -1 0 dB
2 2 dB
± 1 dB
< -3 5 dB
±1 5 0
Features
• Br oadband per for mance (RL per for mance is 3 0 %)
• High Gain and High Efficient Antenna System
• High Cr oss polar ization Level
• Scanning upto ± 1 5 degr ee
• Compatible for mounting T/ R modules on the antenna.
SAC Product Catalogue
Tile Antenna at C-band
Features
• Br oadband per for mance
• High Cr oss polar ization Level
• Scanning upto ± 1 5 degr ee
• Compatible for M ounting T/ R modules on the antenna.
ORTHO MODE TRANSDUCER (OMT)
Broadband Ortho-mode Transducer
Dual band Ortho-mode Transducer
Indigenously developed OM T having br oadband (2 0 %
BW ) per for mance, high r etur n loss, high polar ization
isolation, and low inser tion loss. The OM T can be used
for communication, r emote sensing, and gr ound
segment payloads
Indigenously developed dual band OM T at 2 3 .8 GHz & 3 1 .5 GHz
for dual polar ized antenna system for communication, r emote
sensing, and gr ound segment payloads
Heritage
Br ead-boar d model have been developed successfully.
The OM T have been integr ated with antenna feed
system for final payload system integr ation.
Specifications
Oper ating fr equency:
Retur n Loss:
Inser tion Loss:
Polar ization isolation:
5 0 – 6 0 GHz
< -1 8 dB
> -0 .6 dB
< -3 8 dB
Turnstile junction broadband OM T
Heritage
Br ead-boar d model have been developed successfully. The OM T
have been integr ated with antenna feed system for final payload
system integr ation.
Specifications
• Oper ating fr equency:
Backward coupler broadband OM T
Features
• Br oadband per for mance
• Low inser tion loss
• High polar ization isolation
• RF design suited for fabr ication at M M W fr eq. band
• Less volume
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2 3 .8 GHz± 1 5 0 M Hz
3 1 .5 GHz ± 1 5 0 M Hz
Retur n Loss:
< -1 9 dB
Inser tion Loss:
> -0 .5 dB
Polar ization isolation: < -3 5 dB
Fr equency isolation:
< -2 2 dB
Features
• Dual band per for mance
• Low inser tion loss
• High polar ization isolation
• RF design suited for fabr ication
Backward Coupler Dual band OM T
Turnstile Junction Dual band OM T
ORTHO MODE TRANSDUCER (OMT)
C /Ku Ortho Mode Transducer
Features
The C/ Ku Or tho M ode Tr ansducer (OM T) finds use in
combined C/ Ku Ear th Stations . It effects both
polar ization and fr equency diplexing acr oss C and Ku
bands
• Combined C/ Ku oper ation
• Low Inser tion Loss
• High Isolation
• Compact size
• Simple fabr ication
Heritage
The OM T is par t of the Bopal Ear th Station [C band]
and 1 1 m M CF Ear th station [Ku band].
Specifications
• Oper ating Fr equency :
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SAC Product Catalogue
C Band
3 .7 – 4 .2 GHz
Ku Band 1 0 .9 5 – 1 2 .7 5 GHz
Polar ization :
Dual - Linear [ Lin- V/ Lin- H ]
VSW R :
1 .6 5 max
Inser tion Loss :
0 .7 dB max
Polar ization Isolation : 3 5 dB min
Ku- to C-Band Isolation : 7 0 dB min
DUAL OFFSET GREGORIAN ANTENNA
23-31 GHz Offset Gregorian Antenna
50-60 GHz Offset Gregorian Antenna
Heritage
DVM successfully developed and integr ated with mm wave payload
system
Heritage
DVM successfully developed and integr ated with mm wave payload
system
Specifications
 Oper ating Fr equency:
 Beam Efficiency:
 Side-lobe Level:
 X-Pol :
Specifications
 Oper ating Fr equency:
 Beam Efficiency:
 Side-lobe Level:
 X-Pol:
2 3 -3 1 GHz
> 95%
< -2 9 dB
< -2 4 dB
Features
 3 6 0 deg. Ver tical Scanning capability
 High Beam Efficiency
 Compact in volume
5 0 -6 0 GHz
> 95%
< -2 9 dB
< -2 4 dB
Features
 3 6 0 deg. Ver tical Scanning capability
 High Beam Efficiency
 Compact in volume
2 3 -3 1 GHz Offset Gregorian Antenna
5 0 -6 0 GHz Offset Gregorian Antenna
MULTIMODE FEED HORNS
Spline-Profile Multimode Feed horn
Profile Corrugated Feed horn
Specifications
 Fr equency :
 Retur n loss :
 Inser tion loss:
 Cr oss-pol.:
Specifications
 Fr equency :
2 3 -3 1 GHz
> 1 7 dB
< 0 .1
< -3 5 dB
Profile corrugated horn at Ka band
Features
Achieved 4 0 % r eduction in
conventional cor r ugated hor ns
length
compar ed
Spline Profile horn at mm-band
Features
It is alter native to cor r ugated hor n, Less fabr ication complexity
to
Profile Corrugated Feed horn
Specifications
 Fr equency :
 Retur n loss :
 Inser tion loss:
 Cr oss-pol.:
8 9 ±1 .5 GHz
1 6 7 -1 9 5 GHz
 Retur n loss : > 1 7 dB
 Inser tion loss : < 0 .1
 Cr oss-pol. :
< -3 0 dB
Spline-Profile Feed horn and Septum Polariser at
X-band
Profile corrugated horn at V band
5 0 -6 0 GHz
> 1 7 dB
< 0 .1
< -3 5 dB
Features
Achieved 4 0 % r eduction in
conventional cor r ugated hor ns
Specifications
 Fr equency : 7 .1 4 5 - 7 .1 9 GHz
8 .4 0 - 8 .4 5 GHz
 Polar isation : RHCP
 Retur n loss : > 1 7 dB
 Cr oss-pol. : < -2 0 dB
length
compar ed
to
Spline Profile horn at W band
SAC Product Catalogue
Features
Ver y compact in volume and light in weight
UWB ANTENNA for GROUND PENETRATING RADAR
UWB VIVALDI ANTENNA for GPR
Features
The indigenously developed UW B Vivaldi antenna can
be used for por table, low cost, mass pr oduced
commer cial GPR systems for the study of snow cover
and sea ice thickness, landmine detection and
ar chaeological and geo-physical investigations.
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Heritage
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This antenna integr ated with system har dwar e was
successfully used for glacier studies at M anali. This
GPR system will be used at Antar ctica for glacier
studies.
Specifications
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Ultr a wideband bandwidth per for mance (M easur ed r etur n loss
bandwidth of 2 0 4 %)
Antenna per for mance r elatively independent of tar get
gr ound pr oper ties
Small size, and planar for m with pr ovision
for mounting on thr ee sides
Integr ated with r adome and field tests car r ied out
successfully
Rugged yet light weight
Uses pr inted cir cuit boar d technology and commer cial
gr ade FR-4 mater ial, hence suitable for low cost mass
pr oduction
Vivaldi Antenna
Oper ating Fr equency : 2 5 0 – 7 5 0 M Hz
Retur n loss :
Better than 1 0 dB
Polar ization :
Linear
Radiation Patter n :
Unidir ectional
Gain var iation over band: Smooth
Beam width :
~ 60˚ x ~ 60˚
M ass :
< 6 0 0 gm
Dimensions :
4 6 0 mm x 4 6 0 mm x 3 mm
Isolation between Tx and Rx : > 3 0 dB
M easured Radiation Pattern at 7 5 0 M Hz
Integrated GPR System
M easured Return Loss