SOURCE: PARSHURAM/ FOR MY TAKE / IDRW.ORG
As the blessings of in-house R&D and Indigenous Manufacturing, Brand-new variants of the LCA Tejas just keep on coming. After Tejas Mk-1A, Tejas LIFT, Tejas MAX, the newest member of the family seems to be Tejas EW. There’s something wonderful about this whole development which could prove to be a “Gamechanger” for the Indian Defence Industry.
It can be that we’re a bit late in the era of Airborne EW. But what we will be doing with the Tejas EW, is that we will be pioneering a new category of EW Aircrafts – The Lightweight Category. Be it the Italian M-346, Russian Yak-130, S Korean FA-50, British Hawk-200, or Chinese JL-10 – None of them have a dedicated EW variant yet in service.
As per available information, ADE is planning to incorporate 3 Low-Drag GaN ASPJ Pods on the Tejas along with the GaAs UEWS Internal Suite. The UEWS has a peak power of around 30 Watts. The ASPJ will have a peak power of around 3.75 kW, 3 of them working in tandem making it 11.25 kW. So all of them create a Combined EIRP (Effective Isotropic Radiated Power) of around 11.28 kW.
Baseline ASPJ V/s LowDrag ASPJ
This seems good for a Light Combat Aircraft. However, it has the potential to be vastly improved upon in line with the E/A-18G Growler. The E/A-18G uses ALQ-99 Jamming Pods equipped with a Frontal RAT or Ram Air Turbine. This gives the pods access to a secondary source of power along with the power provided by the Engines. Thus, Each ALQ-99 generates 6.40 kW even after being made with GaAs modules. With the upcoming NGJ Pod comes a larger Midbody RAT along with GaN Modules uplifting its power as high as 19 kW. The Growler would carry 5 of these pods creating a Combined EIRP of whopping 95 kW making it capable of performing a far safer Stand-off Jamming while staying behind the Fighter Strike-Package.
Frontal RAT ALQ-99 V/s Midbody RAT NGJ
“If such a Midbody RAT section can be added in the subsequent versions of the ASPJ, it will be capable of generating around 12.5 kW. Further, Deep integration of the Uttam AESA Radar with the Tejas’s EW System will enable it to enact as a jammer on it’s own & add another 7.4 kW of power. If the current GaAs Uttam and UEWS are swapped with GaN variants of the same in near future, then they would be able to generate a Jamming-power of 18.56 kW.
Together, GaN Uttam, ASPJ Mk-2 & GaN UEWS will be churning a Combined EIRP of 56.06 kW compared to the earlier 11.28 kW of Tejas EW & 30 kW of the current E/A-18G Growler.
Such a level of Jamming-power might not be able to cloak a Strike Package of HO Aircrafts like the Su-30 MKI [15 m²] from LR-SAMs designed for 4th Gen Aircraft like the S-400, but would certainly be able to do so for a Strike Package of MO/LO Aircrafts such as the Tejas Mk-1A, MWF, Mirage or Rafale – Which themselves would be carrying 1 SPJ of their own. 2 Rudram-1 Anti-Radiation Missiles with a range of 250 Km planned to be carried by each Tejas EW would be the final icing on the cake.
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