science

RBE2

RBE2 is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand RBE2 rather than just read about it. In short: The RBE2 (Radar à Balayage Electronique 2 plans) is a multirole radar developed during the 1990s for the Dassault Rafale, a French combat aircraft. The original RBE2 is a passive electronically scanned array.

Key takeaways

RBE2 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect RBE2 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of RBE2 from memory before moving on to harder problems.

Reference excerpt

The RBE2 (Radar à Balayage Electronique 2 plans) is a multirole radar developed during the 1990s for the Dassault Rafale, a French combat aircraft. The original RBE2 is a passive electronically scanned array. This has since been developed into the RBE2-AA, an active electronically scanned array.

Development

RBE2 Development of the RBE2 began in 1989 as a joint project between Thomson-CSF's RCM division and Dassault Electronique which merged in 1998 to form Thomson-CSF Detexis. Development was continued by Thomson-CSF's successor company, Thales Group. The RBE2 is a passive electronically scanned array (PESA), an electronically scanned radar with a single transmitter. Flight trials of the RBE2 began in 1992 and the first production radar was delivered in May 1997.

RBE2-AA In April 2002, the French defence procurement agency, Délégation Générale pour l'Armement (DGA), awarded Thales Group a contract to develop an active electronically scanned array (AESA) radar demonstrator based on the RBE2 radar. The resulting RBE2-AA (active array) variant has been tested on a Mirage 2000 testbed aircraft from the Flight Test Center of the DGA and then on a Rafale. While the first tests were made with American transmitter-receivers, the current radar features parts manufactured by Thales. The radar uses about 838 GaAs T/R modules. In July 2004, DGA awarded a 90 million-euro contract for the development of a second a AESA radar demonstrator. Production of the RBE2-AA commenced in 2008 and entered service in 2013. On 15 December 2025, India-based SFO Technologies received a contract to supply complex wired structures for the RBE2 AESA radar for the Rafales ordered by the Indian Navy.

RBE2-XG The next phase of evolution for the RBE2-AA is the RBE2-XG. Being developed by Thales, it is a GaN AESA radar which reportedly offers upto 30% increased range over its predecessor. Additionally, it has a better processing capability against multiple simultaneous tracks, along with a greater resistance to jamming and active decoys. As of 2025, the programme is reportedly running on a delay of 8 years and would only be available for integration by 2027.

See also Optronique secteur frontal (OSF) Euroradar CAPTOR

References

External links Thales Group: Active Electronically Scanned Array - AESA RBE2 radar

Illustrations

Worked examples

Example 1 — a first encounter with RBE2

Start with the simplest possible case. Write down what RBE2 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to RBE2 before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about RBE2 ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of RBE2

In research: RBE2 appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses RBE2 in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: RBE2 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Aircraft radars, Military aviation stubs, Military radars of France, so understanding it makes those chapters shorter.
In everyday life: Look for RBE2 outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study RBE2 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what RBE2 means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain RBE2 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is RBE2 in simple terms?

Why does RBE2 matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study RBE2?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on RBE2.