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HIGH FREQUENCY AS A WEAPON

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Het toepassen van de beginselen van de elektronische oorlogsvoering (EOV) tijdens de tweede wereldoorlog. Gebruik van stoorzenders, uitluisteren van verbindingen, gebruik van chaff om...

ORIGINS OF ELECTRONIC COUNTERMEASURES

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Almost from the outset, the development of radars was accompanied by the development of technologies to defeat them, or "electronic countermeasures (ECM)". The first...

CONTINUOUS WAVE RADARS

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Simple continuous wave detectors and radars were discussed in the previous chapter. During the war, "proximity fuzes" were developed for anti-aircraft gun shells, allowing...

IFF, RADAR BEACONS, & RADAR REFLECTORS

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The invention of radar to track aircraft immediately led to the issue of how to distinguish "friendly" aircraft from "hostile" aircraft. If an aircraft...

AI, ASV, & AEW RADARS / RADAR DISPLAYS

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If fighters were sent up against intruders in daylight and clear weather, ground-based radars could generally get them close enough to perform an interception...

TRACKING RADARS / LOBE SWITCHING / CONICAL & HELICAL SCANNING

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The search radar / height finder radar combination was fine for vectoring fighters against intruders, but antiaircraft guns needed a single radar that could...

SEARCH RADARS PPI and HEIGHT FINDERS

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The sort of simple pulse radar system described in the previous chapter was more or less available at the beginning of World War II,...

CW ALARM SYSTEMS / DOPPLER SHIFT

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The simple pulse radar described above was actually preceded in the prewar timeframe by simpler systems that consisted of a transmitter sending a signal...

THE RADAR RANGE EQUATION

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The tools provided so far give enough information for understanding the "radar range equation", the most fundamental formula for radar operation. As its name...

TRIODES & MAGNETRONS

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Early radars were based on traditional vacuum-tube technology. The basic classic vacuum tube was the "triode", which consisted of a vacuum-sealed tube with plates...