Добавил:
Upload Опубликованный материал нарушает ваши авторские права? Сообщите нам.
Вуз: Предмет: Файл:
методичка-(5курс)2ч.doc
Скачиваний:
0
Добавлен:
01.05.2025
Размер:
388.1 Кб
Скачать

14. Translate these paragraph in the written form.

Радар з'явився під час другої світової війни, але в даний час широко застосовується в мирних цілях. Це пристрій використовується для виявлення і визначення місцеположення різних предметів і цілей. Радар - дуже точний пристрій, і дальність його дії дуже велика. За допомогою радара можна точно визначити дальність, висоту і азимут будь-якої мети незалежно від того, чи знаходиться вона в повітрі, на землі чи на морі. Отримані дані вказуються на різних індикаторах залежно від типу переданих даних.

16 Your teacher asked you to write an essay about the radars. Write an essay to the plan below:

- kinds of radars;

- radar modulators;

- the importance of radars;

- their applications.

Write a letter of at least 160 words about this, using the words and words combinations from the box:

Signals, reflected, emits, radio waves, frequency, transmitter, devices for detecting, warfare and civilian applications.

17. Read the supplementary text and entitle it. Translate the text into Ukrainian and put 15 different questions.

A phased array is a group of antennas in which the relative phases of the respective signals feeding the antennas are varied in such a way that the effective radiation pattern of the array is reinforced in a desired direction and suppressed in undesired direction. Phased array transmission was originally developed in 1905 by Nobel Laureate Karl Ferdinand Braun who demonstrated enhanced transmission of radio waves in one direction.

An antenna array is a multiple of active antennas coupled to a common source or load to produce a directive radiation pattern. Usually the spatial relationship also contributes to the directivity of the antenna. Use of the term "active antennas" is intended to describe elements whose energy output is modified due to the presence of a source of energy in the element or an element in which the energy output from a source of energy is controlled by the signal input.

An antenna array is a group of radiators whose currents are of different amplitudes and phases. They use electromagnetic wave interference phenomena to enhance the radiative signal in the desired direction and diminish it in the non-desired direction. Antenna arrays are the solution to the problem defined as the limitations of operating a single antenna. Phased array radar systems are also used by warships of many navies. Phased array radars allow a warship to use one radar system for surface detection and tracking (finding ships), air detection and tracking (finding aircraft and missiles) and missile uplink capabilities. Prior to using these systems, each surface-to-air missile in flight required a dedicated fire-control radar, which meant that ships could only engage a small number of simultaneous targets. Phased array systems can be used to control missiles during the mid-course phase of the missile's flight. During the terminal portion of the flight, continuous-wave fire control directors provide the final guidance to the target. Because the radar beam is electronically steered, phased array systems can direct radar beams fast enough to maintain a fire control quality track on many targets simultaneously while also controlling several in-flight missiles.