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10. Put these words in the right order to make sentences.

1. An / a / transducer / antenna / is / that / transmits / electromagnetic / or / receives / waves.

2. The / first / were / rudimentary / built / antennas / by / 1888 / in / Heinrich Hertz /.

3. There / two / are / directional / fundamental / of / antenna / types / patterns.

4. A / a / the / Hertzian / not / antenna / presence / does / require / of / for / ground / its / operation /.

5. Small / for / antennas / preferred / are / usually / convenience /

6. The / the / of / word / antenna / relative / is / to / to / wireless / apparatus / attributed / origin / Guglielmo Marconi /.

7. Antennas / its / are / any / radiotransmitter / in / order / electromagnetic / to / couple / electrical / connection / to / required / by / receiver / or / the / field /.

8. Resonant / be / resonant / expected / to / used / around / a / are / antennas / particular / frequency /.

11. Match the first part (1-7) of the sentence with the second one (a-g).

1. Isotropic radiator is …

2. Dipole antenna is …

3. Yagi-Uda antenna is …

4. Random wire antenna is …

5. Horn is …

6. Parabolic antenna …

7. Patch antenna is …

a) … used where high gain is needed, the wavelength is short (microwave) and space is not an issue.

b) … a radio frequency antenna consisting of a wire whose length does not bear a relation to the wavelength of the radio waves used, but is typically chosen more for convenience.

c) … a popular antenna type, consists of a square conductor mounted over a groundplane.

d) … a radio antenna that can be made by a simple wire, with a center-fed driven element.

e) … a theoretical point source of waves which exhibits the same magnitude or properties when measured in all directions.

f) … a directional antenna system consisting of an array of a dipole and additional closely coupled parasitic elements.

g) … a high-gain reflector antenna used for radio, television and data communications, and also for radiolocation (radar).

12. Read and translate the sentences paying attention to the Sequence of Tenses:

1. If it were possible to live on the moon, people would be able to jump about six times as high as they could on earth.

2. Unless there were some inexhaustible reservoirs of energy in the sun, life on earth could not exist.

3. If there were atmosphere and water on the moon it would not probably be a dead would.

4. If you look at the horizon immediately after sunset, you will often see a very bright star, Venus.

5. Could our observations have been supported theoretically, they would have done much to advance our knowledge in the field of radioactivity.

6. The librarian didn’t think the students would have taken their books to the library by the following week yet.

7. Euclid proved that the three angles of a triangle are equal to two right angles.

8. The passage is so difficult that I cannot comprehend it.

13. Put the verbs in brackets into the correct form and translate the following conditional sentences into Ukrainian:

1. If it (to be) possible to live on the moon, people would be able to jump about six times as high as they could on earth.

2. If there were no atmosphere, the surface of the earth (to become) very, very hot by day and too cold at night.

3. If there (to be) atmosphere and water on the moon it would not probably be a dead would.

4. If you look at the horizon immediately after sunset, you (to see) a very bright star, Venus.

5. If we not (to raise) the temperature, the pressure would not increase.

6. If we had time enough, we (to repeat) our experiment.

7. If we (to solve) the problem of controlled thermonuclear reactions, we could use oceans of fuels.

8. If they (to complete) the research, the results would have been discussed at the conference.

9. It would be better if some experiments (to repeat).

10. If a new telephone system (to install) on the line we should be able to improve the reliability of telephone service.

11. If we not (to raise) the temperature, the pressure would not increase.

12. If he had worked hard last term, he (to pass) his exam.

13. If I (to be) an engineer I should repair this device.

14. If we (to have) enough time, we should attend the conference.

15. It (to save) you a lot of time if you had prepared for your experiment more carefully.