Posttest-reviewed.docx

Republic of the Philippines

Bulacan State University City of Malolos, Bulacan Name (optional): ________________________ Course/Year/Section: ____________ AR/Non-AR: __________ FILL IN THE BLANKS. Fill each blank with the correct answer. Write your answer on the space provided.

Date: ______________ Score: _____________

5. What is the radiation pattern of this antenna?

Commented [Benjie1]: Kahit ako di ko magets anong antenna ung nasa drawing hehe

y

1. If a reflector is placed at the right of the DIPOLE ANTENNA, draw its new radiation pattern.

x

y y x

6. The radiation pattern of the BOW TIE x

ANTENNA is similar to the radiation pattern of ___________.

7. What is this part of the antenna called? 2. In the radiation pattern of a MONOPOLE ANTENNA, lobes pointing ____________ appear if antenna is more than a wavelength long, or if the ground plane is smaller than needed. _________________ 3. The most common electrical length of a MONOPOLE ANTENNA is ______ long. 8. Receiving antennas must be of the _________ polarization as the transmitting antenna in order to 4. The _____________ the gain of the antenna, the

receive the signal.

more directive the waves propagate. 9. In a YAGI-UDA ANTENNA, a higher number of elements results in a ___________ gain.

Commented [Benjie2]: Mali ung tanong kasi ung director lang ung pedeng more than 1 element hehe

10. Draw the ORIENTATION of a DIPOLE

16. __________________ is an antenna used in TV

ANTENNA that will receive the maximum amount

receivers. It consists of both driven and parasitic

Commented [Benjie3]: physical

elements. 17. What is the radiation pattern of this antenna in

y

Commented [Benjie7]: Baka you mean draw?

y y

x x

x

of signal from the antenna to its left? its AXIAL MODE?

11. The spacing between the elements in an END

18. ___________________ is an antenna used in

FIRE ARRAY is ______ long.

mobile phones.

Commented [Benjie4]: di nyo naman sinabi kung unidirectional or bi-directional ung radiation kas magkaiba sagot jan depende dun Commented [Benjie8]: Madami din antenna for mobile depende sa era

12. This is the most theoretically simple and most 19. What antenna has a clover leaf-shaped radiation

used class of antenna. _________________.

pattern? ___________________

Commented [Benjie5]: mejo kulang ung info para masagot

13. A class of antenna which consists of a single element mounted perpendicularly to a conductive

20. FM radio antennas are mostly mounted upright.

surface. ______________________.

What is its polarization? _______________

14.

What

is

the

radiation

pattern

of

this

Commented [Benjie9]: 2D lang ung drawing neto

that radiates in the x axis.

BROADSIDE ANTENNA? y

y

21. Draw a 3-ELEMENT BROADSIDE ARRAY Commented [Benjie6]: 2S ung drawing dito baka di nila makuha hehe saying pagka augmented ng thesis

y

x

x

x

15. __________________ is the antenna used in walkie-talkies; made to be flexible and is protected by a rubber or plastic case.

22. Which receiving antenna receives better signal

26. Draw a 3-ELEMENT YAGI-UDA antenna that

from the antenna in the middle?

radiates in the +z axis.

Commented [Benjie10]: Hindi yagi ung antenna kasi hindi folded dipole ung driven element

27. The spacing between the elements in a

y

Commented [Benjie13]: Nawalang ng axis para drawingan

BROADSIDE ANTENNA is _______ long. Antenna No.1

Mali din ung mga directors kasi mali ung pantay sila lahat hehe

Antenna No.2

28. The radiation pattern of the MONOPOLE ANTENNA depends on the ____________ of the Commented [Benjie14]: Kahit ako di ko nagets hehe

signal, which is how long the wave is in space. x

29. The conductive surface in a MONOPOLE ________________________

ANTENNA is called the __________________.

23. When mounted VERTICALLY, are the radiation

pattern

of

OMNIDIRECTIONAL

dipole or

y

antennas

DIRECTIONAL?

___________________

x

24. The _________ is the most common type of the

Commented [Benjie11]: Dipole antenna na nga ung sagot hehe

DIPOLE ANTENNAS, having its length at 0.5 lambda.

25. Side lobes of a DIPOLE ANTENNA appears if

30. Draw a 3-ELEMENT END-FIRE ARRAY that

the electrical length is more than _______ long.

radiates

in

the

y

axis.

Commented [Benjie12]: Forced to be Kasi lambda/2 kasi sya hindi ung talaga binabago kaya tingin ko mali din ung tanong hehe Commented [Benjie15]: UNI or BI directional? Misleading ung tanong

z

x