The parasitic array can be rotated to receive or transmit in different directions. What is the name given to such an antenna?

The parasitic array can be rotated to receive or transmit in  different directions. What is the name given to such an antenna?
by

1 Answer

Answer :

Rotary array.
by

Related questions

What characteristic allows the same antenna to both transmit and receive?

Description : What characteristic allows the same antenna to both transmit and receive?

Last Answer : Reciprocity.

In order to get maximum radiation to all surrounding points in the horizontal plane, the antenna used is a A. vertical loop B. vertical quarter-wavelength rod C. array which includes parasitic elements D. a horizontal Hertz dipole

Description : In order to get maximum radiation to all surrounding points in the horizontal plane, the antenna used is a A. vertical loop B. vertical quarter-wavelength rod C. array which includes parasitic elements D. a horizontal Hertz dipole

Last Answer : B. vertical quarter-wavelength rod

The reflector and director of an antenna array are considered as A. Parasitic elements B. Transcendental elements C. Feed-points D. Driven elements

Description : The reflector and director of an antenna array are considered as A. Parasitic elements B. Transcendental elements C. Feed-points D. Driven elements

Last Answer : A. Parasitic elements

What is the advantage of adding parasitic elements to a Yagi array?

Description : What is the advantage of adding parasitic elements to a Yagi array?

Last Answer : Increased gain.

What are the disadvantages of the parasitic array?

Description : What are the disadvantages of the parasitic array?

Last Answer : Their adjustment is critical and they do not operate over a wide frequency range.

hat two factors determine the directivity pattern of the parasitic array?

Description : hat two factors determine the directivity pattern of the parasitic array?

Last Answer : Length of the parasitic element (tuning) and spacing between the parasitic and driven elements.

Consider the following statements: 1. In a direct-to-home (DTH) system, the viewer dish antenna picks up signals from the satellite directly. 2. Cable operators receive signal from the satellite on large community dish antennas and then transmit to the viewers’ sets. Which of the above statements is/are correct? (a) Only 1 (b) Only 2 (c) Both 1 and 2 (d) Neither 1 nor 2

Description : Consider the following statements: 1. In a direct-to-home (DTH) system, the viewer dish antenna picks up signals from the satellite directly. 2. Cable operators receive signal from the satellite on large community dish antennas and ... ? (a) Only 1 (b) Only 2 (c) Both 1 and 2 (d) Neither 1 nor 2

Last Answer : Ans:(c)

The line of sight communication requires transmit and receive antenna to face each other. If the transmit...

Description : The line of sight communication requires transmit and receive antenna to face each other. If the transmit antenna is vertically polarized, for the best reception the receive antenna should be:  ... 45° with respect to the horizontal polarization (4) At 45° with respect to the vertical polarization

Last Answer : The line of sight communication requires transmit and receive antenna to face each other. If the transmit antenna is vertically polarized, for the best reception the receive antenna should be:  Horizontally polarized.

Pick up the correct statement from the following: (A) The theodolite in which telescope can be rotated in vertical plane is called a transmit (B) When the vertical circle is to the left of the telescope during observation, it is called to be in left face (C) When the vertical circle is to the right of the telescope during observation, it is called to be in right face (D) All the above

Description : Pick up the correct statement from the following:  (A) The theodolite in which telescope can be rotated in vertical plane is called a transmit  (B) When the vertical circle is to the left of ... the telescope during observation, it is called to be  in right face  (D) All the above 

Last Answer : (D) All the above 

Which of the following antennas receive signals in the horizontal plane equality well from all directions? A. Horizontal Hertz antenna B. Vertical loop antenna C. Vertical Yagi antenna D. A vertical antenna which is a quarter-wavelength long

Description : Which of the following antennas receive signals in the horizontal plane equality well from all directions? A. Horizontal Hertz antenna B. Vertical loop antenna C. Vertical Yagi antenna D. A vertical antenna which is a quarter-wavelength long

Last Answer : D. A vertical antenna which is a quarter-wavelength long

The Yagi antenna is an example of what type of array?

Description : The Yagi antenna is an example of what type of array?

Last Answer : Multielement parasitic array.

During which of the transmit or receive cycles are both the tr and atr tubes of a parallelconnected duplexer ionized (arcing)?

Description : During which of the transmit or receive cycles are both the tr and atr tubes of a parallelconnected duplexer ionized (arcing)?

Last Answer : Transmit.

What type of antenna radiates in and receives energy from all directions at once?

Description : What type of antenna radiates in and receives energy from all directions at once?

Last Answer : Omnidirectional.

What is the name given to the angle through which a transmitters rotor is mechanically rotated?

Description : What is the name given to the angle through which a transmitters rotor is mechanically rotated?

Last Answer : Signal.

Whichoneofthe followingterms doesnot applyto theYagi-Uda array? a. Good bandwidth b. Parasitic elements c. Folded dipole d.Highgain

Description : Whichoneofthe followingterms doesnot applyto theYagi-Uda array? a. Good bandwidth b. Parasitic elements c. Folded dipole d.Highgain

Last Answer : d.Highgain

The product of the radiated RF power of a transmitter and the gain of the antenna system in a given direction relative to an isotropic radiator is called ____. A. Effective Radiated Power (ERP) B. Effective Isotropic Radiated Power (EIRP) C. Radiated Power D. Transmit Power

Description : The product of the radiated RF power of a transmitter and the gain of the antenna system in a given direction relative to an isotropic radiator is called ____. A. Effective Radiated Power (ERP) B. Effective Isotropic Radiated Power (EIRP) C. Radiated Power D. Transmit Power

Last Answer : B. Effective Isotropic Radiated Power (EIRP)

Which gyro rotor in figure 3-6, view (A) view (B) view (C), will have the greatest rigidity if all are rotated at the same speed?

Description : Which gyro rotor in figure 3-6, view (A) view (B) view (C), will have the greatest rigidity if all are rotated at the same speed?

Last Answer : C.

What is the frequency of the output voltage of an alternator with four poles that is rotated at 3600 rpm?

Description : What is the frequency of the output voltage of an alternator with four poles that is rotated at 3600 rpm?

Last Answer : 120 Hz.

Communiction circuits that transmit data in both directions but not at the same time are operating in a. a simplex mode b. a half duplex mode c. a full duplex mode d. an asynchronous mode

Description : Communiction circuits that transmit data in both directions but not at the same time are operating in a. a simplex mode b. a half duplex mode c. a full duplex mode d. an asynchronous mode

Last Answer : a half duplex mode

A transmission mode that can transmit data in both the directions but transmits in only one direction at a time. a) simplex b) half duplex c) full duplex d) semi-duplex

Description : A transmission mode that can transmit data in both the directions but transmits in only one direction at a time. a) simplex b) half duplex c) full duplex d) semi-duplex

Last Answer : b) half duplex

Liquids transmit pressure equally in all the directions. This is according to (A) Boyle's law (B) Archimedes principle (C) Pascal's law (D) Newton's formula

Description : Liquids transmit pressure equally in all the directions. This is according to (A) Boyle's law (B) Archimedes principle (C) Pascal's law (D) Newton's formula

Last Answer : Answer: Option C

Highly specialised cells in animals which can detect, receive & transmit different kinds of stimuli

Description : Highly specialised cells in animals which can detect, receive & transmit different kinds of stimuli

Last Answer : Highly specialised cells in animals which can detect, receive & transmit different kinds of stimuli

Highly specialised cells in animals which can detect, receive & transmit different kinds of stimuli

Description : Highly specialised cells in animals which can detect, receive & transmit different kinds of stimuli

Last Answer : Highly specialised cells in animals which can detect, receive & transmit different kinds of stimuli

The transmit and receive elements of a sound-powered telephone handset are _____________. A. identical and can be used for either function B. of similar construction but different enough to be used only for its own function C. of very different construction and MUST be used only for its own function D. constructed so that each can fit only in its own recess

Description : The transmit and receive elements of a sound-powered telephone handset are _____________. A. identical and can be used for either function B. of similar construction but different enough to be used only for ... only for its own function D. constructed so that each can fit only in its own recess

Last Answer : Answer: A

The effect of adding parasitic elements of a Hertz dipole is to A. make the antenna more omnidirectional B. reduce its resonant frequency C. increase the antenna’s power gain D. All of these

Description : The effect of adding parasitic elements of a Hertz dipole is to A. make the antenna more omnidirectional B. reduce its resonant frequency C. increase the antenna’s power gain D. All of these

Last Answer : C. increase the antenna’s power gain

The parasitic element of an antenna system will A. decrease its directivity B. increase its directivity C. give the antenna unidirectional properties D. both B and C

Description : The parasitic element of an antenna system will A. decrease its directivity B. increase its directivity C. give the antenna unidirectional properties D. both B and C

Last Answer : D. both B and C

Which of the following improves antenna directivity? A. Driven element B. Reflector element C. Director element D. Parasitic element

Description : Which of the following improves antenna directivity? A. Driven element B. Reflector element C. Director element D. Parasitic element

Last Answer : D. Parasitic element

The number of parasitic elements in yagi antenna is

Last Answer : The number of parasitic elements in yagi antenna is 2.

Turning up the transmit power, or utilizing a high-gain antenna to reach wireless users from a distance, increases your exposure to ______________________.?

Description : Turning up the transmit power, or utilizing a high-gain antenna to reach wireless users from a distance, increases your exposure to ______________________.?

Last Answer : Turning up the transmitter power is a good way to insure that more cellphones, farther away, can hear the base station. But it doesn't to anything to help the base station hear the cellphones that ... narrower beam-width. So it works farther out, but only through a narrower 'window' of directions.

The product of antenna input power and the antenna power gain expressed in kW is called __. A. Effective Radiated Power (ERP) B. Effective Isotropic Radiated Power (EIRP) C. Radiated Power D. Transmit Power

Description : The product of antenna input power and the antenna power gain expressed in kW is called __. A. Effective Radiated Power (ERP) B. Effective Isotropic Radiated Power (EIRP) C. Radiated Power D. Transmit Power

Last Answer : A. Effective Radiated Power (ERP)

The operation of resection involves the following steps 1. Rough orientation of the plane table 2. The three lines form a triangle of error 3. Drawing lines back through the three control points 4. Select a point in the triangle of error such that each ray is equally rotated either clockwise or anti clockwise 5. The points obtained by three rays are the correct location. The correct sequence is (A) 1, 3, 2, 4, 5 (B) 1, 2, 3, 4, 5 (C) 1, 4, 3, 2, 5 (D) 1, 3, 2, 4, 5

Description : The operation of resection involves the following steps 1. Rough orientation of the plane table 2. The three lines form a triangle of error 3. Drawing lines back through the three control points 4. Select a point in the triangle of error ... 2, 3, 4, 5 (C) 1, 4, 3, 2, 5 (D) 1, 3, 2, 4, 5

Last Answer : (A) 1, 3, 2, 4, 5

An ungrounded antenna near the ground A. acts as a single antenna of twice the height B. is unlikely to need an earth mat C. acts as antenna array D. must be horizontally polarized

Description : An ungrounded antenna near the ground A. acts as a single antenna of twice the height B. is unlikely to need an earth mat C. acts as antenna array D. must be horizontally polarized

Last Answer : C. acts as antenna array

A theoretical reference antenna that provides a comparison for antenna measurements. A. Marconi antenna B. Isotropic radiator C. Yagi-Uda array D. Whip antenna

Description : A theoretical reference antenna that provides a comparison for antenna measurements. A. Marconi antenna B. Isotropic radiator C. Yagi-Uda array D. Whip antenna

Last Answer : B. Isotropic radiator

______ is an antenna array which is highly directional at right angles to the plane of the array? A. Broadside array B. End-fire array C. Turnstile array D. Log-periodic array

Description : ______ is an antenna array which is highly directional at right angles to the plane of the array? A. Broadside array B. End-fire array C. Turnstile array D. Log-periodic array

Last Answer : A. Broadside array

_____ is an antenna with a number of half-wave antenna on it. A. Antenna array B. Tower C. Omni-directional D. Rhombic

Description : _____ is an antenna with a number of half-wave antenna on it. A. Antenna array B. Tower C. Omni-directional D. Rhombic

Last Answer : A. Antenna array

Which is a non-resonant antenna? A. Rhombic antenna B. Folded dipole C. End-fire array D. Yagi-Uda antenna

Description : Which is a non-resonant antenna? A. Rhombic antenna B. Folded dipole C. End-fire array D. Yagi-Uda antenna

Last Answer : A. Rhombic antenna

If the current ratios of the two or more elements must be held 5% and the phase angle to 3° the antenna is called a A. end fire array B. critical phased array C. broadband array D. wideband array

Description : If the current ratios of the two or more elements must be held 5% and the phase angle to 3° the antenna is called a A. end fire array B. critical phased array C. broadband array D. wideband array

Last Answer : B. critical phased array

What circuit is responsible in activating and deactivating adjacent antenna elements in a mobile satellite array? A. Radial divider B. Divider/combiner C. Radial combiner D. Radial multiplexer

Description : What circuit is responsible in activating and deactivating adjacent antenna elements in a mobile satellite array? A. Radial divider B. Divider/combiner C. Radial combiner D. Radial multiplexer

Last Answer : A. Radial divider

In a typical mobile satellite array antenna if three elements are activated, how many elements are deactivated? A. 3 B. 11 C. 5 D. 9

Description : In a typical mobile satellite array antenna if three elements are activated, how many elements are deactivated? A. 3 B. 11 C. 5 D. 9

Last Answer : B. 11

Which is the non-resonant antenna? A. Broadside Antenna B. Folded Dipole C. Rhombic antenna D. End fire array

Description : Which is the non-resonant antenna? A. Broadside Antenna B. Folded Dipole C. Rhombic antenna D. End fire array

Last Answer : C. Rhombic antenna

A type of array antenna which consists of one half-wave driven dipole, one reflector and one director A. Hertzian dipole B. Yagi-uda C. Broadside collinear D. Log periodic dipole array

Description : A type of array antenna which consists of one half-wave driven dipole, one reflector and one director A. Hertzian dipole B. Yagi-uda C. Broadside collinear D. Log periodic dipole array

Last Answer : B. Yagi-uda

It consists of a number of dipoles of equal size, equally spaced along a straight line with all dipoles fed in the same phase from the same source. A. Log-periodic antenna B. Yagi antenna C. End-fire array D. Broadside array

Description : It consists of a number of dipoles of equal size, equally spaced along a straight line with all dipoles fed in the same phase from the same source. A. Log-periodic antenna B. Yagi antenna C. End-fire array D. Broadside array

Last Answer : D. Broadside array

One ofthe followingconsistsof nonresonant antennas: a.The rhombic antenna b. The folded dipole c. The end-fire array d. The broadside array

Description : One ofthe followingconsistsof nonresonant antennas: a.The rhombic antenna b. The folded dipole c. The end-fire array d. The broadside array

Last Answer : a.The rhombic antenna

Adaptive array antenna is superior to switched beam antenna because:

Description : Adaptive array antenna is superior to switched beam antenna because: (A) It optimizes the power radiated (B) It has simpler architecture (C) It has low bandwidth (D) It has low backlobe

Last Answer : Adaptive array antenna is superior to switched beam antenna because: It optimizes the power radiated

What is the optimum length for a half-wave aerial that requires to transmit and receive 1 MHz signals?

Description : What is the optimum length for a half-wave aerial that requires to transmit and receive 1 MHz signals?

Last Answer : An aerial length of 750 metres is required

The first satellite to receive and transmit simultaneously A. Intelsat I B. Agila I C. Syncorn I D. Telstar I

Description : The first satellite to receive and transmit simultaneously A. Intelsat I B. Agila I C. Syncorn I D. Telstar I

Last Answer : D. Telstar I

Known to be the first satellite capable to receive and transmit simultaneously. A. Score B. Syncom I C. Telstar 1 D. Echo1

Description : Known to be the first satellite capable to receive and transmit simultaneously. A. Score B. Syncom I C. Telstar 1 D. Echo1

Last Answer : C. Telstar 1

What is the primary advantage of DSBSC in AM? A. Reduce bandwidth over standard AM B. All of these C. It is simpler to transmit and receive than the standard AM D. No transmitter power is wasted in the carrier

Description : What is the primary advantage of DSBSC in AM? A. Reduce bandwidth over standard AM B. All of these C. It is simpler to transmit and receive than the standard AM D. No transmitter power is wasted in the carrier

Last Answer : D. No transmitter power is wasted in the carrier

Communication satellite are used to a) Transmit communication signal only b)Receive Communication signal only c)Receive and redirect communication signal d)Provides information of natural resources only

Description : Communication satellite are used to a) Transmit communication signal only b)Receive Communication signal only c)Receive and redirect communication signal d)Provides information of natural resources only

Last Answer : c)Receive and redirect communication signal