What is the primary purpose of a directional coupler?

What is the primary purpose of a directional coupler?
by

1 Answer

Answer :

Sampling energy within a waveguide.
by

Related questions

What is the purpose of the absorbent material in a directional coupler?

Description : What is the purpose of the absorbent material in a directional coupler?

Last Answer : Absorb the energy not directed at the pick-up probe and a portion of the overall energy

What happens to reflected energy that enters a directional coupler that is designed to sample incident energy?

Description : What happens to reflected energy that enters a directional coupler that is designed to sample incident energy?

Last Answer : . The reflected energy adds at the absorbent material and is absorbed.

in a directional coupler that is designed to sample the incident energy, what happens to the two portions of the wavefront when they arrive at the pickup probe?

Description : in a directional coupler that is designed to sample the incident energy, what happens to the two portions of the wavefront when they arrive at the pickup probe?

Last Answer : The wavefront portions add.

How far apart are the two holes in a simple directional coupler?

Description : How far apart are the two holes in a simple directional coupler?

Last Answer : 1/4 wavelength.

Describe a directional coupler.

Description : Describe a directional coupler.

Last Answer : A fiber optic coupler that prevents the transfer of power between input fibers.

A component that samples the microwave signal travelling in one direction down to the transmission line A. Isolator B. Combiner C. Directional coupler D. Attenuator

Description : A component that samples the microwave signal travelling in one direction down to the transmission line A. Isolator B. Combiner C. Directional coupler D. Attenuator

Last Answer : C. Directional coupler

Best choice of transmission line component to couple a coaxial line to a parallel-wire line A. Shorting B. Balun C. Slotted line D. Directional coupler

Description : Best choice of transmission line component to couple a coaxial line to a parallel-wire line A. Shorting B. Balun C. Slotted line D. Directional coupler

Last Answer : B. Balun

To couple a coaxial line to parallel line, it is better to use a ______. A. Slotted line B. Quarter-wave transformer C. Directional Coupler D. Balun

Description : To couple a coaxial line to parallel line, it is better to use a ______. A. Slotted line B. Quarter-wave transformer C. Directional Coupler D. Balun

Last Answer : D. Balun

To connect coaxial line to a parallel-wire _________ is the best to use. A. directional coupler B. quarter-wave transformer C. balun D. slotted line

Description : To connect coaxial line to a parallel-wire _________ is the best to use. A. directional coupler B. quarter-wave transformer C. balun D. slotted line

Last Answer : C. balun

Curl cannot be employed in which one of the following? a) Directional coupler b) Magic Tee c) Isolator and Terminator d) Waveguides

Description : Curl cannot be employed in which one of the following? a) Directional coupler b) Magic Tee c) Isolator and Terminator d) Waveguides

Last Answer : d) Waveguides

To couple a coaxialline toa parallel-wire line,itisbesttouse a a. slotted line b.balun c. directional coupler d. quarter-wave transformer

Description : To couple a coaxialline toa parallel-wire line,itisbesttouse a a. slotted line b.balun c. directional coupler d. quarter-wave transformer

Last Answer : b.balun

Fortransmission-line loadmatchingover a range offrequencies,itisbesttouse a a. balun b. broadband directional coupler c. double stub d. single stub of adjustable position

Description : Fortransmission-line loadmatchingover a range offrequencies,itisbesttouse a a. balun b. broadband directional coupler c. double stub d. single stub of adjustable position

Last Answer : c. double stub

Describe the working of directional coupler with neat diagram.

Description : Describe the working of directional coupler with neat diagram. 

Last Answer : Directional couplers are devices that will pass signal across one path while passing a much smaller signal along another path.  One of the most common uses of the directional coupler is to ... . The frequency determines the separation of the two holes as a fraction of the wavelength.  

In a directional coupler:

Description : In a directional coupler:  (1) Isolation (dB) equals coupling plus directivity (2) Coupling (dB) equals isolation plus directivity (3) Directivity (dB) equals isolation plus coupling (4) Isolation (dB) equals (coupling) (directivity)

Last Answer : In a directional coupler: Isolation (dB) equals coupling plus directivity.

What is the purpose of an antenna coupler

Description : What is the purpose of an antenna coupler

Last Answer : It matches the impedance of an antenna to that of a transmission line at any desired frequency.

Horn radiators serve what purpose other than being directional radiators?

Description : Horn radiators serve what purpose other than being directional radiators?

Last Answer : Waveguide impedance matching devices.

Which type of optical splitter (Y-coupler or T-coupler) splits only a small amount of power from the input fiber to one of the output fibers?

Description : Which type of optical splitter (Y-coupler or T-coupler) splits only a small amount of power from the input fiber to one of the output fibers?

Last Answer : T-coupler

Which fiber optic component (splice, connector, or coupler) makes a permanent connection in a distributed system?

Description : Which fiber optic component (splice, connector, or coupler) makes a permanent connection in a distributed system?

Last Answer : Splice.

Why is the coupler pressurized with nitrogen?

Description : Why is the coupler pressurized with nitrogen?

Last Answer : To aid in heat transfer and prevent corona and arcing

What are the tuning modes for the coupler group discussed?

Description : What are the tuning modes for the coupler group discussed?

Last Answer : Automatic, semiautomatic, and manual.

To measure incident power, you must rotate the coupler detector of the wattmeter so that the arrow indicating power flow points toward which end of the transmission line?

Description : To measure incident power, you must rotate the coupler detector of the wattmeter so that the arrow indicating power flow points toward which end of the transmission line?

Last Answer : Load.

How are the input and output directional couplers in a twt connected to the helix?

Description : How are the input and output directional couplers in a twt connected to the helix?

Last Answer : The directional couplers are not physically connected to the helix.

The purpose of stacking elements on an antenna. A. Sharper directional pattern B. increased gain C. Improved bandpass D. All of these

Description : The purpose of stacking elements on an antenna. A. Sharper directional pattern B. increased gain C. Improved bandpass D. All of these

Last Answer : D. All of these

Purpose of Directional inverse Over current & earth fault relay; type- CDD

Description : Purpose of Directional inverse Over current & earth fault relay; type- CDD

Last Answer : Directional phase or earth fault protection of ring-mains, parallel transformers, transformer feeders, parallel feeders etc., employing the time graded principle.; This relay comprises an inductive ... induction disc unit. The directional unit is normally provided with voltage polarising coils. 

What is the primary purpose of a dummy load?

Description : What is the primary purpose of a dummy load?

Last Answer : Absorb all energy without producing standing waves.

What is the primary purpose of a synchro system?

Description : What is the primary purpose of a synchro system?

Last Answer : Precise and rapid transmission of data between equipment and stations.

What is the primary purpose of a keyboard?

Description : What is the primary purpose of a keyboard?

Last Answer : To enter or input alphanumeric character codes.

What is a coupler signal ?

Description : What is a coupler signal ?

Last Answer : coupler signal K.

Which one is an antenna coupling unit? A. Coupler B. Diplexer C. Lecher wire D. Duplexer

Description : Which one is an antenna coupling unit? A. Coupler B. Diplexer C. Lecher wire D. Duplexer

Last Answer : B. Diplexer

Not a reason for the use of an antenna coupler. A. To make the antenna look resistive B. To provide the output amplifier with the correct load impedance C. To discriminate against harmonics D. To prevent re-radiation of the local oscillator

Description : Not a reason for the use of an antenna coupler. A. To make the antenna look resistive B. To provide the output amplifier with the correct load impedance C. To discriminate against harmonics D. To prevent re-radiation of the local oscillator

Last Answer : D. To prevent re-radiation of the local oscillator

Referred to as a ferrite device that can be used in lieu of a duplexer to isolate a microwave transmitter and receiver when both are connected to the same antenna. A. Isolator B. Circulator C. Coupler D. Diode.

Description : Referred to as a ferrite device that can be used in lieu of a duplexer to isolate a microwave transmitter and receiver when both are connected to the same antenna. A. Isolator B. Circulator C. Coupler D. Diode.

Last Answer : B. Circulator

A device that connects two dissimilar networks and performs the protocol conversion. A. Gateway B. Coupler C. Transformer D. Converter

Description : A device that connects two dissimilar networks and performs the protocol conversion. A. Gateway B. Coupler C. Transformer D. Converter

Last Answer : A. Gateway

What is an opto-coupler IC?

Description : What is an opto-coupler IC?

Last Answer : Opto-coupler IC is a combined package of a photo-emitting device and a photosensing device.Examples for opto-coupler circuit : LED and a photo diode, LED and photo transistor, LED and Darlington. Examples for opto-coupler IC : MCT 2F , MCT 2E .

When a coupler nut is subjected to crushing stress, crushing failure can be avoided if _____ a. crushing stress induced is more than permissible crushing stress in the nut b. permissible crushing stress is more than crushing stress induced in the threads c. crushing stress induced is equal to permissible crushing stress d. all of the above

Description : When a coupler nut is subjected to crushing stress, crushing failure can be avoided if _____ a. crushing stress induced is more than permissible crushing stress in the nut b. permissible crushing ... threads c. crushing stress induced is equal to permissible crushing stress d. all of the above

Last Answer : b. permissible crushing stress is more than crushing stress induced in the threads

Bus coupler is very essential in arrangement (a) single bus (b) double bus, double breaker (c) main and transfer bus (d) all of the above

Description : Bus coupler is very essential in arrangement (a) single bus (b) double bus, double breaker (c) main and transfer bus (d) all of the above

Last Answer : (c) main and transfer bus

When connector losses, splice losses and coupler losses are added, what is the limiting factor? ∙ A. source power ∙ B. fiber attenuation ∙ C. connector and splice loss ∙ D. detector sensitivity

Description : When connector losses, splice losses and coupler losses are added, what is the limiting factor? ∙ A. source power ∙ B. fiber attenuation ∙ C. connector and splice loss ∙ D. detector sensitivity

Last Answer : D. detector sensitivity

A coupler which consists of a series of lenses and a partly reflective surface ∙ a. Beam-splitting coupler ∙ b. Reflective star coupler ∙ c. Fused coupler ∙ d. None of these

Description : A coupler which consists of a series of lenses and a partly reflective surface ∙ a. Beam-splitting coupler ∙ b. Reflective star coupler ∙ c. Fused coupler ∙ d. None of these

Last Answer : ∙ a. Beam-splitting coupler

In SONET, OC-1 stands for: a. Optical Carrier level one b. Optical Coupler unidirectional c. Optical Channel one d. Optical Cable type 1

Description : In SONET, OC-1 stands for: a. Optical Carrier level one b. Optical Coupler unidirectional c. Optical Channel one d. Optical Cable type 1

Last Answer : a. Optical Carrier level one

One ofthe followingis not a reason forthe use of anantenna coupler: a. To make the antenna look resistive b. To provide the output amplifier with the correct load impedance c. To discriminate against harmonics d. To prevent reradiation of the local oscillator

Description : One ofthe followingis not a reason forthe use of anantenna coupler: a. To make the antenna look resistive b. To provide the output amplifier with the correct load impedance c. To discriminate against harmonics d. To prevent reradiation of the local oscillator

Last Answer : d. To prevent reradiation of the local oscillator

What maximum load would you place on a right angle coupler?

Description : What maximum load would you place on a right angle coupler?

Last Answer : 630kg (or 630kgf or 6.25kN)

What is the height of the base lift (kicker lift) on a typical tube and coupler scaffold? a. 225mm (9 inches) b. 300mm (12 inches) c. 150mm (6 inches) d. 100mm (4 inches)

Description : What is the height of the base lift (kicker lift) on a typical tube and coupler scaffold? a. 225mm (9 inches) b. 300mm (12 inches) c. 150mm (6 inches) d. 100mm (4 inches)

Last Answer : c. 150mm (6 inches

P-N junction is (A) a rectifier. (B) an amplifier. (C) an Oscillator. (D) a Coupler.

Description : P-N junction is (A) a rectifier. (B) an amplifier. (C) an Oscillator. (D) a Coupler.

Last Answer : (A) a rectifier.

Draw a neat sketch of ‘Locomotive coupler’ mechanism. Explain its working in brief.

Description : Draw a neat sketch of ‘Locomotive coupler’ mechanism. Explain its working in brief.

Last Answer : Figure: Coupler Rod of Locomotive  (Link AD = Link BC = Crank Link CD = Coupling Rod Link AB = Fixed Link = Frame) Working of Coupler Rod of Locomotive: It is an ... center distance between them. This mechanism is meant for transmitting rotary motion from one wheel to the other wheel.

Explain triggering of SCR using opto-coupler. State its advantages.

Description : Explain triggering of SCR using opto-coupler. State its advantages. 

Last Answer : Triggering of SCR using opto-coupler:  A simple opto-coupler based triggering circuit for SCR is shown in the figure. An optocoupler or opto-isolator is a combination of light source ... is small size and light weight device. iii)Interfacing with logic circuits is easily possible.

Why is a shaft coupler used between turbine and generator ?

Description : Why is a shaft coupler used between turbine and generator ?

Last Answer : For easy transmission torque or rotation angle and can also use for the protection of the safety devices shaft cannot be separated from the shaft during motion coupling will be damaged first so as avoid to the damaged of motor or other transmission parts.

Write working of opto coupler as an isolator.

Description : Write working of opto coupler as an isolator.

Last Answer : Optocoupler is as shown in fig. it consist of LED as an light source and phototransistor act as light detector.  When input pulse is applied LED turns ON.Light emitted by LED focused on CB ... starts flowing.As input pulse reduces to zero LED turns OFF collector current becomes zero. 

In laminated object manufacturing (LOM), which of the following cutting strategy ispreferable? a.Directional scanning b.Zigzag tool paths c.Contouring and spiral paths d.Boundary cutting tool paths

Description : In laminated object manufacturing (LOM), which of the following cutting strategy ispreferable? a.Directional scanning b.Zigzag tool paths c.Contouring and spiral paths d.Boundary cutting tool paths

Last Answer : d.Boundary cutting tool paths

The earth's gravitational force field is said to be conservative force field because a.The work acted by the earth's gravitational field on a particle is independent on the path traced out by the particle b.The work acted by the erth's gravitational field will cause same path for all particles irrespective of their mass c.The direction of gravitational force is fixed d.The gravitational field has only single directional component always acting normal to a body e.The value of gravitational force rise is fixed

Description : The earth's gravitational force field is said to be conservative force field because a.The work acted by the earth's gravitational field on a particle is independent on the path traced out by ... directional component always acting normal to a body e.The value of gravitational force rise is fixed

Last Answer : a. The work acted by the earth's gravitational field on a particle is independent on the path traced out by the particle

To make the number pad act as a directional arrow, we press -Other

Description : To make the number pad act as a directional arrow, we press -Other

Last Answer : We have to press Num Lock Key

The electric field applied in vertical directional to the cathode rays moving horizontally deflect them in __________

Description : The electric field applied in vertical directional to the cathode rays moving horizontally deflect them in __________

Last Answer : The electric field applied in vertical directional to the cathode rays moving horizontally deflect them in __________ ... a) and (b) D. None of these