menu search
person
Draw radiation pattern for following antenna i) Yagi-Uda antenna ii) Loop antenna iii) Dish antenna iv) Horn antenna
thumb_up_alt 0 like thumb_down_alt 0 dislike
6 views

1 Answer

Type of antenna
Radiation Patteren 
Yagi-Uda antenna
image
Loop antenna
image
Dish antenna
image
Horn antenna 
image
thumb_up_alt 0 like thumb_down_alt 0 dislike
← Prev Question Next Question →

Related questions

Description :

Write one application of following antenna i. Rectangular antenna ii. Dish antenna iii. Yagi-Uda antenna iv. Horn antenna 

Answer :

i. Rectangular antenna is used in direction finding in portable recievers. ii. Dish antenna is used to transmit and receive signal from satellite. iii. Yagi-Uda antenna is used in HF and VHF range as a TV receiving antenna. iv. Horn antenna is used in satellite tracking.

thumb_up_alt 0 like thumb_down_alt 0 dislike
5 views 1 answer
Description :

Write the application of the following antennas: 1) Rectangular antenna 2) Dish antenna 3) Horn antenna 4) Loop antenna 5) Yagi-Uda antenna. 

Answer :

Applications:  1.Rectangular antenna  i)Used in Mobile and satellite communication ii)Used in Global Positioning System iii) Used for Radio Frequency Identification (RFID) iv) Radar  Dish ... antenna. 2. Yagi-Uda antenna is used in conditional Access System (CAS) at the decryptor.

thumb_up_alt 0 like thumb_down_alt 0 dislike
88 views 1 answer
Description :

Describe with respect to antenna (i) radiation pattern (ii) directive gain (iii) power gam (iv) polarization

Answer :

(i) Radiation pattern:-A graph or diagram which tells us about the manner in which an antenna radiates more power in different directions is known as the radiation patteren of antenna.  ( ... as the direction of the electric vector in the electromagnetic wave radiated by the transmitting antenna. 

thumb_up_alt 0 like thumb_down_alt 0 dislike
6 views 1 answer
Description :

Draw the radiation pattern for Dipole antenna: (i) Half wave dipole (ii) Folded dipole.

Answer :

The radiation pattern for Half wave dipole antenna The radiation pattern for Folded dipole antenna.

thumb_up_alt 0 like thumb_down_alt 0 dislike
5 views 1 answer
Description :

Draw the structure and state applications of: i) Ferrite loop (rod) antenna ii) Horn antenna

Answer :

Horn antenna: Application:- i) Used at microwave frequency. ii) Used in satellite tracking.  Ferrite loop antenna: Application:- In Am radio receiver to receive MW and SW band signals. In FM radio receiver

thumb_up_alt 0 like thumb_down_alt 0 dislike
3 views 1 answer
Description :

Draw the structure of horn antenna and its radiation pattern. List its any two applications.

Answer :

The structure of horn antenna Radiation pattern of Horn Antenna Application:- i) Used at microwave frequency. ii) Used in satellite tracking 

thumb_up_alt 0 like thumb_down_alt 0 dislike
12 views 1 answer
Description :

Explain loop antenna with neat sketch. Draw radiation pattern. State its advantages and applications.

Answer :

Loop antenna:-The single turn coil carrying RF current through it having length less than the wavelength.   Advantages:- 1. highly directive 2. Small size Applications:- 1. For direction finding 2. In portable receivers 3. In navigation 

thumb_up_alt 0 like thumb_down_alt 0 dislike
5 views 1 answer
Description :

Draw construction of Yagi-Uda antenna and explain.

Answer :

Explanation A Yagi-Uda antenna, commonly known as a Yagi antenna, is a directional antenna consisting of multiple parallel elements in a line, usually half-wave dipoles made of ... receiver with a transmission line and additional parasitic elements called reflector and one or more directors.

thumb_up_alt 0 like thumb_down_alt 0 dislike
13 views 1 answer
Description :

Sketch the radiation pattern of Yagi-Uda antenna.

Answer :

Sketch the radiation pattern of Yagi-Uda antenna.

thumb_up_alt 0 like thumb_down_alt 0 dislike
14 views 1 answer
Description :

Sketch of Yagi-Uda antenna with its radiation pattern. Explain each element of YagiUda antenna

Answer :

Radiation Pattern:- Explanation- A Yagi-Uda antenna, commonly known as a Yagi antenna, is a directional antenna consisting of multiple parallel elements in a line, usually halfwave dipoles ... one or two directors and reflectors give high gain and beam width per unit area of array.

thumb_up_alt 0 like thumb_down_alt 0 dislike
75 views 1 answer
Description :

Define the following terms related to antennas; (i) Antenna resistance (ii) Directivity (iii) Antenna gain (iv) Power density

Answer :

Antenna Resistance - The resistance of an antenna has two components: 1. Its radiation resistance due to conversion of power into electromagnetic waves 2. The resistance due to actual losses in the ... the transmitter power divided by the surface area of a sphere (4πR2) at that distance.

thumb_up_alt 0 like thumb_down_alt 0 dislike
5 views 1 answer
Description :

Define the following terms: (i) Polarization (ii) Antenna gain (iii)Antenna resistance (iv)Directivity

Answer :

i) Polarization:- It is defined as the direction of electric field vector in the EM wave radiated by the transmitting antenna. ii) Antenna Gain:- Antenna gain is defined as the ratio of ... in only one direction in which the radiation is maximum. That is directivity = Max. directive gain

thumb_up_alt 0 like thumb_down_alt 0 dislike
3 views 1 answer
Description :

Draw Yagiuda antenna with its radiation pattern.

Answer :

Construction of Yagi-Uda Antenna Radiation Pattern of Yagi-Uda Antenna

thumb_up_alt 0 like thumb_down_alt 0 dislike
3 views 1 answer
Description :

a) For a transmission line, Find SWR and reflection coefficient R if, i. There is no reflected voltage. ii. Reflected voltage and incident voltage is equal. iii. If reflected voltage=20V and incident voltage=10V. iv. If reflected voltage=10V and incident voltage =20V.

Answer :

reflection coefficient R=Vr/Vi i. There is no reflected voltage. i.e,Vr=0 R=0 SWR= 1+R/1-R=1 ii. Reflected voltage and incident voltage is equal. Vr=Vi; R=1 SWR= 1+R/1-R=1+1/1-1=infinity iii. If reflected ... and incident voltage =20V. Vr=10 and Vi=20 R=10/20=0.5 SWR= 1+R/1-R=1+.5/1-.5=3 

thumb_up_alt 0 like thumb_down_alt 0 dislike
3 views 1 answer
Description :

State Magneto-striction. Draw Hysteresis loop for : (i) High silicon steel (ii) Copper (iii) Soft iron (iv) Wood

Answer :

Magneto-striction: It is the change in dimensions of ferro magnetic material when it is magnetized for eg. Silicon steel, iron or any ferromagnetic material.  i) Hysteresis loop for High silicon steel :  ... loop for Soft iron :  iv) Hysteresis loop for Copper and Wood : 

thumb_up_alt 0 like thumb_down_alt 0 dislike
133 views 1 answer
Description :

In a FM system, the maximum deviation is 75KHz. Find bandwidth for modulating frequency i. fm=500Hz ii. fm=5KHz iii. fm=10KHz Draw conclusion for bandwidth of FM from answer.

Answer :

Given deviation∆=75kHz i) fm=500Hz bandwidth B.W=2(∆+fm)  =2(75k+500)=151kHz  ii). fm=5KHz bandwidth B.W=2(∆+fm)  =2(75k+5k)=160KHz iii) fm=10KHz bandwidth B.W=2(∆+fm)  =2(75k+10k)=170KHz As the modulating frequency increases bandwidth also increases.

thumb_up_alt 0 like thumb_down_alt 0 dislike
3 views 1 answer
Description :

Compare PAM, PWM, and PPM on the basis of i. Variable characteristics ii. Bandwidth iii. Information contained in iv. Transmitted power

Answer :

Compare PAM, PWM, and PPM on the basis of i. Variable characteristics ii. Bandwidth iii. Information contained in iv. Transmitted power

thumb_up_alt 0 like thumb_down_alt 0 dislike
1 view 1 answer
Description :

Differentiate between AM and FM on the basis of: (i) Definition (ii) Bandwidth (iii) Modulation Index (iv) Application

Answer :

Compare AM and FM on the basis of i)Definition ii)Bandwidth iii) Wave propogation iv)Number of sidebands

thumb_up_alt 0 like thumb_down_alt 0 dislike
11 views 2 answers
Description :

Dish antenna is parabolic in shape and has meshy structure. Give reasons.

Answer :

A Practical reflector employing the properties of the parabola will be a three dimensional bowl-shaped surface, obtained by revolving the parabola about the axis AB. The resulting geometric ... (directrix) is constant. These geometric properties yield an excellent microwave or light reflector. 

thumb_up_alt 0 like thumb_down_alt 0 dislike
6 views 1 answer
Description :

A telephone cable has following primary constants per loop kilometer ,R=30Ω, L=20mH,C=0.06µF,G=0.If the applied signal has an angular frequency of 5000 rad/sec.., Determine (i) Characteristics impedence (ii) Attenuation constant

Answer :

A telephone cable has following primary constants per loop kilometer ,R=30Ω, L=20mH,C=0.06µF,G=0.If the applied signal has an angular frequency of 5000 rad/sec.., Determine (i) Characteristics impedence (ii) Attenuation constant

thumb_up_alt 0 like thumb_down_alt 0 dislike
9 views 1 answer
Description :

Describe operating principle of dish antenna. Draw its constructional details and radiation

Answer :

Operating principle: Dish antenna uses simple reflection principle, just as a mirror can reflect light and a curved mirror can reflect and focus light at a single point, the dish reflects and focuses the radio waves. ... as well as receive only. Dish antenna  Radiation Pattern: 

thumb_up_alt 0 like thumb_down_alt 0 dislike
40 views 1 answer
Description :

Consider the following statements and select the correct answer from the code given below: i. Rajasthan receives the highest solar radiation in the country. ii. India has the fifth largest installed wind power in the world. iii. The maximum amount of wind power is contributed by Tamil Nadu. iv. The primary source of uranium in India is Jaduguda. Codes: (A) i and ii (B) i, ii and iii (C) ii and iii (D) i and iv

Answer :

Answer: D

thumb_up_alt 0 like thumb_down_alt 0 dislike
13 views 1 answer
Description :

(i) Bilateral Network (ii) Node (iii) Loop (iv) Branch

Answer :

(i) Bilateral Network: If the characteristic of network (response or behavior) is independent of the direction of current through its elements in it, then the network is called as a bilateral network e. ... A part of an electric network which lies between two junctions or nodes is known as branch. 

thumb_up_alt 0 like thumb_down_alt 0 dislike
41 views 1 answer
Description :

Define the terms : i) Node ii) Branch iii) Loop iv) Mesh

Answer :

i) Node:  A point or junction where two or more elements of the network are connected together is called as node.  ii) Branch: A part of an electric network which lies between two junctions ... path (same as loop) in an electric circuit. OR A loop that does not contain any other loop inside

thumb_up_alt 0 like thumb_down_alt 0 dislike
69 views 1 answer
Description :

Explain half dipole antenna ( Resonant antenna ) with its radiation patteren. 

Answer :

Half wave dipole antenna Explanation:  1. It is a resonant antenna 2. It is exact half wavelength (λ /2) long & open circuited at one end. 3. The dipole antennas have ... pattern is bidirectional.  The radiation pattern of half wave dipole antenna is - The radiation pattern

thumb_up_alt 0 like thumb_down_alt 0 dislike
2 views 1 answer
Description :

An antenna has a radiation resistance of 72 Ω a loss resistance of 8 Ω and a power gain of 16. Find efficiency and directivity.

Answer :

An antenna has a radiation resistance of 72 Ω a loss resistance of 8 Ω and a power gain of 16. Find efficiency and directivity.

thumb_up_alt 0 like thumb_down_alt 0 dislike
4 views 1 answer
Description :

State significance of earthing. Draw and explain pipe earthing. State the values of earth resistances for : (i) Substation (ii) Residential wiring (iii) H.T. Line (iv) L.T. Line

Answer :

Significance of earthing:  * Earthing means connecting the body of the electrical equipment (it means the part which does not carries current under normal condition) to the earth. For example electrical equipment' ... surrounded by charcoal and salt.  the values of earth resistances for: 

thumb_up_alt 0 like thumb_down_alt 0 dislike
131 views 1 answer
Description :

Draw graphical symbols as per IS 962 – 1989. (i) Brickwork (ii) Partition Block (iii) Wood (iv) Single shutter door

Answer :

Graphical Symbols as per IS 962 – 1989, for-

thumb_up_alt 0 like thumb_down_alt 0 dislike
23 views 1 answer
Description :

Beam-penetration and shadow-mask are the two basic techniques for producing color displays with a CRT. Which of the following is not true ? I. The beam-penetration is used with random scan monitors. II. Shadow-mask is used in raster scan systems. III. Beam-penetration method is better than shadow-mask method. IV. Shadow-mask method is better than beam-penetration method. (A) I and II (B) II and III (C) III only (D) IV only

Answer :

(C) III only

thumb_up_alt 0 like thumb_down_alt 0 dislike
23 views 1 answer
Description :

Consider the following justifications for commonly using the two-level CPU scheduling : I. It is used when memory is too small to hold all the ready processes. II. Because its performance is same as that of the FIFO. III. Because it facilitates putting some set of processes into memory and a choice is made from that. IV. Because it does not allow to ... set of in-core processes. Which of the following is true ? (A) I, III and IV (B) I and II (C) III and IV (D) I and III

Answer :

(D) I and III

thumb_up_alt 0 like thumb_down_alt 0 dislike
9 views 1 answer
Description :

Write Unix command for following: i)create a folder OSY ii) create a file FIRST in OSY folder iii) List/display all files and directories. iv) Write command to clear the screen

Answer :

i) create a folder OSY: $mkdir OSY ii)create a file FIRST in OSY folder: $cd OSY $cat>FIRST or $ touch FIRST iii) List/display all files and directories: $ls iv) to clear screen: $clear

thumb_up_alt 0 like thumb_down_alt 0 dislike
6 views 1 answer
Description :

Suggest the type of lubricant used for the following jobs: i) Clock ii) I.C. Engines iii) Gears iv) Sewing machine

Answer :

i) Clock : Vegetable and animal oils like palm oil, hazel nut oil, neat foot oil, etc ii) I.C. Engines: Mineral oils containing additives are used. iii) Gears: Thick mineral oils containing ... Mineral oil, silicones, thin vegetable and animal oils like palm oil, hazel nut oil, neat foot oil.

thumb_up_alt 0 like thumb_down_alt 0 dislike
22 views 1 answer
Description :

Write down the method used for following product : (i) credit card (ii) carrying case (iii) hollow cylinder (iv) knobs

Answer :

i) Credit Card :- Plastic compounding and molding, Printing, Lamination, Cutting and Embossing. ii) Carrying case:- injection moulding iii) Hollow cylinder:- extrusion iv) Knobs:- compression moulding

thumb_up_alt 0 like thumb_down_alt 0 dislike
25 views 1 answer
Description :

Suggest one type of materials for water proofing for the following situations. i. Rising dampness in building ii. Leakages in dam iii. Concrete continuously in wet or damp condition iv. Leakages in lavatory ,bathroom and kitchen floor v. Cracks on plastered surface vi. Cracks on roof surface

Answer :

i. Flexible materials like butyl rubber, hot bitumen (asphalt), plastic sheets, bituminous felts, sheets of lead. ii. Liquid applied cementitious membranes iii. Liquid applied cementitious membranes ... v. Liquid applied cementitious membranes. vi. Brick bat coba, liquid applied bituminous membrane.

thumb_up_alt 0 like thumb_down_alt 0 dislike
22 views 1 answer
Description :

Suggest the degree of workability in terms of slump for the following: i) Pavements using pavers ii) Canal lining iii) Heavily reinforced sections iv) In-situ piling

Answer :

Degree of workability in terms of slump for the following: i) Pavements using pavers: 25-75 mm ii) Canal lining: 70-80 mm iii) Heavily reinforced sections: 50-100 mm iv) In-situ piling: 100-150 mm

thumb_up_alt 0 like thumb_down_alt 0 dislike
26 views 1 answer
Description :

Suggest the minimum grade of concrete for following exposure condition. i) RCC work ii) Water retaining structure iii) Sea water construction iv) Pre-stressed concrete

Answer :

Minimum grade of concrete for following exposure condition: i) RCC work = M 20 ii) Water retaining structure = M 25 iii) Sea water construction = M 20 for PCC and M 30 for RCC iv) Pre-stressed concrete = M 30

thumb_up_alt 0 like thumb_down_alt 0 dislike
55 views 1 answer
Description :

Identify the sensors for the following : i) Wind speed ii) RPM of generator shaft iii) Temperature in generator iv) Cable untwisting v) Vibration vi) Wind direction

Answer :

i) Wind Speed : Anemometer. ii) RPM of Generator Shaft: Accelerometers. iii) Temperature in Generator: Thermistor, thermocouple, RTD. iv) Cable Untwisting : Cable Twisting sensor. v) Vibration : Accelerometer, piezoelectric. vi) Wind direction: Wind vane.

thumb_up_alt 0 like thumb_down_alt 0 dislike
24 views 1 answer
Description :

Select insulating materials for following parts : (i) Insulation between heating element and base plate of electric iron. (ii) Insulation used over copper or aluminium conductor used for making coils. (iii) Transformer bushings. (iv) Insulation between transmission line and pole.

Answer :

Parts Insulating Materials  Insulation between heating element and base plate of electric iron. Mica Insulation used over copper or aluminium conductor used for making coils.  ... Transformer bushings Porcelain  Insulation between transmission line and pole. Porcelain

thumb_up_alt 0 like thumb_down_alt 0 dislike
78 views 1 answer
Description :

Identify type of BJT configuration having following features : (i) BJT configuration having the least current gain. (ii) KIT configuration called as voltage follower. (iii) BJT configuration having current gain less than one. (iv) BJT configuration suitable for impedance matching. (v) BIT configuration suitable for voltage amplification. (vi) BJT configuration having the least output impedance.  

Answer :

(i) BJT configuration having the least current gain : Common Base Configuration  (ii) KIT configuration called as voltage follower: Common Collector Configuration  (iii) BJT ... Emitter Configuration  (vi) BJT configuration having the least output impedance: Common Collector Configuration

thumb_up_alt 0 like thumb_down_alt 0 dislike
2.7k views 1 answer
Description :

State any two applications of each for the following types of electrical heating : (i) Direct resistance heating(ii) Indirect induction heating (iii) Direct.arc heating (iv) Dielectric heating

Answer :

(i) Direct resistance heating:- 1. This type of heating used for industrial purpose 2. Salt bath heating: This utilized for the purpose of carbonizing, tempering, quenching and hardening of steel tools 3. ... purpose. 14)In foundry for heating of sand, core, which are used in molding processes.

thumb_up_alt 0 like thumb_down_alt 0 dislike
152 views 1 answer
Description :

Name the type of rectifier for each of following feature : (i) Highest rectifier efficiency (ii) Highest form factor (iii) Two diode rectifier circuit (iv) PIV = 2Vm.

Answer :

(i) Highest rectifier efficiency : Center tapped & Bridge full wave Rectifier  (ii) Highest form factor : Center tapped & Bridge full wave Rectifier  (iii) Two diode rectifier circuit : Center tapped full wave Rectifier  (iv) PIV = 2Vm : Center tapped full wave Rectifier

thumb_up_alt 0 like thumb_down_alt 0 dislike
71 views 1 answer
Description :

Explain the following characteristics of AM radio receiver: (i) Sensitivity (ii) Selectivity.

Answer :

Sensitivity:- The ability to amplify the weak signals is called sensitivity. It is the function of overall receiver gain. Sensitivity of radio receiver is decided by the gain of the RF IF ... perfectly the receiver is able to select the desired carrier frequency and reject other frequencies. 

thumb_up_alt 0 like thumb_down_alt 0 dislike
3 views 1 answer
Description :

For AM, fc =500kHz , fm = 5 kHz Determine: (i) Upper and lower sideband frequencies (ii) Bandwidth

Answer :

Given data fc = 500KHz , fm = 5KHz USB =fc+fm USB = 500+5  =505 KHz. LSB =fc – fm LSB = 500 – 5  =495 KHz Bandwidth = 2fm .  = 2* 5 =10 KHz

thumb_up_alt 0 like thumb_down_alt 0 dislike
2 views 1 answer
Description :

For a transmission line, the incident voltage. Ei = 6V and Er =2V ,Calculate: (i) Reflection Coefficient (ii) SWR

Answer :

Reflection Coefficient(K) = Er / Ei  = 2V / 6V  K = 0.333 SWR = 1+K / 1- K  = 1+0.333 / 1-0.333  = 1.333 / 0.667 SWR= 1.998

thumb_up_alt 0 like thumb_down_alt 0 dislike
3 views 1 answer
Description :

Explain the working of half dipole antenna with its radiation pattern. 

Answer :

Half wave dipole antenna diagram Explanation: 1. It is a resonant antenna 2. It is exact half wavelength (λ /2) long & open circuited at one end. 3. The dipole ... waves exist. Hence radiation pattern is bidirectional. The radiation pattern of half wave dipole antenna is -

thumb_up_alt 0 like thumb_down_alt 0 dislike
15 views 1 answer
Description :

Explain structure of rectangular microstrip patch antenna with its radiation pattern. 

Answer :

In telecommunication, a microstrip antenna (also known as a printed antenna) usually means an antenna fabricated using microstrip techniques on a printed circuit board (PCB).It is a kind of ... microstrip transmission line with equivalent loads on either end to represent the radiation loss.

thumb_up_alt 0 like thumb_down_alt 0 dislike
17 views 1 answer
Description :

A half wavelength Dipole antenna has _________ Radiation Pattern  a. Hemispherical b. Omni-Directional c. Isotropic d. End fire

Answer :

A half wavelength Dipole antenna has Omni-Directional Radiation Pattern 

thumb_up_alt 0 like thumb_down_alt 0 dislike
43 views 1 answer
Description :

Define the following terms: (i) Data abstraction (ii) Class (iii) Dynamic binding (iv) Polymorphism

Answer :

(i) Data abstraction: Abstraction refers to the act of representing essential features without including the background details or explanation. Data abstraction is the process of defining a data type, often ... more than one form at different instances depending on the type or number of arguments. 

thumb_up_alt 0 like thumb_down_alt 0 dislike
3 views 1 answer
Description :

Which of the following set of statements represents acceptable propositions in respect of teaching-learning relationships? Choose the correct code to indicate your Answer. (i) When students fail in a test, it is the teacher who fails. (ii) Every teaching must aim at ensuring learning. (iii) There can be teaching without learning taking place (iv) There can be no learning without teaching. ... ) (i), (ii), (iii) and (v) (C) (iii), (iv), (v) and (vi) (D) (i), (ii), (v) and (vi)

Answer :

Answer: B

thumb_up_alt 0 like thumb_down_alt 0 dislike
8 views 1 answer
editAsk a Question
...