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ANTENNAS AND PROPAGATION

Subject Code : EC 703 Credits: 4:0:1

Prerequisites : Electromagnetic

Course Coordinator :Nuthan Prasad & Naga Ravikanth

Course Objectives:1. Al! the concets o" vector coordinates and #ave theor! "or the anal!sis o" radiation

attern$ "ield comonents in electromagnetism.

%. nderstand 'asic antenna arameters.

3. Areciate the imortance o" antennas "or di""erent "re(uenc! and various alications.

). *llustrate various usage o" antenna '! designing and sketching the radiation atterns.

+. *llustrate the signal transmission '! designing a suita'le antenna using so"t#are tools.

,. -esign an! antenna #hich has good directivit! and 'eam #idth #hich can 'e used in

ractical alication.

7. nderstand di""erent roagation concets like /$ *onoshere and sur"ace #ave.

. nderstand the e""ect o" relative ermittivit! and conductivit! in ionoshere "or #ave

roagation.

UNIT1

ANTENNA !ASICS: *ntroduction$ 'asic Antenna arameters$ atterns$ 'eam area$ radiation

intensit!$ 'eam e""icienc!$ directivities and gain$ antenna aertures$ e""ective height$ 'and#idth$radiation e""icienc!$ antenna temerature and antenna "ield 2ones.

UNIT"

POINT SOURCES AND ARRA#S: *ntroduction$ oint sources$ o#er atterns$ o#er

theorem$ radiation intensit!$ "ield atterns$ hase atterns. Arra! o" t#o isotroic oint sources$

rinciles o" attern multilication$ 'road side$ end "ire arra! and asen & #ood!ard arra!$

UNIT$

E%ECTRIC DIPO%ES AND T&IN %INEAR ANTENNAS: *ntroduction$ short electric diole$

"ields o" a short diole$ radiation resistance o" short diole$ "ield atterns o" diole in general$ 45%

diole$ radiation resistances o" 45% thin linear antenna$ long #ire antenna$ "olded diole antennas.

mall loo$ comarison o" "ar "ields o" small loo and short diole$ "ar "ield atterns o" small

circular loo$ radiation resistance$ directivit!$ elical Antenna$.

UNIT4

ANTENNA T#PES : 6agida arra!$ ara'olic re"lectors$ log eriodic diole antenna$ lens

antenna$ 8a'inet9s rincile $ horn antennas$ rectangular horn antennas.

'icrostri( A)te))*s: salient "eatures$ Advantages & limitations$ Rectangular microstri

antennas$ eed methods$ Characteristics o" microstri antennas.

UNIT+

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RADIO ,A-E PROPAGATION: *ntroduction$ "ree sace roagation$ ground re"lection$

sur"ace #ave$ di""raction$ sace #ave roagation.

*onoshere roagation$ electrical roerties o" the ionoshere$ e;ressions "or conductivit! and

relative ermittivit!.

TE.T !OO/S:

1. ourth edition$ ?ata @cra# ill %00,$ Bohn -raus$ Ronald B @arhetka$ Ahmad han.

REERENCE !OO/S:

1. Antennas D Bohn - raus$ @c ra# ill$ %ndedition$ 1.

%. amont F 8lake$ $ citech Pu'lishing$

%00.

3. Antenna$ ?heor!$ Anal!sis & -esign D Constantine A 8alanis$ Bohn =ile! & ons$ %ndedition. 17

Course Assesse)t *)d Ev*2u*tio):

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surve!End o" course Iuestionnaire 1$ %&3

Iuestion "or C*E and EE #ill 'e designed to evaluate the various educational comonents

G8loom9s ta;onom!H

Remem'er and understand the course content G%+JH

Al!ing the kno#ledge ac(uired "rom the course G#eight age )0JH

Anal!2ing and evaluating the related in"ormation G#eight age 1+JH

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Creating ne# kno#ledge G#eight age %0JH

Course Outcoe

1. Anal!2e the imortance o" "ar "ield$ near "ield and rincile o" riis transmission theor!.

%. ?o classi"! di""erent "ield atterns 'ased on short diole and hal" #ave length diole antennas.

3. -escri'e di""erent t!es o" antennas and their alications.

). Categories di""erent t!es o" roagation

'*((i); o< course outcoes it3 Pro;r*e outcoes

Course

/utcomes

Pro;r*e Outcoes

1 % 3 ) + , 7 10 11 1%

1 3 3 % % % % %

% 3 3 % % % % 3

3 % 3 % % % % 3 %

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Kemester end e;amination conducted "or 100 @arks. 8ased on C*E and EE grade is a#arded.