×
SUCCESS DOESN'T HAPPEN TO YOU. IT HAPPENS BECAUSE OF YOU
--Your friends at LectureNotes
Close

Note for ANTENNA ENGINEERING - AE by Anjana S

  • ANTENNA ENGINEERING - AE
  • Note
  • 32 Views
  • 1 Offline Downloads
  • Uploaded 9 months ago
0 User(s)
Download PDFOrder Printed Copy

Share it with your friends

Leave your Comments

Text from page-2

N I . S E T Antennas-Different O N U T K Downloaded from Ktunotes.in types

Text from page-3

Classifications • Many Types of antennas . The choice of antenna depends on • Frequency of operation • Radiation Pattern • Polarization, N • Gain requirements I . S E T O • Application TUN K I. Isotropic Directional Omnidirectional Point Source Star antenna Dipole Horn Parabolic Half wave Dipole Marconi Circular Loop Downloaded from Ktunotes.in

Text from page-4

Classifications II. Resonant Non Resonant • Length is in exact multiples of /2. • Length is other than in multiples of /2. • Open at both ends • Open end is excited • Not terminated in any resistance • The other end is terminated in characteristic impedance • Used at a fixed frequency • Forward/incident and backward/reflected waves exist • Standing waves exist N U T K • Radiation patterns are multi directional • Voltage and current are not in phase • Has distributed L and C and act as resonant circuit • Known as periodic antennas • Used at a range of frequencies and has a wider bandwidth N I . S OTE • No reflected waves exist • No Standing waves exist • Radiation patterns are uni directional • Pattern is not symmetric about =90 • It is a travelling wave antenna • Also called directional antennas • Known as aperiodic antennas • Egs: Long wire, V antenna, Rhombic antenna Downloaded from Ktunotes.in

Lecture Notes