The above properties of antennas are derived from the reciprocity principle of an antenna which may be stated as the 2 Introduction An antenna is a transducer that converts radio frequency electric current to electromagnetic waves that are radiated into space In two-way communication, the same antenna … 2 Introduction An antenna is a transducer that converts radio frequency electric current to electromagnetic waves that are radiated into space In two-way communication, the same antenna can be used for transmission and reception 3. perfect antenna does not exist, even in theory! An Introduction to Antenna Basics August 24, 2016 by Mark Hughes Antennas are used to transmit and receive electromagnetic energy. An antenna is a passive structure that serves as transition between a transmission line and air used to transmit and/or receive electromagnetic waves. The theoretically perfect antenna can never be built… because theory itself is not perfect! Dr. Sandra Cruz-Pol ; Electrical and Computer Engineering ; University of Puerto Rico at Mayaguez; 2 What is an antenna? Free space loss, ideal isotropic antenna •P t = signal power at transmitting antenna •P r = signal power at receiving antenna •λ = carrier wavelength •d = propagation distance between antennas •c = speed of light (≈ 3 x 108 m/s) where d and λ are in the same units (e.g., meters) ()() 2 2 2 42 4 c d fd P P r t! For example, a 2x2 MIMO configuration is 2 antennas to transmit signals (from base station) and 2 antennas to receive signals (mobile terminal). An antenna ideally appears as a resistor to the transmitter. Title: Review of Antenna theory 1 Review of Antenna theory. The PowerPoint PPT presentation: "Basic Antenna Theory and Concepts" is the property of its rightful owner. Document presentation format: On-screen Show Other titles: Arial Times New Roman Symbol Default Design Microsoft Excel Chart Microsoft Equation 3.0 MathType 5.0 Equation Basic Antenna Theory Purpose Outline Quiz Intended & unintended radiators Antenna purpose Antenna functions Monopole (dipole over plane) Outline Antennas for laptop applications Slide 11 Slot & INF antennas Example … Basic Antenna Theory and Application A Major Qualifying Project Report: Submitted to the Faculty of the WORCESTER POLYTECHNIC INSTITUTE ... antenna can be used to provide stronger signals over densely populated areas such as city streets and . Isotropic antenna (idealized) oRadiates power equally in all directions Dipole antennas oHalf-wave dipole antenna (or Hertz antenna) oQuarter-wave vertical antenna (or Marconi antenna) Parabolic Reflective Antenna oUsed for terrestrial microwave and satellite applications oLarger the diameter, the more tightly directional is the beam Dual Katalog 2014 71.