bth 2013 hussain.pdf (2593 kB, öppnas i nytt fönster)

Table of Contents
1 FUNDAMENTALS OF ANTENNAS .................................................................... 1
1.1 INTRODUCTION ................................................................................................ 1
1.2 ANTENNA PARAMETERS .................................................................................... 2
1.2.1 Antenna Pattern ...................................................................................... 2
1.2.2 Gain ........................................................................................................ 2
1.2.3 Radiation Intensity .................................................................................. 2
1.2.4 Resonant Frequency ............................................................................... 2
1.2.5 Beam width ............................................................................................. 2
1.2.6 Directivity ................................................................................................ 3
1.2.7 Antenna Efficiency .................................................................................. 3
1.2.8 Beam width Efficiency ............................................................................. 3
1.2.9 Bandwidth ............................................................................................... 3
1.2.10 Polarization ............................................................................................... 3
1.3 ANTENNAS TYPES ............................................................................................ 3
1.3.1 Wire Antennas ........................................................................................ 4
1.3.2 Loop Antennas ........................................................................................ 4
1.3.3 Arrays Antennas ..................................................................................... 4
1.3.4 Aperture Antennas .................................................................................. 4
1.3.5 Horn Antennas ........................................................................................ 5
1.3.6 Reflector Antennas ................................................................................. 5
1.3.7 Micro Strip Antennas ............................................................................... 6
1.3.8 Smart Antennas ...................................................................................... 6
1.4 WHY RECONFIGURABLE ANTENNAS? ................................................................. 7
1.5 AIMS AND OBJECTIVES ..................................................................................... 7
1.6 METHODOLOGY ............................................................................................... 8
1.7 DISSERTATION LAYOUT .................................................................................... 8
2 RECONFIGURABLE ANTENNAS .................................................................... 10
2.1 INTRODUCTION .............................................................................................. 10
2.2 SIGNIFICANT PARAMETERS INTENDED FOR ANTENNA FUNCTION ......................... 11
2.2.1 Frequency Response ............................................................................ 11
2.2.2 Radiation pattern ................................................................................... 12
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