Antenna Fundamentals

1. Types of antenna

1.1. Wire Antennas

1.1.1. Short Dipole Antenna

1.1.2. Dipole Antenna

1.1.3. Monopole Antenna

1.1.4. Loop Antenna

1.2. Aperture Antennas

1.3. Microstip Antennas

1.4. Array Antennas

1.5. Reflector Antennas

1.6. Lens Antennas

2. ANTENNA PARAMETERS

2.1. Reciprocity

2.2. The Friis Formula: Antennas in Free Space

2.3. Bandwidth

2.4. Power Gain

2.5. Radiation Resistance and Efficiency

2.6. Radiation Pattern

2.7. Directivity

2.8. Effective Aperture

2.9. Beamwidth and Directivity

2.10. Polarisation Matching

3. Radiation Pattern

3.1. Radiation Pattern Lobes

3.1.1. major or main lobe

3.1.2. minor lobes

3.1.3. side lobes

3.1.4. back lobes.

3.2. Radiation Properties

3.2.1. power flux density

3.2.2. radiation intensity

3.2.3. field strength

3.2.4. directivity

3.2.5. phase or polarization.

4. An antenna is defined as a metallic device (as a rod or wire) for radiating or receiving radio waves, or an aerial as a means for radiating or receiving radio waves.