Antenna Systems
Lesson 1: Antenna Fundamentals
General - is113250011
Functions of Antennas
Figure 2. Quarter-wave antenna connected to ground.
Figure 3. Wire counterpoises.
Radiation
Radiation Patterns
Radio waves
Figure 6. Radiation patterns from antennas.
Radiation Patterns - Continued
Radio Wave Propagation
Polarization - is113250021
Figure 9. Vertically polarized signal.
Advantages of vertical polarization.
Receiving Antennas
Antenna Siting
Antenna AT-984A/G
Installation.
Maintenance
Figure 13. AT-984A/G radiation pattern.
Antenna System RC-292
Figure 14. Antenna equipment RC-292.
Assemble Antenna Equipment RC-292
Assemble the mast. - is113250033
Figure 17. Attaching guy strap to guy stake.
Table 1. Antenna and ground-plane elements.
Complete antenna assembly.
Erect the Antenna Mast
Connect Antenna to Radio
Operator Checks and Services
Table 3. Operator's weekly PM checks and services.
Table 4. Organizational quarterly PM checks and services.
Antenna Group OE-254/GRC
Assemble Antenna Equipment
Assemble the mast. - is113250044
Figure 26. Guy attachment to guy anchor.
Figure 27. Pulling guy ropes taut.
Assemble the antenna AS-3166/GRC.
Connect feedcone assembly.
Figure 30. Strain clamp.
Erect the Antenna
Self-Evaluation
Self-Evaluation - Continued
Summary
Lesson 2: Field-Expedient Antennas
Operating hints.
Computing Wavelength
Antenna energy losses
Computing Wavelength - Continued
Improvising Whip Antennas
Improvising Vertical Antennas
Figure 36. Expedient vertical wire antennas.
Insulators
Figure 38. Improvised insulators.
Improvising Ground-plane Antennas
Improvising Horizontal (Doublet) Antennas
Expedient Long-Wire Antennas
Supporting the long-wire antenna
Half-rhombic antenna
Elevated Antennas
Figure 44. Illustration for Exercise 17.
Figure 45. Illustration for Exercise 20.
Summary - is113250072
Lesson 1: Antenna Fundamentals
General - is113250011
Functions of Antennas
Figure 2. Quarter-wave antenna connected to ground.
Figure 3. Wire counterpoises.
Radiation
Radiation Patterns
Radio waves
Figure 6. Radiation patterns from antennas.
Radiation Patterns - Continued
Radio Wave Propagation
Polarization - is113250021
Figure 9. Vertically polarized signal.
Advantages of vertical polarization.
Receiving Antennas
Antenna Siting
Antenna AT-984A/G
Installation.
Maintenance
Figure 13. AT-984A/G radiation pattern.
Antenna System RC-292
Figure 14. Antenna equipment RC-292.
Assemble Antenna Equipment RC-292
Assemble the mast. - is113250033
Figure 17. Attaching guy strap to guy stake.
Table 1. Antenna and ground-plane elements.
Complete antenna assembly.
Erect the Antenna Mast
Connect Antenna to Radio
Operator Checks and Services
Table 3. Operator's weekly PM checks and services.
Table 4. Organizational quarterly PM checks and services.
Antenna Group OE-254/GRC
Assemble Antenna Equipment
Assemble the mast. - is113250044
Figure 26. Guy attachment to guy anchor.
Figure 27. Pulling guy ropes taut.
Assemble the antenna AS-3166/GRC.
Connect feedcone assembly.
Figure 30. Strain clamp.
Erect the Antenna
Self-Evaluation
Self-Evaluation - Continued
Summary
Lesson 2: Field-Expedient Antennas
Operating hints.
Computing Wavelength
Antenna energy losses
Computing Wavelength - Continued
Improvising Whip Antennas
Improvising Vertical Antennas
Figure 36. Expedient vertical wire antennas.
Insulators
Figure 38. Improvised insulators.
Improvising Ground-plane Antennas
Improvising Horizontal (Doublet) Antennas
Expedient Long-Wire Antennas
Supporting the long-wire antenna
Half-rhombic antenna
Elevated Antennas
Figure 44. Illustration for Exercise 17.
Figure 45. Illustration for Exercise 20.
Summary - is113250072
