ANTENNA CONSTRUCTION AND PROPAGATION OF RADIO WAVES

[Pages:225]MCI 2515H

MARINE CORPS INSTITUTE

ANTENNA CONSTRUCTION AND PROPAGATION OF RADIO WAVES

MARINE BARRACKS WASHINGTON, DC

UNITED STATES MARINE CORPS

MARINE CORPS INSTITUTE 912 POOR STREET S. E.

WASHINGTON NAVY YARD DC 20391-5680

IN REPLY REFER TO:

1550 Ser 2515 10 July 01

From: Director To: Marine Corps Institute Student

Subj: ANTENNA CONSTRUCTION AND PROPAGATION OF RADIO WAVES (MCI 2515H)

1. Purpose. The MCI 2515H, Antenna Construction and Propagation of Radio Waves, provides communicators with instructions in selecting and/or constructing the appropriate antenna(s) for use within the current field.

2. Scope. This course is designed as a course of study on the propagation of radio waves and the construction and repair of conventional and field expedient antennas.

3. Applicability. This course is intended for instructional purposes only. This course is designed for Marines in the ranks of private through gunnery sergeant in occupational fields 2500 and 2800.

4. Recommendations. Comments and recommendations on the contents of the course are invited and will aid in subsequent course revisions. Please complete the course evaluation questionnaire at the end of the final examination. Return the questionnaire and the examination booklet to your proctor.

G. E. GEARHARD Deputy

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Table of Contents

Page

Contents........................................................................................................................ i

Student Information ...................................................................................................... iii

Study Guide.................................................................................................................. v

Study Unit 1

Radio Communications .............................................................. 1-1

Lesson 1 Lesson 2

Radio Sets and Waves ................................................................ 1-3 Carrier Waves and Modulation................................................... 1-13

Study Unit 2

Propagation of Radio Waves ...................................................... 2-1

Lesson 1 Lesson 2 Lesson 3

Lesson 4 Lesson 5

The Atmosphere......................................................................... 2-3 Ground Waves and Sky Waves................................................... 2-15 Maximum Usable Frequency (MUF) and Lowest Usable Frequencies (LUF) .................................................................... 2-23 Fading ........................................................................................ 2-29 The Effects of Frequency on Wave Propagation ......................... 2-37

Study Unit 3

Antennas .................................................................................... 3-1

Lesson 1 Lesson 2 Lesson 3 Lesson 4 Lesson 5

Functions of an Antenna and Antenna Radiation ........................ 3-3 Antenna Polarization .................................................................. 3-11 Conventional Antennas .............................................................. 3-21 Field Expedient Antennas........................................................... 3-33 Transmission Lines .................................................................... 3-47

Study Unit 4

Site Selection and Antenna Grounding ....................................... 4-1

Lesson 1 Lesson 2 Lesson 3

Requirements for Site Selection.................................................. 4-3 Electronic Warfare Considerations ............................................. 4-11 Grounds and Counterpoises........................................................ 4-17

Appendix A

Field Expedient Antenna Construction ....................................... A-1

Appendix B

Joint Spectrum Center (JSC) ...................................................... B-1

Review Lesson.............................................................................................................. R-1

MCI Course 2515H

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MCI Course 2515H

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Student Information

Number and Title

MCI 25.15h ANTENNA CONSTRUCTION AND PROPAGATION OF RADIO WAVES

Study Hours 11

Course Materials

Text

Review Agency Marine Corps Communications-Electronic School, Marine Corps Air Ground Combat Center, Twentynine Palms, CA 92278

Reserve

4

Retirement

Credits (RRC)

ACE

Not applicable to civilian training/education

Assistance

For administrative assistance, have your training officer or NCO log on to the MCI home page at mci.usmc.mil to access the Unit Verification Report (UVR) or MCI Hotline. Marines CONUS may call toll free 1-800-MCIUSMC. Marines worldwide may call commercial (202) 685-7596 or DSN 325-7596.

For assistance concerning course content matters, call the Distance Learning Technologies Department's Support Division at DSN 325-7516 or commercial (202) 685-7516, or log on to the MCI home page at mci.usmc.mil/feedback/course developers.

MCI Course 2515H

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MCI Course 2515H

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Study Guide

Congratulations

Congratulations on your enrollment in a distance training course from the Distance Learning Technology Department (DLTD) of the Marine Corps Institute (MCI). Since 1920, the Marine Corps Institute has been helping tens of thousands of hard-charging Marines, like you, improve their technical job performance skills through distance training. By enrolling in this course, you have shown a desire to improve the skills you have and master new skills to enhance your job performance. The distance training course you have chosen, MCI 2515H, Antenna Construction and Propagation of Radio Waves, provides communicators with instructions in selecting and/or constructing the appropriate antenna(s) for use within the current field.

Your Personal ? YOU ARE PROPERLY MOTIVATED. You have made a positive

Characteristics

decision to get training on your own. Self-motivation is perhaps the most

important force in learning or achieving anything. Doing whatever is

necessary to learn is motivation. You have it!

? YOU SEEK TO IMPROVE YOURSELF. You are enrolled to improve those skills you already possess, and to learn new skills. When you improve yourself, you improve the Corps!

? YOU HAVE THE INITIATIVE TO ACT. By acting on your own, you have shown you are a self-starter, willing to reach out for opportunities to learn and grow.

? YOU ACCEPT CHALLENGES. You have self-confidence and believe in your ability to acquire knowledge and skills. You have the selfconfidence to set goals and the ability to achieve them, enabling you to meet every challenge.

? YOU ARE ABLE TO SET AND ACCOMPLISH PRACTICAL GOALS. You are willing to commit time, effort, and the resources necessary to set and accomplish your goals. These professional traits will help you successfully complete this distance training course.

Continued on next page

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