feild expedient antenas.doc - UNITED STATES MARINE CORPS...

  • No School
  • AA 1
  • aapalchesko
  • 12

This preview shows page 1 - 3 out of 12 pages.

UNITED STATES MARINE CORPS SCHOOL OF INFANTRY - EAST AND WEST TRAINING COMMAND CAMP LEJEUNE, NORTH CAROLINA 28542-0161 CAMP PENDELTON, CALIFORNIA 92055-5101 STUDENT OUTLINE FIELD EXPEDIENT ANTENNAS SSC0303 07/23/2015 LEARNING OBJECTIVE FOR THIS LESSON b. ENABLING LEARNING OBJECTIVE . (1) Given a filled HF radio, frequency, and a field expedient antenna kit, communicate with a field expedient antenna to obtain positive communication with a distant station. (0317- PAT-2003c) STUDENT INFORMATION OVERVIEW : The purpose of this period of instruction is to familiarize you with field expedient antennas so you are able to employ a field expedient antenna. I will do this by covering antenna concepts, terms and definitions, components, construction materials, formulas, and common antenna types. This lesson relates to all communications instruction. CLASS PREPARATION : Read this handout prior to class. OUTLINE : 1. ANTENNA CONCEPTS, TERMS AND DEFINITIONS . a. Antenna Concepts . The purpose of an antenna is to accept
energy from the transmitter and radiate it in the direction of the distant station. With any radio system the capabilities are limited by the design of the system. The radio will only put out so much power, but power is not necessarily the answer to establishing or maintaining a difficult radio circuit. Operator training, equipment maintenance and employing a radio system to maximize the systems capabilities and minimize the factors that have a negative impact on the radio circuits will give us the best chance of success. Often field expedient antennas are considered only a temporary fix for a broken component antenna. In reality, the use of field expedient antennas can greatly enhance our radio systems. The key in obtaining optimum performance from the systems we use is understanding the basics of how they work and how to improve them. In order to properly use field expedient antennas, you must understand some basic concepts of antennas. The obvious purpose of an antenna is to accept RF energy from the transmitter and to radiate it in the direction of the distant station. b. A basic antenna is nothing more than a conductor. RF energy will be radiated vertically in all directions. (1) All antennas have a radiation pattern that radiates energy in the horizontal and vertical plane. The "antenna pattern" is a graphic representation of the radiation pattern, usually depicted in either the horizontal plane or vertical plane. Look at the graphic below and notice that it is relatively easy to combine the information of both the vertical and horizontal patterns and understand the elevation and direction that the main radiation lobe is being radiated. 2

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture