Appendix III. DIPOLE ANTENNA KIT

TM 11-5820-919-12

APPENDIX III

DIPOLE ANTENNA KIT

A3-1.

GENERAL

1. Decide on the direction that transmission is

required and determine the alignment of the antenna (fig

A3-2. This appendix provides information on the dipole

A3-7).

antenna kit and general instructions for setting up

various versions possible with this kit.

2. Unwind one of the dipole antenna reels to the

length specified in the antenna length table A3-1. The

A3-3. The dipole antenna kit (fig A3-1) consists of two

equations for calculating dipole antenna lengths are:

reels of antenna wire with the required BNC plugs, two

reels of Dacron cord and weights, and a dipole lead-in

fixture. The components of the wire antenna kit can be

Each leg in feet

arranged in any of the following configurations: Slant

wire (fig A3-2), two-support dipole (fig A3-3), sloping

234

dipole (fig A3-4), or inverted-V dipole (fig A3-5). Figure

A3-6 details the attachment of the antenna wires to the

dipole fixture.

Full length of dipole antenna in feet

A3-4. SLANT WIRE ANTENNA. A slant wire antenna is

468

much more effective than the whip antenna. The slant

wire antenna requires the use of a dipole antenna (fig

A3-1) and an antenna support. It is used when greater

3. Loosen the antenna wire through the notch on

range is necessary than the whip antenna can provide,

the reel to present unwinding further and lay the reel

and when time or conditions do not allow the erection of

about 20 feet from the antenna support. Position the

a full horizontal dipole. The proper arrangement for a

radio set at the end of the antenna and insert the red

slant wire antenna is shown in figure A3-2. Erect a slant

plug of the antenna wire into the BNC connector of the

wire antenna as follows:

amplifier/coupler. Set ANT SEL switch to the BNC

(middle) position.

Figure A3-1. Dipole Antenna Kit

A3-1