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Antenna or transmission line tower designed to withstand unbalanced mechanical pull from all the conductors in one direction together with the wind strain and vertical loads.



Related Terms

ACOUSTIC COUPLER

A device used between the modem of a computer terminal and a standard telephone line to permit transmission of digital data in either direction without making direct connections.

ANGLE STRUCTURE

A method of building a tower for mechanical strength in which braces are placed at angles with respect to the vertical support rods.

WIND SHEAR

A change in wind direction or speed in a short distance, resulting in a shearing effect. It can act in a horizontal or vertical direction and, occasionally, in both. The degree of turbulence increases as the amount of wind shear increases.

ANTENNA COUPLER

  1. A radio-frequency transformer used to connect an antenna to a transmission line or to connect a transmission line to a radio receiver. 2. A radio-frequency transformer, link circuit, or tuned line used to transfer radio-frequency energy from the final plate-tank circuit of a transmitter to the transmitter to the transmission line feeding the antenna.

GAIN REFERRED TO A SHORT VERTICAL ANTENNA

The gain of an antenna in a given direction when the reference antenna is a perfect vertical antenna, much shorter than one quarter of the wavelength, placed on the surface of a perfectly conducting plane earth.

LUBBER'S LINE

The vertical line inside a compass case indicating the direction of the ship's head.

DRIFTING SNOW

Snow raised from the ground and carried by the wind to such a height that the horizontal visibility is considerably reduced but the vertical visibility is not materially diminished. The expression BLOWING SNOW is used when both the horizontal and vertical visibility are considerably reduced.

CURTAIN

A sagging line caused by a too much paint or varnish on a vertical surface.

LEADER

A vertical drain line on multi-story buildings employed to drain storm water into the storm sewer system.

LINE OF FORCE

A line indicating the direction in which a force acts, as in a magnetic field

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