Radar Jargon and Definitions
"A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M",
"N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z"

Unbalanced Crystal Mixer: Circuit consisting of a section of coaxial transmission line one-half wavelength long that is tuned to the difference (intermediate) frequency between the local oscillator and rf echo signals. A some what related page covers RF Mixer Vendors.

Unbalanced Modulator: A modulator in which the modulation factor is different for the alternate half- cycles of the carrier.

Unbalanced transmission line: A transmission line one of whose conductors is grounded. A standard condition which occurs with the usage of Coaxial Cable implementations.

Undesired Signal: Any signal that tends to produce degradation in the operation of equipment or systems. Noise.

Unidirectional: In one direction only.

Unidirectional Array: An array that radiates in only one general direction.

Uniform Linear Array: An antenna composed of a relatively large number of usually identical elements arranged in a single line or in a plane with uniform spacing and usually with a uniform feed system.

Uniform-Spectrum Random Noise: Random noise, see White noise.

Unit Impulse: A mathematical artifice consisting of an impulse of infinite amplitude and zero width, and having an area of unity. Note: The unit impulse is useful for the mathematical expression of the impulse response, i.e., the transfer function, of a device.

Up-Converter: A device that translates frequencies from lower to higher frequencies.




 
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