antenna parameters

Q1: Which antenna parameter has the most direct impact on signal coverage?

• Antenna Height

• Frequency

• Cable Length

• Modulation Type

What is the main benefit of using a directional antenna?

• Increases interference

• Reduces interference

• Reduces signal strength

• Improves battery life

Lowering an antenna in a valley will generally:

• Improve coverage everywhere

• Reduce interference in high-elevation areas

• Increase interference

• Have no effect

Which configuration minimizes interference the most?

• Omnidirectional antenna in an urban setting

• Directional antenna in a three-sector system

• Lowering antenna height below tree level in a forest

• Using the same frequency across all cells

A six-sector antenna configuration results in:

• More available channels but lower efficiency

• Reduced interference but lower trunking efficiency

• Increased interference but better call quality

• Higher energy consumption

If an antenna’s original height is h1 = 60 meters and is lowered to 0.5h1, what is the new effective height using the formula he1 = (2/3)h1?

(a)  

A three-sector antenna system reduces the number of interferers from 6 to 2. If the original Carrier-to-Interference (C/I) ratio in an omnidirectional setup was 14 dB, estimate the new C/I ratio.

(a)