Necessary Bandwidth

0211-EX-CN-2017 Text Documents

Elbit Systems of America

2017-04-07ELS_190185

Elbit Systems of America Request for FCC Experimental License

Form 442 File Number: 0211-EX-CN-2017
Form 442 Confirmation Number: EL645154
31 March 2017

Necessary Bandwidth Calculation

The necessary bandwidth was determined using the equation in Annex J of the NTIA Manual1
for FM-pulsed radars (see Equation 1).

1.79
𝐵𝑛 = 𝐵(−20 𝑑𝐵) = + 2𝐵𝑐 (1)
√𝑡𝑟 ∙𝑡

where

Bn = necessary bandwidth, MHz
tr = pulse rise time, s
t = pulse width, s
Bc = frequency deviation (chirp) bandwidth, MHz

The Elbit FOPEN radar emission characteristics are given in Table 1. Applying these parameters
to Equation 1, results in a maximum necessary bandwidth of 152.83 MHz.

Table 1 Emission Characteristics
Pulse width 0.4-2 s
Pulse rise/fall time 1 s
Maximum frequency deviation 150 MHz

1
Manual of Regulations and Procedures for Federal Radio Frequency Management, Washington, DC: US
Department of Commerce, National Telecommunications and Information Administration, 2008 (revision May
2011).

Document Created: 2017-04-01 14:48:47
Document Modified: 2017-04-01 14:48:47

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