Necessary Bandwidth Description

0375-EX-PL-2015 Text Documents

ELTA North America

2015-06-05ELS_163305

ELTA North America Request for FCC Experimental License

Form 442 File Number: 0375-EX-PL-2015
Form 442 Confirmation Number: EL853958
05 June 2015

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 ELTA NA EL/M-2026B emission characteristics are given in Table 1. Applying these
parameters to Equation 1, results in a maximum necessary bandwidth of 21.3 MHz.

Table 1 Emission Characteristics
Pulse width 1.2 s
Pulse rise/fall time 10 ns
Maximum frequency deviation 2.5 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: 2015-06-05 16:04:05
Document Modified: 2015-06-05 16:04:05

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