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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