US 11,990,928 B2
SAR measurement for a combined 5G and LTE RF device
Benoit Derat, Munich (DE); Michael Herchel, Munich (DE); and Christian Dobmeier, Germering (DE)
Assigned to Rohde & Schwarz GmbH & Co. KG, Munich (DE)
Filed by Rohde & Schwarz GmbH & Co. KG, Munich (DE)
Filed on Aug. 17, 2020, as Appl. No. 16/995,457.
Claims priority of application No. 19197946 (EP), filed on Sep. 18, 2019.
Prior Publication US 2021/0080523 A1, Mar. 18, 2021
Int. Cl. H04B 1/3827 (2015.01); G01R 29/08 (2006.01)
CPC H04B 1/3838 (2013.01) [G01R 29/08 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method for measuring the specific absorption rate SAR of a mobile device under test (DUT) enabled for a combined LTE RF and 5G RF transmission, the method comprising the following steps:
a) providing a mobile device under test (DUT) operable in LTE RF and 5G standard,
b) setting the (DUT) in a mode to transmit with maximum power level according to the 5G standard, and at the same time transmitting with lower power level of LTE RF standard,
c) performing a SAR scan and measuring the 5G signal, without taking into account any contribution from the LTE RF signal,
d) setting the (DUT) in a mode to transmit with maximum power at maximum power in LTE RF standard, without transmitting according to the 5G standard,
e) performing a SAR scan and measuring the LTE RF standard signal, and
f) combining the results of step c.) and e.) in order obtain a combined SAR value.