Application Note
page 20 of 33
V1.7
2022-08-01
XENSIV™ BGT60LTR11AIP shield
60 GHz radar system platform
Radar MMIC settings configuration
4.4
Operating frequency
Autonomous mode
QS4 is used to set the operating frequency for the MMIC in the 60 GHz ISM band, which is important to meet
worldwide regulation requirements, possible settings are detailed in Table 7.
Table 7
QS4 settings
QS4
Device operating frequency
PCB configuration
ground (default) 61.1 GHz
J2 = 0 Ω
R4 = DNP*
open
61.2 GHz
J2 = DNP*
R4 = DNP*
100 kΩ to V
DD
61.3 GHz
J2 = DNP*
R4 = 100 kΩ
V
DD
61.4 GHz
J2 = DNP*
R4 = 0 Ω
*DNP : Do Not Populate/Do Not Place
SPI mode
In SPI operation mode, the user can set the device operation frequency by writing to
pll_fcw
(Reg5[11:0]) bit
fields of the MMIC SPI registers. The BGT60LTR11AIP device operates in the frequency band from 61 GHz to 61.5
GHz.
Note:
Please keep a 50 MHz guard band, each side from the band edge, to avoid outside of ISM band
emission.
Note:
Sensors operating in close vicinity at the same operating frequency can interfere. To avoid that,
please set different operating frequency for each device, with at list a difference of 12 MHz
