SARA-R4 series - System integration manual
UBX-16029218 - R20 Design-in Page 66 of 128
C1-Public
In both of cases, selecting external or internal antennas, these recommendations should be observed:
• Select an antenna providing optimal return loss / VSWR / efficiency figure over all the operating
cellular frequencies.
• Select an antenna providing the worst possible return loss / VSWR / efficiency figure in the GNSS
frequency band, to optimize the RF coexistence between the cellular and the GNSS systems (see
section 2.4.4 for further details and guidelines regarding Cellular / GNSS RF coexistence).
• Select an antenna providing appropriate gain figure (i.e. combined antenna directivity and
efficiency figure) so that the electromagnetic field radiation intensity do not exceed the regulatory
limits specified in some countries, such as FCC United States (see section 4.2.2), ISED Canada
(see section 4.3.1), RED Europe (see section 4.4), GITEKI Japan (see section 4.8), etc.
2.4.2.2 Examples of cellular antennas
Table 23 lists some examples of possible internal on-board surface-mount antennas.
GSM / WCDMA / LTE SMD antenna
698..960 MHz, 1710..2170 MHz, 2300..2400 MHz, 2490..2690 MHz
40.0 x 6.0 x 5.0 mm
LTE SMD dielectric antenna
617..960 MHz, 1710..2690 MHz
54.6 x 13.0 x 3.0 mm
Wideband LTE SMD antenna
600..6000 MHz
32.0 x 25.0 x 1.6 mm
GSM / WCDMA / LTE SMD antenna
698..960 MHz, 1710..2170 MHz, 2300..2400 MHz, 2490..2690 MHz
35.0 x 8.5 x 3.2 mm
GSM / WCDMA / LTE SMD antenna
698..960 MHz, 1710..2170 MHz, 2490..2700 MHz
50.0 x 8.0 x 3.2 mm
GSM / WCDMA / LTE SMD antenna
698..960 MHz, 1710..2170 MHz, 2490..2700 MHz
50.0 x 8.0 x 3.2 mm
GSM / WCDMA / LTE vertical mount antenna
698..960 MHz, 1710..2700 MHz
50.6 x 19.6 x 1.6 mm
GSM / WCDMA / LTE SMD antenna
698..8000 MHz
30.0 x 3.0 x 1.0 mm
GSM / WCDMA / LTE SMD antenna
698..960 MHz, 1427..1661 MHz, 1695..2200 MHz, 2300..2700 MHz
42.0 x 10.0 x 3.0 mm
GSM / WCDMA / LTE vertical mount antenna
698..960 MHz, 1710..2170 MHz, 2300..2700 MHz
74.0 x 10.6 x 1.6 mm
GSM / WCDMA / LTE SMD antenna
698..960 MHz, 1700..2700 MHz
40.0 x 5.0 x 5.0 mm
Ceramic LTE SMD antenna
698..960 MHz, 1710..2170 MHz
40.0 x 6.0 x 5.0 mm
Table 23: Examples of internal surface-mount antennas