Testing; Voltage Standing Wave Ratio (Vswr) - Sierra Wireless MC5725 Hardware Integration Manual

CDMA and GSM / UMTS Mini Card Hardware Integration Guide
106
In the event of a discrepancy in values between this guide and the Product Specification Document (PSD), the PSD takes precedence.
measured (and averaged) over ‐45
°
± 180 in azimuth.
Maximum gain and uniform coverage in the high elevation
•
angle and zenith. Gain in the azimuth plane is not desired.
• Average 3D gain: > ‐5 dBi
Typical VSWR: < 2:1
•
Polarization: any other than LHCP (left‐hand circular
•
polarized) is acceptable
The same design procedures outlined in Interference and
sensitivity on page 41 apply to the GPS path as well.

Testing

The performance specifications described in this section are
valid while the antenna is mounted in the host device with the
antenna feed cable routed in its final application configuration.
The following guidelines apply to the tests in this section:
Perform electrical measurements at room temperature
•
(+20°C to +26°C) unless otherwise specified
For main and diversity path antennas, make sure the
•
antennas (including contact device, coaxial cable,
connectors, and matching circuit with no more than six
components, if required) have nominal impedances of 50
across the frequency bands in Table A‐4.
All tests (except isolation / correlation coefficient) — t est the
•
main or diversity antenna with the other antenna termi‐
nated.
• Any metallic part of the antenna system that is exposed to
the outside environment needs to meet the electrostatic
discharge tests per IEC61000‐4‐2 (conducted discharge
+8kV).
The functional requirements of the antenna system are
•
tested and verified while the MiniCard antenna is
integrated in the host device.
Note: Additional testing, including active performance tests,
mechanical, and accelerated life tests can be discussed with Sierra
Wireless' engineering services. Contact your Sierra Wireless repre-
sentative for assistance.

Voltage Standing Wave Ratio (VSWR)

Measure VSWR for each antenna (main, diversity) using the
following criteria:
Proprietary and Confidential
° °
to +90 in elevation and
Ω
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