User's Manual

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2.4 Antenna Design
2.4.1 Antenna specification
T77H468 also provides connectivity for off board antennas. The antennas and their
connection interface for this device satisfy the requirements specified in the PCI Express
M.2 Specification Revision 0.7a, Version 1.0 standard. The antenna elements are typically
integrated into the notebook/ultrabook /tablet and connected to T77H468 module via flexible
RF coaxial cables. T77H468 provides two RF connectors (MHF type), one for the primary
transmitter/receiver port and the other for the diversity receiver and GNSS.
To ensure stable RF performance, customer must assemble adequate antenna according to
the antenna specification.
Table 2-1 Main antenna specifications
Parameter Min. Typ. Max. Units Notes
Cable loss / / 0.5 dB Maximum loss to antenna
Impedance / 50 / ohm Antenna load impedance
VSWR / / 3:1 / Maximum allowed VSWR of antenna
Table 2-2 Aux antenna specifications
Parameter
Gain Maximum gain and uniform converge in high angle elevation
and zenith. Gain in the azimuth is not desired.
Average 3D gain >-5dBi
VSWR Typical value <3:1
Isolation(diversity to Main)
>10dB in all related bands
Polarization Any
2.4.2 Antenna location and mechanical design.
To ensure customer has a clear knowledge of the two antennas, check below product
picture.
Figure 2-1 Antenna connector location and type
Figure 2-2 RF connectors