Integration Instructions

Document Information Page 19 of 31
FSS JODY-W263 Integration Instructions Rev 02.docx
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Item
Requirements
Remarks
Isolation
(in-band)
S21 > 25 dB recommended
S21 > 20 dB acceptable
The antenna to antenna isolation is
the S
21
parameter between the two
antennas in the band of operation.
Isolation
(out-of-band)
S21 > 35 dB recommended
S21 > 30 dB acceptable
Out-of-band isolation is evaluated
in the band of the aggressor to
ensure that the transmitting signal
from the other radio is sufficiently
attenuated by the receiving antenna
to avoid saturation and
intermodulation effect at the
receiver’s port.
Envelope correlation
Coefficient (ECC)
ECC < 0.1 recommended
ECC < 0.5 acceptable
The ECC parameter correlates the
far field parameters between
antennas in the same system. A low
ECC parameter is fundamental to
improve performance in MIMO-
based systems.
Table 11: Summary of MIMO and Wi-Fi/Bluetooth coexistence requirements. MIMO is not applicable for
JODY-W2.
6.3 Reference design of RF path
JODY-W2 is certified with a set-up including JODY-W2 module board with it’s RF paths
connected to the carrier board with RF coaxial cables. The antennas are connected to the carrier
board through SMA connectors. Below are the relevant components listed.
• Module board including U.FL connectors with JODY-W2 mounted.
• Carrier board including U.FL connectors to interface the module board and SMA
connectors to connect antennas.
• Coaxial cables with U.FL connectors connecting the module board’s RF traces to the
carrier board’s RF traces.
• Antennas connected to the carrier board’s SMA connectors.
Figure 3: Definition of Module board and Carrier board