ZMN2405DB-R RFM, ZMN2405DB-R Datasheet - Page 5

• Manufacturer Part Number: ZMN2405DB-R
• Description: ADDITIONAL ZMN2405 DEVELOPMENT B
• Manufacturer: RFM
• Type: Zigbeer

Specifications of ZMN2405DB-R

• Frequency: 2.4GHz
• For Use With/related Products: ZMN2405
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 583-1118

RFIO Stripline
The RFIO pad on the radio module is connected directly to an antenna on the host circuit board, or to an MMCX
or similar RF connector. It is important that this connection be implemented as a 50 ohm stripline. Referring to
Figure 3, the width of this stripline depends on the thickness of the circuit board between the stripline and the
groundplane. For FR-4 type circuit board materials (dielectric constant of 4.7), the width of the stripline is equal to
1.75 times the thickness of the circuit board. Note that other circuit board traces should be spaced away from the
stripline to prevent signal coupling, as shown in Figure 4. The stripline trace should be kept short to minimize its
insertion loss.
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Figure 3
Figure 2
Trace Separation from
50 Ohm Microstrip
100 mil
150 mil
200 mil
250 mil
300 mil
Figure 4
Parallel to Microstrip
Length of Trace Run
125 mil
200 mil
290 mil
450 mil
650 mil
ZMN2405 - 5/20/08
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