User's Manual

User Manual
Version 01.00
2010-01-25
deRFmega128-22A001 and deRFmega128-22A021
dresden elektronik
ingenieurtechnik gmbh
Enno-Heidebroek-Str. 12
01237 Dresden
Tel.: 0351 – 31 85 00
Fax: 0351 – 3 18 50 10
[e-mail]
www.dresden-elektronik.de
Page 16 of 20
10. RF components
10.1. deRFmega128-22A001
The chip antenna on the deRFmega128-22A001 is matched with:
• L1 = 1,0nH (0402)
• L2 = 2,2nH (0402)
Some hints for the positioning of the radio module:
• avoid metallized environments in the near
è mismatching of the antenna
è decreased transmit-range
• place the module at the edge of a device
Figure 10: Matching circuit with chip-antenna