User's Manual
Table Of Contents
- Contents
- Tables
- Figures
- 1 Introduction
- 2 Interface Characteristics
- 2.1 Application Interface
- 2.2 RF Antenna Interface
- 2.3 Sample Application
- 3 Operating Characteristics
- 4 Mechanical Dimensions, Mounting and Packaging
- 5 Regulatory and Type Approval Information
- 6 Document Information
- 7 Appendix
Cinterion
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ELS31-/ELS51-US Hardware Interface Overview
2.2 RF Antenna Interface
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ELS31-US_ELS51-US_HIO_v01.000a 2016-12-28
Confidential / Preliminary
Page 22 of 46
2.2.2 RF Line Routing Design
2.2.2.1 RF Interface Signals Circuit Diagram Example
Figure 6 is a topology reference, and it is recommended not to deviate from this circuit for your
external application.
The RF inter-connects called RF Port 1 and RF Port 2 are examples only. Depending on the
RF antenna, the interfacing system will dictate the RF inter-connects.
Figure 6: RF interface signals example
Please be also aware of ESD protection required on the RF interface lines. ESD protection
might be utilized through the above pi-network (primarily intended for managing any additional
RF optimization needs), or by additional components in series with the pi-network illustrated
above.