Integration Guide
Table Of Contents
- Preface
- Contents
- 1 System description
- 1.1 Overview
- 1.2 Architecture
- 1.3 Pin-out
- 1.4 Operating modes
- 1.5 Power management
- 1.6 System functions
- 1.7 RF connection
- 1.8 SIM interface
- 1.9 Serial Communication
- 1.10 Audio
- 1.11 ADC input (LEON-G100 only)
- 1.12 General Purpose Input/Output (GPIO)
- 1.13 M2M Setup Schematic Example
- 1.14 Approvals
- 2 Design-In
- 3 Handling and soldering
- 4 Product Testing
- Appendix
- A Extra Features
- B Glossary
- Related documents
- Revision history
- Contact
LEON-G100/G200 - System Integration Manual
GSM.G1-HW-09002-F3 Preliminary Design-In
Page 84 of 101
For good antenna radiation performance, antenna dimensions should be comparable to a quarter of the
wavelength. Different antenna types can be used for the module, many of them (e.g. patch antennas,
monopole) are based on a resonating element that works in combination with a ground plane. The
ground plane, ideally infinite, can be reduced down to a minimum size that must be similar to one
quarter of the wavelength of the minimum frequency that has to be radiated (transmitted/received).
Numerical sample: frequency = 1 GHz wavelength = 30 cm minimum ground plane (or antenna
size) = 7.5 cm. Below this size, the antenna efficiency is reduced.