Introduction to Tuning and De-tuning Antennas

This document provides an overview of important antenna specifications and information about how to tune and de-tune antenna mechanisms. You can use this document to help make informed decisions about your antenna requirements in a long-range wide area network (LoRaWAN®)-based end-node.

An antenna is a conducting circuit element used for radiating or receiving electromagnetic waves. An antenna’s structure is typically a fraction, or multiple, of the wavelength at the frequency of operation. In this document we will discuss the most common types of antennas encountered in LoRaWAN-based end devices, the electrically-short (E-field) antenna.

Note: This document will not provide information about:

• General antenna functionality
• Transmission lines
• Impedance matching theory
• The relationship between radiated field strength and conducted power levels

For more information about these topics, see the References section.