Rod Antenna

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Component selectionDesign tips

Characteristics

The overview shows typical components for the design of radio interfaces with rod antennas. This includes a rod antenna, connectors and matching network, as well as the radio module and ESD protection.

The generated near-field by the externally mounted rod antenna is significantly influenced by the immediate environment. The main influencing factors are metals, batteries/accumulators, casings and human bodies. The position of the rod antenna in relation to the PCB and the PCB size/geometry also affect the antenna characteristics. The PCB interacts together with the rod antenna and together they form the radiating structure. Due to the external placement, as well as its mechanical length, the rod antenna is proportionately tolerant to detuning by various influencing factors.

However, depending on the application, the rod antenna may be out of tune by the influencing factors as well as the PCB configuration. With the help of RF inductors and RF capacitors, which form a matching network, the rod antenna can be matched to the required frequency range.

Application Notes

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