Archive for the ‘Antenna’ Category.

Small “rubber-ducky” helical antenna for 868MHz

This simple Helical Antenna can be used for most LoRa (and other small wireless device) applications, where space constraints exist. The construction is simple, made from wound solid Ag plated copper wire taken from piece of coaxial cable.

Helical axial antenna for 868MHz

Two options how to use this antenna on the PCB modules

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Quick and dirty 868MHz antenna in 5 minutes

This is simple antenna for 868MHz built in 5…10 minutes. Take about 10cm of RG214, a plate of PCB with the copper at one (or both) sides. Remove the coax shield and inner dielectric on one side in length of about 85mm. You will cut this to proper length during SWR measurements.

Simple antenna made with piece of coax and piece of old PCB.

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Collinear antenna for 868MHz Lorawan Gateway

This is description of coaxial collinear antenna for 868MHz applications. I designed this for Lorawan gateway.

Antenna tested with lorawan gateway

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