Skip navigation

RF (Radio Frequency)

November 2019 Previous month
kmikemoo

Antenna Radiation

Posted by kmikemoo Nov 22, 2019
Okay, so it's really antenna radiation pattern testing - but that isn't as catchy. Yes, there is modeling software and, yes, it is accurate.  But nothing really beats a hard measurement.   My objective is to validate antenna radiation patterns.  Because I'm going for pattern, not true power levels, I will use relative values; whatever the meter gives me.  I will focus on the 2 meter band, 144 MHz to 148 MHz. Before anyone freaks out, yes, I am a licensed amateur radio op ...
Project Goal: React on receiving a LoRa message and forward it as an SMS.   A transmitter will send LoRa messages on demand. A receiver will listen for messages and when it picks up a communication, sends the payload as SMS.   Components: 2 SemTech LoRa MBED shields with Antennas 1 Arduino MKR 1040 GSM with Antenna 1 more Arduino MKR 1xxx or any 3V3 model. 16 jumper wires 1 data enabled active SIM card   Scenario  There are two Arduinos with a SemTech LoRa shield c ...