This QRP SWR meter was designed for using with my Yaesu FT-817ND transceiver. Actually, it is antenna impedance meter based on Wheatstone bridge where antenna represents the unknown resistance. The ...

If you’re a regular reader of Hackaday, you may have noticed a certain fondness for Meshtastic devices, and the LoRa protocol ...

If you’ve ever heard the sound of an aircraft passing overhead and looked at an online plane tracker to try and figure out what it was, then you’ve interacted with ADS-B. It’s a protocol designed to ...

Abstract: In this paper, a measurement scheme, which eliminates the interference of the common mode current, for electrically small antennas is proposed. Firstly, the causes and effects of common mode ...

Abstract: Concept of ringed stacked patch antenna with low side lobe level and enhanced bandwidth is introduced for radio altimeter avionics applications. One dimensional electromagnetic band gap is ...

RF front ends are advancing through the integration of high-frequency passive networks with increasingly efficient active devices engineered for ultra-wide bandwidths and constrained power envelopes.