Measurement of HF antenna impedances
J.R. Moritz · 1999
This paper describes the design of an antenna reflection coefficient measurement system. The prototype measures the real and imaginary components of the reflection coefficient (/spl rho/) in the frequency range 1.8 MHz-30 MHz. The system is able to operate with high level ambient signals present at the antenna feed point, whilst maximum measuring signal power delivered to the antenna is limited to 1 /spl mu/W. An experimental evaluation of the prototype is described. The measurement error is equivalent to less than 5% in magnitude |/spl rho/|, and 4/spl deg/ in phase </spl rho/.