Search Results for: stl

Review of Boswell et al paper “Performance of a small loop antenna in the 3-10 MHz band”

(Boswell et al 2005) discussed a small transmitting loop (STL) and offered predictions and measurements of performance. This article is a review of the discussion at 7MHz. The STL is a 1m diameter circular loop of 22mm diameter copper conductor at 1,5m height over ground with parameters δ=0.005 and ε=10. Performance is assessed by prediction … Continue reading Review of Boswell et al paper “Performance of a small loop antenna in the 3-10 MHz band”

The Army Loop (Patterson match)

The ARRL and other publications refer to the Army Loop or Patterson match. Patterson described his antenna system at (Patterson 1967). Hams seem to call any configuration that uses only capacitors in the matching circuit a Patterson or Army loop, though they are incorrect. The ARRL Antenna Book 21 has a nonsense circuit that cannot … Continue reading The Army Loop (Patterson match)

An example of Eb/N0 design with the Field strength / receive power converter

I have been asked whether the Field strength / receive power converter can be used to solve a Eb/N0 (Eb/N0) design problem. Eb/N0 is a method often used for specifying the relationship of signal and noise that will give adequate bit error rate in a data demodulator. Whilst the calculator was not specifically designed for that … Continue reading An example of Eb/N0 design with the Field strength / receive power converter

Where is the best place to measure feed point VSWR

The subject question is often asked, and the usual responses are mindless recitals of Rules of Thumb (RoT). In the light of the discussion at Feed line length affect on VSWR and The half waves of coax rule for measuring VSWR accurately, lets consider the subject question and develop a rational answer. Last update: 12th … Continue reading Where is the best place to measure feed point VSWR