Lecher wire system
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The Lecher wire system can be used to measure frequency of standing waves. This amounts to a yardstick approach in analyzing the wavelength of radiant energy, being a electronic filter with a high Q. When the measured distance of the weak points (which have narrow locations) in a transmission line (eg., several feet of two wires in a parallel line, at or below a foot apart) an understanding of the standing wave ratio could be obtained.
The Lecher wire system was developed by Ernst Lecher of Vienna circa 1890. The principles behind the Lecher wire system contributed to high-power transmission line and cavity resonator (eg., waveguide) development.
[edit] External links
- Ron Lebar, "The Lecher Line; Used in high frequency electronics, generation & measurement". 14-5-2005.
- "Index to Physics Demonstrations; Lecher wires". Physics Demonstrations, The University of Minnesota. 1997-06-16.
- "E-82. Electromagnetic Radiation; Demonstration Short-wave apparatus". Electricity/Magnetism, Lecture Demonstrations. Purdue University.
- M B Allenson, A R Piercy and K N R Taylor "An improved Lecher wire experiment". 1973 Phys. Educ. 8 47-49. doi 10.1088/0031-9120/8/1/002.
- F. C. Blake and B. H. Jackson, "The Relative Intensity of the Harmonics of a Lecher System (Experimental)". The Ohio Journal of Science. *PDF)
- F. C. Blake, "The Relative Intensity of the Harmonics of a Lecher System (Theoretical)". Physical Lab, Ohio State University. (PDF)
