Log-periodic antenna
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In telecommunication, a log-periodic antenna (LP, also known as a log-periodic array or log periodic beam antenna/aerial) is a broadband, multi-element, directional, narrow-beam antenna that has impedance and radiation characteristics that are regularly repetitive as a logarithmic function of the excitation frequency. The individual components are often dipoles, as in a log-periodic dipole array (LPDA). Log-periodic antennas are designed to be self-similar and are thus also fractal antenna arrays. The log periodic antenna was invented by Dwight E. Isbell, Raymond DuHamel and variants by Paul Mayes. The University of Illinois at Urbana-Champaign had patented the Isbell and Mayes-Carrel antennas and licensed the design as a package exclusively to JFD electronics in New York. Lawsuits regarding the antenna patent which the UI Foundation lost, evolved into the Blonder-Tongue Doctrine [1]. This precedent governs patent litigation. [2]
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| Blonder-Tongue Doctrine Blonder-Tongue Doctrine definitions.uslegal.com/b/blonder-tongue-doctrine/ - Web |
| LPDA Online Calculation LPDA Online Calculation www.changpuak.ch/electronics/lpda.php - Web |
| Some thoughts on Log-Periodic Antennas Some thoughts on Log-Periodic Antennas www.members.westnet.com.au/impeh/log%20periodic_A.htm - Web |
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