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Query: w4rnl
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Experimental omni-directional antennas for 6-meters band
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We often think of the Moxon rectangle as strictly an HF antenna. However, its small size and special far field pattern lend themselves to some VHF applications. So let's see how to adapt the design to 2 meters (as a popular band choice) and also see a few of the uses to which we may effectively put the design.
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Moxon antenna for 50 MHz, The Moxon rectangle is a quite broad-band antenna, but it is not quite broad enough to cover the entire band.
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10 meters band aluminum 2-Element Moxon rectangle
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Antenna modelling techniques and examples by W4RNL
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Interesting article on mobile antennas by Cebik. . The article offers advice for setting up and operating mobile antennas for ham radio use. It emphasizes the lossy nature of mobile-in-motion antennas but encourages users to rise to the challenge. Steps include safeguarding car electronics, choosing proper cabling, and carefully selecting and mounting antennas. It highlights potential issues like roof mounting, trunk lip grounding, and side-mounting for trucks. For stationary operation, options like dipoles or beams are explored, with safety tips for masts and guying systems. Lastly, it stresses safety, suggesting stopping the vehicle to operate whenever possible
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Notes on building a basic wire vertical or horizontal antenna for 160 meters band by L. B. Cebik, W4RNL
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Fold, bend, and mutilate or kaking a dipole fit the space available
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The varieties of twinlead J-Poles and some performance standards, L. B. Cebik, W4RNL
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Designing quagi and yagi antennas on 2 Meters, some preliminary notes by Cebik, W4RNL
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An interesting article on traps, pros and cons of trapping by W4RNL
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The Dual-Band Wire Beam was inspired by L.B. Cebik's (W4RNL) article The Elusive Moxon Nest. Fiberglass tubing spreaders, Flexweave elements, an aluminum hub, and two die-cast aluminum flanges combine to provide a 12/17m Moxon nest with one 50 ohm feed.
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A potpourri of 160-Meter vertical antennas and modeling issues, inverted-L, 3-element parasitic array, 1/4-wavelength monopole
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N0KHQ Moxon rectangle for 17 meters, constructed from RG-58 coaxial cable
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The Moxon Rectangle is growing in popularity as a compact 2-element array that approaches a full-size 2-element in gain but with a far superior front-to-back ratio and a direct match for the standard 50-Ohm coaxial cable.
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W4RNL tutorial on on inductively coupled (link-coupled) antenna tuners
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A popular 2 meter antenna returns in an improved, easier to reproduce form, 2008 QST article
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Designing moxon rectangles by equation and by model L. B. Cebik, W4RNL
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The page discusses Axial-Mode Helical Antennas, focusing on turning helical antennas over perfect ground and modeling helices in NEC-2 for optimized design. It covers topics such as high-gain performance, broadband, impedance matching, radiation pattern, feedline, balun, near field, far field, and DIY applications.
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Notes on Axial-Mode Helical Antennas in Amateur Service. Helix Basics, Modeling Issues, and Short Helical Antennas Over Perfect Ground
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Calculating the length of a resonant square quad loop
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My Top Five Backyard Multi-Band Wire HF Antennas. A selection of the top 5 HF wire antennas for the backyard and for multi-band operation
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Theory and origins of W4RNL Asymmetrical Hatted Vertical Dipole AHVD for portable operations.
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This LPDA calculator is based on the design procedure as described by L. B. Cebik, W4RNL (SK) in the 21st edition of The ARRL Antenna Handbook.
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Complete collection of the four main parts of this excellet research on modelling and designing half wave dipole antennas for 40 meters band, covering all aspects beginning from full wave length antennas, to shortened, loaded and reshaped dipoles
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Quads beams consist of 2 1 wavelength (approximately) loops, ordinarily arranged so that one is the driven element and the other is the reflector. In this project author explains how to build a two element Quad Antenna for the 28 MHz.
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Method, Units of Measure, and the Dipole Standard of Reference. This article helps in understanding where does beam gain come from in directional aerials like in example Yagi antennas.
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Antenna modeling is an essential technique for both amateur and professional engineers, enabling precise analysis of antenna performance. This guide, published on 4 different QST articles by L. B. Cebik, introduces NEC-2, a widely used public domain software for modeling antennas, focusing on its capabilities and practical applications. The series aims to demystify the modeling process, providing foundational knowledge and techniques for effective antenna design. Key concepts include understanding the method of moments and the importance of segmenting antenna elements. By mastering these principles, users can enhance their comprehension of antenna behavior and optimize their designs for improved performance.