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DX dual dipoles by nb6z for 20 and 15 meters

A homemade antenna plan for a portable yagi beam antenna for the Six meters. Consist of a 3 elements yagi beam design include antenna dimensions, with elements lenght and spacing.

UHF 3 element portable antenna with gamma match by ON6MU

For amateur radio operators seeking a compact, directional antenna for the 10-meter band, this resource details the construction of a Moxon Yagi beam. The design utilizes readily available PVC pipe for the boom and elements, with specific measurements derived from the Moxon Rectangle Generator software. It outlines the assembly process for the main boom and end sections, providing critical dimensions for element spacing and overall length to achieve resonance at 28 MHz. The Moxon configuration offers a smaller footprint compared to a traditional Yagi, making it suitable for limited space installations. The article provides practical guidance for hams interested in a DIY antenna project, emphasizing the use of common hardware store materials. It specifies a 1 1/4" PVC schedule 40 pipe for the main boom and details the use of tees, reducing bushings, and 45-degree elbows for the element ends. Key measurements like the 55" spacing for the ends and the 150 3/4" overall length are provided, enabling replication of the design. The Moxon's inherent wide beamwidth and good front-to-back ratio make it an effective choice for DXing on 10 meters.

Crossed yagi for 437 MHz Satellite antenna, with power divider splitter build.

17 Meter 3 element TA33 junior mono band yagi antenna conversion project by K6TC

The **NW3Z** optimized wideband antenna designs, originally presented at Dayton 2001, detail Yagi configurations for the 20-meter, 15-meter, and 10-meter amateur radio bands. This resource provides access to the design files, likely containing critical parameters such as element spacing, element lengths, and boom dimensions, which are essential for replicating these directional antennas. The designs focus on achieving wide bandwidth, a desirable characteristic for contesters and DXers operating across a significant portion of each band. The content specifically references "nw3z-Antenna-DesignsDownload," indicating that the core information is available as a downloadable file, presumably in a format suitable for antenna modeling software or direct construction. Such files typically include **NEC models** or similar data, allowing for performance analysis and optimization before physical construction. The emphasis on "optimized wideband" suggests design considerations for SWR bandwidth and gain characteristics over a broader frequency range than typical narrow-band Yagis. The resource serves as a direct source for specific, proven antenna designs from a known amateur radio antenna designer, offering practical data for hams interested in building high-performance Yagi arrays for HF.

Basics and principles of the HB9CV antenna by Rudolf Baumgartner. This antenna join electric advantages of the two elements direct feeded aerials with the mechanical advantages of the Yagi antennas, in French.

10-12-15-17 meter band yagi antenna

2 element Yagi antanna plan from G3SYC

A simple multi-band magnetic loop antenna designed for 20, 30 and 40 metres, made from 16 feet of RG58 coax cable. The performance is impressive for its size but not meant to replace a Yagi. The antenna features a tuning head, matching unit, tuning capacitors, band change switch, and matching transformer. The feedpoint is at the bottom of the loop. The document provides detailed instructions on assembly and operation.

The ARRL ANTENNA Vol 5 COMPENDIUM features an article detailing two portable 6-meter antennas: a 2-element quad and a 3-element Yagi with telescoping elements. The 2-element quad exhibits a measured gain of **4.2 dB** over a dipole, while the 3-element Yagi achieves **5.8 dB** over a dipole. Both designs prioritize ease of construction and rapid assembly/disassembly for portable operations. Specific dimensions are provided for a 3-element 6-meter quad using #14 bare copper wire. The reflector element diameter is 6.2958 meters, the driven element 6.125 meters, and the director 5.8547 meters. Element spacing is 0.9398 meters between reflector and driven, and 1.1684 meters between driven and director. The SWR is under _1.26:1_ from 50 to 50.4 MHz, with a feed point impedance of 48.75 -j0.13 Ohms at 50.2 MHz, suitable for direct 50 Ohm coax feeding with a current _balun_.

The QM7 antenna is a simple 7 elements Yagi with 3.70 m boom length for the lower 144 MHz SSB/MGM band, used it mainly for Sporadic-E and MS contacts. It exhibits a forward gain of 11.35 dBd; i.e. 13.5 dB forward gain over the isotropic radiator, while the F/R is about 12.5 dB

A homebrew project for a 2 meter 4 element yagi beam antenna by 2E0HTS

Various Yagi antennas for 70 Mhz band

A 3 and 5 element portable yagi antennas for 2 meter band

An excellent all-around 40 meter antenna for those who don't have room for a multi element yagi antenna

A Bencher antenna divsion, manufacturer of HF YAGI and Vertical antennas

The BV6 50 MHz Yagis resource details the construction of two distinct Yagi antenna designs for the 6-meter band, specifically a 1-wavelength (1wl) model and a 2.1-wavelength (2.1wl) model. The 1wl Yagi, with a boom length of 5.850m, achieves a gain of **9.4 dBd**, while the 2.1wl Yagi, spanning 12.90m, boasts a gain of **11.9 dBd**. These designs adhere to a proven methodology for optimizing current slope and maintaining constant phase delay across parasitic elements, ensuring high gain per boom length and an _excellent pattern_. Both designs target a 50-ohm input impedance, facilitating straightforward feeding with a robust folded dipole. Final verification using NEC-II software confirmed the antennas' exceptional stacking capabilities, yielding stacking gains exceeding **5.8 dB** for a 2x2 array with minimal mutual detuning. The resource provides common mechanical data, including boom and element diameters, and specifies element lengths corrected for boom diameter. While the original _DUBUS Technik V_ publication contained incorrect element lengths, this resource provides the accurate dimensions for proper construction, emphasizing the use of readily available materials for cost-effective amateur radio deployment.

Design and optimize Yagi antennas. Ol GW Basic program for dos.

Simple gain antennas for the beginner, a 2 element HF yagi antenna

Calculate your dipole, 3 element yagi and a simple dipole

VE7CA reprint an interesting article taken from arrl antenna compendium. Two elegant practical and portable 6-meter gain antennas, a two-element quad and a tree-element Yagi antenna for 50 Mhz-6 meter band

This resource presents a detailed analysis of the W6NL 2-element 40-meter **Moxon Yagi** antenna, covering its design, construction, and measured performance characteristics. It outlines key specifications such as a free-space gain of 6 dBi, 11 dBi at 70 feet, and a direct 50-ohm feed. The document highlights the antenna's physical attributes, including 52-foot elements, a 27-foot boom, and a weight of 75 pounds, engineered to withstand 125 mph winds. Modeling was performed using **AO6** and K6STI software, with a focus on the unique functions of the transverse tip elements for Moxon coupling, physical balance, efficient capacitive loading, and reduced wind load. The presentation includes comparative data, showing the Moxon's superior front-to-back (F/B) ratio and wider bandwidth compared to traditional loaded Yagis. Performance graphs illustrate the SWR, gain, and F/B across the entire 40-meter band (7.0-7.3 MHz), comparing measured results against calculated values. Azimuth and elevation patterns demonstrate high F/B, with the antenna's pattern matching that of a full-size 3-element Yagi on a 30-foot boom. It also notes a gain difference of 1.5 dB down relative to a K3LR 4-element Yagi on a 50-foot boom, providing practical benchmarks for performance evaluation.

A 40-meter reversible _Moxon rectangle_ antenna project details its construction and performance, featuring 51-foot long sides and 7.7-foot turned-in sections. The design incorporates a 16.5-foot boom, with elements spaced 1.1 feet apart, constructed from #14 covered wire. It utilizes two double-pole relays for switching between NE and SW directions, achieving F/B ratios up to 40 dB on CW and 30 dB on SSB, with distinct reflector stub settings for each mode. This antenna replaced a full-size 2-element Yagi, demonstrating comparable forward gain while offering superior F/B ratios and directional flexibility. _EZNEC_ modeling indicates only 0.2 dB less forward gain than the Yagi. The system uses no baluns, relying on half-wave feedlines and switched stubs for impedance matching. The antenna is tree-supported at 45 feet, with its effective radiation height modeled at 80 feet due to local terrain, enhancing its performance over a nearby lake.

8 and 4 elemets yagi beam antenna by N6CA

A 5 elements yagi antenna for 10 meters band project, plane and picture of the EF105A by YU7EF

A freeware dos antenna design program, dedicated to yagi antenna design by K4VX

One of the most important considerations when designing and building a Yagi antenna is the method used to attach the elements to a boom. This is true because the boom influences the electrical length of the elements. In this article JH Reisert explain with drawings techniques on mounting yagi antenna elements to a boom

Designing quagi and yagi antennas on 2 Meters, some preliminary notes by Cebik, W4RNL

Includes EH antennas, 7Mhz vertical monopoles, 5 elements vee log-yagi for 10m and more

A 14 elemets yagi antenna for 432 MHz based on DK7ZB design

Yagis for 20 15 10 meters band by Nathan A. Miller

A standard 6 elements design scaled for UHF application. All material used in this project are easily obtainable tubes and rods which is limited within a total budget of $18.

The EF0604S is a compact 4 elements yagi antenna plan for six meters band featuring 8.77 dBi gain and a front back gain of 17.89 dB. Article includes elements dimensions and spacing, along to pictures of some homebrewed examples.

Designing a compact directional antenna for the 70cm band involves balancing gain, front-to-back ratio, and physical size. This resource details the construction of a 2-element Moxon rectangle antenna for 432 MHz, outlining the specific dimensions for the driven element and reflector, and discussing the advantages of its folded dipole configuration. The article provides insights into the historical context of 70cm operations and the author's personal experiences with early 432 MHz transceivers and antenna setups, such as a Jaybeam 48-element TV antenna. It also touches upon the practical aspects of building and deploying such an antenna for local and weak-signal work. The Moxon antenna design is compared to a 3-element Yagi, noting its superior front-to-back ratio and broader bandwidth for a given boom length, making it suitable for portable operations or restricted spaces. The construction uses readily available materials like copper wire and PVC tubing, emphasizing simplicity and ease of replication. Performance characteristics, including a reported gain of approximately 5.5 dBi and a front-to-back ratio of 20 dB, are discussed in the context of its compact footprint. The resource includes a visual representation of the antenna's dimensions and construction, aiding in practical implementation.

Elelement yagi beam antenna for 2 meters band by ON6MU

About Stacking yagi antennas by OH1ZAA

One of the best antenna values on the market is the LightningBolt Quad. At about half the cost of a tri-band yagi, you get five band coverage with a single coax feedline and excellent performance from a light, low wind load antenna.

Online javascript antenna calculator designed to give the critical information of a particular beam antenna, in this case a seven element Yagi, for the frequency chosen.

Operating on the 12-meter and 17-meter WARC bands often benefits from directional antennas that offer gain and front-to-back ratio in a compact footprint. This resource details the construction of a dual-band wire beam, specifically a _Moxon Rectangle_ design, for these two bands. It outlines the use of fiberglass tubing for spreaders, _Flexweave_ wire for the elements, and an aluminum hub with die-cast flanges to create a robust structure. The design allows for a single 50-ohm feed point, simplifying station setup and minimizing feedline loss. The project provides specific dimensions and material choices, enabling a homebrewer to replicate the antenna. While inspired by L.B. Cebik's (W4RNL) theoretical work, this implementation focuses on practical construction techniques for a physical build. The resulting antenna offers directional characteristics suitable for DXing and contesting on 12m and 17m, providing an alternative to full-sized Yagis or compromise verticals, particularly for those with limited space.

A simple to build Yagi 2 element antenna for 15 or 20 meters band by 9m2mso

EF403 is a 3 element yagi antenna for the 40 meters band with high gain and F/B Ratio

An homebrew project for a 3 elements yagi monoband antenna for the 20 meters by 9M2MSO

A suitable high gain 70cms antenna for SOTA operation was sought that did not have the drawbacks of a long Yagi antenna, principally a narrow beamwidth and bandwidth.

This technical note explores the application of **Moxon rectangle** antennas for WARC bands, specifically 17 and 12 meters, as compact directional alternatives to standard Yagis. It details three design approaches: a dual-band Moxon using open-sleeve coupling, a Moxon-Yagi combination, and a simplified 1.5 Moxon rectangle. The document provides specific dimensions in feet for aluminum tubing elements (0.75" and 0.5" diameter) for each configuration, along with projected free-space gain, front-to-back ratio, and feedpoint impedance (R+/-jX Ohms) across the respective band segments. Performance tables illustrate gain (dBi), front-to-back ratio (dB), and 50-Ohm VSWR for each design. The dual-band Moxon, despite its compact 7-foot boom, is not recommended due to extreme sensitivity to construction variations, leading to rapidly changing performance characteristics. The Moxon-Yagi combination, featuring a 17-meter Moxon and a 12-meter director-driver Yagi, is presented as a more practical and adjustable solution, offering stable performance with a 10-foot boom. NEC model descriptions are included for simulation in programs like EZNEC, NEC-Win Plus, AO, or NEC4WIN.

ON6MU Optimized 10 and 6 and 4 element UHF Yagi Antenna

The N0KHQ Coax Square antenna, designed for 17 meters and built using RG-58 coaxial cable, presents an intriguing option for hams with limited space. L. B. Cebik, _W4RNL_, meticulously models and analyzes this array, clarifying its classification not as a modified Moxon, but as a distinct member of the "dual-coupled, 2-element, parasitic array" family. The design leverages the velocity factor of RG-58 (approximately 0.66-0.67) to achieve significantly shorter element lengths compared to full-size counterparts, resulting in a perimeter of 42 feet for the N0KHQ array versus 54 feet for a standard Moxon. _NEC_ modeling reveals the coax square's performance characteristics, including a forward gain of 5.6 dBi and a 23.7 dB front-to-back ratio on 18.118 MHz. While slightly less gain than a Moxon (6.0 dBi), its pattern exhibits Yagi-like nulls at 90 degrees, distinguishing it from the Moxon's wider beamwidth. The article also delves into the unique feedpoint considerations, explaining how the split braid and center conductor of the RG-58 driver effectively form a folded dipole, allowing for impedance transformation to achieve a good match for 50-Ohm cable. Despite its shortened elements, which inherently narrow the operating bandwidth, the coax square maintains satisfactory performance across the 17-meter band. The analysis emphasizes that while SWR curves are important, a holistic view of gain and pattern degradation across the band is crucial. This antenna is a viable solution for operators needing a compact, directional array, particularly for narrow bands like 17, 30, or 12 meters, where its high-Q performance is most effective.

ON6MU optimized 6/9 element vhf yagui antenna with antenna schematic plan and pictures of homebrewed samples.

A 144 MHz six element yagi beam antenna plan