Search results

Design your VHF UHF Yagi antenna online, a JavaScript enhanced web page that implements the design of an antenna for 2m and 70cm bands. This page offers a streamlined experience for Yagi antenna design enthusiasts. It assumes prior knowledge of Yagi design principles, minimizing distractions with a user-friendly interface. Equipped with essential equations, it provides instant design feedback. Red font warnings indicate design limitations, ensuring practical results. Constraints include Gain (11.8-21.6 dBd) and Boom Length (2.2-39 wavelengths), with additional frequency-dependent restrictions noted in input fields.

Build this home made yagi antenna for your 2.4ghz wireless ethernet.

This resource provides comprehensive instructions for constructing a 2 element quad antenna specifically designed for the 10, 12, and 15 meter bands. The antenna features a diamond configuration, which offers improved gain compared to a square configuration. The author shares insights into the materials used, including a square-aluminum boom and bamboo poles, along with construction techniques that ensure durability and optimal performance. This project is ideal for amateur radio enthusiasts looking to create their own antennas at home. In addition to construction details, the author discusses the antenna's performance, noting its effectiveness even at a height of 8 meters. The quad antenna reportedly performs comparably to a 3 element yagi, with excellent SWR readings and strong signal reports from European stations. This project is suitable for beginners and offers a cost-effective solution for those interested in enhancing their amateur radio setup with a homemade antenna.

A simple design of a 9 elem. yagi antenna for 2 meters band

2-Element parasitic Yagis for the Shortwave-Bands 10-12-15-17-20-30m. The antennas are feeded with the DK7ZB-match. A quarter-wave choke of coax is grounded at the socket.

The QM7 antenna is a simple 7 elements Yagi with 3.7 m boom length for the lower 144 MHz SSB/MGM band, in PDF Format

Plans for 3 elements beam antenna and gamma matches

4 Element Cubical Quad, Yagis, LZA Circular Quad, Shrunken Quad , quarter wave, J-Pole, beam mounting , changing polarity

Build a portable VHF yagi antenna for 2 meters. All you need is two rabbit ear antennas from Radio Shack, two CATV baluns, four feet of 3/4 CPVC pipe with one tee.

43 Element Yagi for 144.200 MHz by VE7BQH

All these plans use the DK7ZB match

The **DF9CY Three-Element Antenna for 28 MHz** details the modification of a commercial PAN International CB antenna to optimize its performance for the 10-meter amateur radio band. This resource provides specific design parameters, including a design frequency of 28.300 MHz, a usable bandwidth of 600 kHz, and a return loss better than 20 dB centered at 28.270 MHz. It also specifies a gain exceeding 7.5 dBi and a front/back ratio greater than 20 dB. The feeding mechanism utilizes a **gamma match**, with setup instructions provided for its positioning. Modifications involved shortening each element's end by 40 mm, a straightforward process due to existing screw holes. The author also recommends replacing the original screws with V2A stainless steel hardware to prevent oxidation and upgrading the SO239 connector to an N-connector for improved reliability. EZNEC simulation files are available, showing azimuth and elevation diagrams with good front-to-back ratio and around 10 dB vertical attenuation. The antenna has been in service since October 1998, demonstrating good performance with 90 watts and even 750 watts, facilitating contacts with all continents from a modest 9-meter height.

A JavaScript to calculate the dimensions for a seven element Yagi-Uda Antenna

Wide variety of multi-frequency Yagis, Verticals, and Dipoles as well as other single and multi-frequency configurations to meet specific requirements.

2 elements short boom yagi for 80 meters

The HB9ABX RoomCap antenna document details the construction and performance characteristics of a compact HF antenna design. It presents a series of comparative field tests conducted between July and September 2005, evaluating the HB9ABX antenna against established designs like the Microvert MV-500, Cushcraft R5/R7000 verticals, and a 5-element DJ2UT Yagi beam. Specific test scenarios include mobile installations, rooftop deployments, and comparisons on 20m, 40m, 80m, and 160m bands, with signal reports from various European and DX stations. The resource emphasizes the antenna's small physical footprint and its claimed efficiency across multiple HF bands. Test results consistently show the HB9ABX antenna performing comparably to, and often outperforming, larger reference antennas in terms of received signal strength, with reported differences of 1 to 2 S-points (6-12 dB) in many contacts. Notably, a 20m DX test on July 26, 2005, indicated the 1.3m HB9ABX radiator yielded 2-3 S-points stronger signals than an R7000 vertical for US DX stations. An August 12, 2005, test on 40m highlighted the HB9ABX's superior signal-to-noise ratio in urban QRM, demonstrating 10-18 dB better performance than an R7000. The document includes specific callsigns, signal reports, and QTHs for each comparison, providing empirical data for the antenna's performance claims.

The HB9CV-Beam is a 2-Element-Yagi with two driven elements and was introduced by Rudolf Baumgartner, HB9CV in the 1950ies. This beam antenna is a coax-feeded version of the ZL-Special construction by DK7ZB for 2m, 6m and 10m

Details the construction and optimization of antenna systems for amateur radio satellite operations, focusing on practical, homebrew solutions for VHF/UHF bands. It covers building _groundplane antennas_ from salvaged materials, recycling old beam antennas into new configurations like a 2-meter crossed yagi, and constructing a 10-meter horizontal delta loop. The resource also explains antenna matching techniques, including folded dipole driven elements and quarter-wave transformers, along with the importance of accurate SWR measurements and minimizing coax loss. Demonstrates how to achieve a **1:1 SWR** by carefully trimming elements and adjusting radial angles on groundplane antennas. It provides insights into selecting appropriate coax and connectors, highlighting the benefits of Belden 9913 for low loss and the proper installation of _N-connectors_. The article also addresses RFI mitigation from computer birdies and presents a design for a silent triac antenna control circuit, offering practical solutions for common satellite station challenges.

If you want a top-performance VHF/UHF Long Yagi, you will probably have to build it yourself.

Presents detailed plans and construction notes for a compact 3-element Yagi antenna specifically designed for the 50 MHz band, authored by Ken Willis, _G8VR_. The article, originally published in _Practical Wireless_ in 1989 and updated in 1999, outlines the design philosophy behind a small, gain-oriented antenna suitable for restricted QTHs. It covers element dimensions, boom length, and a unique coaxial _gamma match_ system, emphasizing a "plumber's delight" construction approach using readily available hardware. The resource details the author's operational experience, achieving _DXCC_ on 50 MHz with over 110 countries worked using this antenna. It also incorporates insights from computer simulation studies by _G3SEK_ and _W1XP_ using _MININEC_, which suggested minor adjustments to element lengths and spacing for improved front-to-back ratio, increasing it from 14dB to 31dB. The author compares theoretical performance with practical results, noting that while larger arrays might offer a few dB more gain, this compact design provides excellent performance for F2 propagation and general 6-meter DXing.

Examines the operational differences between **quad** and **Yagi** antenna designs, focusing on their respective performance characteristics for amateur radio applications. The document highlights key metrics such as forward gain, front-to-back ratio, and bandwidth, which are crucial for effective DXing and contesting. It discusses how element configuration, boom length, and material choices impact the efficiency and radiation patterns of each antenna type across various HF bands. Practical considerations for antenna builders are addressed, including structural integrity, wind loading, and overall weight, particularly when using fiberglass spreaders for quads. The resource also covers precipitation static reduction in quads due to their closed-loop design and their ability to operate efficiently at lower elevations compared to Yagis. It provides insights into dual-polarization feed systems for quads, offering independent vertical and horizontal feed points for enhanced operational flexibility.

HF Wire Yagi antenna with notes and eznec file on original article of a Portable 3-Band Yagi antenna for 10-15-20 meter band made with wire elements. Include link the original to QST article.

A wire yagi antenna for 20 and 40 meters band suitable for outdoor and field day operations

3 elements VHF Yagi homebrew antenna designed with YAGIMAX 3. Maximum forward GAIN is about 8,17 DBi. This antenna offering an effective radiation power 4 times greater of the transceiver output by SV1BSX

G3PTO antenna drawing plan for a 50MHz 6 Element Yagi beam

Pictures and plans of a 4 elements yagi beam antenna for 14 Mhz

A 3 elements long yagi antenna for 6 meters band by ON6MU

A 3 Element Mono-band Yagi for 20 meters by Kees Wiegers, PA5CW (ex-PA3BHS)

U6YRN 6 element yagi antenna for 430-450 Mhz

The PringlesCantenna is an ultracheap Yagi-type directional antenna that can be built for under $10. The original Pringles Yagi was designed by Andrew Clap.

DJ9BV yagi antenna for 2 meters band

Quad, Yagi for low bands. Specialist in antennas, supports and moving of medium-large sized radio antennas, professional rotators, masts, towers, and accessories.

Based on a design by JM1SZY for 50 MHz that he developed using YO

5 Elem. yagi for 10 meters, 9 element yagi beam antenna for six meters band by ON4ANT

Presents a detailed construction guide for a 2-element _Moxon rectangle_ antenna optimized for the 10-meter band, designed by L. B. Cebik, W4RNL (SK). This resource demonstrates how to build a compact beam antenna using readily available hardware store aluminum tubing, fitting within a 12-13 foot width. It highlights the antenna's performance characteristics, including a gain comparable to a 2-element Yagi (11+ dBi) and a front-to-back ratio exceeding 20 dB between 28.3 and 28.5 MHz, with an SWR below 2:1 across the entire band. The design emphasizes direct 50-ohm coax connection without a separate matching system, though a 1:1 choke _balun_ is recommended. The guide provides practical advice on element construction, corner fabrication using L-stock or radius-bent tubing, and the critical side-to-side length adjustment for SWR optimization. It details the feedpoint assembly using a chassis-mounting coax connector and discusses element-to-boom plate options, including spar varnished plywood or LE plastic. The author's experience with a test model on a 20-foot mast confirms stable feedpoint characteristics and excellent performance even at lower heights. The document also includes insights into the antenna's free-space azimuth patterns, noting a broad forward lobe and significant front-to-back rejection. It contrasts the Moxon with traditional Yagis, positioning it as an effective, home-buildable alternative for compact sites or _Field Day_ operations, particularly beneficial during periods of increased 10-meter activity.

A project by G3SYC of a log periodic antenna for 6 meters band

A Portable 2 element Triband Yagi antenna that can work on 10 15 20 meter band by VE7CA

A helically wound two element 40 meter yagi beam antenna from a 1974 QST article

A 6 elements VHF Yagi antenna designed with YAGIMAX 3 and made by SV1XY with excellent results on local and satellites contacts like UO-14 and AO-27

Hammock 2 element wire Yagi antenna for 3 bands 20-15-10 based on VE7CA project

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.

A 40 meter band two elements yagi beam with a 6mt boom with pictures and drawings

2-Element parasitic Yagis for the Shortwave-Bands 10m-30m

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.

2 element Yagi antanna plan from G3SYC

OZ2OE Technical pages, a 3 element 28 MHz light weight Yagi for 10 meters band