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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

2 elements short boom yagi for 80 meters

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.

Complete plans and drawings to build a small 3 elements Yagi antenna for six meter band by Ken Willis

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

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)

DJ9BV yagi antenna for 2 meters band

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

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

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.

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

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.

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

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 portable 2 elements tri band yagi

A 3 element yagi beam for 40 meters band

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.

5 elements "vee" log-yagi for 10m band- boom lenght : 4mt. Gain : over 10 dBd , f/b =over 40 db (deep null) f/b= min 20dB for different polarization signals

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.

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

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

An option for restricted and limited space, to operate the six meters band with an indoor three elements yagi antenna by Brian Williams

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

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.

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

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

Interesting variant on the 3-element Yagi. Lightweight fiberglass (or similar) tubes supporting a wire structure of elements

This Yagi has a constant element-distance of 1,50 m. You must only correct the lengths of the elements for QSY, see table down. For the bands 10 m and 12 m the Yagi is working as a reflector-radiator-Yagi, for 15 m and 17 m as a beam with radiator and director.

A 7 elements yagi beam monoband antenna for 14 Mhz by VE3GK

A wire yagi antenna model, easy to build, made using inverted vee elements and requiring just one support by ve3vn

Schematic Manual of the 3 element Yagi antenna by ECO antenne

How to improve the gain of your 5 element Tonna yagi for 50 MHz by roughly 3 db!

An interesting article on building a 4 elements yagi antenna with gamma match for the 2 meter band. This article include two videos demonstrating assembling procedure by KG0ZZ

Two Versions of 5 elements stacked 25 Ohm Yagis with 1,80 m and 2,00 m Boom

A portable 4 elements yagi antenna for 70 MHz by yu7ef

Add two parasitic elements to the sleeve dipole of a Netgear Router

A 3 element yagi antenna project for the 144 MHz band by PY5ALZ in portuguese

On this page is the design for Dual Band 2M / 70cm antenna with 3.2mm elements. The antenna has a 50 ohm designed driver. This Yagi has a unique element called a Open Sleeve

EF155A1 21 MHz monobander antenna by YU7EF

Original drawing and design of a 4 and 7 elements yagi antenna for 50 Mhz

Collection of different techniques to homebrew PVC yagi antennas, including elements assembling, baluns and chokes, radiator box tips and tricks by dk7zb