gain

276 links - and 3 categories

Short DL6WU yagi for 23cm - 1260 MHz yagi antenna for ATV with a total Bandwidth (3 dB) 1240-1280 MHz and 10 dBd gain
[ Hits: 138 | Votes: 1 | Rating: 4 ]

YU7EF 6 element 2m Yagi - YU7EF EF0206 2m Band 6 Element Yagi Antenna project, provides 11.8 dbi gain
[ Hits: 229 | Votes: 2 | Rating: 8.5 ]
VHF Bi-Square Beam Antenna - 2 Wavelength ,2 Meter Bi-Square Beam , 5dbd gain. This antennas are very cheeap to build and their radiation pattern is similar to a figure 8 with maximum signal through the loop but they may be used as a near-omnidirectional antenna
[ Hits: 188 | Votes: 2 | Rating: 9 ]

A comparison of 40 meter beam antennas - This page describes a comparison study on seven different beam antennas for 40 meters band. Yagi antennas, moxon antennas, mini horse all antennas are described with schema diagram , azimuth plot and SWR F/B Gain diagram
[ Hits: 267 | Votes: 0 | Rating: 0 ]

A Loft-Yagi for Six Metres - This design makes the most of having to put an aerial in the attic. This inverted-vee yagi is giving good results at GW0GHF. Directive gain is about 6 dBd. The front-to-back ratio is not brilliant, about 20 dBd.
[ Hits: 138 | Votes: 1 | Rating: 5 ]

Coaxial Collinear Antenna for 70 CM Band - This coaxial collinear antenna was built to test for my own consumption whether or not this antenna method actually works. the guiding principle is that we have multiple 1/4 wave elements fed in series , the radiation from each adds in phase to produce a large vertically polarised omni-directional antenna with substantial gain
[ Hits: 575 | Votes: 3 | Rating: 6.33 ]

Exploring The J-Pole Antenna - The J-Pole antenna is a common omnidirectional antenna used in amateur radio, particularly on the VHF and UHF bands. This article is an attempt to explore how the J-pole antenna transforms feed-line impedance to free-space impedance, all the while providing gain found only in the more expensive commercial products.
[ Hits: 143 | Votes: 0 | Rating: 0 ]
Improving Gain of the Super J-Pole Antenna - The collinear J-Pole, often known as the Super-J, does improve the behavior over a regular J-Pole. there is an advantage when vertically combining 1/2 radiating sections to have a bit of separation between the half-wave end points. Get 0.8 dB more gain out of the trusty Super-J by replacing the traditional phasing stub with a long coil.
[ Hits: 192 | Votes: 0 | Rating: 0 ]
J-Pole and Expanded Super J-Pole - The standard J-Pole antenna is a end fed 1/2 wavelength antenna, in this article is explained also how to build an expanded Super J Pole that provides about 4.5 dbd gain. These antennas can be built from EMT electric conduit pipe
[ Hits: 315 | Votes: 4 | Rating: 5.5 ]

Magnetic Loop HF antenna - An homebrew HF Magnetic loop made with 2m length of 6mm diameter copper pipe formed into a near circle as the low loss inductor, a short length of coax as a capacitor,a short length of mains cable, again as a fixed tuned capacitor, a tunable 365pF air spaced capacitor, and a small Jackson C804 airspaced variable with a small 3-35pF trimmer in parallel
[ Hits: 131 | Votes: 0 | Rating: 0 ]

The Yagi Antenna - Presentation - A presentation of the Yagi Antennas, and other interesting tid-bits by Brian Mileshosky. This document explains basic concepts of Yagi-Uda antenna theory, influence of reflector and directors on global antenna gain and directivity of radio waves. A simple tape measure antenna project is also included.
[ Hits: 543 | Votes: 2 | Rating: 7 ]

VHF-UHF Long Boom Very High Performance Antenna Designs - Experimental Long Boom Antennas - CP, LPDA, multiband with several NEC Files for 50MHz 144MHz 222 MHz 432MHz but also 902MHz and 1296 MHz Antenna projects. Includes also for each antenna model, in a general comparison table each antenna characteristics including Directive Gain, G/T, E-F/R, H-F/R abd Boom Length. This is a great value comparison table of several commercial and home made VHF UHF antenna projects.
[ Hits: 190 | Votes: 1 | Rating: 10 ]

Homebrew 5/8 Wave HF Vertical Antennas - The advantage of 5/8 wave antenna is that it has the lowest angle of radiation and has about 1dB more gain when compared to 1/4 and 1/2 verticals. So the 5/8 should be the favourite choice for DX.
[ Hits: 714 | Votes: 2 | Rating: 8 ]

Lazy H Array Antenna for 40 meter - Make them simple then Make them work. The LAZY H antenna is a general type of antenna that is in the curtain array family. By placing two 1 wavelength dipoles in a plane that is at right angles to the direction of maximum radiation and keeping the proper in-phase current condition to each element, you can achieve a high gain bi-directional antenna.
[ Hits: 284 | Votes: 3 | Rating: 5.33 ]

How to stack dissimilar yagi antennas - In this article the author provides some guidelines on how to solve a common problem when stacking different types of yagi antennas on the same mast, limiting the effects on gain and radiation pattern of both antennas
[ Hits: 727 | Votes: 2 | Rating: 5.5 ]

A35JP Tonga - I will QRV again from Tongatapu Island (OC-049) as A35JP from 24th November 2019 to November 2020. This time, I will be stationed there as a resident supervisor of the international coorporation project. From 24th November 2019 to November 2020 160m-6m. CW, SSB, FT8
[ Hits: 282 | Votes: 0 | Rating: 0 ]

High Altitude Ballooning, From The Ground Up (and back again) - High Altitude Ballooning makes for a challenging project that sometimes turns into an engrossing hobby. Whilst it is not rocket science it does encompass a wide range of fields (sometimes literally) and there is a lot to learn before you send your first flight up into the sky.
[ Hits: 136 | Votes: 1 | Rating: 10 ]

HyGain TH3JR Improvements - An analysis and performance improvement of the HyGain TH3JR on the 20 meters band.
[ Hits: 159 | Votes: 0 | Rating: 0 ]
Hy-Gain TH3jr Beam Manual online - Hy-Gain TH3jr Tri-band HF 3 Element Beam Covers 10, 15 and 20 Meters assembly instruction manual
[ Hits: 180 | Votes: 2 | Rating: 5 ]
TH-3JRS Deconstruction - Analyzing and deconstructing the Hy-Gain TH3JRS for maintenance task.
[ Hits: 86 | Votes: 0 | Rating: 0 ]