Search results

Experiments on HF antennas for restricted spaces. In this article author experiments antennas for 80-10 meters band having just a very small garden and several restrictions. Basic antennas consists of laded multiband dipoles and fan dipole antennas

Modeling an 80/40/20M Fan Dipole for DX by Larry Banks, W1DYJ

7 Band OCF Antenna project by W0HC

An homemade fan dipole antenna for 20 30 40 meter bands, setup in a 15 meter wide garden. The longest leg for 40 meter is folded to fit in the 7.5 m

A wire dipole antenna for 80 meters band

A page in french dedicated to the double bazooka antenna, with a short history of this antenna model and main characteristics including a comparison versus the dipole antenna and formulas to determine elements size.

The N3UJJ multi band cage dipole antenna project thay can fit a small property

This calculator is designed to give the horizontal length of a particular dipole including Tees, antenna, or one side of it, for the frequency chosen. Enter the desired frequency and select the desired calculation from the drop box

Ham Radio & NOAA Apt Weather Satellite blog. All weather satellite NOAA APT images are decoded with homebrew receiver. Setup using homebrew Turnstile Cross Dipole antenna, P-3 500MHZ PC with WIN-XP & WXTOIMG program.

This antenna is intended for the 20-meter Band. There are two Voltage Fed Helical Dipoles, made with 2 slinky that fed with phase shift in 90 degree

Homemade Loaded Coil Dipole ( w8010 diamond ) for 10, 15, 20, 40 and 80 meter

Presentation by AC8GY on classic G5RV Antennas and other horizontal dipoles, the popular G5RV, ZS6BKW, dipole fan, Alpha-Delta DX-CC and a trap dipole are modeled in EZNEC and compared.

Design and build an 6 m dipole antenna from aluminum, tubing, that resembles the active element of a yagi beam antenna.

A lightweight portable vertical antenna for 40m

A home made dipole antenna for 10m, 6m, 4m bands made with two sections of 450 and 300 Ohm ladder lines, cut to achieve acceptable SWRs on all bands

Ever need a way to estimate the amount of wire to add to or remove from a center-fed wire dipole antenna to achieve resonance at a desired frequency? This article help to determine correct wire lenght.

A three band short Vee antenna is feasible with two legs per side on a dipole. 10-15-20 meters by W8HDU

Only 2x 10ft wide, performance similar to full-size dipole, covers whole band with SWR better than 1:1.2.

Homebrew project of a windom antenna, an off center fed dipole, resonating from 10 to 80 meters

A Co-ax Trap Dipole For 40, 30 and 20 Meters or at last that was the intention

The Double Bazooka Dipole is a very efficient single band antenna which is very quite,and does not require the use of a balun. This antenna consists of coax (RG58) with the shield split at the center and the feedline attached to the open ends.

A dipole antenna for 7 MHz support for this antenna is fiberglass military mast

A comparison of multiband dipoles, including jumpered dipole versus fan dipole antennas, dipole fed by ladder line, resonant dipoles antennas. ARRL lab notes

A simple to build full length 20/40 dipole antenna to be used in inverted vee configuration

A conversion of a 80m dipole into a 160m vertical antenna

C-Poles for 20m and 6m, it is a folded half-wave dipole with an asymmetrical tapped 50-Ohm-point in the lower part of the antenna. Design hints by DK7ZB

A small sized and very cheap antenna project that allow you to work on WARC bands with a total gain very close to the dipole in both bands. On 12 meters is a normal dipole, while on 17 is a trapped dipole. Article in Italian

Use this online calculator to determine the length of a dipole antenna from the frequency. Both metric and English units of measurement are supported.

A multiband coax trapped dipole for 10-80 meters bands by DF1PU

Project with pictures and plans for an HF off center fed dipole by KB1NWH

A eham article on a square copper dipole antenna for 50 MHz by K0FF

The HF horizontal loop has been around for many years now. This article includes a YouTube video and discusses the reasons for looking at this antenna, its design, and its installation. There are some on-air comparisons against three regular double bazooka (coax) dipoles and the Par SWL End-Fed antenna.

A shortened multiband dipole antenna by PA0FRI in Dutch

The antenna consists of 6 runs of stranded wires spaced by plastic Hula Hoop spacers made of poly tubing

This web article by VK3BLG details the construction of an experimental 70cm (432 MHz) circularly polarized patch antenna, intended for satellite communication. The resource provides dimensions, feed point specifications, and impedance matching considerations for a single patch element, with discussion extending to array configurations for circular polarization. Construction involves a copper patch element on a dielectric substrate, fed via a coaxial cable. The design is based on information derived from AO-40 satellite antenna specifications, focusing on achieving circular polarization for satellite reception. The article includes specific dimensions for the patch and feed points, along with impedance values. Validation is implied through on-air satellite reception reports, with initial signal reports of **1 S-point above noise** for AO-40 beacons using a grid reflector, improving to **3-4 S-points above noise** with a 2-turn helical feed. The author references a _NanoVNA_ for impedance measurements and discusses the relationship between slot and dipole antennas in the context of patch design. DXZone Focus: Web Article | 70cm Patch Antenna | On-Air Satellite Reception | Circular Polarization

A 2 meter dipole antenna by KV5R

Limiting static surges on dipoles, verticals or end fed antennas

Dipole, inverted V, full wave loop and grond plane antenna quick reference plans

A post about the construction and measurements of a Resonant Feedline Dipole cut for the 10M band

This document describe serveral wire antennas, from the folded dipole, to the common halfwave monoband antenna for those who want to make HF portable operations in holiday.

How to homemade a multi-band HF dipole using 100 meter of speaker wire, 2 strandsm including a homebrew 1:1 choke balun

A multi band portable link dipole antenna for 20 30 and 40 meters band

Photo construction manual of a portable antenna made with two heavy duty whips by buddipole. In this article has been implemented a 50 MHz portable dipole.

Electrically shortened dipole antennas, article by Mark Connelly, WA1ION

Find out how much to adjust the length of a quarter wave whip or a half wave dipole rather than the outright cut-and-try method.

All about dipole antenna construction

The AB2RA bowtie 80 meter antenna includes also a 40 meter dipole

Spipral antenna principle by a concept of Bill Petlowany, K6NO. Tak Antennas are based on this principle, using spirals as dipole linear wires.

An antenna for shortwave radio broadcasting consisting of rows and columns of dipoles, is a high gain directional antenna, designed for medium and long range communications.

This is another alternative home-brew center connector for a dipole. The parts used are common PVC accesories found at the home supply store.