low band antenna

140 links

Trapped Dipole for 12 and 17 Meters - 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 Italia
[ Hits: 887 | Votes: 1 | Rating: 1 ]

Delta Loop DX Antenna for 40 meters band - A monoband delta loop antenna for the 7 MHz. This vertically polarized DX Antenna is a full wavelength sngle side antenna and has a total length of 42.3 meters (137,1 inch) Can be easily setup with a flag pole or fishing pole as center top mast. For optimal performance lower side should be at 2 meter above the ground. This antenna offers a low radiation angle and 1 DB Gain.
[ Hits: 433 | Votes: 3 | Rating: 6.33 ]

Vertical Dipole Array - A simple and awesome wire monoband antenna, very usefull for portable and dxpeditions usage, consist of two elements, a driver and the reflector. This endfed halfwave gives a very low take off angle and is very suited for chasing DX.
[ Hits: 1256 | Votes: 2 | Rating: 6.5 ]

Shortened EFHW Antenna 80-10m ^updated - A shortened multiband antenna, about 23m long, for 80m - 10m bands with a low SWR (<1.3) on 80m and 40m, and <3 till 10m. Bandwith on 80m is 300kHz
[ Hits: 4133 | Votes: 11 | Rating: 6.18 ]

15m Four Square antenna - A 21 MHz Four Square Beam Antenna This popular antenna for the lower bands, can also work well on 15 meters, QST Article
[ Hits: 1358 | Votes: 0 | Rating: 0 ]

6 m JPole Antenna - Based on original G2BCX design this J-Pole antenna for the six meter band is made with a homemade ribbon cable. The antenna shown in this article includes a coaxial cable choke feed to remove RF currents from flowing on the outer of the cable.
[ Hits: 1767 | Votes: 6 | Rating: 6 ]
Tri-Band J-Pole - This strange looking antenna is a combination of Coupled-Resonator principle by K9AY and a quarter stubs to achieve low angle radiation pattern. Designed with 4nec2 NEC based antenna modeler and optimizer for 145/220/440MHz bands
[ Hits: 1922 | Votes: 5 | Rating: 9 ]

K9AY Loops - A low-band receiving antenna that can fits in a 30-foot circle
[ Hits: 542 | Votes: 2 | Rating: 5 ]

Compact Multi-band Field Day Antenna - A Compact size 80-10 m field day antenna offering a Low angle of radiation and very easy to build and set up
[ Hits: 3107 | Votes: 7 | Rating: 8.29 ]
5 Band Telescopic Vertical Antenna - 5 Band 1/4 wave Telescopic Antenna. The 20m to 10m, antenna is simple and cheap to make, and has a performance that matches commercial antennas but at cost considerably lower. The design was purposely based on a telescoping fibre glass fishing rod as this allows it to be easily stowed away in the car.
[ Hits: 3608 | Votes: 3 | Rating: 9.33 ]

Low Band Receive Antennas - An interesting article about low band receive antenna for Urban QTHs
[ Hits: 543 | Votes: 0 | Rating: 0 ]
Triband Receiving Loop for 160/80/40m - A receiving only loop antenna for low bands, cover 160 to 40 meters with a remote antenna switch box well described and illustrated in this article
[ Hits: 890 | Votes: 1 | Rating: 10 ]

The 10/15/20 Meter Trap Vertical Antenna - This antenna project came out very nice. It's a rugged homebrew multi-band trap vertical antenna that works the 10, 15, and 20 meter amateur radio bands. The antenna can be mounted on the ground or on a mast. Mounted on the ground the antenna has a low take off angle for working DX. If mounted on a mast the antenna will acheive both a low angle as well as another radiation lobe that has a much higher take off angle.
[ Hits: 4175 | Votes: 14 | Rating: 6.08 ]

A Low Cost Multi Band - W3DZZ trapped multi-band antenna, exposed in this practical wireless article
[ Hits: 2056 | Votes: 3 | Rating: 7 ]

The K2AV FCP Single Wire Folded CounterPoise - Efficient Low Band Counterpoise for Restricted Circumstances Loss Avoidance Opportunities and Techniques for the Low Bands The short and linear FCP was designed to reduce ground losses from inadequate radial systems beneath inverted L and other vertical antennas.
[ Hits: 283 | Votes: 0 | Rating: 0 ]
Long Wire Antenna for portable operations - With the view to establish a quick and easy multi-band antenna deployment for portable and camping operations a simple long wire antenna with an earth or earth plus counterpoise arrangement with a 9:1 voltage unun including a tuner or simply with a tuner is one possible solution. With the 9:1 voltage unun and wire lengths suggested in the below tables the antenna should present non extreme impedances for all HF amateur band frequencies. This page is far from complete and represents the ongoing investigation into this type of antenna. Experiments to date seem to have raised more questions than obvious answers.
[ Hits: 804 | Votes: 13 | Rating: 8.69 ]

R3KBO EB104.ru Amateur Radio Products - R3KBO is an amateur radio club producing and developing amateur radio kits and assembled products including HF VHF Power Amplifiers or RF Power Kits and amplifier parts, low pass filfers, band pass filters, sourge protections, splitters and combiners, antenna switches
[ Hits: 513 | Votes: 1 | Rating: 10 ]

DUAL - Antenna and ham equipment manufacturer in Serbia. The Dual company has been producing antennas for more than 25 years focusing on wide bandwidth, designs that work equally well in all weather conditions, very low SWR and superior G/T, F/B and F/S ratios
[ Hits: 400 | Votes: 2 | Rating: 6 ]

RF Front End Protector - If You are using a separate receive antennas then you need a good protection circuit to eliminate the possibility of blowing out the receiver front-end while using these auxiliary receive antennas specially on low bands.
[ Hits: 178 | Votes: 0 | Rating: 0 ]

miniVNA PRO Modifications - The mini Radio Solutions miniVNA PRO is the only affordable vector network analyser (VNA) I know of that offers remote wireless operation. This is very interesting because it allows to measure the input impedance of HF antennas installed at height without having to deal with coax cable lengths, baluns nor common mode suppression chokes. However, to render the miniVNA PRO truly field proof, it requires a number of significant modifications.
[ Hits: 136 | Votes: 5 | Rating: 7.8 ]