Yet another new, revolutionary design which allows the construction of small HF antennas which provide the same efficiency as large antennas.
(Maybe but probably not !!! - G6KIZ)
This antenna can be built for all HF bands, from 10 to 80 m.
10-80m MOBILE HF MULTIBAND ANTENNA PROJECT
This is a combination center and top loaded multiband antenna. It gets a good boost in efficiency from the
capacity hat which, unlike the commercial bugcatcher antennas, is located where it should be: as high as
practical on the whip. The low profile of the capacity hat lets it cut through the wind while still remaining
effective. This is the largest diameter hat which can withstand highway speeds without using a stiffer whip.
Band switching is accomplished by moving the jumper plug to different tap points on the coil. You have
to stop, get out, and manually change the tap.
Phil Salas AD5X 40 through 6 meter HF Portable Antenna
Simplified and improved design from that published in the July 2002 QST. Now an aluminium tube design which is lighter and more compact tan the original.
W2IK's IK-STIC 2
The IK-STIC 2 is a vertical, all band, antenna that is over 25 feet tall yet weighs under 5 pounds ! Using a tuner it can easily cover the amateur radio HF bands from 40 - 10 Meters. No unsightly wires as the radiating wire is inside the telescoping mast!
A four metre ( 70 MHz ) whip antenna
It seems that every roach pole I’ve bought has added one more whippy top section to my collection of fibre glass that appears to be too thin to properly support an antenna so this project kills two birds with one stone: a four metre portable antenna that uses one of those spare fibreglass fishing pole sections.
The physical design is based on the many portable and mobile whip antennas available for both HF and VHF, with a durable, flexible vertical mounted directly onto a coaxial connector at the feed point. Its dimensions are determined by the materials available – the length of the fishing rod section being a key factor – and the tuning of the antenna.
Two portable 6 meters antennas by VE7CA
Both antennas were designed for easy construction and quick assembly and disassembly. The quad provides a measured gain of 4.2 dB over a dipole and the yagi 5.8 dB over a dipole. Details are given describing the methods used to measure the gain of both antennas.
6 Meter 5/8 Wave Vertical Antenna
The G3JVL 6 Meter ground plane vertical is a compact antenna that is ideal for portable operations. If needed, it can be disassembled into a very small bundle no longer than the longest element.
Although a little engineering work is required, it is well within the abilities of the home workshop and all you newly licensed amateurs or 6 Meter buffs!
IK-STIC by W2IK
The IK-STIC is essentially a multi-band vertical dipole antenna which is used in the field for quick set-up and quick band change. Since operation on each band requires antennas of different lengths, I devised a quick method of modifying the length to suit the band you choose to operate. There are no coils or traps. Each dipole band gives 100% radiation, thereby allowing maximum signal at maximum height.
QRP Six Metre Portable Dipole
Simple design using a central box and two whips. Fits onto a camera tripod.
A Double Quad Antenna for 1296 MHz
This antenna is a medium gain directional antenna for mobile (portable) and base station use. I have built it many years ago for mobile operation to check out how good the signal of the ATV Relais DB0SCS is received in the villages around Schwabach (the QTH of the Relais). I found a similar type for 432 MHz in the literature and decided to calculate the dimensions for 1296 MHz. For the 432 MHz antenna a gain of more then 10dBd was mentioned. This seems reasonable for the size of the antenna. I was always satisfied with the antenna and a direct comparison to other antennas of a know gain showed that it really has to a have a gain of about 10dB over a dipole.
