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Quad and loop antennas comparisons, evaluating the impedance and gain of both antennas and considerationso n horizontal loop antennas for low bands by PA0FRI

Fractal Quad Yagi Antenna by KF7BS published on 73 magazine October 99

German antenna manufacturer for VHF UHF antennas, Quad-antennas, yagi-Antenna, LPDA-Antenna, W-Lan Antennas.

Construction details and tests about a 2 elements cubical quad antenna for HF Bands (20,17,15,12 and 10m band).

January 1955 QST article by W5DQV about constructing a Cubical Quad antenna for 14MHz PDF File

Backpacking, boating or mountaintopping ? Invest your time and pack this novel directional gain antenna on your next expedition

Let's explore the cubical quad antenna, or quad, and see what it really is and how it really works by w8ji

3 Element reversable quad antenna for 40 meters band

Theory of horizontal loop antennas, as discovered by G2PL using a lowered quad antenna and theorized by ZS6AKA

The Quadlong antenna for the six meter band. This antenna feature a total gain of 6,4 dBd, F/B 21 dB and is also available in 70MHz version. Includes detailed pictures and plot diagrams.

A javascript online calculator for popular wire antennas, from the standard easy to build flat-top dipole, to the inverted V dipole, but also the Quad Loop, and the equilateral delta loop antenna

A 2-metre Quad antenna project by K6WXA in PDF file

A 5 band two element quad antenna working from 20 to 10 meters using hardware-store parts or modifying an existing commercial triband quad by KC6T

A four element 2 meter quad antenna project

A 27-28 Mhz quad loop antenna by Bernard Mourot F6BCU in french

Antenna Europe is an Lithuanian ham radio HF antenna manufactured specialized in Quad Antennas. Makers of Cubical Quad Antennas, Yagi Antennas, Antenna switches, Transformers and Robinzon Antennas

Home made WiFi 11dBi, wide band antenna by T. Marshall

probably the most simple and inexpensive antenna you could make for 23cm.

A two meter Quad antenna project with detailed instructions on how to adjust the Quad gamma match

A 2 element small footprint 40 meter phased, reversible, downsized quad array antenna.

The information in this article has come from many amateur sources, the most notable was from WA6TEY (sk 1985) Ray Frost, who was a pioneer of VHF Quad designs and one of the best Southern California Transmitter Hunters. Ray built hundreds two meter quads in single and paired configurations as well as his famous mobile radio direction finding quad.

Amateur Radio HF Cubical Quad and Delta Loop antennas manufacturer based in Spain

Russian Quad antenna manufacturer

A 7 MHz wire antenna that is a mix of a Quad and a Yagi design. This antennas are often used on VHF.

An online javascript calculator for cubical quad antennas, simply input the resonating frequency to calculcate up to a five element quad antenna. This quad antenna calculator let you determine the total length of each element and spacing among elements.

A four elements quad antenna for 144 MHz made with PVC pipes

A page dedicated to the Quadrifilar Helical Antennas, with projects, pictures and antenna plans by OH2GVB

Perfect Quad Co,Ltd japanese ham radio quad antenna manufacturer

Article by G4AON about a 4 and 2 Element Quad Antennas for the 6m band

Information about quad and loop antennas, matching tips, differences on polarization and impedence by PA0FRI

Quad antenna homebrewing, mechanical considerations by IZ7ATH

A new beem antenna design improvement over the cubical quad

How to build a QFH (Quadrifilar Helix Antenna) to download images from weather satellites. A complete tutorial on assembling QFH antenna at home with simple and common tools

Here is the N4TZE, 3 element, 6 meter quad antenna This antenna is tuned to 50.130mhz

A portable swiss quad antenna project made with components and parts that can be dismounted, in German

Simple 6 Metre DX Antenna based on an article by LB Cebick in QST May 2002 on a Quad Turnstile antenna. This antenna is basically two full wave loops mounted at right angles fed 90 degrees out of phase to produce an omni-directional horizontally polarized pattern

Pictures and detailed instructions on installation of the LightningBolt Quad antenna

Building and testing a WLAN 802.11b/g Bi-quad antenna

Commsaudit uk, i/q quadrature , hf receivers, rf, multicoupler, multicouplers, switch matrix, antenna matrices, masthead amplifier,, vhf receiver, uhf,

Lot of pictures, drawings and schematics to build your own QFH Quadri Filar Helix antenna for 137 MHz satellite signals reception

Cheap but effective multiband quad antenna covering the entire horizon on 10-12-15-17-20m bands.

It has been 40 years since the VHF-UHF Quagi antenna--a combination of the desirable features of a Yagi and a cubical quad--was developed and the design was first published in the newsletter of the Southern California VHF Club, a forerunner of today's Western States Weak Signal Society.

Amateur radio Quad Antennas manufacturer based in Italy produce HF and VHF Quad antennas, and spare parts.

A quad turnstile consists of two cubical quad loops oriented in a diamond configuration and angled 90 degrees apart from one another with both diamonds sharing the same top and bottom points

An inverted V Dipole antenna for HF bands, working on 10 20 40 and 80 meters band. PDF Presentation

Basic priciples of Yagi antennas and its variations like Quagi antennas, Quad antennas includes pictures, drawings and online calculators by KN9B

Rotatable Antenna with Phased Elements based on the orignal design concept of HB9CV antennas, is considered to have an higher gain than standard quad antennas. The Swiss Quad Antenna does not need any spreader or boom.

A light and sturdy Quad for 10 and 15 meters. Basic Quad antenna design considerations. Building and assembling a dual band HF QUAD antenna, designing and joining cross-arms and boom, assembling spreader and element wire installation notes. QST article.

The Quadrifilar Helical antenna provides circular polarization and complete hemispherical reception, which is precisely what is needed to receive the polar orbiting weather satellites, and as a 2 meter antenna it will receive horizontal, vertical and clockwise circular polarization.

An article describing basic concepts of antenna radiation, and in particular directional antennas like Yagi antennas or Quad antennas and how they determine the direction or signals.