Antenna Basics For Non Technical Hams - AMATEUR RADIO
Trapped Multi -band Yagis, SteppIR Antenna, The Log -Periodic Array, Directional Cubical Quad and Delta Loop Antennas, Single Band Cubical Quad, field-strength meter, ... Access Document
Trapped Multi -band Yagis, SteppIR Antenna, The Log -Periodic Array, Directional Cubical Quad and Delta Loop Antennas, Single Band Cubical Quad, field-strength meter, ... Access Document
- All About Cubical Quad Antennas 3rd Edition Pdf
- All About Cubical Quad Antennas 3rd Edition Download
- All About Cubical Quad Antennas 3rd Edition 2
- All About Cubical Quad Antennas 3rd Edition 2017
- All About Cubical Quad Antennas
- May 26, 2015 High performance cubical quad antennas 3rd edition by John Koszeghy K3BB. N9VTB, May 25, 2015 #7. WB4CMB Ham Member QRZ Page. Try running a Search, in general or Amazon for: 1. The Cubical Quad by Bob Haviland This one is offered by CQ publications 2. All About Cubical.
- All About Cubical Quad Antennas, Second Edition is THE book to buy if you are interested in a true high-performance antenna. This copy of the very popular paperback about quad antennas is in above average condition. There is some slight wear on the outer covers but the pages are free of writing and marks.
- All About Cubical Quad Antennas Orr, William I. on Amazon.com.FREE. shipping on qualifying offers. All About Cubical Quad Antennas.
High Performance Cubical Quad Antennas 3rd Edition by John Koszeghy, K3BB: a Review. Cebik, W4RNL. John Koszeghy, K3BB (ex-K2OB) has had a love affair with quad beams for 45 years. Indeed, he subtitles his latest volume with just those words.
We were browsing the Net searching for a high gain UHF antenna to be attached We can only find this feature in the cubical quad antennas. Then we You can see the “CJU” antenna details in the Scheme nº1. ... Get Content Here
RHOMBIC ANTENNAS - Comrod
RHOMBIC ANTENNAS With SLOPING VEE kit HF Directional wire antenna 1.5‐30MHz DESCRIPTION ... Access Doc
RHOMBIC ANTENNAS With SLOPING VEE kit HF Directional wire antenna 1.5‐30MHz DESCRIPTION ... Access Doc
Quadantenna - Wikipedia
A quad antenna is a type of directional wire radio antenna used on the HF and VHF bands. Like a Yagi-Uda antenna There are devices that will allow the tilting of the tower to the ground to work on a cubical quad antenna, rotator, or tower. ... Read Article
A quad antenna is a type of directional wire radio antenna used on the HF and VHF bands. Like a Yagi-Uda antenna There are devices that will allow the tilting of the tower to the ground to work on a cubical quad antenna, rotator, or tower. ... Read Article
VHF AND UHF QUAGIS - QSL.net
VHF and UHF Antenna Systems 18-9 driven element. Spacings are similar The cubical quad described earlier overcomes the feed problems to designed and popularized by Wayne Overbeck, N6NB, is an antenna having a full-wave loop driven element and reflector, and Yagi type straight rod ... Fetch Full Source
VHF and UHF Antenna Systems 18-9 driven element. Spacings are similar The cubical quad described earlier overcomes the feed problems to designed and popularized by Wayne Overbeck, N6NB, is an antenna having a full-wave loop driven element and reflector, and Yagi type straight rod ... Fetch Full Source
All About Cubical Quad Antennas 3rd Edition Pdf
But a cubical quad antenna is three-dimensional, so we do not fulfil and 7 elements in UHF while the IOio has the same elements in both bands. The IOio antenna ready to be put away The IOio antenna hung under the trunk lid ... Fetch Doc
Antennas - Halifax-arc.org
Calculating the lengths of resonant antennas-works for loops, verticals, UHF: small size makes multi elements easy Parasitic elements Cubical Quad Directive Antenna -Quiet-Directive-Easily multi-banded. The cubical quad ... View Doc
Calculating the lengths of resonant antennas-works for loops, verticals, UHF: small size makes multi elements easy Parasitic elements Cubical Quad Directive Antenna -Quiet-Directive-Easily multi-banded. The cubical quad ... View Doc
Antennas, 'The Aerial Here Is - CQ Amateur Radio
Antennas, Antenna Specialists UHF “ON-GLASS”® Mobile Antenna, CQ 1990, Cubical Quad Antenna Primer: - Part I (Thurber W8FX), Antennas, The Aerial Here Is.Part II, (Botts K4EJQ), CQ 1999, ... Retrieve Doc
Antennas, Antenna Specialists UHF “ON-GLASS”® Mobile Antenna, CQ 1990, Cubical Quad Antenna Primer: - Part I (Thurber W8FX), Antennas, The Aerial Here Is.Part II, (Botts K4EJQ), CQ 1999, ... Retrieve Doc
High Performance CubicalQuad Antennas 3rd Edition By John ...
High Performance Cubical Quad Antennas 3rd Edition by John Koszeghy, K3BB: a Review . since they provide a perspective on amateur antenna construction that we rarely see. In antenna labs, the use of scaled VHF and UHF antennas often serves as the fundamental ... Fetch This Document
High Performance Cubical Quad Antennas 3rd Edition by John Koszeghy, K3BB: a Review . since they provide a perspective on amateur antenna construction that we rarely see. In antenna labs, the use of scaled VHF and UHF antennas often serves as the fundamental ... Fetch This Document
All About CubicalQuad Antennas, The Famous Handbook On Quad ...
The cubical quad, I created the antenna you see pictured. All about cubical quad antennas: william i. orr Bill Orr does a great job on the description, details, and history of the cubical quad. UHF Antennas; Accessory - Spare Parts; PKW Antenna System. Ditta ... View Document
The cubical quad, I created the antenna you see pictured. All about cubical quad antennas: william i. orr Bill Orr does a great job on the description, details, and history of the cubical quad. UHF Antennas; Accessory - Spare Parts; PKW Antenna System. Ditta ... View Document
RF - Homebrewing A 6 Meter Yagi
RF - Homebrewing a 6 Meter Yagi By Zack Lau, W1VT Six meters is a great band for home built Yagis. The elements are reasonably small, Many people can't mount a 40 meter antenna far enough away from other objects to eliminate detuning effects. ... Read Here
RF - Homebrewing a 6 Meter Yagi By Zack Lau, W1VT Six meters is a great band for home built Yagis. The elements are reasonably small, Many people can't mount a 40 meter antenna far enough away from other objects to eliminate detuning effects. ... Read Here
Antena Quad Suiza Instrucciones De Armado.wmv - YouTube
Antena quad suiza plus gain para 146 mhz , instructivo para armado ... View Video
Antena quad suiza plus gain para 146 mhz , instructivo para armado ... View Video
Antennas - Educatedindia2026.weebly.com
Antennas radiating a vertical polarization are best received antenna for VHF or UHF mobile operations? A 5/8-wavelength antenna has more gain. What is a cubical quad antenna? Two or more parallel four- sided wire loops, each ... Get Document
Antennas radiating a vertical polarization are best received antenna for VHF or UHF mobile operations? A 5/8-wavelength antenna has more gain. What is a cubical quad antenna? Two or more parallel four- sided wire loops, each ... Get Document
Stealth Antennas - Thunderbird Amateur Radio Club
• on VHF / UHF This is not a technical discussion on antenna design, construction and lots of use for raising or shaping the antenna (eg. Wire quad) • Aluminum AC duct tape, with hose clamps! Great for taping around • Cubical Quad on higher HF bands (possible on 10m) • Caveat ... Retrieve Doc
• on VHF / UHF This is not a technical discussion on antenna design, construction and lots of use for raising or shaping the antenna (eg. Wire quad) • Aluminum AC duct tape, with hose clamps! Great for taping around • Cubical Quad on higher HF bands (possible on 10m) • Caveat ... Retrieve Doc
A Portable 2-Element Triband Yagi
A Portable 2-Element Triband Yagi Have you ever dreamed about a por-table beam you could use at your summer cottage, while camp-ing or on Field Day? reflector to a dipole antenna increases the overall gain about 5 dB, depending on the spacing between the elements. ... Get Doc
A Portable 2-Element Triband Yagi Have you ever dreamed about a por-table beam you could use at your summer cottage, while camp-ing or on Field Day? reflector to a dipole antenna increases the overall gain about 5 dB, depending on the spacing between the elements. ... Get Doc
VHF/UHFQuadAntenna - IW5EDI Ham Radio
VHF/UHF Quad 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 of the 1980’s. ... Retrieve Full Source
VHF/UHF Quad 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 of the 1980’s. ... Retrieve Full Source
Hybrid-Double-Quad-Array-Antennas - GB - Datv-agaf
Application is UHF. 4 x Coax 50 Ohms l = n*v*λ /2 Hybrid-Double-Quad-Array Antennas Wavelenght. 4 3 Al 2 3 mm 3 mm 5 m m 5 m m 2 approx. 1mm 1 6 m m 6 16 mm 1 PVC Pipe Cu Hybrid-Double-Quad-Array Antenna for 2.4 GHz. Hybrid-Double-Quad-Array Antenna for 2.4 GHz ... View Doc
Application is UHF. 4 x Coax 50 Ohms l = n*v*λ /2 Hybrid-Double-Quad-Array Antennas Wavelenght. 4 3 Al 2 3 mm 3 mm 5 m m 5 m m 2 approx. 1mm 1 6 m m 6 16 mm 1 PVC Pipe Cu Hybrid-Double-Quad-Array Antenna for 2.4 GHz. Hybrid-Double-Quad-Array Antenna for 2.4 GHz ... View Doc
The Quagi Antenna Turns 30 - Nrharc.org
The Quagi Antenna Turns 30 By Wayne Overbeck, N6NB www.n6nb.com It has been 30 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 ... Retrieve Full Source
The Quagi Antenna Turns 30 By Wayne Overbeck, N6NB www.n6nb.com It has been 30 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 ... Retrieve Full Source
Antennas 101 - Barrow Amateur Radio Club
Isotropic Radiator – A theoretical antenna in free space that radiates equally well in all Antennas 101 Part 2 Directional And Gain Antennas are called “Cubical Quads” because of the ... Doc Retrieval
Isotropic Radiator – A theoretical antenna in free space that radiates equally well in all Antennas 101 Part 2 Directional And Gain Antennas are called “Cubical Quads” because of the ... Doc Retrieval
HF Antennas Especially Stealth Models For Those In An HOA
HF Antennas Especially stealth models for those in an HOA By Dave Land to build, can be made with small gauge wire For stealth applications (suggest 18ga black wire from Frys) Single band antenna when fed by Ventenna for VHF/UHF . Great Antenna Reference Website •Reviews of ... Get Document
HF Antennas Especially stealth models for those in an HOA By Dave Land to build, can be made with small gauge wire For stealth applications (suggest 18ga black wire from Frys) Single band antenna when fed by Ventenna for VHF/UHF . Great Antenna Reference Website •Reviews of ... Get Document
Revisiting Rectangular Loop Antenna - Onlinepresent.org
Revisiting Rectangular Loop Antenna . Erwin B. Daculan and Elmer P. Dadios . ECE Department, connected in 1942 the cubical quad antenna to a radio station in Quito, Equador. He called it ‘quad’ being of four sides. Quad antennas are later better known as ... Read Here
Revisiting Rectangular Loop Antenna . Erwin B. Daculan and Elmer P. Dadios . ECE Department, connected in 1942 the cubical quad antenna to a radio station in Quito, Equador. He called it ‘quad’ being of four sides. Quad antennas are later better known as ... Read Here
QUAD ARRAY LOOP YAGI ANTENNA - Home » MiMOMax
2 Quad – Array Loop Yagi Antenna Packing Contents Array frame pack 4 x frame parts labelled part 1-4 8 x clamp halves 8 x M6x100 bolts 32 x M6x16 bolts ... Retrieve Doc
2 Quad – Array Loop Yagi Antenna Packing Contents Array frame pack 4 x frame parts labelled part 1-4 8 x clamp halves 8 x M6x100 bolts 32 x M6x16 bolts ... Retrieve Doc
All About Cubical Quad Antennas 3rd Edition Download
A two-element quad antenna used by an amateur radio station
A 4-element amateur radio quad antenna. The two men working on it show the scale. The wire loops are almost invisible, suspended on the ends of the crossed supports.
A quad antenna is a type of directional wire radio antenna used on the HF and VHF bands. Like a Yagi–Uda antenna ('Yagi'), a quad consists of a driven element and one or more parasitic elements; however in a quad, each of these elements is a loop antenna, which may be square, round, or some other shape. It is used by radio amateurs on the HF and VHF amateur bands.
History[edit]
The quad antenna is a development of several inventions.
- In 1924, Moses Jacobson patented a loop antennas with rhombic shape.[1]
- In 1938, George Brown et al. patented a loop antenna with rhombic shape and quarterwave sides.[2]
- In 1951 Clarence C. Moore, W9LZX, a Christian Missionary and engineer at HCJB (a shortwave missionary radio station high in the Andean Mountains) developed and patented [3]a two-turn loop antenna that he called a 'quad'. He developed this antenna to resolve issues caused by large coronal discharges while using a beam antenna in the thin air of higher altitudes. Moore describes his antenna as 'a pulled-open folded dipole'. While the main point of Moore's patent was the two turn single loop design which is not the antenna termed 'quad' today, the patent does include a mention and illustration of a two element unidirectional 'quad', and describes the time when the full wave loop concept was developed:
It is a further object of the present invention to provide a loop antenna having an even number of turns of a length of one or more wave lengths around each turn in which substantially no voltage components are present and the only voltage existing is that due to the impedance between the adjacent loops.
We took about one hundred pounds of engineering reference books with us on our short vacation to Posoraja, Ecuador during the summer of 1942, determined that with the help of God we could solve our problem. There on the floor of our bamboo cottage we spread open all the reference books we had brought with us and worked for hours on basic antenna design. Our prayers must have been answered, for gradually as we worked the vision of a quad-shaped antenna gradually grew with the new concept of a loop antenna having no ends to the elements, and combining relatively high transmitting impedance and high gain.
- Moore's design eliminated interference from coronal discharge. 'End effect', which is inherent with the Yagi, is absent in a quad because its elements have no ends. But other advantages appeared. The higher impedance mentioned in the quote above translates to lower current and thus lower loss on the transmission lines, and gain is higher than that of a Yagi.
- In 1957 James Sherriff McCaig patented what we know as a 'cubical' (two-element) multi-band quad antenna.[4]
- In 1960 Rudolf Baumgartner patented the Swiss quad[5][6]
- In 1969 Werner Boldt invented the DJ4VM quad.[7]
- In 1971 Hans F. Ruckert invented the 'Mono-Loop Tri-Band Cubical Quad' .[8]
Advantages over a Yagi–Uda[edit]
Rigorous testing of the quad antenna show the following advantages over a Yagi–Uda antenna.[9]
Polarization[edit]
It is easy to change polarization from vertical to horizontal.
Multiband antenna[edit]
It is easier to design a multiband quad antenna than a multiband Yagi antenna.
Higher gain[edit]
The 2-element quad has almost the same gain as a 3-element Yagi: about 7.5 dB over a dipole. Likewise, a 3-element quad has more gain than a 3-element Yagi. However, adding quad elements produces diminishing returns. Quoting from William Orr, 'Whereas parasitic beams having twenty or thirty parasitic directors are efficient, high gain antennas, it would seem ... that maximum practical number of parasitic loop elements for the quad array is limited to four or five.' (Orr, p. 48)
Radiation resistance[edit]
Radiation resistance is affected by antenna height above ground, element spacing, and environmental conditions. However, values will be higher than for a Yagi and more closely matched to a 50 Ohm coaxial feed.
Lower boom height[edit]
'A two-element, three-band quad, with elements mounted only 35 feet above ground, will give good performance in situations where a triband Yagi will not.'[10]
Shorter boom[edit]
William Orr's book[11] shows a 10-15-20 meter, 2-element Quad with boom length of 6′10″.
Internally stackable[edit]
Interaction between antennas of a multiband quad are quite low, even when fed with a single feed line. (Orr, 1959, pg. 63)
Lower radiation angle[edit]
According to K0SR[12] the false claim that quads 'open the band earlier', which suggests that they exhibit a lower angle of radiation than Yagis, has persisted for 50 years computer models agree. He posits that the vertical sides of each element actually radiate the low angle component.
Disadvantages compared to other antennas[edit]
All About Cubical Quad Antennas 3rd Edition 2
Bandwidth[edit]
If tuned for maximum gain, the bandwidth for a 3-element quad antenna is limited: Deviation from the design frequency will unbalance the near-resonance condition of the parasitic elements. However, lengthening the director elements, thereby sacrificing approximately 1 dB gain, allows for much broader bandwidth.
Maintenance[edit]
A quad is a 3-dimensional antenna so maintenance can be difficult. Even with a tilt-over tower, tall ladders or a bucket truck may be needed. There are devices that will allow the tilting of the tower to the ground to work on a cubical quad antenna, rotator, or tower. It works by letting the quad loops swivel out of the way. When the tower is in the operational position the elements are locked into position (the locking mechanism is powered by gravity).
References[edit]
All About Cubical Quad Antennas 3rd Edition 2017
- ^U.S. Patent 1747008, Antenna. http://www.google.com/patents/US1747008
- ^U.S. Patent 2207781, Ultra high frequency antenna. http://www.google.com/patents/US2207781
- ^U.S. Patent 2537191. http://www.google.com/patents/US2537191
- ^GB Patent 850974 Improvements relating to composite aerials. http://www.puertobalsillas.com/radio/GB850974A.pdf GB850974A
- ^Swiss Patent 384644, Vollgespeiste Richtantenne für Kurz- und Ultrakurzwellen. http://www.puertobalsillas.com/radio/384644.pdf 384644
- ^Die Swiss-Quad-Antenne DL-QTC, 1963/10, page 454.
- ^Ham Radio August 1969 page 41-46
- ^CQ, Januari, 1971,page 41-43.
- ^Orr, William I, & Stuart D. Cowan. (1959). All About Cubical Quad Antennas. Radio Publications. ISBN0-933616-03-1, ISBN978-0-933616-03-5, LCCN 82080282.
- ^ARRL. The ARRL Antenna Book. 17th edition, Chapter 12, p. 12-1 to 12-13.
- ^Orr, William I. (1996). The W6SAI HF Antenna Handbook. ISBN978-0-943016-15-3.
- ^ARRL. (Jan/Feb 2008). National Contest Journal. p. 5.
All About Cubical Quad Antennas
External links[edit]
- Building a Quad Antenna by Dean VK5DJM.
- Antenas Cúbicas Quad antennas page info by EA1DDO, in Spanish.
- Quad Antenna Gallery Large Quad Antenna gallery with +300 photos.
- N8PPQ N8PPQ's circular quad antenna.
- N6ACH N6ACH quad antenna calculator.
- WA2OOO WA2OOO Cubical Quad guide to Advantages and Dimensions and Calculator.
Retrieved from 'https://en.wikipedia.org/w/index.php?title=Quad_antenna&oldid=946303337'