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Antenna theory, basics,design antenna
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- Antenna basics
- Basics by From Ian C. Purdie, VK2TIP
- Balun Theory
- The word balun means balanced-unbalanced: it's used to adapt a balanced device to an unbalanced one
- J-Pole theory
- The J-Pole antenna is an omnidirectional antenna that can be used for base, mobile and field day stations. It does not need a ground plane, radials or a complicated matching system. The J-Pole can be cheaply, simply and quickly constructed using a variety of techniques, some of which are discussed in this article.
- Basic Antenna Theory
- Basic antenna theory by sub-TV
- Install a PL-259 on an RG-8X
- A better way to install PL-259 connectors on RG-8X type coax by Dan Richardson, K6MHE
- Why an Antenna Radiates
- How antenna works by ARRL
- Do You Need an Antenna Tuner
- Maybe yes, maybe no. It all depends on the type of antenna and feed line you're using. QST Article in pdf format
- Antennas basics
- An antenna study guide by NZART, cover basic topics like dipoles, wave lenght calculation, baluns, beams, dummy loads, and measurements.
- Antennas and Grounds for apartments
- Suggestions on finding RF ground when you live in an apartment and you want to setup an antenna
- Dipole Height
- How High should my Dipole be?
Dipole Antennas and the effect of height above ground
- How to Construct a Dipole
- Basic and illustrated article on building wire dipole antennas. This page is about "how to build a dipole antenna"
- FAQs - Basic Antenna Theory
- Faqs and antenna basics
- Grounding system
- Perhaps one of the most over looked aspects of setting up a listening post is a ground system
- Antennas : theory and designs
- Thierry LOMBRY, ON4SKY, develops in several long articles all you need to know about antennas, their design and performance, for both amateurs and SWL
- Antennas and Propagation
- The most important element in a radio circuit is the antenna. You may have a powerful transmitter and a frequency, but without the correct antenna, communication will be less than desirable, if not impossible.
This subcourse provides information necessary to make the right choice for an antenna and how to select the correct frequency depending upon the environmental conditions.
Without an understanding of wave propagation, decisions on frequency selection and antennas could result in no communications.
- Low Noise Antenna Connection
- Reducing noise to your antenna can gain your aerial performance, learn how.
- W1GHZ Microwave Antenna Book
- The W1GHZ Online Microwave Antenna Book online
- Understanding Standing Wave Ratios SWR
- We worry a lot about Standing Wave Ratio (SWR) in amateur radio since SWR is one indication of how well our antenna system is working. Most HF transceivers and antenna tuners have built in SWR meters. SWR is a measure of a transceiver’s output power verses the portion of that power reflected by the antenna system By Ken Larson KJ6RZ
- Multiband antennas
- Information on multi-band antennas for the HF bands, from the horizontal end fed wire, to g5rv, log periodics, trap dipoles, vee beams and rhombic antennas.
- Antenna Noise and Signal Cancelling at LF
- By using the signals from two antennas, controlling their relative amplitudes and controlling the phase of one of them, unwanted signal or unwanted noise can be phased out. Circuitry is described which uses the signal from a wire antenna to provide selective cancelling against the signal output from an LF loop antenna.
- G5RV Measurements
- Measurements and characteristics of a G5RV Antenna, including effect of the transmission line as part of the antenna and contributes in a large way to it's multi band characteristics
- Antenna & Mounts
- Mobile antennas, how to install antennas in the roof of a vehicle and how tune antennas.
- Dipole Calculation
- Determining your proper length for the open half-wave dipole antenna
- Using Delta Matching on HF Beams
- Using delta match with HF antennas design
- Coax velocity factor
- Coax Cables velocity factor article in pdf format
- Loading inductors in mobile antennas
- Mobile antennas, loading coil current, and loaded antennas. efficiency and electrical rules.
Loading inductors used in mobile HF antennas.
- Amateur Radio Antennas: Ground Theory
- Perfect ground vs. poor ground. What is the difference? How does the ground influence the DX-gain?
- Radiation and scattering
- Basic antenna theory, Antenna directivity and effective area, Antenna arrays
- Rainbow Antenna Analyzer
- A small and inexpensive measurement device designed to determine antenna performance across the amateur bands through use of automatically collected SWR readings
- Trap antennas, coaxial trap, coax dipole antenna loss resistance
- Testing and comparison of traps and trap antennas
- Low reactance multiband center feed wires
- An antenna system is more easily interfaced to a radio when the input reactance at the feedline terminals is low or close to series resonance
- HF antenna for high rise dwellers
- If you have ever tried transmitting on HF from a tall block of apartments, where it's just not possible to erect a substantial aerial system, then this article is for you by Mel G4WYW
- The DK7ZB-Match for Yagis
- Simple, easy to built match developed in 1995 for Yagis with resistitive loads of 12.5, 18 and 28 Ohm.
- Antenna Transmatch Tips
- Tips on tuning antennas using Antenna Tuning Units also called ATU. This article explains the functions and ills of tuners, along with some guide- lines for building an ATU.
- Quagi and Yagi on 2 Meters
- Designing quagi and yagi antennas on 2 Meters, some preliminary notes by Cebik, W4RNL
Alphabetical
- Link-Coupled Antenna Tuners
- W4RNL tutorial on on inductively coupled (link-coupled) antenna tuners
[Hits: 996 | Votes: 1 | Rating: 10.00] - Loading inductors in mobile antennas
- Mobile antennas, loading coil current, and loaded antennas. efficiency and electrical rules.
Loading inductors used in mobile HF antennas.
[Hits: 2370 | Votes: 1 | Rating: 9.00] - Local QRM reduction
- It is not always possible to tackle the sources of local QRM. What remains is trying to reduce the noise level by means of your antenna system.
Learn how to reduce QRM and understand how cancell noises by PA0SIM
[Hits: 468 | Votes: 0 | Rating: 0.00] - Loop Antenna Basics
- Loop Antenna Basics and Regulatory Compliance for Short-Range Radio
[Hits: 367 | Votes: 0 | Rating: 0.00] - Low Noise Antenna Connection
- Reducing noise to your antenna can gain your aerial performance, learn how.
[Hits: 5012 | Votes: 2 | Rating: 6.00] - Low reactance multiband center feed wires
- An antenna system is more easily interfaced to a radio when the input reactance at the feedline terminals is low or close to series resonance
[Hits: 2036 | Votes: 3 | Rating: 8.67] - Marine corps antenna handbook
- U.S. Marine Corps in PDF format
[Hits: 1571 | Votes: 3 | Rating: 7.00] - Matching Waves, VSWR at work
- When the radiation resistance (voltage to current ratio) of an antenna is the same value as the characteristic impedance of the transmission line (voltage to current ratio in the line), all of the electrical energy transmitted down the line is taken by the antenna and radiated into space in the form of a radio wave.
[Hits: 140 | Votes: 0 | Rating: 0.00] - Maximum Usable Angle
- We are all familiar with Maximum usable frequency. Maximum usable angle is the other half of the maximum usable frequency equation.
[Hits: 31 | Votes: 0 | Rating: 0.00] - Measuring Cable Loss
- Improving measurement accuracy when
low-power analyzers are used.
[Hits: 334 | Votes: 1 | Rating: 5.00] - Mini-Beam Geometry Basics
- There is a natural progression of the geometry of
the "mini-beams" deriving from the basic yagi, which in itself owes a lot to the common dipole. By Dick Stevens, N1RCT
[Hits: 148 | Votes: 0 | Rating: 0.00] - More Information on the EH Antenna
- How EH antennas works and how it has performed.
[Hits: 1566 | Votes: 1 | Rating: 5.00] - Multiband antennas
- Information on multi-band antennas for the HF bands, from the horizontal end fed wire, to g5rv, log periodics, trap dipoles, vee beams and rhombic antennas.
[Hits: 4657 | Votes: 6 | Rating: 4.00] - NVIS Propagation concept
- Army Field Manual 24-18 Appendix M with Graphics
[Hits: 1375 | Votes: 7 | Rating: 9.43] - Optimizing Inductors
- While intended mainly for antenna loading coils, this article also applies to other resonant systems, such as amplifier tank circuits.
[Hits: 221 | Votes: 0 | Rating: 0.00] - Passive antenna re-radiators
- Passive Antenna Re-radiators to function as Q Multipliers
[Hits: 98 | Votes: 0 | Rating: 0.00] - Petlowany Antennas by K6NO
- WorldRadio Article on Petlowany antennas base on this principle: if a length of wire is wound into a spiral-shaped coil and excited by a radio frequency current connected to the innermost portion of the coil, it will then, and only then, exhibit RF characteristics that closely approximate those of a resonant linear wire of the same length
[Hits: 1379 | Votes: 5 | Rating: 7.40] - Polarization, lines of force
- While polarisation may seem insignificant compared with other considerations in setting up a communications system, choosing the right type can make significant improvement in performance.
[Hits: 184 | Votes: 0 | Rating: 0.00] - Quad or Loop antenna
- Information about quad and loop antennas, matching tips, differences on polarization and impedence by PA0FRI
[Hits: 331 | Votes: 2 | Rating: 4.50] - Quagi and Yagi on 2 Meters
- Designing quagi and yagi antennas on 2 Meters, some preliminary notes by Cebik, W4RNL
[Hits: 1889 | Votes: 1 | Rating: 1.00] - Quarter Wave Verticals
- One of the most useful antennas in the repertoire is the Marconi or quarter wave grounded vertical antenna. Its invention made it possible to halve the length of antennas, simplifying communications, especially at HF and below.
[Hits: 776 | Votes: 2 | Rating: 7.00] - Radial System Design
- Are the lengths of antenna radials related to the height of a vertical? By N6LF
[Hits: 216 | Votes: 1 | Rating: 5.00] - Radial systems and ground
- Radial systems for elevated and ground mounted vertical antennas by SteppIR
[Hits: 1432 | Votes: 3 | Rating: 7.67] - Radiation and fields
- Electric Fields, magnetic fields, electromagnetic fields, losses, fresnel zone, nearfield and farfield
[Hits: 269 | Votes: 0 | Rating: 0.00] - Radiation and scattering
- Basic antenna theory, Antenna directivity and effective area, Antenna arrays
[Hits: 2174 | Votes: 2 | Rating: 10.00] - Radiation Characteristics
- Tailoring Patterns for HF Verticals
[Hits: 55 | Votes: 0 | Rating: 0.00] - Rainbow Antenna Analyzer
- A small and inexpensive measurement device designed to determine antenna performance across the amateur bands through use of automatically collected SWR readings
[Hits: 2071 | Votes: 1 | Rating: 7.00] - Receiving Loop Theory - N4YWK
- Sensitivity of multi turn receiving loops
William E. Payne, N4YWK
[Hits: 481 | Votes: 1 | Rating: 1.00] - RMS power
- How it's misused and misunderstood, and why it's not useful.
[Hits: 270 | Votes: 2 | Rating: 5.00] - Sensitivity of Multi Turn Receiving Loops
- Magnetism is manifested as a 'field of vectors', that is, any point in the magnetic field has not only a magnitude, but a direction in space. The four Maxwell equations describe how electric and magnetic vector fields behave and interact.
[Hits: 134 | Votes: 0 | Rating: 0.00] - Single-stub matching
- Single-stub matching of transmission lines to loads
A worked example
[Hits: 140 | Votes: 2 | Rating: 3.00] - Sloper Antenna Tests
- Mark Connelly - WA1ION tests on slooper antennas
[Hits: 616 | Votes: 1 | Rating: 2.00] - Small antennas and radiation resistance
- Small antenna, what causes loss and how to increase radiation resistance in small antennas., A description of loss and radiation resistance.
[Hits: 635 | Votes: 0 | Rating: 0.00] - Some plain facts about multiband vertical antennas
- There is considerable confusion as to what exactly a multiband vertical antenna is. The confusion concerns the method of feed, how much mismatch one can expect, how many radials are required, how the particular antenna is built for multiband use, plus some other points.
[Hits: 1272 | Votes: 1 | Rating: 7.00] - Speedometers SWR Meters and Smith Charts
- Have wondered why a Smith chart has such strange grid lines. Believe it or not, there is a logical progression from Speedometers to Smith charts that will make the Smith grid crystal clear.
[Hits: 176 | Votes: 0 | Rating: 0.00] - Stacking for 50MHz
- Summary of discussion on stacking antennas on six meter band
[Hits: 792 | Votes: 0 | Rating: 0.00] - SteppIR Element Length Study
- Four EZNEC studies for the 3 element SteppIR for 17 meter
[Hits: 405 | Votes: 2 | Rating: 8.50] - SWL antenna distribution system
- A methodology for connecting multiple LF/MF/HF receivers to a single antenna via readily available and inexpensive 75-ohm TV cable. Custom made baluns and splitters provide impedance matching and prevent interaction between receivers.
[Hits: 786 | Votes: 1 | Rating: 8.00] - T-Match Construction
- The T-Match with its balanced feed point is one method of feeding a Balanced Dipole.
[Hits: 53 | Votes: 0 | Rating: 0.00] - Techlib.com Antennas
- Introduction to homebrewing antenna, for AM FM band reception
[Hits: 9 | Votes: 0 | Rating: 0.00] - Testing with the Loop Antenna
- NRSC AM bandwidth measurements with the loop antenna
[Hits: 291 | Votes: 0 | Rating: 0.00] - The Coaxial Line
- Impedance matching, Transmission Lines, Characteristic Impedance, VSWR & Mismatch and Antenna Losses
[Hits: 273 | Votes: 0 | Rating: 0.00] - The Crossed-Field Antenna
- Please be aware this article introduces a completely new concept in antenna theory. In fact, this is considered the most important development relative to antennas in this century. It is so pervasive that a series of articles are required to cover the concept and its applications to the depth and extent it deserves. This is the first publication about the Crossed-Field Antenna
[Hits: 752 | Votes: 1 | Rating: 7.00] - The decibel
- dB the measure of performance explained at radioworks.com
[Hits: 113 | Votes: 0 | Rating: 0.00] - The DK7ZB-Match for Yagis
- Simple, easy to built match developed in 1995 for Yagis with resistitive loads of 12.5, 18 and 28 Ohm.
[Hits: 1932 | Votes: 2 | Rating: 4.50] - The Ferrite Rod Antenna
- Theory of the ferrite rod antenna
[Hits: 253 | Votes: 1 | Rating: 1.00] - The humble Yagi or should that be Uda
- Article about Yagi-UDA antennas
[Hits: 75 | Votes: 1 | Rating: 9.00] - The Impact of Current Distribution on Array Patterns
- Technical Correspondence, QST, July 1990 - Why even "perfect" phased array element currents don't produce perfect patterns.
[Hits: 155 | Votes: 0 | Rating: 0.00] - The mark 2 Crossfield Antenna
- The mark 2 Crossfield Antenna was described in Sprat 76 by Alec, GD3HQR
[Hits: 350 | Votes: 0 | Rating: 0.00] - The mystery of radials
- Effect of radials on the efficiency of antennas.
[Hits: 69 | Votes: 0 | Rating: 0.00] - The Petlowany Principle
- Spipral antenna principle by a concept of Bill Petlowany, K6NO. Tak Antennas are based on this principle, using spirals as dipole linear wires.
[Hits: 35 | Votes: 1 | Rating: 10.00] - The Quarter Wave Sloper or the Inverted-V Dipole
updated
- A question that seems to be asked nearly everyday is, which is best, the quarter
wave sloper or the inverted-V dipole? PDF File by AD communications.
[Hits: 1604 | Votes: 10 | Rating: 6.00] - The Smith Chart
- Understanding smith charts, an introduction to smith charts and it's advantages.
[Hits: 95 | Votes: 1 | Rating: 10.00] - To Trap or Not to Trap
- An interesting article on traps, pros and cons of trapping by W4RNL
[Hits: 1533 | Votes: 0 | Rating: 0.00] - Trap antennas, coaxial trap, coax dipole antenna loss resistance
- Testing and comparison of traps and trap antennas
[Hits: 2038 | Votes: 2 | Rating: 10.00] - Tuning Your Antenna
- Getting the best performance from your investment
[Hits: 652 | Votes: 1 | Rating: 8.00] - Understanding Antennas For The Non-Technical Ham
- A Book By Jim Abercrombie, N4JA.
Reason for writing this book is to educate you so you can make an informed choice concerning the
best antenna for you. Another reason is to dispel the many antenna myths that circulate in the amateur
communit
[Hits: 195 | Votes: 0 | Rating: 0.00] - Understanding Radiation Patterns
- Understanding and using antenna radiation patterns
[Hits: 142 | Votes: 0 | Rating: 0.00] - Understanding Standing Wave Ratios SWR
- We worry a lot about Standing Wave Ratio (SWR) in amateur radio since SWR is one indication of how well our antenna system is working. Most HF transceivers and antenna tuners have built in SWR meters. SWR is a measure of a transceiver’s output power verses the portion of that power reflected by the antenna system By Ken Larson KJ6RZ
[Hits: 4702 | Votes: 4 | Rating: 5.00] - Using Delta Matching on HF Beams
- Using delta match with HF antennas design
[Hits: 2545 | Votes: 2 | Rating: 1.00] - Vertical amtennas among the trees
- Experiments on vertical antennas among the trees by ik2egl
[Hits: 287 | Votes: 0 | Rating: 0.00] - Vertical and Above
- Using vertical on six meters band and above, by Peter Schleuss, HB9RUZ
[Hits: 125 | Votes: 0 | Rating: 0.00] - Vertical plane antennas' beaming comparision
- Animated quad and yagi comparison. You can see antennas' characteristics behavior in a vertical plane with changing of the height.
[Hits: 1704 | Votes: 12 | Rating: 3.15] - Vertical vs Horizontal antenna separation
- Isolation vs antenna separation an interesting article by WA6ILQ
[Hits: 192 | Votes: 2 | Rating: 4.50] - Verticals. Ground systems and some history
- Article gives a good overview of the basics and reflects the accepted wisdom from BC antenna work.
[Hits: 617 | Votes: 0 | Rating: 0.00] - VHF antennas, construction and use
- Article by VU2GT about VHF antennas, how to evaluate performances and models.
[Hits: 225 | Votes: 0 | Rating: 0.00] - VLF-LF and the Loop Aerial
- The article discusses the theory of loop aerials for receiving and how they reduce the level of local noise by Lloyd Butler VK5BR
[Hits: 462 | Votes: 0 | Rating: 0.00] - VSWR Explained
- An interesting article on Voltage Standing Wave Ratio vs Current Standing Wave Ratio by EPARA
[Hits: 393 | Votes: 4 | Rating: 1.25] - W1GHZ Microwave Antenna Book
- The W1GHZ Online Microwave Antenna Book online
[Hits: 4975 | Votes: 12 | Rating: 6.92] - Weatherproof Vertical Antennas
- How to make a Weatherproof Vertically Polarised Omnidirectional Aerial
[Hits: 722 | Votes: 0 | Rating: 0.00] - Why a Beam Antenna
- Some basic antenna information for the newcomer
[Hits: 371 | Votes: 0 | Rating: 0.00] - Why an Antenna Radiates
- How antenna works by ARRL
[Hits: 9989 | Votes: 26 | Rating: 8.28] - Why Are Antennas Built to Look Like They Do?
- The Tech Bench Elmers Amateur Radio Society
[Hits: 118 | Votes: 0 | Rating: 0.00] - Why is 50 ohm coax so special
- Why is 50 ohm Coaxial Line so Special Anyway?
[Hits: 194 | Votes: 0 | Rating: 0.00] - Why Radials ?
- Butternut article on radials usage on vertical and ground plane antennas
[Hits: 167 | Votes: 0 | Rating: 0.00] - Yagi antenna Q Factor
- How you can calculate antenna Q factor for use in antenna quality evaluation instead of use of VSWR bandwidth.
[Hits: 88 | Votes: 2 | Rating: 10.00] - Yagi matching
- A description of the concepts of Yagi matching -
T match and general impedance matching by K2RIW
[Hits: 167 | Votes: 1 | Rating: 1.00]
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