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Antenna theory, basics,design antenna
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- Antenna basics
- Basics by From Ian C. Purdie, VK2TIP
- Basic Antenna Theory
- Basic antenna theory by sub-TV
- 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.
- Balun Theory
- The word balun means balanced-unbalanced: it's used to adapt a balanced device to an unbalanced one
- Why an Antenna Radiates
- How antenna works by ARRL
- Antennas and Grounds for apartments
- Suggestions on finding RF ground when you live in an apartment and you want to setup an antenna
- FAQs - Basic Antenna Theory
- Faqs and antenna basics
- How to Construct a Dipole
- Basic and illustrated article on building wire dipole antennas. This page is about "how to build a dipole antenna"
- 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
- 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
- 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
- Dipole Height
- How High should my Dipole be?
Dipole Antennas and the effect of height above ground
- Low Noise Antenna Connection
- Reducing noise to your antenna can gain your aerial performance, learn how.
- 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.
- W1GHZ Microwave Antenna Book
- The W1GHZ Online Microwave Antenna Book online
- 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
- 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.
- 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
- Why I use dBi
- Info about Gain
- Radiation and scattering
- Basic antenna theory, Antenna directivity and effective area, Antenna arrays
- Loading inductors in mobile antennas
- Mobile antennas, loading coil current, and loaded antennas. efficiency and electrical rules.
Loading inductors used in mobile HF antennas.
Alphabetical
- VSWR Explained
new
- An interesting article on Voltage Standing Wave Ratio vs Current Standing Wave Ratio by EPARA
[Hits: 35 | Votes: 1 | Rating: 1.00] - Antenna basics
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- Basics by From Ian C. Purdie, VK2TIP
[Hits: 16572 | Votes: 17 | Rating: 4.12] - Basic Antenna Theory
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- Basic antenna theory by sub-TV
[Hits: 11227 | Votes: 7 | Rating: 5.57] - J-Pole theory
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- 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.
[Hits: 10270 | Votes: 14 | Rating: 6.56] - 50MHz Power Splitters
- Splitting an antenna between two receivers or
in use as the phasing harness in stacked antennas where there is a need to equally split the power from the transmitter between two antennas
[Hits: 979 | Votes: 3 | Rating: 10.00] - A Collection of Smith Chart Resources
- The Smith Chart was originally created many years ago as an RF engineering aid by Phillip Smith of RCA.These pages includes extesnive documentation on smith carts.
[Hits: 622 | Votes: 4 | Rating: 2.50] - A Modern Thermocouple Ammeter
- Thermocouple ammeters are very rare these days, but the job they were perfect for - measuring antenna currents - is still a modern requirement especially in respect to groundplane currents. By David A. Reid PA3HBB G0BZF
[Hits: 701 | Votes: 0 | Rating: 0.00] - About trap antennas
- Negatives sides of using trap antennas
[Hits: 301 | Votes: 1 | Rating: 4.00] - Actual Antenna SWR
- Easy for calculate formula which could be a wake-up call for you.
The SWR value at the input of antenna cable is not a actual SWR of your favorite antenna.
[Hits: 514 | Votes: 0 | Rating: 0.00] - Advanced active VLF Loop
- Article on using loop antenna in very low frequencies
[Hits: 463 | Votes: 0 | Rating: 0.00] - All HF Band Antennas
- F6ITV consideration on HF Antennas, from trap wired anternnas, to center feed antennas.
[Hits: 718 | Votes: 0 | Rating: 0.00] - Amateur Radio Antennas: Ground Theory
- Perfect ground vs. poor ground. What is the difference? How does the ground influence the DX-gain?
[Hits: 1314 | Votes: 0 | Rating: 0.00] - Analyzing Three Antenna Analyzers
- On this page W8WWV present some measurements he made with three of the popular antenna analyzers.
MFJ MFJ-269, AEA CIA-HF, Autek RF-1
[Hits: 145 | Votes: 0 | Rating: 0.00] - Another way to look at vertical antennas
- What’s the difference between a dipole and a vertical? Maybe not as much as you think. Come along
and try another point of view.
[Hits: 968 | Votes: 0 | Rating: 0.00] - Antenna & Mounts
updated
- Mobile antennas, how to install antennas in the roof of a vehicle and how tune antennas.
[Hits: 1427 | Votes: 4 | Rating: 7.75] - Antenna Cable Loss and SWR
- Calculate Cable Loss from SWR and reverse. Text file with only two simply formulas
[Hits: 363 | Votes: 1 | Rating: 10.00] - Antenna Gain Comparison System
updated
- This device goal is to optimize homebrew antenna for the V/UHF band. This tool, is based itself on the simultaneously comparison between two antenna, directly in dB. by IK0BDO
[Hits: 546 | Votes: 2 | Rating: 7.00] - Antenna Glossary
- From Radiall-Larsen Antenna Technologies website technical reference documents
[Hits: 407 | Votes: 1 | Rating: 7.00] - Antenna Height Theory
- Antenna mounting height, the higher the better? Learn how radiation pattern change, and decide if you need an higher or a lower angle for your dx needs.
[Hits: 659 | Votes: 1 | Rating: 1.00] - Antenna Modeling Files
- A collections of antenna models submitted to arrl and can be used with NEC-4 or Yagi Optimizer modeling programs
[Hits: 500 | Votes: 0 | Rating: 0.00] - Antenna Modelling
- Antenna modelling notes, including wich antenna modelling software choose and where to find useful resources for antenna planning and home-brewing.
[Hits: 1043 | Votes: 0 | Rating: 0.00] - 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.
[Hits: 3306 | Votes: 2 | Rating: 5.50] - Antenna Polarization notes
- Antenna polarization is a very important consideration when choosing and installing an antenna. Most communications systems use either vertical, horizontal or circular polarization. Knowing the difference between polarizations and how to maximize their benefit is very important to the antenna user.
[Hits: 1201 | Votes: 4 | Rating: 3.50] - Antenna Selection Made Easy
- This page will help you answer important questions about antenna selection before you talk to a supplier. After reading this paper, you should be able to better determine the most important parameters you need to know for your antenna selection criteria.
[Hits: 836 | Votes: 1 | Rating: 1.00] - Antenna Theory
- A discussion of antenna theory by Paul Graham, K9ERG , one of the better antenna explainations out there
[Hits: 1025 | Votes: 7 | Rating: 7.43] - Antenna tips for the beginner
- Some rules of thumb for beginners, with a QRP approach, by James R. Duffey KK6MC/5
[Hits: 738 | Votes: 0 | Rating: 0.00] - 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.
[Hits: 1267 | Votes: 1 | Rating: 10.00] - 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
[Hits: 4398 | Votes: 8 | Rating: 3.50] - 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.
[Hits: 3504 | Votes: 15 | Rating: 7.33] - Antennas and Grounds for apartments
- Suggestions on finding RF ground when you live in an apartment and you want to setup an antenna
[Hits: 6276 | Votes: 1 | Rating: 9.00] - Antennas and transmission lines
- A very exaustive article on antennas and transmission lines. Covers many aspects of antennas and feed lines, in spanish
[Hits: 190 | Votes: 0 | Rating: 0.00] - Balun Theory
- The word balun means balanced-unbalanced: it's used to adapt a balanced device to an unbalanced one
[Hits: 9141 | Votes: 10 | Rating: 6.29] - Basic antenna concepts
- Radiall-Larsen Antenna technologies, technical reference document describing main features of antennas, pattern types, antenna polarization and basic antenna types
[Hits: 577 | Votes: 0 | Rating: 0.00] - Better Feedline Loss Measurements with Antenna Analyzers
- Various publications through the years have shown how the SWR measured on a shorted (or open) feed line can be used to calculate feed line attenuation
[Hits: 408 | Votes: 0 | Rating: 0.00] - Calculate antenna gain
- Guide to calculate effective gain of antennas by Sommer Antennas
[Hits: 644 | Votes: 4 | Rating: 5.75] - Choosing Wire Size for Toroidal Inductors
updated
- Measurements that show it doesn't make much difference
[Hits: 140 | Votes: 4 | Rating: 6.25] - Coax Cable Loss
- Table representing loss of Coax Cables in db per 100ft.
[Hits: 739 | Votes: 1 | Rating: 6.00] - Coax velocity factor
- Coax Cables velocity factor article in pdf format
[Hits: 1167 | Votes: 7 | Rating: 4.43] - Coaxial cable dipole for 80m
- Here are some simple antennas you can build along with calculators to help you get the right length.
[Hits: 637 | Votes: 1 | Rating: 5.00] - Common-Mode Noise
- Receiving Common Mode Noise shows how lack of a balun can contribute to system noise
[Hits: 648 | Votes: 1 | Rating: 10.00] - Conductors for HF Antennas
- Putting up an antenna for the low bands? What kind of wire will you use? This analysis may change your plans.
[Hits: 551 | Votes: 1 | Rating: 9.00] - CSVHFS Antenna Gain Measurements
- The Central States VHF Society has conducted Antenna Gain Measurements since its inception in 1967. Comparisons between commercial and homebrew antennas, between different homebrew designs, and between different commercial designs. Mostly VHF UHF and up antennas.
[Hits: 424 | Votes: 1 | Rating: 10.00] - Currents in Standing-Wave Antennas
- How can the current "flowing" out of the top of a mobile loading coil be greater than the current "flowing" into the bottom of the coil?
[Hits: 116 | Votes: 0 | Rating: 0.00] - Diplexer design notes
- Standard diplexer design is based on singly-terminated Butterworth filters.
[Hits: 463 | Votes: 2 | Rating: 8.00] - Dipole Antenna Radiation Patterns
- Much confusion exists about the radiation patterns of antennas. In particular, the horizontal
dipole is misunderstood by most who use it.
[Hits: 566 | Votes: 3 | Rating: 4.33] - Dipole Calculation
- Determining your proper length for the open half-wave dipole antenna
[Hits: 1108 | Votes: 4 | Rating: 7.50] - Dipole Height
- How High should my Dipole be?
Dipole Antennas and the effect of height above ground
[Hits: 4088 | Votes: 6 | Rating: 5.33] - Directional arrays
- About collinear array antennas
[Hits: 472 | Votes: 0 | Rating: 0.00] - 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
[Hits: 5419 | Votes: 5 | Rating: 5.20] - Easy way antenna systems
- Written by John M. Haerle, WB5IIR (SK). A must read for anyone considering building a good low cost HF multi-band antenna system.
[Hits: 282 | Votes: 1 | Rating: 10.00] - Effects of Very Large Ground Screens
- A theoretical and experimental study of the effects of very large ground screens on 20 meter verticals
[Hits: 86 | Votes: 0 | Rating: 0.00] - Effects of VSWR on Transmitted Power
- By James G. Lee, W6VAT
[Hits: 341 | Votes: 1 | Rating: 9.00] - FAQs - Basic Antenna Theory
- Faqs and antenna basics
[Hits: 5777 | Votes: 3 | Rating: 6.00] - Fiber Glass Rods and Tubes
- Properties of fiber glass rods and tubes
[Hits: 405 | Votes: 1 | Rating: 5.00] - G/T Simulations - by VE7BQH
- Here you will find information on how antennas behave when stacked
G/T is an important figure-of-merit for the antenna's overall receive performance, because it balances forward gain (G) against received thermal noise (T).
[Hits: 165 | Votes: 3 | Rating: 5.67] - 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
[Hits: 3062 | Votes: 4 | Rating: 6.00] - Ground Problems
- Collection of articles about ground systems
[Hits: 470 | Votes: 1 | Rating: 7.00] - Grounding system
- Perhaps one of the most over looked aspects of setting up a listening post is a ground system
[Hits: 5175 | Votes: 5 | Rating: 4.80] - Harmonic Operation of OCFs
- Up, Up, and Away or Harmonic Operation of OCFs
[Hits: 77 | Votes: 0 | Rating: 0.00] - 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
[Hits: 810 | Votes: 0 | Rating: 0.00] - How to Construct a Dipole
- Basic and illustrated article on building wire dipole antennas. This page is about "how to build a dipole antenna"
[Hits: 5594 | Votes: 9 | Rating: 7.00] - Idiot's guide to antennas
- A very basic guide to antennas concept. Explain the usage of dummy load, basic antennas like dipole o j-poles.
[Hits: 354 | Votes: 0 | Rating: 0.00] - Importance of noise reduction in wires antennas
- An old post by John Doty about effects of noise in longwire antenna.
[Hits: 117 | Votes: 0 | Rating: 0.00] - Indoor Random Wire versus Indoor Magnetic Loop
- Comparison of performance between an indoor random wire versus a magnetic loop using psk31
[Hits: 582 | Votes: 1 | Rating: 6.00] - 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
[Hits: 5248 | Votes: 6 | Rating: 7.50] - Integrated Publishing Basics
- Radio wave propagation, Principles of transmission lines, Antennas
[Hits: 701 | Votes: 0 | Rating: 0.00] - Interference Cancelling System
- The use of interference signal cancellation has been around for some time. The idea is to use an auxiliary antenna almost any random length of wire in addition to the main receiving antenna
[Hits: 950 | Votes: 1 | Rating: 3.00] - K-FACTOR Table & Chart
- Determine the K-Factor used as a multiplier when constructing half-wave antennas.
[Hits: 870 | Votes: 7 | Rating: 3.29] - Les antennes: antenna theory
- A basic antenna theory with final quiz in french
[Hits: 90 | Votes: 0 | Rating: 0.00] - Link-Coupled Antenna Tuners
- W4RNL tutorial on on inductively coupled (link-coupled) antenna tuners
[Hits: 137 | Votes: 0 | Rating: 0.00] - 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: 1459 | Votes: 0 | Rating: 0.00] - 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: 363 | Votes: 0 | Rating: 0.00] - Loop Antenna Basics
- Loop Antenna Basics and Regulatory Compliance for Short-Range Radio
[Hits: 175 | Votes: 0 | Rating: 0.00] - Low Noise Antenna Connection
- Reducing noise to your antenna can gain your aerial performance, learn how.
[Hits: 3830 | 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: 1346 | Votes: 2 | Rating: 8.00] - Marine corps antenna handbook
- U.S. Marine Corps in PDF format
[Hits: 517 | Votes: 2 | Rating: 10.00] - Measuring Cable Loss
- Improving measurement accuracy when
low-power analyzers are used.
[Hits: 204 | Votes: 0 | Rating: 0.00] - More Information on the EH Antenna
- How EH antennas works and how it has performed.
[Hits: 1207 | 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: 3017 | Votes: 2 | Rating: 8.00] - Optimizing Inductors
- While intended mainly for antenna loading coils, this article also applies to other resonant systems, such as amplifier tank circuits.
[Hits: 135 | 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: 388 | Votes: 1 | Rating: 10.00] - Quad or Loop antenna
- Information about quad and loop antennas, matching tips, differences on polarization and impedence by PA0FRI
[Hits: 63 | Votes: 0 | Rating: 0.00] - Quagi and Yagi on 2 Meters
- Designing quagi and yagi antennas on 2 Meters, some preliminary notes by Cebik, W4RNL
[Hits: 1107 | Votes: 1 | Rating: 1.00] - Radial systems and ground
- Radial systems for elevated and ground mounted vertical antennas by SteppIR
[Hits: 952 | Votes: 2 | Rating: 7.50] - Radiation and fields
- Electric Fields, magnetic fields, electromagnetic fields, losses, fresnel zone, nearfield and farfield
[Hits: 211 | Votes: 0 | Rating: 0.00] - Radiation and scattering
- Basic antenna theory, Antenna directivity and effective area, Antenna arrays
[Hits: 1581 | Votes: 2 | Rating: 10.00] - 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: 1149 | Votes: 1 | Rating: 7.00] - Receiving Loop Theory - N4YWK
- Sensitivity of multi turn receiving loops
William E. Payne, N4YWK
[Hits: 408 | Votes: 0 | Rating: 0.00] - RMS power
- How it's misused and misunderstood, and why it's not useful.
[Hits: 175 | Votes: 0 | Rating: 0.00] - 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: 75 | Votes: 0 | Rating: 0.00] - 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: 551 | 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: 581 | 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: 88 | Votes: 0 | Rating: 0.00] - Stacking for 50MHz
- Summary of discussion on stacking antennas on six meter band
[Hits: 426 | Votes: 0 | Rating: 0.00] - SteppIR Element Length Study
- Four EZNEC studies for the 3 element SteppIR for 17 meter
[Hits: 264 | Votes: 0 | Rating: 0.00] - 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: 645 | Votes: 1 | Rating: 8.00] - Testing with the Loop Antenna
- NRSC AM bandwidth measurements with the loop antenna
[Hits: 174 | 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: 362 | 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: 1125 | Votes: 0 | Rating: 0.00] - The Ferrite Rod Antenna
- Theory of the ferrite rod antenna
[Hits: 176 | Votes: 1 | Rating: 1.00]
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