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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 balancedunbalanced: it's used to adapt a balanced device to an unbalanced one
 JPole theory
 The JPole 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 JPole can be cheaply, simply and quickly constructed using a variety of techniques, some of which are discussed in this article.
 Antennas basics
 An antenna study guide by NZART, cover basic topics like dipoles, wave lenght calculation, baluns, beams, dummy loads, and measurements.
 Install a PL259 on an RG8X
 A better way to install PL259 connectors on RG8X type coax by Dan Richardson, K6MHE
 Basic Antenna Theory
 Basic antenna theory by subTV
 Antennas and Grounds for apartments
 Suggestions on finding RF ground when you live in an apartment and you want to setup an 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
 Dipole Height
 How High should my Dipole be?
Dipole Antennas and the effect of height above ground
 Why an Antenna Radiates
 How antenna works by ARRL
 Grounding system
 Perhaps one of the most over looked aspects of setting up a listening post is a ground system
 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
 Types of multiband antennas
 Types of multiband antennas for the HF bands, from the horizontal end fed wire, to g5rv, log periodics, trap dipoles, vee beams and rhombic antennas.
 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
 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
 Low Noise Antenna Connection
 Reducing noise to your antenna can gain your aerial performance, learn how.
 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
 Amateur Radio Antennas: Ground Theory
 Perfect ground vs. poor ground. What is the difference? How does the ground influence the DXgain?
 Antenna & Mounts
 Mobile antennas, how to install antennas in the roof of a vehicle and how tune antennas.
 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
 Using Delta Matching on HF Beams
 Using delta match with HF antennas design
 Dipole Calculation
 Determining your proper length for the open halfwave dipole antenna
 The Quarter Wave Sloper or the InvertedV Dipole
 A question that seems to be asked nearly everyday is, which is best, the quarter
wave sloper or the invertedV dipole? PDF File by AD communications.
 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
 Loading inductors in mobile antennas
 Mobile antennas, loading coil current, and loaded antennas. efficiency and electrical rules.
Loading inductors used in mobile HF antennas.
 Directional arrays
 About collinear array antennas
 Actual Antenna SWR
 Easy for calculate formula which could be a wakeup call for you.
The SWR value at the input of antenna cable is not a actual SWR of your favorite antenna.
 Coax velocity factor
 Coax Cables velocity factor article in pdf format
 To Trap or Not to Trap
 An interesting article on traps, pros and cons of trapping by W4RNL
 Marine corps antenna handbook
 U.S. Marine Corps in PDF format
 Another way to look at vertical antennas
 What iss the difference between a dipole and a vertical? Maybe not as much as you think. Come along
and try another point of view.
 The DK7ZBMatch 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.
 Radiation and scattering
 Basic antenna theory, Antenna directivity and effective area, Antenna arrays
 Trap antennas, coaxial trap, coax dipole antenna loss resistance
 Testing and comparison of traps and trap antennas
 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.
 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
 Coaxial cable dipole for 80m
 Here are some simple antennas you can build along with calculators to help you get the right length.
 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
 Sloper Antenna Tests
 Mark Connelly  WA1ION tests on slooper antennas
Alphabetical
 HF loops vs Half Loops
 HF loop and halfloop antennas in a few words
[Hits: 1030  Votes: 0  Rate: 0.00]
 Horizontal Antennas above Real Ground
 Antennas are influenced by the effect of the ground and by the type of conductors from which they are constructed. Effects of various types of grounds on a 1.825 MHz horizontal 0.5 wave dipole
[Hits: 396  Votes: 0  Rate: 0.00]
 Horizontal Halfwave Dipole above a Counterpoise
 All antennas that are situated close to the ground are affected by that ground to some extent. This article explain effects and benefits of counterpoise.
[Hits: 980  Votes: 0  Rate: 0.00]
 Horizontal vs Vertical Antennas
 CX2UA article on differences of vertical and horizontal antennas in spanish
[Hits: 197  Votes: 4  Rate: 7.75]
 How good an antenna is ?
 How good is an antenna?
Four figures describe how good an antenna is compared to the required performance, swr directivity gain and bandwidth
[Hits: 137  Votes: 0  Rate: 0.00]
 How important is Low SWR
 What exacly is the meaning of SWR ? Is a Low SWR really important
[Hits: 557  Votes: 4  Rate: 7.50]
 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: 9839  Votes: 18  Rate: 6.73]
 How's Your SWR?
 Chart showing how SWR effects how much power you actually radiate from your antenna.
[Hits: 762  Votes: 0  Rate: 0.00]
 Human Body Resonance Frequencies
 Wondering whether human body could be used as an antenna.
[Hits: 110  Votes: 0  Rate: 0.00]
 Idiot's guide to antennas
 A very basic guide to antennas concept. Explain the usage of dummy load, basic antennas like dipole o jpoles.
[Hits: 1007  Votes: 1  Rate: 10.00]
 Importance of noise reduction in wires antennas
 An old post by John Doty about effects of noise in longwire antenna.
[Hits: 1287  Votes: 0  Rate: 0.00]
 Indoor Random Wire versus Indoor Magnetic Loop
 Comparison of performance between an indoor random wire versus a magnetic loop using psk31
[Hits: 817  Votes: 2  Rate: 7.00]
 Inductors used in antenna matching networks
 Article about variometers, helipot inductors, roller inductors, binary switched inductors, Coil and Capstan by G3YNH
[Hits: 321  Votes: 1  Rate: 1.00]
 Integrated Publishing Basics
 Radio wave propagation, Principles of transmission lines, Antennas
[Hits: 815  Votes: 0  Rate: 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: 1510  Votes: 1  Rate: 3.00]
 KFACTOR Table & Chart
 Determine the KFactor used as a multiplier when constructing halfwave antennas.
[Hits: 2413  Votes: 34  Rate: 3.83]
 Large Antenna in a fixed direction?
 If your antenna is fixed in one direction, you will notice that your antenna works perfectly only during fall and spring.
[Hits: 150  Votes: 0  Rate: 0.00]
 Les antennes: antenna theory
 A basic antenna theory with final quiz in french
[Hits: 202  Votes: 0  Rate: 0.00]
 LinkCoupled Antenna Tuners
 W4RNL tutorial on on inductively coupled (linkcoupled) antenna tuners
[Hits: 2217  Votes: 2  Rate: 5.50]
 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: 3707  Votes: 3  Rate: 6.67]
 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: 600  Votes: 0  Rate: 0.00]
 Log Periodic vs Yagi Antenna
 Article on Yagi and Log periodic antennas by Tom, K1JJ
[Hits: 72  Votes: 1  Rate: 5.00]
 Loop Antenna Basics
 Loop Antenna Basics and Regulatory Compliance for ShortRange Radio
[Hits: 545  Votes: 0  Rate: 0.00]
 Low Noise Antenna Connection
 Reducing noise to your antenna can gain your aerial performance, learn how.
[Hits: 6834  Votes: 2  Rate: 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: 2734  Votes: 5  Rate: 8.80]
 Marine corps antenna handbook
 U.S. Marine Corps in PDF format
[Hits: 3361  Votes: 5  Rate: 7.80]
 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: 318  Votes: 0  Rate: 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: 87  Votes: 0  Rate: 0.00]
 Measuring Antenna System SWR
 Have you measured the SWR at the antenna?
[Hits: 153  Votes: 0  Rate: 0.00]
 Measuring Cable Loss
 Improving measurement accuracy when
lowpower analyzers are used.
[Hits: 542  Votes: 2  Rate: 7.50]
 MiniBeam Geometry Basics
 There is a natural progression of the geometry of
the "minibeams" deriving from the basic yagi, which in itself owes a lot to the common dipole. By Dick Stevens, N1RCT
[Hits: 356  Votes: 0  Rate: 0.00]
 More Information on the EH Antenna
 How EH antennas works and how it has performed.
[Hits: 1960  Votes: 1  Rate: 5.00]
 No Tuner Antenna System
 Article on resonant antennas systems by KA3MRX
[Hits: 241  Votes: 1  Rate: 7.00]
 NVIS Propagation concept
 Army Field Manual 2418 Appendix M with Graphics
[Hits: 2366  Votes: 12  Rate: 8.92]
 Optimizing Inductors
 While intended mainly for antenna loading coils, this article also applies to other resonant systems, such as amplifier tank circuits.
[Hits: 378  Votes: 1  Rate: 10.00]
 Passive antenna reradiators
 Passive Antenna Reradiators to function as Q Multipliers
[Hits: 208  Votes: 1  Rate: 5.00]
 Petlowany Antennas by K6NO
 WorldRadio Article on Petlowany antennas base on this principle: if a length of wire is wound into a spiralshaped 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: 2484  Votes: 8  Rate: 6.75]
 Phasing of two identical antennas
 Phased Spaced Active Whips and Broadband Loops by WA1ION
[Hits: 82  Votes: 0  Rate: 0.00]
 Phasing Systems
 Antennas, Standard Delay Line Systems, Crossfire Phasing or Hybrids
[Hits: 478  Votes: 1  Rate: 2.00]
 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: 351  Votes: 0  Rate: 0.00]
 Portable antenna comparison
 Common antennas for portable use compared. A vertical antenna, a dipole antenna an inverted V and a fan dipole all at same height.
[Hits: 551  Votes: 0  Rate: 0.00]
 QEX Ground System Experiments
 N6LF series of experiments on ground systems for vertical antennas. That series of reports was converted, with some modifications, into a series fo seven articles in QEX magazine.
[Hits: 462  Votes: 1  Rate: 8.00]
 Quad or Loop antenna
 Information about quad and loop antennas, matching tips, differences on polarization and impedence by PA0FRI
[Hits: 712  Votes: 3  Rate: 4.33]
 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: 1446  Votes: 2  Rate: 7.00]
 Radial System Design
 Are the lengths of antenna radials related to the height of a vertical? By N6LF
[Hits: 623  Votes: 1  Rate: 5.00]
 Radial systems and ground
 Radial systems for elevated and ground mounted vertical antennas by SteppIR
[Hits: 1832  Votes: 4  Rate: 8.25]
 Radiation and fields
 Electric Fields, magnetic fields, electromagnetic fields, losses, fresnel zone, nearfield and farfield
[Hits: 316  Votes: 1  Rate: 10.00]
 Radiation and scattering
 Basic antenna theory, Antenna directivity and effective area, Antenna arrays
[Hits: 2878  Votes: 2  Rate: 10.00]
 Radiation Characteristics
 Tailoring Patterns for HF Verticals
[Hits: 103  Votes: 0  Rate: 0.00]
 Radio  The Easy Way
 PDF article on Antenna of non resonant lenght, line attenuation, the transmatch, baluns by WB5IIR
[Hits: 147  Votes: 0  Rate: 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: 5015  Votes: 2  Rate: 4.00]
 Receiving Loop Theory  N4YWK
 Sensitivity of multi turn receiving loops
William E. Payne, N4YWK
[Hits: 549  Votes: 1  Rate: 1.00]
 Restricted Space Antennas Notes
 W5ALT Antenna notes for a dummy dedicated to restricted space antennas
[Hits: 122  Votes: 0  Rate: 0.00]
 RMS power
 How it's misused and misunderstood, and why it's not useful.
[Hits: 432  Votes: 3  Rate: 6.67]
 Selecting a MultiBand Vertical
 Choosing a vertical antenna. Buying guide to amateur radio HF vertical antennas by Bencher inc
[Hits: 1060  Votes: 0  Rate: 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: 196  Votes: 0  Rate: 0.00]
 Singlestub matching
 Singlestub matching of transmission lines to loads
A worked example
[Hits: 330  Votes: 5  Rate: 4.00]
 Sloper Antenna Tests
 Mark Connelly  WA1ION tests on slooper antennas
[Hits: 2632  Votes: 1  Rate: 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: 711  Votes: 0  Rate: 0.00]
 Smart Antennas Tutorial
 Smart antennas or the adaptive antenna array and smart antenna technology used with SDR, cognitive radio, MIMO, and other new technologies.
[Hits: 185  Votes: 0  Rate: 0.00]
 Smith Chart Basics
 Smith Chart it is a graphic tool for solving transmission lines problems
[Hits: 167  Votes: 1  Rate: 10.00]
 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: 1638  Votes: 1  Rate: 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: 292  Votes: 1  Rate: 5.00]
 Stacking for 50MHz
 Summary of discussion on stacking antennas on six meter band
[Hits: 983  Votes: 1  Rate: 10.00]
 Stealth Attic Antennas for DX and Contesting?
 Considerations on using attic antennas for dx anc contesting operations.
[Hits: 205  Votes: 1  Rate: 8.00]
 SteppIR Element Length Study
 Four EZNEC studies for the 3 element SteppIR for 17 meter
[Hits: 634  Votes: 3  Rate: 6.00]
 Switching Solutions
 Creative Contest/DX Station Switching Solutions by W7VP on NCJ
[Hits: 58  Votes: 0  Rate: 0.00]
 SWL antenna distribution system
 A methodology for connecting multiple LF/MF/HF receivers to a single antenna via readily available and inexpensive 75ohm TV cable. Custom made baluns and splitters provide impedance matching and prevent interaction between receivers.
[Hits: 1183  Votes: 1  Rate: 8.00]
 SWR Table
 Power loss table by SWR values
[Hits: 100  Votes: 1  Rate: 8.00]
 SWR with nonresonant antennas
 SWR with multiband and nonresonant antennas
[Hits: 652  Votes: 2  Rate: 6.50]
 TMatch Construction
 The TMatch with its balanced feed point is one method of feeding a Balanced Dipole.
[Hits: 509  Votes: 0  Rate: 0.00]
 Techlib.com Antennas
 Introduction to homebrewing antenna, for AM FM band reception
[Hits: 73  Votes: 0  Rate: 0.00]
 Testing with the Loop Antenna
 NRSC AM bandwidth measurements with the loop antenna
[Hits: 414  Votes: 0  Rate: 0.00]
 The Coaxial Line
 Impedance matching, Transmission Lines, Characteristic Impedance, VSWR & Mismatch and Antenna Losses
[Hits: 674  Votes: 0  Rate: 0.00]
 The CrossedField 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 CrossedField Antenna
[Hits: 1304  Votes: 2  Rate: 4.00]
 The decibel
 dB the measure of performance explained at radioworks.com
[Hits: 252  Votes: 0  Rate: 0.00]
 The DK7ZBMatch for Yagis
 Simple, easy to built match developed in 1995 for Yagis with resistitive loads of 12.5, 18 and 28 Ohm.
[Hits: 3113  Votes: 7  Rate: 5.86]
 The Ferrite Rod Antenna
 Theory of the ferrite rod antenna
[Hits: 575  Votes: 1  Rate: 1.00]
 The humble Yagi or should that be Uda
 Article about YagiUDA antennas
[Hits: 140  Votes: 1  Rate: 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: 331  Votes: 1  Rate: 10.00]
 The mark 2 Crossfield Antenna
 The mark 2 Crossfield Antenna was described in Sprat 76 by Alec, GD3HQR
[Hits: 485  Votes: 0  Rate: 0.00]
 The mystery of radials
 Effect of radials on the efficiency of antennas.
[Hits: 125  Votes: 0  Rate: 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: 403  Votes: 1  Rate: 10.00]
 The Quarter Wave Sloper or the InvertedV Dipole
 A question that seems to be asked nearly everyday is, which is best, the quarter
wave sloper or the invertedV dipole? PDF File by AD communications.
[Hits: 4470  Votes: 10  Rate: 6.00]
 The Smith Chart
 Understanding smith charts, an introduction to smith charts and it's advantages.
[Hits: 185  Votes: 2  Rate: 7.00]
 To Trap or Not to Trap
 An interesting article on traps, pros and cons of trapping by W4RNL
[Hits: 3445  Votes: 2  Rate: 5.50]
 Trap antennas, coaxial trap, coax dipole antenna loss resistance
 Testing and comparison of traps and trap antennas
[Hits: 2849  Votes: 4  Rate: 9.50]
 Tuning Your Antenna
 Getting the best performance from your investment
[Hits: 990  Votes: 1  Rate: 8.00]
 Types of multiband antennas
 Types of multiband antennas for the HF bands, from the horizontal end fed wire, to g5rv, log periodics, trap dipoles, vee beams and rhombic antennas.
[Hits: 8993  Votes: 10  Rate: 5.80]
 Understanding Antennas For The NonTechnical 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: 630  Votes: 2  Rate: 5.50]
 Understanding Radiation Patterns
 Understanding and using antenna radiation patterns
[Hits: 319  Votes: 0  Rate: 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: 7842  Votes: 8  Rate: 4.75]
 Understanding SWR by Example
 Take the mystery and mystique out of standing wave ratio QST Article by K5DVW
[Hits: 122  Votes: 0  Rate: 0.00]
 Using Delta Matching on HF Beams
 Using delta match with HF antennas design
[Hits: 4938  Votes: 4  Rate: 3.50]
 Using MMANAGAL for antenna modelling
 G0KYA MMANAGAL presentation and samples
[Hits: 96  Votes: 0  Rate: 0.00]
 Vertical amtennas among the trees
 Experiments on vertical antennas among the trees by ik2egl
[Hits: 567  Votes: 0  Rate: 0.00]
 Vertical and Above
 Using vertical on six meters band and above, by Peter Schleuss, HB9RUZ
[Hits: 205  Votes: 0  Rate: 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: 2792  Votes: 15  Rate: 3.92]
 Vertical stacking of HF antennas
 Benefits of stacking two HF antennas vertically
[Hits: 180  Votes: 0  Rate: 0.00]
 Vertical vs Horizontal antenna separation
 Isolation vs antenna separation an interesting article by WA6ILQ
[Hits: 651  Votes: 4  Rate: 5.00]

