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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.
    • Antennas basics - An antenna study guide by NZART, cover basic topics like dipoles, wave lenght calculation, baluns, beams, dummy loads, and measurements.
    • 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
    • Basic Antenna Theory - Basic antenna theory by sub-TV
    • 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 multi-band 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 transceiverís 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.
    • Amateur Radio Antennas: Ground Theory - Perfect ground vs. poor ground. What is the difference? How does the ground influence the DX-gain?
    • 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
    • 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
    • Antenna & Mounts - Mobile antennas, how to install antennas in the roof of a vehicle and how tune antennas.
    • Using Delta Matching on HF Beams - Using delta match with HF antennas design
    • Dipole Calculation - Determining your proper length for the open half-wave dipole antenna
    • The Quarter Wave Sloper or the Inverted-V Dipole - 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.
    • 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
    • Coax velocity factor - Coax Cables velocity factor article in pdf format
    • 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.
    • Marine corps antenna handbook - U.S. Marine Corps in PDF format
    • To Trap or Not to Trap - An interesting article on traps, pros and cons of trapping by W4RNL
    • 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 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.
    • Trap antennas, coaxial trap, coax dipole antenna loss resistance - Testing and comparison of traps and trap antennas
    • Radiation and scattering - Basic antenna theory, Antenna directivity and effective area, Antenna arrays
    • 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.
    • Sloper Antenna Tests - Mark Connelly - WA1ION tests on slooper 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
    • 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
    • K-FACTOR Table & Chart - Determine the K-Factor used as a multiplier when constructing half-wave antennas.
    Alphabetical
        Result Page:  [<<] 1 2 3 4 5 [>>]
    • NVIS Propagation concept - Army Field Manual 24-18 Appendix M with Graphics
      [ Hits: 2530 | Votes: 12 | Rating: 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: 405 | Votes: 1 | Rating: 10.00 ]
    • Passive antenna re-radiators - Passive Antenna Re-radiators to function as Q Multipliers
      [ Hits: 232 | Votes: 1 | Rating: 5.00 ]
    • Phasing of two identical antennas - Phased Spaced Active Whips and Broadband Loops by WA1ION
      [ Hits: 219 | Votes: 0 | Rating: 0.00 ]
    • Phasing Systems - Antennas, Standard Delay Line Systems, Crossfire Phasing or Hybrids
      [ Hits: 641 | Votes: 1 | Rating: 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: 366 | Votes: 0 | Rating: 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: 590 | Votes: 0 | Rating: 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: 529 | Votes: 1 | Rating: 8.00 ]
    • Quad or Loop antenna - Information about quad and loop antennas, matching tips, differences on polarization and impedence by PA0FRI
      [ Hits: 747 | Votes: 3 | Rating: 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: 1511 | Votes: 2 | Rating: 7.00 ]
    • Radial System Design - Are the lengths of antenna radials related to the height of a vertical? By N6LF
      [ Hits: 658 | Votes: 1 | Rating: 5.00 ]
    • Radial systems and ground - Radial systems for elevated and ground mounted vertical antennas by SteppIR
      [ Hits: 1900 | Votes: 4 | Rating: 8.25 ]
    • Radiation and fields - Electric Fields, magnetic fields, electromagnetic fields, losses, fresnel zone, nearfield and farfield
      [ Hits: 330 | Votes: 1 | Rating: 10.00 ]
    • Radiation and scattering - Basic antenna theory, Antenna directivity and effective area, Antenna arrays
      [ Hits: 2907 | Votes: 2 | Rating: 10.00 ]
    • Radiation Characteristics - Tailoring Patterns for HF Verticals
      [ Hits: 118 | Votes: 0 | Rating: 0.00 ]
    • Radio - The Easy Way - PDF article on Antenna of non resonant lenght, line attenuation, the transmatch, baluns by WB5IIR
      [ Hits: 168 | 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: 5491 | Votes: 3 | Rating: 3.33 ]
    • Receiving Loop Theory - N4YWK - Sensitivity of multi turn receiving loops William E. Payne, N4YWK
      [ Hits: 559 | Votes: 1 | Rating: 1.00 ]
    • Restricted Space Antennas Notes - W5ALT Antenna notes for a dummy dedicated to restricted space antennas
      [ Hits: 379 | Votes: 0 | Rating: 0.00 ]
    • RF Measurement on W3EDP antenna - RF Current measurements on a Long Wire W3EDP antenna
      [ Hits: 122 | Votes: 0 | Rating: 0.00 ]
    • RMS power - How it's misused and misunderstood, and why it's not useful.
      [ Hits: 441 | Votes: 3 | Rating: 6.67 ]
    • Selecting a Multi-Band Vertical - Choosing a vertical antenna. Buying guide to amateur radio HF vertical antennas by Bencher inc
      [ Hits: 1218 | 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: 215 | Votes: 0 | Rating: 0.00 ]
    • Single-stub matching - Single-stub matching of transmission lines to loads A worked example
      [ Hits: 364 | Votes: 6 | Rating: 4.00 ]
    • Sloper Antenna Tests - Mark Connelly - WA1ION tests on slooper antennas
      [ Hits: 2817 | 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: 739 | Votes: 0 | Rating: 0.00 ]
    • Small High-Efficiency Loops - Article about small loop antennas by W5QJR published on QST 6-86
      [ Hits: 155 | Votes: 0 | Rating: 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: 267 | Votes: 0 | Rating: 0.00 ]
    • Smith Chart Basics - Smith Chart it is a graphic tool for solving transmission lines problems
      [ Hits: 182 | Votes: 1 | Rating: 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: 1683 | 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: 320 | Votes: 1 | Rating: 5.00 ]
    • Stacking for 50MHz - Summary of discussion on stacking antennas on six meter band
      [ Hits: 1016 | Votes: 1 | Rating: 10.00 ]
    • Stacking yagis on a single tower - How to stack different band yagi antenna in a single tower
      [ Hits: 121 | Votes: 0 | Rating: 0.00 ]
    • Stealth Attic Antennas for DX and Contesting? - Considerations on using attic antennas for dx anc contesting operations.
      [ Hits: 234 | Votes: 1 | Rating: 8.00 ]
    • SteppIR Element Length Study - Four EZNEC studies for the 3 element SteppIR for 17 meter
      [ Hits: 681 | Votes: 3 | Rating: 6.00 ]
    • Switching Solutions - Creative Contest/DX Station Switching Solutions by W7VP on NCJ
      [ Hits: 74 | 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: 1204 | Votes: 1 | Rating: 8.00 ]
    • SWR - Power loss calculation - How is your SWR - determine the power loss to expect for a given SWR, includes an excel spreadsheet by n3ujj
      [ Hits: 144 | Votes: 2 | Rating: 7.50 ]
    • SWR Table - Power loss table by SWR values
      [ Hits: 180 | Votes: 1 | Rating: 8.00 ]
    • SWR with non-resonant antennas - SWR with multiband and non-resonant antennas
      [ Hits: 705 | Votes: 2 | Rating: 6.50 ]
    • T-Match Construction - The T-Match with its balanced feed point is one method of feeding a Balanced Dipole.
      [ Hits: 535 | Votes: 0 | Rating: 0.00 ]
    • Techlib.com Antennas - Introduction to homebrewing antenna, for AM FM band reception
      [ Hits: 88 | Votes: 0 | Rating: 0.00 ]
    • Testing with the Loop Antenna - NRSC AM bandwidth measurements with the loop antenna
      [ Hits: 431 | Votes: 0 | Rating: 0.00 ]
    • The Coaxial Line - Impedance matching, Transmission Lines, Characteristic Impedance, VSWR & Mismatch and Antenna Losses
      [ Hits: 698 | 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: 1370 | Votes: 2 | Rating: 4.00 ]
      Result Page:  [<<] 1 2 3 4 5 [>>]
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