Antenna

Antenna theory, basics,design antenna

Subcategories:

  • Antenna Gain (27)
  • Impedance matching (29)
  • Wind Load (4)
    • Trending Links
    • Antenna basics
      Basics by From Ian C. Purdie, VK2TIP
    • Home-made antennas by we6w
      Various types of antennas by we6w
    • Balun Theory
      The word balun means balanced-unbalanced: it's used to adapt a balanced device to an unbalanced one, read more basic thory on Ununs and Baluns
    • 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 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. The effectiveness of a dipole antenna is influenced by its height above ground, determined by the intended use such as DX work, local communication, directionality, omni-directionality, and feed point impedance. Through EZNEC modeling, the study evaluates a 40-meter dipole's performance at various heights, from 7 to 560 feet. Findings reveal that lower heights enhance omni-directional local communication, while higher placements favor DX work with low-angle radiation. The study emphasizes the importance of defining operational goals to optimize dipole height and performance.
    • 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
    • Antennas Tech reference by K1TTT
      Yagi Antennas, Antenna Materials and more.
    • How to Construct a Dipole
      Basic and illustrated article on building wire dipole antennas. This page is about "how to build a dipole antenna"
    • Antenna Basics
      Article designed to answer basic questions about antennas
    • The Antenna Elmer
      Here you will find information about wire antennas as well as directional beams.
    • W1GHZ Microwave Antenna Book
      The W1GHZ Online Microwave Antenna Book online
    • 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
    • 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
    • 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.
    • Low Noise Antenna Connection
      Reducing noise to your antenna can gain your aerial performance, learn how.
    • 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
    • Amateur Radio Antennas: Ground Theory
      Perfect ground vs. poor ground. What is the difference? How does the ground influence the DX-gain?
    • 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
    • Marine corps antenna handbook
      U.S. Marine Corps in PDF format
    • Hybrid Antennas
      Antennas that use a combination of vertical and horizontal polarisation.
    • G3SEK's Amateur Radio Technical Notebook
      A lot of good informations concerning antennas, filters, moonbounce, and circuitry data.
    • Directional arrays
      About collinear array antennas
    • Loading inductors in mobile antennas
      Mobile antennas, loading coil current, and loaded antennas. efficiency and electrical rules. Loading inductors used in mobile HF antennas.
    • 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.
    • 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.
    • 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.
    • 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.
    • HF Aerial Design
      A novel approach to aerial evaluation with diagrams and graphs by G3CWI
    • Trap antennas, coaxial trap, coax dipole antenna loss resistance
      Testing and comparison of traps and trap antennas
    • Antenna Fundamentals
      Adalet wireless document on antenna basics in a four pages pdf file
    • 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
    • NVIS Propagation concept
      Army Field Manual 24-18 Appendix M with Graphics
    • 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

    • 50MHz Power Splitters

      • Splitting an antenna between two receivers or in use as the phasing harness in stacked ...
      Hits: 3249 | Votes: 6 | Rating: 8

    • A Modern Thermocouple Ammeter

      • Thermocouple ammeters are very rare these days but the job they were perfect for measuring ...
      Hits: 2879 | Votes: 2 | Rating: 6

    • Actual Antenna SWR

      • Easy for calculate formula which could be a wake up call for you The SWR ...
      Hits: 4187 | Votes: 5 | Rating: 4.8

    • All About Antennas

      • A free five part series on antennas that covers many aspects of antennas from radio ...
      By: W8JHD Hits: 1196 | Votes: 3 | Rating: 7.5

    • All HF Band Antennas

      • F6ITV consideration on HF Antennas, from trap wired anternnas, to center feed antennas.
      Hits: 1523

    • Antenna & Mounts

      • Mobile antennas how to install antennas in the roof of a vehicle and how tune ...
      Hits: 5731 | Votes: 7 | Rating: 8.57

    • Antenna basics   pop

      • Basics by From Ian C. Purdie, VK2TIP
      Hits: 39812 | Votes: 37 | Rating: 5.13

    • Antenna Basics

      • Article designed to answer basic questions about antennas
      By: SM0VPO Hits: 10438 | Votes: 20 | Rating: 6.35

    • Antenna Basics : Directional Antennas

      • An article describing basic concepts of antenna radiation and in particular directional antennas like Yagi ...
      By: Scott Hits: 351 | Votes: 1 | Rating: 2

    • Antenna Cable Loss and SWR

      • Calculate Cable Loss from SWR and reverse Text file with only two simply formulas ...
      Hits: 2195 | Votes: 4 | Rating: 4

    • Antenna Diversity

      • Single antenna with multiple polarization for diversity diveristy receivers and propagation effects on signal polarization ...
      Hits: 412

    • Antenna Efficiency

      • K0BG article con antenna efficiency covering topics like radiation resistance coil losses and ground losses ...
      Hits: 460

    • Antenna Fundamentals

      • Adalet wireless document on antenna basics in a four pages pdf file
      Hits: 3131 | Votes: 1 | Rating: 3

    • Antenna Height Theory

      • Antenna mounting height the higher the better Learn how radiation pattern change and decide if ...
      Hits: 1895 | Votes: 5 | Rating: 7.2

    • Antenna Measurements

      • The electrical characteristics of an antenna that are of interest to obtain by direct measurement ...
      Hits: 951 | Votes: 3 | Rating: 4

    • Antenna Measurements

      • Testing of real antennas is fundamental to antenna theory The most common and desired measurements ...
      By: Bevelacqua Hits: 62 | Votes: 1 | Rating: 10

    • Antenna Myths

      • It is best not to know very much than to know a lot of things ...
      Hits: 528 | Votes: 2 | Rating: 4

    • Antenna Selection Made Easy

      • This page will help you answer important questions about antenna selection before you talk to ...
      Hits: 2031 | Votes: 2 | Rating: 3

    • Antenna Theory

      • A discussion of antenna theory by Paul Graham K9ERG one of the better antenna explainations ...
      Hits: 2153 | Votes: 9 | Rating: 8

    • Antenna tips for the beginner

      • Some rules of thumb for beginners with a QRP approach by James R Duffey KK6MC ...
      Hits: 1602 | Votes: 2 | Rating: 10

    • Antenna Transmatch Tips

      • Tips on tuning antennas using Antenna Tuning Units also called ATU This article explains the ...
      Hits: 3317 | Votes: 5 | Rating: 6.4

    • Antenna-Theory.com

      • A source of knowledge for learning about and understanding antennas The goal is to present ...
      By: Pete Hits: 705 | Votes: 3 | Rating: 6.67

    • Antennas 101

      • Dipoles, Doublets and Verticals by Rob May NV5E
      Hits: 802 | Votes: 1 | Rating: 8

    • Antennas : theory and designs

      • Thierry LOMBRY ON4SKY develops in several long articles all you need to know about antennas ...
      By: Thierry LOMBRY, ON4SKY Hits: 9219 | Votes: 11 | Rating: 3.27

    • Antennas for 100 Pound DXpeditions

      • NE1RD interesting publication published online about homebrewing antennas for dx peditions or portable use ...
      Hits: 2479 | Votes: 3 | Rating: 7.33

    • Antennas for Limited Spaces

      • In this article you can find solutions to the problem of keeping your ham radio ...
      Hits: 590 | Votes: 1 | Rating: 1

    • Azimuth Radiation Patterns

      • Below VHF the change in the radiation characteristics of an antenna will change considerably from ...
      Hits: 822 | Votes: 1 | Rating: 10

    • Balun Theory   pop

      • The word balun means balanced unbalanced it s used to adapt a balanced device to ...
      By: g4urh Hits: 38207 | Votes: 34 | Rating: 6.59

    • Basics of antennas

      • The current the voltage the impedance the bandwidth the polarization and how the earth influences ...
      Hits: 703

    • Coax Antennas

      • Amateur Radio Coaxial Antennas by G3TXQ
      Hits: 399

    • Coax Cable Loss

      • Table representing loss of Coax Cables in db per 100ft.
      Hits: 2233 | Votes: 4 | Rating: 4.75

    • Coaxial antennas

      • G3TXQ study on coaxial cable demonstrate that it can reduce an element s length by ...
      Hits: 1293 | Votes: 1 | Rating: 10

    • Common-Mode Noise

      • Receiving Common Mode Noise shows how lack of a balun can contribute to system noise ...
      Hits: 2095 | Votes: 4 | Rating: 8.5

    • Conductors for HF Antennas

      • Putting up an antenna for the low bands What kind of wire will you use ...
      Hits: 2287 | Votes: 4 | Rating: 9.25

    • Crossed Field Antenna

      • The Crossed Field Antenna CFA is one of the applications of Correction of Maxwell s ...
      By: Dr. Fathi Kabbary Hits: 2314 | Votes: 5 | Rating: 2.8

    • Cubical Quad Antenna

      • Let s explore the cubical quad antenna or quad and see what it really is ...
      Hits: 1608 | Votes: 3 | Rating: 1.33

    • Designing Vertical Aerials

      • If you want to design vertical antennas you can find all theory and formulas used ...
      By: GW6ITJ Hits: 577

    • Dipole Height

      • How High should my Dipole be Dipole Antennas and the effect of height above ground ...
      By: AA3RL Hits: 20518 | Votes: 25 | Rating: 5.57

    • Dipoles versus Verticals

      • One of the classic arguments in amateur radio is whether a dipole or vertical is ...
      Hits: 491

    • Do You Need an Antenna Tuner

      • Maybe yes maybe no It all depends on the type of antenna and feed line ...
      Hits: 23000 | Votes: 12 | Rating: 4.58

    • Elevation Angles

      • Importance of elevation angles on long distance communications and relation of reception probability with the ...
      By: ON9CVD Hits: 236

    • Errante's capacitive RF Grounding

      • This system demonstrates that no galvanic coupling to earth is needed for a proper RF ...
      By: Francesco Errante Hits: 493 | Votes: 1 | Rating: 10

    • Feeder Radiation

      • Connecting centre fed antennas dipoles yagis rhombics loops to coaxial cable unless care is taken ...
      Hits: 1832 | Votes: 4 | Rating: 8

    • From Transmitter to Antenna

      • A collection of articles on the subject of impedance impedance matching and high frequency power ...
      Hits: 1163

    • Ground / Radial Systems

      • Guide to ground mounting antennas notes on efficiency elevated installations metal towers and masts other ...
      By: Bencher Hits: 1158 | Votes: 1 | Rating: 10

    • Ground Problems

      • Collection of articles about ground systems
      Hits: 1268 | Votes: 2 | Rating: 8.5

    • Grounding system

      • Perhaps one of the most over looked aspects of setting up a listening post is ...
      Hits: 13192 | Votes: 12 | Rating: 4.66

    • Height versus take off angle

      • One of the most important factor for DXers although many are not aware of this ...
      By: DX-Antennas.com Hits: 579

    • HF Aerial Design

      • A novel approach to aerial evaluation with diagrams and graphs by G3CWI
      Hits: 3200 | Votes: 11 | Rating: 7.27

    • HF Antennas 101

      • Here are 10 tips and truisms that every ham should know about antennas by W20QI ...
      Hits: 827

    • HF insulation, the pitfalls

      • Although insulation may seem relatively insignificant in the larger picture on it depends the quality ...
      Hits: 542

    • How does an Antenna work? - Video

      • The video delves into the fascinating science behind antennas which are crucial for receiving and ...
      By: Lesics Hits: 167 | Votes: 1 | Rating: 9

    • How to Construct a Dipole

      • Basic and illustrated article on building wire dipole antennas This page is about how to ...
      Hits: 10604 | Votes: 20 | Rating: 6.55

    • How's Your SWR?

      • Chart showing how SWR effects how much power you actually radiate from your antenna ...
      Hits: 1010 | Votes: 1 | Rating: 7

    • Hybrid Antennas

      • Antennas that use a combination of vertical and horizontal polarisation.
      Hits: 4718 | Votes: 2 | Rating: 6.5

    • Idiot's guide to antennas

      • A very basic guide to antennas concept Explain the usage of dummy load basic antennas ...
      Hits: 1388 | Votes: 1 | Rating: 10
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  • Electronics
  • Grounding
  • Radio Frequency Interference
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