Theory

An old post by John Doty about effects of noise in longwire antenna.

How to improve your transmitting antennas for very low solar activity periods vertically polarized 160 ...

Comparison of performance between an indoor random wire versus a magnetic loop using psk31 ...

Radio wave propagation, Principles of transmission lines, Antennas

The use of interference signal cancellation has been around for some time The idea is ...

The following is the third part of a three part guide to help get started ...

This article provides a comprehensive introduction to the decibel dB its logarithmic nature and its ...

The J Pole antenna is an omnidirectional antenna that can be used for base mobile ...

Determine the K-Factor used as a multiplier when constructing half-wave antennas.

If your antenna is fixed in one direction you will notice that your antenna works ...

W4RNL tutorial on on inductively coupled (link-coupled) antenna tuners

Liquid metal antenna using galinstan by Mike Lake KD8CIK

Mobile antennas loading coil current and loaded antennas efficiency and electrical rules Loading inductors used ...

It is not always possible to tackle the sources of local QRM What remains is ...

Article on Yagi and Log periodic antennas by Tom, K1JJ

Loop Antenna Basics and Regulatory Compliance for Short-Range Radio

Reducing noise to your antenna can gain your aerial performance, learn how.

An antenna system is more easily interfaced to a radio when the input reactance at ...

U.S. Marine Corps in PDF format

When the radiation resistance voltage to current ratio of an antenna is the same value ...

It is not very difficult to design and make a helix antenna for a specific ...

Have you measured the SWR at the antenna?

Improving measurement accuracy when low-power analyzers are used.

Army Field Manual 24-18 Appendix M with Graphics

An interesting article focused on defining the optimal lenght and number of ground radials in ...

While intended mainly for antenna loading coils this article also applies to other resonant systems ...

This article focus on the radiation angle of vertical antennas and the fundamentals of electromagnetic ...

Passive Antenna Re-radiators to function as Q Multipliers

Phased Spaced Active Whips and Broadband Loops by WA1ION

Antennas, Standard Delay Line Systems, Crossfire Phasing or Hybrids

While polarisation may seem insignificant compared with other considerations in setting up a communications system ...

Common antennas for portable use compared A vertical antenna a dipole antenna an inverted V ...

Presentation about Practical Antenna Modeling Using the NEC Codes with examples of HF wire antennas ...

This paper by Leif Asbrink SM 5 BSZ presents a practical approach to designing very ...

N6LF series of experiments on ground systems for vertical antennas That series of reports was ...

Information about quad and loop antennas matching tips differences on polarization and impedence by PA0FRI ...

One of the most useful antennas in the repertoire is the Marconi or quarter wave ...

Coax Velocity Factor in Baluns Does it Matter Test results show coaxial cable velocity factor ...

Are the lengths of antenna radials related to the height of a vertical By N6LF ...

Radial systems for elevated and ground mounted vertical antennas by SteppIR

Electric Fields, magnetic fields, electromagnetic fields, losses, fresnel zone, nearfield and farfield

Tailoring Patterns for HF Verticals

The video showcases the setup of a 300 MHz oscillator a 100W radiofrequency amplifier and ...

A small and inexpensive measurement device designed to determine antenna performance across the amateur bands ...

Sensitivity of multi turn receiving loops William E. Payne, N4YWK

W5ALT Antenna notes for a dummy dedicated to restricted space antennas

RF Current measurements on a Long Wire W3EDP antenna

How it's misused and misunderstood, and why it's not useful.

Choosing a vertical antenna Buying guide to amateur radio HF vertical antennas by Bencher inc ...

Magnetism is manifested as a field of vectors that is any point in the magnetic ...

Small antenna what causes loss and how to increase radiation resistance in small antennas A ...

Smart antennas or the adaptive antenna array and smart antenna technology used with SDR cognitive ...

Smith Chart it is a graphic tool for solving transmission lines problems

There is considerable confusion as to what exactly a multiband vertical antenna is The confusion ...

Have wondered why a Smith chart has such strange grid lines Believe it or not ...

Summary of discussion on stacking antennas on six meter band

How to stack different band yagi antenna in a single tower

This is a synopsis of a talk presented to the Sydney VHF DX GROUP by ...

Considerations on using attic antennas for dx anc contesting operations.

How is your SWR determine the power loss to expect for a given SWR includes ...

Power loss table by SWR values

The T Match with its balanced feed point is one method of feeding a Balanced ...

Introduction to homebrewing antenna, for AM FM band reception

NRSC AM bandwidth measurements with the loop antenna

Here you will find information about wire antennas as well as directional beams.

This is a QST Article published in January 1982 by W1FB D Demaw and HH ...

Impedance matching, Transmission Lines, Characteristic Impedance, VSWR & Mismatch and Antenna Losses

dB the measure of performance explained at radioworks.com

Simple easy to built match developed in 1995 for Yagis with resistitive loads of 12 ...

Theory of the ferrite rod antenna

Article about Yagi-UDA antennas

Technical Correspondence QST July 1990 Why even perfect phased array element currents don t produce ...

The mark 2 Crossfield Antenna was described in Sprat 76 by Alec, GD3HQR

Effect of radials on the efficiency of antennas.

Spipral antenna principle by a concept of Bill Petlowany K6NO Tak Antennas are based on ...

A half wave wire that is tuned for resonance on 80m will NOT be resonant ...

A presentation of the Yagi Antennas and other interesting tid bits by Brian Mileshosky The ...

An interesting article on traps, pros and cons of trapping by W4RNL

Testing and comparison of traps and trap antennas

This article published on QEX details measurements of tree conductivity and permittivity at HF frequencies ...

What is antenna polarization and why does it matter Horizontal versus Vertical versus Circular polarization ...

A Book By Jim Abercrombie N4JA Reason for writing this book is to educate you ...

Understanding and using antenna radiation patterns

We worry a lot about Standing Wave Ratio SWR in amateur radio since SWR is ...

Take the mystery and mystique out of standing wave ratio QST Article by K5DVW ...

This article explores the powerful features of AutoEZ as an Excel application working with EZNEC ...

Using delta match with HF antennas design

G0KYA MMANA-GAL presentation and samples

Antenna patterns are all about interference Presentation on wire antennas for HF bands Dipoles horizontal ...

Experiments on vertical antennas among the trees by ik2egl

Using vertical on six meters band and above, by Peter Schleuss, HB9RUZ

Animated quad and yagi comparison You can see antennas characteristics behavior in a vertical plane ...

Benefits of stacking two HF antennas vertically

Isolation vs antenna separation an interesting article by WA6ILQ

Article gives a good overview of the basics and reflects the accepted wisdom from BC ...

Article by VU2GT about VHF antennas, how to evaluate performances and models.

Mounting antenna close each other Distance calculations and tips on setting up antennas by KB9VBR ...

The article discusses the theory of loop aerials for receiving and how they reduce the ...

Many antennas and antenna designers neglect the true cause of loss The major problem using ...

The W1GHZ Online Microwave Antenna Book online