These websites contain information relating to the design of antennas. There is a variety of design notes, design service providers, and some design software. Please consider RF Cafe advertisers first, since they make this resource possible.
2.4GHz Broadband Helical Antenna | wireless.org.au/~jhecker
Concise instructions on making a broadband helical antenna for 2.4GHz use, by Jason Hecker.
2.4GHz Vertical Collinear Antenna for 802.11 Applications | nodomainname.co.uk/Omnicolinear/2-4collinear.htm
By Brian Oblivion and Capt.Kaboom modified by Richard A Wenner.
802.11b Homebrew WiFi Antenna Shootout | turnpoint.net/wireless/has.html
By Gregory Rehm.
AC6V's Homebrew Antenna Links | ac6v.com/antprojects.htm
Numerous links for antenna theory & basics.
Antennas Application Note | ham-radio.com/n6ca/50MHz/50appnotes/50ants.html
From N6CA, ham-radio.com.
Antennas: Design, Application, and Performance | linxtechnologies.com/documents/AN-00500.pdf
Application note from Linx Technologies.
Antenna Design Freeware Page | myerseng.com/download.html
Antenna Design Tutorial | micrel.com/_PDF/App-Notes/an-23.pdf
Application note from Micrel, by Tom Yestrebsky.
Antenna Diplexer | radio-electronics.com/info/antennas/diplexer/antenna-rf-diplexer.php
Overview, summary, tutorial about the basics of an antenna diplexer or RF diplexer used for purposes including enabling a single RF antenna to be used by multiple transmitters. From radioelectronics.com.
Antenna Directivity and Gain | radio-electronics.com/info/antennas/basics/directivity_gain.php
Overview, summary, tutorial about the basics of RF antenna directivity 9aerial directivity) and gain including isotropic radiators, polar diagrams and antenna dBi figures and antenna dBd figures. From radioelectronics.com.
Antenna Elmer | elmerhamlet.com
Information about wire antennas as well as directional beams, from The Elmer HAMlet.
Antenna Feed Impedance | radio-electronics.com/info/antennas/basics/ant_feed_impedance.php
Overview, summary, tutorial about RF antenna or aerial feed impedance and the importance of matching RF antennas to feeders. Radiation resistance, loss resistance, and efficiency are also detailed. From radioelectronics.com.
Antenna Polarization Control | seaveyantenna.com/catalog/p122/control.pdf
By Seavey Engineering Associates.
Antenna Polarisation or Polarization | radio-electronics.com/info/antennas/basics/polarisation-polarization.php
Overview, summary, tutorial about RF antenna or aerial polarisation and the effect polarization has on RF antennas and radio communications. From radioelectronics.com.
Antenna Resonance and Bandwidth | radio-electronics.com/info/antennas/basics/resonance.php
Overview, summary, tutorial about antenna or aerial resonance and badwidth and the impact of RF antenna resonance and bandwidth on radio communication systems. From radioelectronics.com.
Antenna Software | ac6v.com/antsoftware.htm
Links to antenna design software Compiled By AC6V.
ANTENNAS: Some Rules of Thumb for Beginners |amqrp.org/projects/BeginnerAnts/bgnsant.html Guidelines by James R. Duffey KK6MC/5.
Antenna Theory | antenna-theory.com
A source of knowledge for learning about and understanding antennas. The goal is to present a comprehensive tutorial on antennas. This website will strive to make antennas understandable, without unnecessary complexity.
antenneX | antennex.com
Provides a central place for everyone to readily discuss their experiences with problems and/or successes in this field of radio signals.
Automated Antenna Design | ti.arc.nasa.gov/m/pub/1145h/1145 (Globus).pdf
Evolved antenna technology from NASA.
The Basics of Patch Antennas | orbanmicrowave.com/The_Basics_Of_Patch_Antennas.pdf
Antenna application notes from Orban Microwave Products.
Bluetooth Antenna Modeling Using Micro-Stripes | microstripes.com/e-news/articles/bluetooth.htm
By David Johns Scott Leslie, GE Plastics.
Electromagnetic Waves and Antenna Basics | radio-electronics.com/info/antennas/basics/emwaves.php
An overview, summary, tutorial about the basics of electromagnetic waves and the way in which they affect RF antenna and RF antenna design. From radioelectronics.com.
GreenWave Scientific | greenwavescientific.com
919-876-6220 | Raleigh, NC
Develops unique form, fit and function antennas for unique applications and requirements. Very simply, we design and manufacture antennas unlike any other antennas in the world. Custom designs available.
How To Build A Tin Can Waveguide WiFi Antenna | turnpoint.net/wireless/cantennahowto.html
For 802.11(b or g) Wireless Networks or other 2.4GHz Applications, by Gregory Rehm.
Human-Guided Antenna Design | merl.com/projects/antenna
This project is a joint effort between MERL Technology and Research Laboratories in collaboration with Johosoken and with sponsorship from Denshihon.
ISM-Band and Short Range Device Antennas | focus.ti.com/lit/an/swra046a/swra046a.pdf
This application report discusses antenna fundamentals and the various types of antennas used for short range devices. Fundamentals are presented along with practical design principals. From Texas Instruments.
J-Pole Antenna Design | hamuniverse.com/jpole.html
Design your own J Pole for any band, includes a calculator.
Log Periodic Antenna | fortunecity.com/skyscraper/jolt/345/LogCalc.html
A Java applet which calculates the dimensions and spacings of the elements needed to build a log periodic antenna, given tao, sigma and the lower and upper cutoff frequencies.
Loop Antennas | radioworks.com/nloop.html
800-280-8327 | Portsmouth, VA
Instructional article by Radio Works.
A Microstrip Edge-Fed Patch Antenna with Inset Feed | sonnetusa.com/support/kb.asp?id=266
Application note from Sonnet.
Miniaturized Antenna Design for MIMO Communication Systems | ece.utexas.edu/~rheath/research/mimo/antenna
By Wireless Networking and Communications Group (WNCG).
Multi-Pitch, Multi-Band Helical Antenna | ansoft.com/hfworkshop03/SooLiam_Ooi_Motorola.pdf
By SooLiam Ooi, Motorola Florida Corporate Research Lab.
N4UJW Antenna Design Lab | hamuniverse.com/antennas.html
Antenna project contributions from all over the world - HF, VHF, UHF and more.
New Helix Antenna Design for the Mars Observer Experiment | af9y.com/helix.htm
By Mike Cook - AF9Y.
The Quagi Antenna Turns 30 | commfaculty.fullerton.edu/woverbeck/quagi.htm
By Wayne Overbeck, N6NB.
Simple Gain Antennas for the Beginner | arrl.org/tis/info/pdf/8108032.pdf
From ARRL, by Doug DeMaw, W1FB.
Standard Antenna Terms and Related Formulas | ara-inc.com/PDF-RF/015-standard.pdf
From A.R.A. Antenna Research.
Useful Antenna Design Formulas | seaveyantenna.com/catalog/p124/formulas.pdf
From Seavey Engineering Associates.
VHF / UHF Antenna Design | numatechnologies.com/pdf/an_antenna.pdf
Application note from INGECOM.
Yagi Antenna Design | ipass.net/teara/kq3.html
Experiment with Yagi designs on your computer with YagiCad.