The W1GHZ Online Microwave Antenna Book
Paul Wade W1GHZ (ex N1BWT) © 1994,1995,1996,1997,1998,1999,2000,2001,2002,2003,2005,2006,2023

Table of Contents

Preface -30 September 1999

Part 1 — Practical Antennas

1.  Antenna Basics - 25 September 1998
2.  Electromagnetic Horn Antennas - March 1998
3.  Metal-plate Lens Antennas - April 1998
4.  Parabolic Dish Antennas - March 1998
5.  Offset-fed Parabolic Dishes -  29 April 1998
Appendix 5A - Common Offset Dishes - October 1999

6.  Feeds for Parabolic Dish Antennas - in progress
6.0 Introduction and Feed Index-  23 September 1999
6.1 Feed Phase and Phase Center - January 1999
6.1.1-4 Phase and Phase Center
6.1.5 Dish Patterns with Focus Error
6.2 Dipole and Wire Feeds - January 1999
6.2.1 Dipole feeds
6.2.2 EIA dual-dipole feeds
6.2.3 Loop feeds
6.3 Circular Waveguide Feeds - January 1999
6.3.1 Coffee-can feeds
6.3.2 WA9HUV -- Coffee-can with flange
6.3.3 VE4MA feed
6.3.4 Chaparral-style feeds

High Efficiency Feeds for Prime-focus Dishes by W1GHZ and WD5AGO   (from EME2006 and Microwave Update 2006)


6.4 Horn Feeds - 30 September 1999
6.4.1 Conical horn feeds
6.4.2 Rectangular horn feeds
6.4.3 Corrugated conical horn feeds
6.5 Dual-Mode Feeds
        Part 1 - 30 September 1999
6.5.1 W2IMU dual-mode feed
6.5.2 W2IMU dual-mode feed examples
Part 2 - 30 September 1999
6.5.3 Diagonal horn
6.5.4 Potter dual-mode conical horn
6.5.5 VK2ALU dual-mode feedhorn
6.5.6 Higher-order multi-mode feeds

Optimized Dual-mode Feedhorns   (from Microwave Update 2006)


6.6 Helical Feeds - Coming soon


Helical Feed Antennas  (from Microwave Update 2002)


6.7 Other Feeds - 14 October 1999
6.7.1 Clavin feed (1974)
6.7.2 Backward or rear feeds
6.7.3 Diffraction
6.7.4 Backward or rear feeds continued

Septum Polarizers and Feeds  (from Microwave Update 2003)



6.8 Radiotelescope Feeds

6.9 Multiband Feeds - 15 May 2000 
Part 1 Multi-band dipole and horn feeds
Part 2 Multi-band feed experiments, Broadband feeds, feed assemblies

Multi-band Feeds ( from Central States VHF Conference 2004)


• W0LMD Dual-Band Patch Feed for L&S band
• WA5VJB LPA Antenna as a Multiband Dish Feed
• G3LTF Dual Band Feed for 23cm and 13 cm
• Improving the AD6FP & AA6IW Dual-band 10&24 GHz Feedhorn for Offset Dishes  (also Microwave Update 2004)


6.10 Multiple-reflector Dishes

Multiple Reflector Dish Antennas ( from EME Conference 2004 and Microwave Update 2004)


Spreadsheet Cassegrain_design.xls

**NEW** Design of Optimized Cassegrain Antenna Systems (from International EME Confernce 2014 & Microwave Update 2023)



Appendix 6A - Parabolic Dish Gain & Beamwidth - October 1999
Appendix 6B - Setting up a Parabolic Dish Antenna -  28 June 2000 
Appendix 6C - Electromagnetic Fields in Feed Antennas -  19 September 2001 
Appendix 6D - Electromagnetic Field Animations -  19 September 2001 

7.  Slot Antennas - 8 July 2001 
Part 1 Waveguide Slot Antennas-  Updated 19 November 2019  
Part 2 Performance Enhancements
Part 3 Other Considerations, Two-dimensional slot arrays
Part 4 Slotted-cylinder and Alford slot antennas
Part 5 Summary and References
Slot Antenna Update 30 May 2002 

**NEW** Historical Paper by Andrew Alford: Long Slot Antennas


8.  Periscope Antenna Systems - 17 May 2000
**NEW** Periscope Antenna Revisited - and Performance Verified (from Microwave Update 2023)

Part 2 — Antenna Measurement
9.  Antenna Range Measurements - April 1998
10.  Antenna Measurements using Sun Noise - April 1998
Part 3 —Computer Analysis of Antennas
11.  Parabolic Dish Feeds - Performance Analysis - March 1998
12.  Pattern Calculation and Phase Analysis - October 1999
13.
Software Page

Downloads:

**NEW** HDL_ANT for Windows - thanks to W3SZ
**NEW** HDL_ANT32 version 4.1 November 2019 - For Windows 7 & 10
HDL_ANT.exe version 3b4 and Source code 3b4 March 2003 - Minor corrections
FEEDPATT.exe
PHASEPAT.exe and PHASEPAT32.exe 32 bit version for Windows XP and later
Periscopegain.xls
Slotantenna.xls ***Updated December 2012***

Conference papers - I've gotten behind on adding new material.  Some of it was described at various conferences, so those papers will be here until I get a chance to rewrite the material and include it. (October 2023)



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