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Antenna Modeling                                                                              Go to Antenna Page      Go to Next Page

• Antenna Modeling Programs (05-23-2000)
• Notes on Modeling Antenna Elements
• Notes on Modeling and Convergence Testing
• Modeling Loads and Transmission Lines Parts 1-4
• Modeling Trap Antennas
• Preliminary Notes on Trap Placement
• Systematic Trap Modeling
• Why I Use dBi Mostly (6-23-97)
• Some Pitfalls of Careless dBd-ing (6-3-99)
• Getting the Most Out of Antenna Patterns (7-17-97)
• Reading a NEC Deck
• NEC-4 vs. NEC-2 With Stepped-Diameter Correction and Autosegmentation
• Notes on Two Limitations of NEC-4
• Multi-Diameter Dipoles: MININEC vs. NEC-4
• Close-Spaced Wires: MININEC vs. NEC-4
• Notes on Fat-Wire Dipole Convergence
• The Tee-Match: NEC Illusions and MININEC Realities
• Three-Element Yagi Models: Standards of Comparison (6-21-97)
• NEC-2 and NEC-4: Reading Trends with Caution (9-12-98)
• Modeling and Understanding Small Beams (7-25-99)

Practical Antenna Notes: Lower HF (Mainly) Vertical Antennas

• Self-Contained Vertically Polarized Wire Antennas: A Family Album Parts 1-5 (5-15-99)
• Voltage Feeding SCV Loops
• Notes on All-Band Use of Vertical-Plane Deltas
• Verticals Without Vertigo (5-13-99)
• Half-Length 80-Meter Vertical Monopoles: the Best Method of Loading Parts 1-5 (5-12-97)
• Vertical Dipoles and Ground Planes: What Antenna Modeling Reports (9-22-98)
• A Modeling Perspective on "Ground" Planes Parts 1-5 (6-6-97)
• Where Do I Hang My Hat? (10-31-98)
• The 40-Meter 3-Way Special
• 3 Wires = The Whole World (2-5-99)
• A Triangle for the Short Vertical Operator (2-5-99)

Practical Antenna Notes: Lower HF (Mainly) Horizontal Antennas

• Wi're We Using Wire?
• A Note on Wire Size and Material
• The Zig-Zag Dipole-Doublet (01-01-2000)
• Unfolding the Story of the Folded Dipole (03-12-2000)
• Modeling the T2FD (6-7-99)
• Notes on the Terminated Wide-Band "Folded Dipole" (6-1-2000, 7-19-2000)
• The "Ideal" Back-Up Antenna for 80-20 Meters (04-14-2000)
• Notes on All-Band Use of Horizontal-Plane Loops
• Horizontally Oriented, Horizontally Polarized Large Wire Loop Antennas (3-29-99)
• Vertically Oriented Multi-Band Antennas (5-20-2000)
• The All-Band Center-Fed Inverted-L (3-6-99, 6-14-99)
• To Trap or Not to Trap
• Some Notes on NVIS Cloud Burners (3-15-99)
• Vertically Radiating Horizontal Antennas
• The IL-ZX Antenna for 40 Meters
• Notes on Full and Shrunken 40-Meter Quads
• Some Notes on Lower-HF Wire Beams
• Notes on a Wire Beam for 80 and 75 Meters
• A Note on Substituting Wire Elements in Lower HF Arrays (3-10-2000)
• Some Notes on Antenna Bandwidth
• Short Beams and Operating Bandwidth
• Don't Be Phased By Phasing

Practical Antenna Notes: Upper HF (Mainly): Yagis and Relatives

• Horizontal and Vertical Yagi Orientation (10-13-98)
• Lobe Formation With Height Increases in Horizontal Antennas (4-30-99)
• Modeling 6 Long-Boom Yagis (7-20-98)
• What Can We Expect From a 2-Element Beam? Parts 1-5 (5-9-97)
• The Monoband Log-Cell Yagi Revisited Parts 1 to 4 (7-14-2000)
• The G4ZU Bird Yagi
• Coils, Linear Loads, and Capacity Hats: An Overview of Small Loaded Yagis
• Director/Driven Element 2-Element Yagis: Some Ideas for 12 and 17 Meters (7-25-99)
• Using Moxon Rectangles for WARC-Band Antennas
  Part 1: Some 17-12 Meter Ideas (5-1-2000, 8-4-2000)
  Part 2: Some 30-17-12 Meter Ideas (6-1-2000)
• Moxon Rectangles: 10 Items (2-22-2000)
• A Tale of 4 Beams: The X, the Hex, the Square, and the Rect (9-01-2000)
• Yagi Element Diameter Differences Do Make a Difference (07-01-2000)
• I Want to Build a 3-Element Yagi Parts 1-4 (8-1-99)
• Stacking Yagis 3 Items (9-17-99)
• 1-2-3: 1 Boom, 2 Bands, 3 Elements Each (3-7-98)
• Three Forward-Stagger 5-Band Yagis from ON4ANT (8-28-98, 4-18-99, 7-16-99)

Practical Antenna Notes: Upper HF (Mainly): Other HF Arrays and Questions

• Some Model Quads 10 Items (4-2-99, 8-5-2000)
• Calculating the Length of a Resonant Square Quad Loop (3-1-2000, 3-23-2000)
• A Trap Small Quad for 12 and 17 Meters
• LPDA Design and Modeling Data 6 items (10-22-99)
• A 3.5 Octave LPDA of High Potential Performance, But an Antenna that No One Will Build (04-14-2000)
• A 10-Meter LPDA Parts 1-7 (11-21-98)
• The Birdcage Antenna
• The L-Antenna (2-5-99)
• The B-Antenna (2-5-99)
• 17-15-12 and Simple (5-11-99)
• A Vertical Doublet for 30-10 Meters (12-01-99)
• EDZ Beam Update
• Feeding the EDZ
• The Expanded Lazy-H (4-1-99)
• An Almost Universal HF Back-Up Antenna For the Antenna Farm That Has Everything Else (2-12-99)
• Suppose I Could Have Only One Wire Antenna. . . (3-1-2000)
• The Turnstile: An Omni-Directional Horizontally Polarized Antenna (3-6-2000)
• The HB9CV Phased Array and Gain Comparisons
• Horizontal Phased Arrays with Parasitic Directors (8-27-98)
• Tinker Toys for Adults: Some Notes and Ideas on PVC for Antenna Applications (8-29-2000)

Practical Antenna Notes: VHF/UHF (Mainly)

• 2 X 3 = 6 (7-25-97)
• Phased Yagis, EDZ Beams, and Landsdorfer-Sacher Yagis (7-28-99, 9-16-99, 4-10-2000)
• The Half-Square on 2 Meters: Parts 1-3 (4-12-99)
• The Moxon Rectangle on 2 Meters (10-01-99)
• Building a 2-Meter Moxon (11-01-99, 12-18-99)
• Corner Reflectors Revisited: Parts 1-3 (4-18-99)
• Modeling the Dual Rhomboid: Parts 1-3 (8-16-99)
• High-Gain, Wide-Band Yagis for 10, 6, and 2 Meters (9-1-99)
• A 3-Moxon Polling Array for 914 MHz (8-1-2000)

Transmission Lines, Impedance Coupling, and Construction

• 12 Ways to See and Love Your Feeders
• Some (Old) Notes on Home-Brew Parallel Transmission Lines (01-06-2000)
• Values Along a Transmission Line (11-25-98)
• When is a Quarter Wavelength Not a Quarter Wavelength? (2-20-98, 7-15-99)
• Series Matching: A Review (2-5-99)
• Voltage, Current, and Impedance Along a Transmission Line
• Whose Afraid of a Little Matching?
• Notes on a Wide-Band 50/75-Ohm Coax Feed System for Low HF Band Dipoles and Vees
• Link-Coupled Antenna Tuners (updated 5-20-99 with EFJ MB photos)
• Link-Coupled Antenna Tuners: A Tutorial: Parts 1 - 5
• Delta, ATUs, and Losses
• An LCL/LC ATU

Continuing Series

• An-Ten-Ten-nas: a series of articles for 10-10 News on antenna basics having special relevance to 10-meter operation.
• Antennas From the Ground Up: a series of articles on antenna basics for Low Down, the journal of the Colorado QRP Club. The emphasis will be largely on lower HF and wire techniques.
• Antenna Modeling: a series of articles on antenna modeling specially prepared for AntenneX. The series aim is to help antenna modelers get the most benefit and least anguish from their programs.
• Amateur Radio Continuing Education: a series of articles prepared over several years for the annual Proceedings of the ARRL National Education Workshop. The pieces range in scope from a full-scale proposal for a technical education series down to using a blackboard more effectively in the classroom. There are also links to some other educational sites.
• Antenna Articles: a personal bibliography