Electromagnetic Field Animations

Introduction

Antenna - Electromagnetic Fields

Field Relationship

Example:

Calculate field inside waveguide

Calculate full aperture field

WR-90

WR-90 E&H

WR-90 open

WR-90 rim

Near Field  ß Fourier à Far Field

E x H

Coffee can

Coffee rim

Interference from multiple sources

Feed with two sources

Penny

Reduce sidelobes from edge currents

VE4MA

VE4MA rim

Chaparral stock

Chaparral flush

W2IMU

W2IMU dual-mode feed -
very small edge current

G3PHO

Bad IMU

Clavin
 74

Diagonal Horns

No flare

1.4, 14

1.4, 30

1.4, 60

Diagonal rim

1.85, 30

1.85, 60

Flared horns

Conical

Conical rim

DSS

AT-68/U

Reverse feeds

Penny

Pro

DC3QS

30 mm

diffraction

60 mm

Rim

Phase error

Waveguide dipole

Clavin ‘54

Other feeds

Primestar vertical

Primestar horizontal

E-plane

H-plane

corrugations

Multiband feeds

W5ZN at 10

W5ZN at 24

W5ZN choke 10

W5ZN choke 24

2 and 5 experiment

3 and 10 experiment at 3456

3 and 10 experiment at 10 GHz

SUMMARY

Slide 68

Slide 69

W1GHZ favorite feeds