Sumários

Horn antenna

5 junho 2026, 12:00 • Mário Silveirinha

Horn antenna. Far-field properties. Effective area. Optimal horn. 


Problem 17 of set 4.

End of the course.

Field radiated by a uniform rectangular aperture.

2 junho 2026, 16:00 • Mário Silveirinha

Far-field of an aperture (conclusion).

Field radiated by a uniform rectangular aperture. Radiation pattern, directivity, half-power beamwidth. Aperture efficiency.

Problem 20 of set 4.

Aperture antennas. Love's equivalence principle. Fields radiated by an aperture.

1 junho 2026, 14:30 • Mário Silveirinha

Aperture antennas. Love's equivalence principle. Fields radiated by an aperture.

Log-periodic antennas. Spiral antennas.

29 maio 2026, 12:00 • Mário Silveirinha

Log-periodic antennas. Spiral antennas.

Problems 10 and 15, set 4.

Frequency independent antennas. Biconical antenna.

28 maio 2026, 11:30 • Mário Silveirinha

Transformation of fields under a change of scale. Systems invariant under scale transformation. Frequency independent antennas.

Biconical antenna. Radiation pattern, directivity and input impedance.

Problem 14 of set 4.