Premium
Radiators for microwave biological effects research—waveguide slot array with constant radiation intensity
Author(s) -
Hagmann Mark J.,
Gandhi Om P.
Publication year - 1977
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs012i06sp00097
Subject(s) - optics , microwave , horn antenna , radiation pattern , slot antenna , radiation , physics , intensity (physics) , waveguide , slotted waveguide , antenna (radio) , electromagnetic radiation , radiant intensity , acoustics , telecommunications , computer science , quantum mechanics
A longitudinal‐shunt slot array with reflectors has been designed, built, and tested. The antenna is easily matched near the design frequency. The radiation pattern has an intensity within ±0.5 dB over a total angle of 15.6° in the H plane and 15.5° in the E plane. Gain is 19.7 dB which is 3.9 dB above that of a horn with a similar work area. By using energy‐absorbing material, it is possible to produce a pattern in which the fields drop suddenly from the nearly constant values to nearly zero.