Monopulse IFF antennas

Monopulse antennas purpose to work in short range interrogators which have monopulse pattern in two axes — in elevation and in azimuth is presented in the paper. The antennas example have been made in microstrip technology (based on dielectric substact). They have flat shape, which is a considerable advantage in many applications. This paper has shown principal problems concerning side lobes compensation in monopulse antennas. Has been discuss parameter’s antenna and also has shown analyses of radiation elements designs. Three different variants of summation-differential circuits have also been shown.