DUAL-BAND ELECTRONIC-BEAM-CONTROL ANTENNA SYSTEM Russian patent published in 2001 - IPC

FIELD: radar engineering. SUBSTANCE: antenna system has phased antenna array operating in radio-frequency band whose waveguide radiators form regular periodic structure and phased antenna array operating in audio-frequency band whose radiators form regular periodic structure; radiators of both arrays form common aperture of antenna system; radiation centers of both arrays are aligned or offset through positioning period of radio-frequency array radiators; radiators of radio-frequency array are integrated to form continuous strips and those of audio-frequency array are placed between strips of radio-frequency array to form rows; positioning periods of audio-frequency array radiators in row are executed in full compliance with value required for desired scanning sector and between rows, in steps of positioning period of radio- frequency array radiator strips. Audio-frequency radiators may be mounted not over entire aperture but so as to form double- and triple-row structure or they may occupy entire aperture; radio-frequency radiators may occupy only central part of aperture or may be randomly offset, or they may be made in the form of shorter H-dipoles with active side of length L₁ and passive one of length L₂, mounted on posts provided on coaxial line sections of length h with symmetrical slits of length L₃; lengths L₁ are to be chosen from formulas given in description of invention. EFFECT: minimized effect of radiation of audio-frequency array on radiation characteristics of radio-frequency one with characteristics of audio-frequency array maintained close to limiting values. 5 cl, 2 dwg