TWO-BAND IRRADIATOR WITH COMBINED MODAL CONVERTER

FIELD: antenna equipment.SUBSTANCE: invention relates to the antenna equipment. Irradiator consists of three parts: the horn, the modal transducer and the exciter, in which the horn consists of a conical section with a regular corrugated surface formed by alternating grooves of different depths, hand H, and the adjacent radial section with a corrugated surface formed by alternating grooves with a constant depth hand with variable depth H, the width s and the period of alternation of the grooves w are constant, and the modal converter is made in the form of a corrugated conical section with an extension angle β=4°, which has 2N+1 grooves of various configurations: N+1 grooves have width s, alternation period w and depth h, and located between them N grooves with a period of alternation w have a variable step-section depth Hwith a constant ratio of the depth of the inner steps to the depth of the outer 1:2. Excitation device is a waveguide structure that includes a corrugated waveguide consisting of a conical and cylindrical sections, while the conical section begins with a circular waveguide, which is a high frequency port, and contains on the side surface diametrically located rectangular waveguides with low-pass filters, which are connected to a summing device, forming a low-frequency port, and connected to a corrugated waveguide with longitudinal slits, and the surface of the corrugated waveguide is formed by grooves of width s, alternation period 0.5 w and depth h, except for the first G grooves, which have a variable depth.EFFECT: technical result consists in the possibility of combining two frequency bands, in expanding the working frequency bandwidth and in expanding the level of cross-polarization radiation.1 cl, 5 dwg Изобретение относится к антенной технике. Облучатель состоит из трех частей: рупора, модового преобразователя и возбуждающего устройства, в котором рупор состоит из конической секции с регулярной гофрированной поверхностью, образованной чередующимися канавками разной глубины, hи Н, и примыкающей к ней радиальной секции с гофрированной поверхностью, образованной чередующимися канавками с постоянной глубиной hи с переменной глубиной Н, при этом ширина s и период чередования канавок w постоянны, а модовый преобразователь выполнен в виде гофрированной конической секции с углом расширения β=4°, которая имеет 2N+1 канавок различной конфигурации: N+1 канавок имеют ширину s, период чередования w и глубину h, а расположенные между ними N канав