Dual-frequency combined phased array antenna operating in L- and S-bands

Recently, in connection with the active development of radio engineering systems in the L-, S- and C-bands, phased antenna arrays are often used as antennas. In particular, one of the requirements for such systems is to ensure the operation of an antenna with a single radiating aperture in several operating frequency ranges, for which they use multi-frequency combined antenna arrays. The construction of such antennas has been repeatedly considered in various sources, however, the options for the constructive implementation of combined phased arrays, which have high serial suitability, are not widely covered.

Such antenna systems provide a significant reduction in the weight and overall dimensions of the equipment compared to the option of individual antennas for each of the operating frequency ranges. At the same time, the most significant problem that arises in the development of combined phased arrays is the creation of its system of emitters, the characteristics of which determine the parameters of the entire antenna system.

When developing a system of combined phased array emitters, it is necessary to take into account the mutual influence

emitters of one range to another, which leads to distortion of the radiation patterns of single emitters in the composition of the phased antenna arrays for each of the ranges, and, as a result, deterioration in the electrical characteristics of the headlamp. In addition, the system of combined phased array emitters has a complex design, which leads to the complexity of its implementation and high cost.

The paper considers a variant of a system of combined phased array emitters operating in the L- and S-bands of frequencies, which has multiple operating frequencies and the same linear polarization of the field. The requirements for the system of combined emitters necessary to obtain the specified characteristics of the phased array are substantiated. The achieved characteristics for both ranges are given, taking into account the mutual influence of emitters of different ranges on each other.