Abstract
The results of a constructively simple high-tech small-sized integrated element of the Ka-band electric beam scanning reflective phased array antenna (PAA) development are shown. Beam scanning sector of the phased array antenna is up to 60 by both coordinates. The PAA element is based on the Faraday type waveguide ferrite phase shifter, which works on the circular polarized electromagnetic waves. More than 30000 PAA elements has been produced, 100% control and statistical data processing of their main characteristics has been carried out. Graph for initial phases and steepness of linearized phase characteristics, medium and maximum losses of PAA elements are performed. Average value of the average deviation for parameters which is important for PAA and the beam control system design have been determined. The developed element can be used in PAA which have different sizes, forms and sectors of electrical beam scanning. Small deviations in the characteristics of PAA elements from the linearized characteristics indicate the high quality of the production and their identity, which makes it possible to create PAA without taking into account the real individual parameters of mass-produced PAA elements.
Highlights
IntroductionTo the early 1970s, microwave radio technology in the world had made great strides in the development of ferritic microwave devices, in the study of waveguide-based array antenna, taking into account the mutual influence of phased array antenna (PAA) elements, PAA excitation systems and phase shifter’s control systems [1, 2, 3, 4]
To the early 1970s, microwave radio technology in the world had made great strides in the development of ferritic microwave devices, in the study of waveguide-based array antenna, taking into account the mutual influence of phased array antenna (PAA) elements, PAA excitation systems and phase shifter’s control systems [1, 2, 3, 4].The beginning of particular microwave band PAA design for air defense systems can be dated to 1976, when work on the C300-PMU and Patriot systems began simultaneously in the USSR and the USA
There are a lot of requirements to waveguide ferrite phase shifters for PAA elements such as: -Working with electromagnetic waves with predetermined polarization; -Small microwave losses; -High switching speed and low remagnetization energy; -Stability of the initial phase and phase shifting; -"Reception-transmission" mode reciprocity; -Phase characteristics’ linearity with all level of the control signal; -Small dimensions and mass; -Processability of the construction; -Good reproducibility in mass production conditions; -Resistance to mechanical and climatic influences
Summary
To the early 1970s, microwave radio technology in the world had made great strides in the development of ferritic microwave devices, in the study of waveguide-based array antenna, taking into account the mutual influence of PAA elements, PAA excitation systems and phase shifter’s control systems [1, 2, 3, 4]. The beginning of particular microwave band PAA design for air defense systems can be dated to 1976, when work on the C300-PMU and Patriot systems began simultaneously in the USSR and the USA. Both systems had common things like purpose, waveguide ferrite phase shifters (WFPS) using, spatial excitation, monoimpulse swaddling, element by element phasing, aperture size, etc. In centimetre and millimeter wavelengths multi-element phased array antennas with a number of elements more than 103 are usually designed as pass or reflective type with spatial excitation [6]. In a number of practical applications, the choice of reflective type PAA design is more preferable the pass type
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