Abstract
Directivity patters of some antenna systems depend on duration of radiated microwave pulses. It is shown that for large enough twodimensional systems the shortening of pulses leads to suppression of side lobe radiation. We propose to use a novel for two-dimensional antenna systems parameter - a correlation length which is useful for estimation of pulse shortening influence on antenna pattern. Correlation length depends both on the pulse duration and direction of radiation. The effect of side lobes suppression can be used for estimation of pulse duration.
Highlights
Recent advances in synchronisation of high power generators [1,2] open new opportunities in development of their arrays with record radiation pulse power
In the paper we consider such effects in two-dimensional antenna systems and introduce a correlation length which is a useful parameter for estimation of short pulse effect on radiation patterns
Let us assume that microwave generators form planar array consisting of M columns and N rows and each generator radiates electromagnetic field with the structure of the fundamental Gaussian beam with linear polarization:
Summary
Recent advances in synchronisation of high power generators [1,2] open new opportunities in development of their arrays with record radiation pulse power. The extreme power of such generators (of the order of 108 – 109 W) requires development of specific multichannel antenna systems. It means that the distance between channels in the arrays of high-power generators are much greater than wavelength and side lobe levels in array directivity patters are high (see [1,2] for instance).
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