S.P. Skobelev – Dr.Sc.(Phys.-Math.), Leading Research Scientist, PJSC «Radiofizika» (Moscow);  Associate Professor, Moscow Institute of Physics and Technology (State University) E-mail: s.p.skobelev@mail.ru

Comparative analysis of the subarray radiation patterns and element use factor in the limited-scan phased arrays with interwoven and chessboard feeding networks is carried out. It is shown that though the attenuators in the interwoven networks can provide a wider sector of scanning at low level of the array factor grating lobes, their use results in a considerably greater number of the controlled elements necessary for providing specified gain in a specified sector of scan in comparison both with the case of the chessboard networks and with the case of the interwoven networks without the attenuators.

Comparative analysis of the subarray radiation patterns and element use factor in the limited-scan phased arrays with interwoven and chessboard feeding networks is carried out. It is shown that though the attenuators in the interwoven networks can provide a wider sector of scanning at low level of the array factor grating lobes, their use results in a considerably greater number of the controlled elements necessary for providing specified gain in a specified sector of scan in comparison both with the case of the chessboard networks and with the case of the interwoven networks without the attenuators.

1. Mailloux R.J. Phased array antenna handbook. Edition 2nd. Norwood. MA: Artech House. 2005.
2. Skobelev S.P. Phased array antennas with optimized element patterns. Norwood. MA: Artech House. 2011.
3. Petrolati D., Angeletti P., Toso G. A lossless beam-forming network for linear arrays based on overlapped sub-arrays. IEEE Transactions on Antennas and Propagation. 2014. V. 62. № 4. Pt. I. P. 1769−1778.
4. Skobelev S.P. Some Features of the Overlapped Subarrays Built up of Beam-Forming Matrices for Shaping Flat-Topped Radiation Patterns. IEEE Transactions on Antennas and Propagation. 2015. V. 63. № 12. P. 5529−5535.
5. Tanha M.A., Brennan P.V., Ash M., Köhler A., McElwaine J. Overlapped phased array antenna for avalanche radar. IEEE Transactions on Antennas and Propagation. 2017. V. 65. № 8. P. 4017−4026.
6. Skobelev S.P. Comments on «Overlapped Phased Array Antenna for Avalanche Radar». IEEE Transactions on Antennas and Propagation. Accepted for publication.
7. Skobelev S.P., Makeev I.A. Some features of shaping narrow flat-topped radiation patterns by overlapped subarrays in limited-scan waveguide phased array antennas. Proceedings of 11th European Conference on Antennas and Propagation (EuCAP'2017). 19−24 March 2017. Paris (France). P. 1101−1105.
8. Makeev I.A., Skobelev S.P. Analysis and optimization of an array of multimode plane waveguides excited by TM waves in order to form sectorial partial directional patterns. Journal of Communication Technology and Electronics. 2017. V. 62. № 11. P. 1231−1237.
9. Avser B., Frazita R.F., Rebeiz G.M. Interwoven feeding networks with aperture sinc-distribution for limited-scan phased arrays and reduced number of phase shifters. IEEE Transactions on Antennas and Propagation. 2018. V. 66. № 5. P. 2401−2413.
10. Patent 4 041 501 US. 9 August  1977 Limited scan array antenna systems with sharp cutoff of element pattern. Frazita R.F., Lopez A.R., Giannini R.J. 
11. Skobelev S.P. Methods of constructing optimum phased-array antennas for limited field of view. IEEE Antennas and Propagation Magazine. 1998. V. 40. № 2. P. 39−50.
12. Hannan P.W. The element-gain paradox for a phased-array antenna. IEEE Transactions on Antennas and Propagation. 1964. V. 12. № 4. P. 423−433.
13. Kahn W.K. Ideal efficiency of a radiating element in an infinite array. IEEE Transactions on Antennas and Propagation. 1967. V. 15. № 4. P. 534−538.
14. Skobelev S.P. Effectiveness of using non-coupled large-aperture radiators in phased array antennas. Proc. of IX Int. Conf. on Antenna Theory and Techniques (ICATT'2013). 16−20 September 2013. Odessa (Ukraine). P. 232−234.