Zhurnal Radioelektroniki - Journal of Radio Electronics. eISSN 1684-1719. 2021. No. 5
ContentsFull text in Russian (pdf)
DOI https://doi.org/10.30898/1684-1719.2021.5.7
UDC 621.396.677
AVERAGE RADIATION PATTERN DIGITAL ANTENNA ARRAY AND A METHOD FOR REDUCING THE AVERAGE LEVEL OF SIDE LOBES
E .N. Mishchenko 1, S. E. Mishchenko 2, N. V. Shatskiy 3
1 Rostov State University of Railways, Narodnogo opochenija sq., 2, Rostov-on-Don 344027, Russia
2 Rostov-on-Don Institute of Radiocommunications, Nansena av., 130, Rostov-on-Don 344010, Russia
3 Mints Radio-Technical Institute, 8 March st., 10/1, Moscow 127083, Russia
The paper was received on April 25, 2021
Abstract. In the development of the existing statistical theory of antennas, new analytical relations are obtained for estimating the average radiation pattern of a digital antenna array. These ratios take into account the variance of rounding errors of the weight coefficients, errors in the amplitude and phase calibration of the antenna, jitter noise and rounding errors of the signal at the output of the analog-to-digital converter. It is shown that most of the factors affect the average level of the side lobes, as in analog antenna arrays. However, the variances of the phase calibration errors and the jitter noise determine the contribution of the new term, which has symmetry in the angular coordinate and has an extremums in the direction of the main beam of the antenna array and in the direction that is mirrored relative to the main beam. It is established that the variances of rounding errors depend on the signal-to-noise ratio and, when performing numerical studies, should be estimated based on the results of experimental studies. It is shown that digital processing in a sliding window reduces the average level of the side lobes by separating the spectral components of the signal and noise.
Key words: average radiation pattern, mean power, digital array antenna, analog-digital converter, random errors in pattern forming scheme, digital processing in sliding window.
References
1. Voskresenskiy D.I., Kanaschenkov A.N., editors. Aktivnie fasirovannie antennie reshetki [Active Phased Array antennas]. Moscow, Radiotehnika Publ. 2004. 488 p. (In Russian)
2. Grigoriev L.N. Tsifrovoe formirovanie diagrammy napravlennosti v fazirovannih antennih reshetkah [Digital Beam Forming in the Phased Array Antennas]. Moscow. Radiotehnika Publ. 2010. 144 p.
3. Kornienko L.G., Shifrin Ja.S. Statistical syntesis of antennas. In: Bahrah L.D., Voskresenskiy D.I., editors. Problemy antennoj tehniki [Problems of Antenna Tehnics]. Moscow, Radio i Svyaz Publ. 1989. P.275-296. (In Russian)
4. Shifrin Ja.S. Voprosy statisticheskoj teorii antenn [Questions of Statistical Antenna Theory]. Moscow, Sovetskoye Radio Publ. 1970. 384 p. 9In Russian)
5. Parker M. Radar Basics. Part 4: Space-time adaptive processing [online]. https://www.eetimes.com/radar-basics-part-4-space-time-adaptive-processing.
6. Ventsel E.S., Ovcharov L.A. Teorija verojatnostey [Probabilities Theory]. Moscow, Nauka Publ. 1969. 368 p. (In Russian)
7. Mishchenko E.N., Mishchenko S.E., Shatskiy N.V. Sposob diagrammoobrazovaniya v priyemnoy tsifrovoy antennoy reshetke.
[Method of Digital Beam Forming in the Digital Antenna Array]. Patent RF No. 2021108461. Allpied 29.03.2021. (In Russian)
For citation:
Mishchenko E N., Mishchenko S.E., Shatsky V.V. Average radiation pattern digital antenna array and a method for reducing the average level of side lobes. Zhurnal Radioelektroniki [Journal of Radio Electronics]. 2021. No.5. https://doi.org/10.30898/1684-1719.2021.5.7 (In Russian)