S. A. Karpukhin1
1 Public Joint Stock Company «Almaz» (Moscow, Russia)

1 SKarpukhin@inbox.ru

When a phased antenna array operate with a wide bandwidth (bandwidth – octave), there are undesirable effects of interaction between radiators, radiators and feeder line, as well as there is an effect of radio signal scattering when passing the interface between the medium of the transmitter and air. These effects significantly deteriorate the antenna performance, weakening the power and, respectively, the transmission range, as well as deteriorating the quality of signal reception.

The most well known phenomena arising from the operation of array elements are: 1) redistribution of currents in the radiators, which leads to distortion of the radio signal waveform; 2) changing the input impedance of each element leads to an increase in the SWR and reflection coefficient, which leads to reflection of energy in the feeder line back to the source; 3) occurrence of incidental main maxima in case of improper placement of emitters in the phased array; 4) a drop in the output power of amplifiers in the output stage of the radar transmitter; 5) increase in the level of side lobes of the directional pattern of the phased antenna array.

The objective of the article is to evaluate the dependence of matching on active and reactive loads and to carry out modeling of optimal conditions for antenna operation, providing the correct matching of feeder line and radiators and ensuring the passage of the interface with the least losses.

The conducted modeling allows to find optimal electrical characteristics (current, voltage, etc.) for proper operation of the phased antenna array at the stage of phased antenna array design.

Karpukhin S.A. Effects of mutual influence of elements of a phased antenna array with wide bandwidth when operating for reception and transmission. Antennas. 2025. № 4. P. 85–92. DOI: https://doi.org/10.18127/j03209601-202504-08 (in Russian)

1. Klimov K.N. Elektrodinamicheskoe modelirovanie volnovodnoj priemnoj antenny s rabochej polosoj chastot oktava. Vestnik vozdushno-kosmicheskoj oborony. 2021. № 1 (29). S. 61–68. (in Russian)
2. Paramonov A.A., Nguen M.V. Raspoznavanie vidov tsifrovoj modulyatsii radiosignalov s ispol'zovaniem mnogozadachnoj nejronnoj seti. Vestnik vozdushno-kosmicheskoj oborony. 2022. № 4 (36). S. 91–97. (in Russian)
3. Karpukhin S.A. Analiz vozniknoveniya pobochnykh glavnykh maksimumov v shirokopolosnykh fazirovannykh antennykh reshetkakh i metody ikh ustraneniya. Vestnik vozdushno-kosmicheskoj oborony. 2023. № 2 (38). S. 77–80. (in Russian)
4. Klimov K.N., Konov K.I. Vliyanie fakela raketnogo dvigatelya na diagrammu napravlennosti bortovoj antenny na aktivnom uchastke traektorii. Vestnik vozdushno-kosmicheskoj oborony. 2024. № 1 (41). S. 65–72. (in Russian)
5. Klimov K.N. Elektrodinamicheskoe modelirovanie antennogo polotna fazovogo pelengatora s rabochej polosoj chastot oktava. Vestnik vozdushno-kosmicheskoj oborony. 2024. № 2 (42). S. 39–54. (in Russian)
6. Karpukhin S. Electrodynamic modeling of a four-section phased antenna array with a wide bandwidth and provision of this distributed power supply. 2024 International Seminar on Electron Devices Design and Production (SED). Sochi. 2024. P. 1–6. DOI: 10.1109/ SED63331.2024.10741056.
7. Patent № 2810947 RF. Fazirovannaya antennaya reshetka chetyrekhsektsionnaya. S.A. Karpukhin. Opubl. 09.01.2024. Byul. № 1. (in Russian)
8. Karpukhin S.A. Raspredelenie elektropitaniya v chetyrekhsektsionnoj antennoj fazirovannoj reshetke s rabochej polosoj propuskaniya oktava. Vestnik vozdushno-kosmicheskoj oborony. 2024. № 4 (44). S. 68–74. (in Russian)
9. Klimov K.N. Chislennoe elektrodinamicheskoe modelirovanie vibratora s naklonnymi plechami v kanale Floke s ispol'zovaniem impedansno soglasovannogo materiala. Vestnik vozdushno-kosmicheskoj oborony. 2021. № 2 (30). S. 39–46. (in Russian)
10. Karpukhin S.A. Primenenie kontrollera i relejnoj skhemy zashchity ot tokovoj peregruzki tsepej elektropitaniya chetyrekhsektsionnoj fazirovannoj antennoj reshetki s shirokoj polosoj propuskaniya. Energobezopasnost' i energosberezhenie. 2024. № 5 (119). S. 64–68. (in Russian)
11. Pshenichkin A.S., Klimov K.N. Tverdotel'noe peredayushchee ustrojstvo vtorichnogo radiolokatora s korrektsiej faz summiruemykh signalov. Vestnik vozdushno-kosmicheskoj oborony. 2021. № 1 (29). S. 83–91. (in Russian)
12. Konov K.I., Klimov K.N. Snizhenie urovnya bokovykh lepestkov diagrammy napravlennosti linejnoj ekvidistantnoj fazirovannoj antennoj reshetki. Vestnik vozdushno-kosmicheskoj oborony. 2021. № 1 (29). S. 69–76. (in Russian)