No. 104 (2026)

DOI: https://doi.org/10.64915/RADAP.2026.104

Published: 2026-06-30

Electrodynamics. Microwave devices. Antennas

Microstrip Dual-Band Branch-Line Balun With Arbitrary Complex Frequency-Dependent Input and Load Impedances in Bands

V. I. Oborzhytskyy, S. Ye. Fabirovskyy, V. H. Storozh, Yu. M. Matiieshyn, T. Ye. Banshchykova

5-14
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Wideband Digital Frequency Synthesisers With Low Phase Noise Based on Single-Flux Quantum Logic Elements

O. M. Novak , V. M. Kychak

15-22
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Hybrid-Integrated Balanced Subharmonic Mixer of the Millimeter Range With Low Conversion Losses

M. Yu. Omelianenko , T. V. Romanenko, O. V. Turieieva

23-32
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Telecommunication, navigation, radar systems, radiooptics and electroacoustics

Radar Signals Composed of Fragments With Square-Root and Linear Laws of Frequency Modulation

O. O. Kostyria, A. A. Hryzo, V. V. Varvarov, A. А. Lukianchykov, O. Yu. Drol

33-41
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Comparative Analysis of Spatial Spectral Estimation Algorithms: Advantages of the Maximum Entropy Method in Radio Direction Finding

O. I. Polikarovskykh, I. V. Hula

42-53
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Radioelectronics Medical Technologies

Diagnostic Software System for Automated Classification of Lung Sounds Based on Higher-Order Spectra Parameters

H. S. Porieva, K. O. Ivanko , Ye. S. Karpliuk , A. O. Popov , Philip de Chazal

54-62
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Selection of amplitude-temporal and spectral parameters of PPG signals for diagnostics based on machine learning methods

V. S. Mosiichuk, O. B. Sharpan, E. V. Guseva

63-73
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Functional Electronics. Micro- and Nanoelectronic Technology

Lumped-Distributed Low-Pass Filters Based on Bragg Hybridization Effect

E. A. Nelin

74-80
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