Design and Experimental Study of the Bends of EBG Waveguides

• Published in: Journal of communications technology & electronics Vol. 66; no. 7; pp. 801 - 817
• Main Authors: Bankov, S. E., Frolova, E. V., Kalinichev, V. I.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.07.2021; Springer; Springer Nature B.V
• Subjects: Analysis; Bends; Circuits; Communications Engineering; Crystal lattices; Electrodynamics and Wave Propagation; Electromagnetism; Engineering; Frequency ranges; Networks; Optimization; Reconfiguration; Waveguides
• ISSN: 1064-2269; 1555-6557
• DOI: 10.1134/S1064226921070019

— The bends by 90° and 45° of three-row EBG waveguides based on an electromagnetic crystal (EMC) in the form of a two-dimensional periodic lattice of metal cylinders placed inside a plane waveguide (PW) are under consideration. The bends of waveguides oriented along the main and diagonal optical axes of the EMC are examined. Optimization of the bends is performed for EBG reconfigurable circuits with two- and three-position control using electromagnetic simulation with HFSS. It is shown that in the frequency range of 1.5 : 1, the elements with two-position control provide matching at a level not worse than ‒15 dB, and the elements with three-position control are matched at a level of –20 dB. An experimental study of bends for reconfigurable circuits with two-position control has been carried out, the results of which confirm the main conclusions of electrodynamic modeling. A reflectometric scheme for measuring small reflection coefficients is proposed, which makes it possible to exclude the influence of imperfect elements of the measuring microwave setup on the measurement results.