Self Biased Y-Junction Circulator at ${\rm K}_{\rm u}$ Band

Abstract

A self-biased microstrip Y-junction circulator was designed, fabricated and tested at K u band utilizing strontium M-type barium ferrite. The junction circuit consisted of a dielectric slab resting upon a polished thin composite plate of bulk strontium M-type hexaferrite. This approach proved to be mechanically rigid and compatible with the fabrication of integrated circuits yielding practical electrical characteristics of a circulator circuit. The measured isolation was 21 dB, and the insertion loss was 1.52 dB at 13.6 GHz. The measurements matched well with the HFSS simulation of the composite circulator design.

Consequences of magnetic anisotropy in realizing practical microwave hexaferrite devices

“…In one example, a self-biased circulator device operating at K U -band was designed and simulated using commercial finite element methods software [7]. The device was designed with the junction and impedance matching networks patterned on top of a dielectric layer positioned on top of the self-biased hexaferrite layer, thus simplifying the fabrication process and facilitating more seamless integration with other circuit components.…”

New Nanosized (Gd3+, Sm3+) Co-doped Zinc Ferrite for Telecommunication Applications. Magnetic and Structural Properties.

“…Thus, good control of the theoretical formalism of the role of magnetism and magnetic material properties in telecommunication systems and devices, is a great challenge for the advancement of device design and performance. Nanoferrites have been widely studied and applied in antennas [1]- [4] , circulators [5]- [7], insulators [8]- [10] and inductors [11]- [14].…”

Circulator Based on Spoof Surface Plasmon Polaritons

“…hree-port circulators are passive nonreciprocal devices, in which a microwave or radio frequency signal entering any port is transmitted only to the next port in rotation [1][2][3][4][5]. Nowadays, circulators are used more often in microwave area.…”