WAVEGUIDE CIRCULATOR WITH IMPROVED TRANSITION TO OTHER TRANSMISSION LINE MEDIA

摘要

A waveguide circulator for an electro-magnetic field having a wavelength is provided. The waveguide circulator includes: N waveguide arms, where N is a positive integer; a ferrite element having N segments protruding into the N respective waveguide arms; at most (N−1) quarter-wave dielectric transformers attached to respective ends of at most (N−1) other segments; a first quarter-wave dielectric transformer attached to an end of the first segment; and a coaxial-coupling component. The N waveguide arms include a first-waveguide arm and (N−1) other-waveguide arms. The N segments include a first segment protruding into the first-waveguide arm and (N−1) other segments protruding into respective (N−1) other-waveguide arms. The coaxial-coupling component is positioned within a quarter wavelength of the electro-magnetic field from the first quarter-wave dielectric transformer positioned in the first-waveguide arm.

主权项

1. A waveguide circulator comprising:
at least N waveguide arms including a first-waveguide arm and (N−1) other-waveguide arms, where N is a positive integer, and wherein the first-waveguide has at least an end-portion having a first width and an inner-portion having a second width, the second width being larger than the first width; a ferrite element having N segments protruding into the N respective waveguide arms, the N segments including:
a first segment protruding into the first-waveguide arm, and(N−1) other segments protruding into the respective (N−1) other-waveguide arms; at most (N−1) quarter-wave dielectric transformers attached to respective ends of the at most (N−1) other segments of the ferrite element; at least one integrated-transition element attached to a respective at least one end of at least the first segment and extending into the respective at least one first-waveguide arm, the at least one integrated-transition element including:
a microstrip-dielectric board attached to an end of the first segment of the ferrite element;a microstrip trace on a first surface of the microstrip-dielectric board; anda microstrip-ground layer on a second surface of the microstrip-dielectric board, the first surface opposing the second surface, wherein the integrated-transition element simultaneously functions as a transformer and a microstrip probe to optimize impedance matching in the first-waveguide arm.