Gyromagnetic device having a plurality of outwardly narrowing tapering members

Abstract

Abstract A WIDE BAND CIRCULATOR OR ISOLATOR DEVICE OF THE STRIPLINE OR MICROSTRIP TYPE WHICH ACHIEVES A BANDWIDTH EXCEEDING ONE OCTAVE USING STANDARD POLYCRYSTALLINE FERRIMAGNETIC MATERIALS, BUT WHICH CAN ACHIEVE BANDWIDTHS UP TO AND EXCEEDING TWO OCTAVES FOR CERTAIN CONFIGURATIONS OF THE FERRITE JUNCTION, OR WITH A SUITABLE MODE SUPPRESSOR. IN THE DEVICE, THE INNER CONDUCTOR OR CIRCUIT IS PLANAR AND HAS A PLURALITY OF OUTWARDLY TAPERING LEGS EACH OF WHICH CONSTITUTES A PORT. FERRIMAGNETIC OR GYROMAGNETIC MATERIAL IS PROVIDED OVERLYING A SUBSTANTIAL PORTION OF THE CIRCUIT INCLUDING AT LEAST SUBSTANTIALLY ALL OF THE PORTION THEREOF FUNCTIONING AS THE INPUT AND OUTPUT PORTS OF THE DEVICE. THE ENERGY IN THE DEVICE PROPAGATES ALONG THE EDGES THEREOF, AND ACCORDINGLY THE EDGES ARE DESIGNED TO BE FREE OF ABRUPT CHANGES IN ORDER THAT THERE BE NO ABRUPT IMPEDANCE CHANGES IN THE CIRCUIT. VARIOUS METHODS OF MODE SUPPRESSION FOR THIS DEVICE ARE PROVIDED INCLUDING INTERNALLY TERMINATING ONE OF THE PORTS BY AN OVERLYING LAYER OF LOSSY MATERIAL, AND CUTTING SLOTS THROUGH THE GROUND PLANE IN THE SAME DIRECTION AS THE CURRENT FLOW OF THE DESIRED MODE OF PROPAGATION.

Inventors

• 👤 Ross Anderson

Bibliographic Details