A circulator array is constructed in a planar substrate by forming a plurality of waveguide pair structures, each waveguide pair structure having first and second sections respectively coupled by first and second polarization multiplexers. The circuit is further provided with at least one resistor, at least one inductor, and at least one capacitor, symmetrically disposed within the circuit loop defined by the four ends. At least one inflatable member is disposed on the catheter and in communication with the lumen. The storage volume is enabled to re-claim the segment while the segment includes the release pending status.