Fig. 4: Microphotographs of the inkjet-printed 24.5 GHz patch antenna array and backscatter communication circuit traces.
a, The shunt stub T-junction. b, 0402 SMD pads for the E-pHEMT. c, RF microstrip-to-patch transition.
Fig. 4: Microphotographs of the inkjet-printed 24.5 GHz patch antenna array and backscatter communication circuit traces. | Nature Electronics
