Figure 2
From: A Wide Dynamic Range Polarization Sensing Long Wave Infrared Detector
Design procedure for a single slot antenna coupled to microbolometers. (a) Schematic of a conventional slot antenna with a port in the middle, which represents the load. (b) Electric current distribution around the slot. Current is maximum at the edges of the slot and zero at the center of the slot. (c) The input resistance of the slot antenna changes with moving the position of the port along the slot opening. By moving towards the edges of the slot, the input resistance decreases. (d) Schematic of the modified structure of the slot antenna coupled with two microbolometers used as the detectors of the IR wave. The areas beyond the bolometer loads are removed to provide the dc isolation between the two sides of each bolometer. The path for induced IR current in the antenna is provided by metallic bolometers. (e) The absorbed power in the bolometers as a function of incoming wave frequency for different states of polarization. The distance between the two bolometers, which determines the slot length is optimized to receive the maximum power at the working frequency of 28.3 THz.
