Abstract: An antenna includes an optically transparent substrate layer having a first surface and an opposing second surface; a radiating element having a first mesh structure and disposed on the first surface of the substrate layer; a ground plane having a second mesh structure formed on the second surface of the substrate layer; at least two feed lines configured to connect the radiating element to an external circuit; and at least two stubs connected to the radiating element.

Abstract: An antenna includes an optically transparent substrate layer having a first surface and an opposing second surface; a radiating element having a first mesh structure and disposed on the first surface of the substrate layer; a ground plane having a second mesh structure formed on the second surface of the substrate layer; at least two feed lines configured to connect the radiating element to an external circuit; and at least two stubs connected to the radiating element.

Abstract: A small array of antenna-coupled infrared bolometer detectors is connected in parallel. This small array is suitable as an individual area-receiving pixel of an infrared focal plane array. These pixels will have better coupling efficiency to extended sources than are possible with individual antenna-coupled sensors, which have a spatial response on the order of one wavelength in dimension. This pixel can be used to provide the advantages of antenna-coupled IR sensors (e.g., fast response, wavelength tuning, and polarization tuning) while increasing the collection efficiency of the sensors to non-laser sources. When integrated into focal plane arrays, these detectors can be used in remote-sensing systems to facilitate enhanced image recognition, feature extraction and image-clutter removal.

Abstract: A tuned antenna-coupled infrared detector is made possible by application of a bias voltage in the range of a few hundred millivolts. The use of first and second antenna arms connected to the detector makes possible polarization tuning which eliminates the need for bulk-optical polarization filters. An alternative tuned detector is one in which the antenna is frequency tuned by a capacitative device to make the detector particularly responsive to 8 um to 12 um infrared radiation. When integrated into focal plane arrays, these detectors can be used in remote-sensing systems to facilitate enhanced image recognition, feature extraction and image-clutter removal.