# US 2014/0191351 A1 · MINIATURE PHASE-CORRECTED ANTENNAS FOR HIGH RESOLUTION FOCAL PLANE THz IMAGING ARRAYS > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0191351 A1 - Document ID: US20140191351A1 - Status: Published application - Kind: A1 - Application number: 14/208,000 - Filed: 2014-03-13 - Published: 2014-07-10 - Earliest claimed: 2009-05-28 - Assignees: The Ohio State University - Applicants: Ohio State University - Inventors: Kubilay Sertel; Gokhan Mumcu - Web page: https://patentgrep.com/patent/US20140191351A1 ## CPC - H10F 39/8023: {Disposition of the elements in pixels, e.g. smaller elements in the centre of the imager compared to larger elements at the periphery} - G01J 1/4228: {arrangements with two or more detectors, e.g. for sensitivity compensation} - H01Q 3/40: with phasing matrix - H01Q 19/062: {for focusing} - H01Q 25/007: {using two or more primary active elements in the focal region of a focusing device (for operation on different wavebands H01Q5/22)} - H10F 39/806: {Optical elements or arrangements associated with the image sensors} - G01J 5/0837: {Microantennas, e.g. bow-tie} - H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION - G01J: MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY (light sources F21, H01J, H01K, H05B; investigating properties of materials by optical means G01N) - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract An imaging/detection device includes a hemispherical lens having a surface opposite a curvature of the hemispherical lens, where the hemispherical lens defines an optical axis. The imaging/detection device also includes a plurality of detectors arranged on a focal plane array that is positioned near the surface of the hemispherical lens. Each of the detectors respectively includes a diode and an antenna monolithically integrated with the diode. Additionally, at least one of the detectors is offset by a distance from the optical axis of the hemispherical lens and is configured such that a radiating pattern of the respective antenna is tilted by an angle and directed toward the optical axis of the hemispherical lens. A maximum direction of the radiating pattern of the respective antenna is related to the distance by which the detector is offset from the optical axis of the hemispherical lens. ## Claims ### Claim at position 1 1-20. (canceled) ### Claim 21 An imaging/detection device, comprising: a hemispherical lens having a surface opposite to a curvature of the hemispherical lens, the surface being extended away from a center of the hemispherical lens, the hemispherical lens defining an optical axis; and a plurality of detectors arranged on a focal plane array that is positioned near the surface of the hemispherical lens, each of the detectors respectively including: a diode, and an antenna monolithically integrated with the diode, wherein at least one of the detectors is offset by a distance from the optical axis of the hemispherical lens and is configured such that a radiating pattern of the respective antenna of the at least one of the detectors is tilted by an angle and directed toward the optical axis of the hemispherical lens, a maximum direction of the radiating pattern of the respective antenna of the at least one of the detectors being related to the distance by which the at least one of the detectors is offset from the optical axis of the hemispherical lens. ### Claim 22 (depends on 21) The imaging/detection device of claim 21, wherein the respective diode and antenna of the at least one of the detectors are configured such that an input impedance of the respective diode of the at least one of the detectors and an impedance of the respective antenna of the at least one of the detectors are approximately matched at a selected frequency or a selected range of frequencies. ### Claim 23 (depends on 21) The imaging/detection device of claim 21, wherein the respective diode of the at least one of the detectors is configured to rectify signals detected by the respective antenna of the at least one of the detectors to a measurable voltage. ### Claim 24 (depends on 23) The imaging/detection device of claim 23, wherein the respective diode of the at least one of the detectors is a Schottky diode or a backward diode. ### Claim 25 (depends on 21) The imaging/detection device of claim 21, wherein the detectors arranged on the focal plane array include single band detectors, broad band detectors, or a combination of single band and broad band detectors. ### Claim 26 (depends on 21) The imaging/detection device of claim 21, wherein the respective diode of the at least one of the detectors is positioned away from a geometric center of the respective antenna of the at least one of the detectors such that the radiating pattern of the respective antenna of the at least one of the detectors is tilted by the angle and directed toward the optical axis of the hemispherical lens. ### Claim 27 (depends on 21) The imaging/detection device of claim 21, wherein the respective antenna of the at least one of the detectors includes one or more parasitic slots such that the radiating pattern of the respective antenna of the at least one of the detectors is tilted by the angle and directed toward the optical axis of the hemispherical lens. ### Claim 28 (depends on 21) The imaging/detection device of claim 21, wherein a first electric length of a first feed line that couples a first portion of the respective antenna of the at least one of the detectors to the respective diode of the at least one of the detectors is longer than a second electric length of a second feed line that couples a second portion of the respective antenna of the at least one of the detectors to the respective diode of the at least one of the detectors such that the radiating pattern of the respective antenna of the at least one of the detectors is tilted by the angle and directed toward the optical axis of the hemispherical lens. ### Claim 29 (depends on 21) The imaging/detection device of claim 21, wherein the radiating pattern of the respective antenna of the at least one of the detectors is tilted by the angle and directed toward the optical axis of the hemispherical lens by one or more of: a position of the respective diode of the at least one of the detectors with respect to the respective antenna of the at least one of the detectors being different in a first direction, a second direction, or both a first and second direction as compared to a position of the respective diode of one of the detectors aligned with the optical axis of the hemispherical lens with respect to the respective antenna of the one of the detectors aligned with the optical axis of the hemispherical lens, an electric length of a feed line coupling the respective antenna of the at least one of the detectors to the respective diode of the at least one of the detectors being longer than an electric length of a feed line coupling the respective antenna of the one of the detectors aligned with the optical axis of the hemispherical lens to the respective diode of the one of the detectors aligned with the optical axis of the hemispherical lens, and the respective antenna of the at least one of the detectors including one or more parasitic slots not included in the respective antenna of the one of the detectors aligned with the optical axis of the hemispherical lens. ### Claim 30 (depends on 21) The imaging/detection device of claim 21, wherein one or more of the detectors include an antenna with a bow-tie antenna configuration, a planar log-periodic antenna configuration, a double-slot with microstrip feed antenna configuration, a spiral antenna configuration, a helical antenna configuration, a ring antenna configuration, a dielectric rod antenna configuration, or a double slot antenna with co-planar waveguide feed configuration. ### Claim 31 (depends on 21) The imaging/detection device of claim 21, wherein the focal plane array is approximately planar. ### Claim 32 (depends on 21) The imaging/detection device of claim 21, wherein a size of the respective antenna of the at least one of the detectors is selected based on a diffraction limit of an aperture of the hemispherical lens. ### Claim 33 (depends on 21) The device of claim 21, wherein the plurality of detectors are configured to detect signals with frequencies between a radiofrequency band and an infrared or optical band. ### Claim 34 An imaging/detection device, comprising: a hemispherical lens having a surface opposite to a curvature of the hemispherical lens, the surface being extended away from a center of the hemispherical lens, the hemispherical lens defining an optical axis; and a plurality of detectors arranged on a focal plane array that is positioned near the surface of the hemispherical lens, each of the detectors respectively including: an antenna; and a sensor element coupled to the antenna, wherein at least one of the detectors is configured such that a radiating pattern of the respective antenna of the at least one of the detectors is tilted by an angle and directed toward the optical axis of the hemispherical lens. ### Claim 35 (depends on 34) The imaging/detection device of claim 34, wherein the detectors arranged on the focal plane array include single band detectors, broad band detectors, or a combination of single band and broad band detectors. ### Claim 36 (depends on 34) The imaging/detection device of claim 34, wherein the respective sensor element of the at least one of the detectors is positioned away from a geometric center of the respective antenna of the at least one of the detectors such that the radiating pattern of the respective antenna of the at least one of the detectors is tilted by the angle and directed toward the optical axis of the hemispherical lens. ### Claim 37 (depends on 34) The imaging/detection device of claim 34, wherein the respective antenna of the at least one of the detectors includes one or more parasitic slots such that the radiating pattern of the respective antenna of the at least one of the detectors is tilted by the angle and directed toward the optical axis of the hemispherical lens. ### Claim 38 (depends on 34) The imaging/detection device of claim 34, wherein a first electric length of a first feed line that couples a first portion of the respective antenna of the at least one of the detectors to the respective sensor element of the at least one of the detectors is longer than a second electric length of a second feed line that couples a second portion of the respective antenna of the at least one of the detectors to the respective sensor element of the at least one of the detectors such that the radiating pattern of the respective antenna of the at least one of the detectors is tilted by the angle and directed toward the optical axis of the hemispherical lens. ### Claim 39 (depends on 34) The imaging/detection device of claim 34, wherein one or more of the detectors include an antenna with a bow-tie antenna configuration, a planar log-periodic antenna configuration, a double-slot with microstrip feed antenna configuration, a spiral antenna configuration, a helical antenna configuration, a ring antenna configuration, a dielectric rod antenna configuration, or a double slot antenna with co-planar waveguide feed configuration. ### Claim 40 (depends on 34) The imaging/detection device of claim 34, wherein the respective sensor element of the at least one of the detectors is a Schottky diode, a backward diode or a heterodyne mixer.