{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,23]],"date-time":"2026-01-23T06:25:06Z","timestamp":1769149506847,"version":"3.49.0"},"reference-count":53,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2022,1,21]],"date-time":"2022-01-21T00:00:00Z","timestamp":1642723200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100000104","name":"National Aeronautics and Space Administration","doi-asserted-by":"publisher","award":["NNH20ZDA001N-ACT-20-ACT20-0014"],"award-info":[{"award-number":["NNH20ZDA001N-ACT-20-ACT20-0014"]}],"id":[{"id":"10.13039\/100000104","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>We introduce an RF-photonics receiver concept enabling the next generation of ultra-compact millimeter wave radars suitable for cloud and precipitation profiling, planetary boundary layer observations, altimetry and surface scattering measurements. The RF-photonics receiver architecture offers some compelling advantages over traditional electronic implementations, including a reduced number of components and interfaces, leading to reduced size, weight and power (SWaP), as well as lower system noise, leading to improved sensitivity. Low instrument SWaP with increased sensitivity makes this approach particularly attractive for compact space-borne radars. We study the photonic receiver front-end both analytically and numerically and predict the feasibility of the greater than unity photonic gain and lower than ambient effective noise temperature of the device. The receiver design is optimized for W-band (94 GHz) radars, which are generally assessed to be the primary means for observing clouds in the free troposphere as well as planetary boundary layer from space.<\/jats:p>","DOI":"10.3390\/s22030804","type":"journal-article","created":{"date-parts":[[2022,1,23]],"date-time":"2022-01-23T20:34:40Z","timestamp":1642970080000},"page":"804","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["W-Band Photonic Receiver for Compact Cloud Radars"],"prefix":"10.3390","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6058-7390","authenticated-orcid":false,"given":"Dmitry","family":"Strekalov","sequence":"first","affiliation":[{"name":"Jet Propulsion Laboratory, California Institute of Technology, MS 298-100, Pasadena, CA 91109, USA"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4359-2651","authenticated-orcid":false,"given":"Ninoslav","family":"Majurec","sequence":"additional","affiliation":[{"name":"Jet Propulsion Laboratory, California Institute of Technology, MS 298-100, Pasadena, CA 91109, USA"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9939-9311","authenticated-orcid":false,"given":"Andrey","family":"Matsko","sequence":"additional","affiliation":[{"name":"Jet Propulsion Laboratory, California Institute of Technology, MS 298-100, Pasadena, CA 91109, USA"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0757-4387","authenticated-orcid":false,"given":"Vladimir","family":"Ilchenko","sequence":"additional","affiliation":[{"name":"Jet Propulsion Laboratory, California Institute of Technology, MS 298-100, Pasadena, CA 91109, USA"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5516-6882","authenticated-orcid":false,"given":"Simone","family":"Tanelli","sequence":"additional","affiliation":[{"name":"Jet Propulsion Laboratory, California Institute of Technology, MS 298-100, Pasadena, CA 91109, USA"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2391-4537","authenticated-orcid":false,"given":"Razi","family":"Ahmed","sequence":"additional","affiliation":[{"name":"Jet Propulsion Laboratory, California Institute of Technology, MS 298-100, Pasadena, CA 91109, USA"}]}],"member":"1968","published-online":{"date-parts":[[2022,1,21]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"809","DOI":"10.1175\/1520-0426(1998)015<0809:TTRMMT>2.0.CO;2","article-title":"The Tropical Rainfall Measuring Mission (TRMM) Sensor Package","volume":"15","author":"Kummerow","year":"1998","journal-title":"J. Atmos. Ocean. Technol."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1771","DOI":"10.1175\/BAMS-83-12-1771","article-title":"The Cloudsat Mission and the a-Train: A New Dimension of Space-Based Observations of Clouds and Precipitation","volume":"83","author":"Stephens","year":"2002","journal-title":"Bull. Am. Meteorol. Soc."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"3560","DOI":"10.1109\/TGRS.2008.2002030","article-title":"CloudSat\u2019s Cloud Profiling Radar After Two Years in Orbit: Performance, Calibration, and Processing","volume":"46","author":"Tanelli","year":"2008","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"701","DOI":"10.1175\/BAMS-D-13-00164.1","article-title":"The Global Precipitation Measurement Mission","volume":"95","author":"Hou","year":"2014","journal-title":"Bull. Am. Meteorol. Soc."},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Tanelli, S., Haddad, Z.S., Im, E., Durden, S.L., Sy, O.O., Peral, E., Sadowy, G.A., and Sanchez-Barbetty, M. (2018, January 23\u201327). Radar concepts for the next generation of spacebome observations of cloud and precipitation processes. Proceedings of the 2018 IEEE Radar Conference (RadarConf18), Oklahoma City, OK, USA.","DOI":"10.1109\/RADAR.2018.8378741"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"333","DOI":"10.1364\/JOSAB.20.000333","article-title":"Whispering-gallery-mode electro-optic modulator and photonic microwave receiver","volume":"20","author":"Ilchenko","year":"2003","journal-title":"JOSA B"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"1600","DOI":"10.1109\/LPT.2008.928837","article-title":"Ka Band All-Resonant Photonic Microwave Receiver","volume":"20","author":"Ilchenko","year":"2008","journal-title":"Phot. Technol. Lett."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"043812","DOI":"10.1103\/PhysRevA.77.043812","article-title":"Sensitivity of terahertz photonic receivers","volume":"77","author":"Matsko","year":"2008","journal-title":"Phys. Rev. A"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"713","DOI":"10.1364\/OL.34.000713","article-title":"Efficient upconversion of subterahertz radiation in a high-Q whispering gallery resonator","volume":"34","author":"Strekalov","year":"2009","journal-title":"Opt. Lett."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"033810","DOI":"10.1103\/PhysRevA.80.033810","article-title":"Microwave whispering-gallery resonator for efficient optical up-conversion","volume":"80","author":"Strekalov","year":"2009","journal-title":"Phys. Rev. A"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"1300","DOI":"10.1364\/OL.34.001300","article-title":"Tunable optical single-sideband modulator with complete sideband suppression","volume":"34","author":"Savchenkov","year":"2009","journal-title":"Opt. Lett."},{"key":"ref_12","first-page":"3427","article-title":"On the Sensitivity of All-Dielectric Microwave Photonic Receivers","volume":"28","author":"Matsko","year":"2010","journal-title":"J. Light. Technol."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"1572","DOI":"10.1364\/OL.35.001572","article-title":"Voltage-controlled photonic oscillator","volume":"35","author":"Savchenkov","year":"2010","journal-title":"Opt. Lett."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"122901","DOI":"10.1063\/1.4902895","article-title":"Photonic E-field sensor","volume":"4","author":"Savchenkov","year":"2014","journal-title":"AIP Adv."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"321","DOI":"10.1038\/nphys2911","article-title":"Bidirectional and Efficient Conversion between Microwave and Optical Light","volume":"10","author":"Andrews","year":"2014","journal-title":"Nat. Phys."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"597","DOI":"10.1364\/OPTICA.3.000597","article-title":"Efficient microwave to optical photon conversion: An electro-optical realization","volume":"3","author":"Rueda","year":"2016","journal-title":"Optica"},{"key":"ref_17","first-page":"12101219","article-title":"Sensitivity Limits of Millimeter-Wave Photonic Radiometers Based on Efficient Electro-Optic Upconverters","volume":"5","author":"Sedlmeir","year":"2018","journal-title":"Optica"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"1291","DOI":"10.1364\/OPTICA.397967","article-title":"Waveguide Cavity Optomagnonics for Microwave-to-Optics Conversion","volume":"7","author":"Zhu","year":"2020","journal-title":"Optica"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"69","DOI":"10.1038\/s41567-019-0673-7","article-title":"Microwave-to-Optics Conversion Using a Mechanical Oscillator in Its Quantum Ground State","volume":"16","author":"Forsch","year":"2020","journal-title":"Nat. Phys."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"020315","DOI":"10.1103\/PRXQuantum.1.020315","article-title":"Bidirectional Electro-Optic Wavelength Conversion in the Quantum Ground State","volume":"1","author":"Hease","year":"2020","journal-title":"PRX Quantum"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"9403","DOI":"10.1038\/s41598-020-65987-x","article-title":"Sensitivity and Noise in THz Electro-Optic Upconversion Radiometers","volume":"10","author":"Popovic","year":"2020","journal-title":"Sci. Rep."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"4453","DOI":"10.1038\/s41467-021-24809-y","article-title":"Bidirectional Interconversion of Microwave and Light with Thin-Film Lithium Niobate","volume":"12","author":"Xu","year":"2021","journal-title":"Nat. Commun."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"154","DOI":"10.1117\/12.385398","article-title":"Microsphere integration in active and passive photonics devices","volume":"3930","author":"Ilchenko","year":"2000","journal-title":"Proc. SPIE"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"120","DOI":"10.1117\/12.424663","article-title":"Novel whispering-gallery resonators for lasers, modulators, and sensors","volume":"4270","author":"Ilchenko","year":"2001","journal-title":"Proc. SPIE"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"37","DOI":"10.1049\/el:20010038","article-title":"Microphotonic millimetre-wave receiver architecture","volume":"37","author":"Cohen","year":"2001","journal-title":"Electron. Lett."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"300","DOI":"10.1049\/el:20010220","article-title":"Microphotonic modulator for microwave receiver","volume":"37","author":"Cohen","year":"2001","journal-title":"Electron. Lett."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"495","DOI":"10.1016\/S0038-1101(00)00248-3","article-title":"Microphotonic components for a mm-wave receiver","volume":"45","author":"Cohen","year":"2001","journal-title":"Solid-State Electron."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"1577","DOI":"10.1016\/S0038-1101(01)00165-4","article-title":"High-Q microphotonic electro-optic modulator","volume":"45","author":"Cohen","year":"2001","journal-title":"Solid-State Electron."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"1602","DOI":"10.1109\/LPT.2002.803916","article-title":"Sub-microwatt photonic microwave receiver","volume":"14","author":"Ilchenko","year":"2002","journal-title":"Phot. Technol. Lett."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"1428","DOI":"10.1016\/j.sse.2005.06.008","article-title":"Self-homodyne RF-optical LiNbO3 microdisk receiver","volume":"49","author":"Levi","year":"2005","journal-title":"Solid-State Electron."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"821","DOI":"10.1109\/TMTT.2005.863061","article-title":"14.6-GHz LiNbO3 microdisk photonic self-homodyne RF receiver","volume":"54","author":"Levi","year":"2006","journal-title":"Microw. Theory Technol. IEEE Trans."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"155","DOI":"10.1002\/j.1538-7305.1963.tb04006.x","article-title":"The Fabry-Perot Electrooptic Modulator","volume":"42","author":"Gordon","year":"1963","journal-title":"Bell Syst. Tech. J."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"1121","DOI":"10.1109\/TMTT.1982.1131213","article-title":"Waveguide Electrooptic Modulators","volume":"30","author":"Alferness","year":"1982","journal-title":"Microw. Theory Tech. IEEE Trans."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"721","DOI":"10.1109\/68.219723","article-title":"Optical frequency comb generator using phase modulation in amplified circulating loop","volume":"5","author":"Ho","year":"1993","journal-title":"Phot. Technol. Lett."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"1244","DOI":"10.1049\/el:20010861","article-title":"LiNbO3 resonant-type optical modulator with double-stub structure","volume":"37","author":"Kawanishi","year":"2001","journal-title":"Electron. Lett."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"795","DOI":"10.1109\/LPT.2002.1003096","article-title":"Fundamental limitations of optical resonator based high-speed EO modulators","volume":"14","author":"Gheorma","year":"2002","journal-title":"Phot. Technol. Lett."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"299","DOI":"10.1049\/el:20040202","article-title":"Generation of super-stable 40 GHz pulses from Fabry-Perot resonator integrated with electro-optic phase modulator","volume":"40","author":"Kato","year":"2004","journal-title":"Electron. Lett."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"6235","DOI":"10.1364\/AO.44.006235","article-title":"Large-area Fabry\u2013Perot modulator based on electro-optic polymers","volume":"44","author":"Benter","year":"2005","journal-title":"Appl. Opt."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"1263","DOI":"10.1364\/AO.44.001263","article-title":"Generation of a superstable Lorentzian pulse train with a high repetition frequency based on a Fabry\u2013Perot resonator integrated with an electro-optic phase modulator","volume":"44","author":"Kato","year":"2005","journal-title":"Appl. Opt."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"1968","DOI":"10.1109\/JLT.2002.803058","article-title":"Polymer Micro-Ring Filters and Modulators","volume":"20","author":"Rabiei","year":"2002","journal-title":"J. Light. Technol."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"1295","DOI":"10.1109\/LPT.2004.825965","article-title":"Traveling-wave ring circuit for resonant enhancement of electrooptic modulators","volume":"16","author":"Weldon","year":"2004","journal-title":"Phot. Technol. Lett."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"1297","DOI":"10.1049\/el:20052765","article-title":"Linearity of ring resonator-based electro-optic polymer modulator","volume":"41","author":"Tazawa","year":"2005","journal-title":"Electron. Lett."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"211","DOI":"10.1109\/LPT.2005.861630","article-title":"Analysis of ring resonator-based traveling-wave modulators","volume":"18","author":"Tazawa","year":"2006","journal-title":"Photonics Technol. Lett."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"3514","DOI":"10.1109\/JLT.2006.878514","article-title":"Ring Resonator-Based Electrooptic Polymer Traveling-Wave Modulator","volume":"24","author":"Tazawa","year":"2006","journal-title":"J. Light. Technol."},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"104","DOI":"10.1109\/JSTQE.2006.887156","article-title":"Electrooptic Polymer Ring Resonator Modulation up to 165 GHz","volume":"13","author":"Bortnik","year":"2007","journal-title":"J. Sel. Top. Quantum Electron."},{"key":"ref_46","unstructured":"Boyd, R.W. (2003). Nonlinear Optics, Academic Press. [3rd ed.]."},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"30683","DOI":"10.1364\/OE.21.030683","article-title":"Whispering gallery modes at the rim of an axisymmetric optical resonator: Analytical versus numerical description and comparison with experiment","volume":"21","author":"Breunig","year":"2013","journal-title":"Opt. Express"},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"3056","DOI":"10.1364\/JOSAB.30.003056","article-title":"Analytical estimates of eigenfrequencies, dispersion, and field distribution in whispering gallery resonators","volume":"30","author":"Demchenko","year":"2013","journal-title":"JOSA B"},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"6561","DOI":"10.1063\/1.363679","article-title":"Temperature-dependent Dispersion Relation of Ferroelectric Lithium Tantalate","volume":"80","author":"Abedin","year":"1996","journal-title":"J. Appl. Phys."},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"032601","DOI":"10.7567\/JJAP.52.032601","article-title":"Temperature-Dependent Sellmeier Equation for Refractive Index of 1.0 Mol % Mg-Doped Stoichiometric Lithium Tantalate","volume":"52","author":"Lim","year":"2013","journal-title":"Jpn. J. Appl. Phys."},{"key":"ref_51","doi-asserted-by":"crossref","unstructured":"Basilio, R.R., Im, E., Rokey, M.J., and Vane, D.G. (2006, January 11\u201314). A spaceborne microwave radar system for looking inside clouds. Proceedings of the Sensors, Systems, and Next-Generation Satellites X, Stockholm, Sweden.","DOI":"10.1117\/12.693479"},{"key":"ref_52","doi-asserted-by":"crossref","first-page":"1815","DOI":"10.5194\/amt-12-1815-2019","article-title":"Calibration of a 35 GHz airborne cloud radar: Lessons learned and intercomparisons with 94 GHz cloud radars","volume":"12","author":"Ewald","year":"2019","journal-title":"Atmos. Meas. Tech."},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"1078","DOI":"10.1109\/TMTT.2018.2883107","article-title":"Millimeter-Wave Dielectric Properties of Highly Refractive Single Crystals Characterized by Waveguide Cavity Resonance","volume":"67","author":"Schermer","year":"2019","journal-title":"IEEE Trans. Microw. Theory Tech."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/22\/3\/804\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T22:05:17Z","timestamp":1760133917000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/22\/3\/804"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,1,21]]},"references-count":53,"journal-issue":{"issue":"3","published-online":{"date-parts":[[2022,2]]}},"alternative-id":["s22030804"],"URL":"https:\/\/doi.org\/10.3390\/s22030804","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2022,1,21]]}}}