{"id":110,"date":"2022-02-18T15:50:31","date_gmt":"2022-02-18T20:50:31","guid":{"rendered":"https:\/\/umaine.edu\/rfphotonics\/?page_id=110"},"modified":"2022-02-18T16:08:56","modified_gmt":"2022-02-18T21:08:56","slug":"harmonic-direction-finding-radar","status":"publish","type":"page","link":"https:\/\/umaine.edu\/rfphotonics\/home\/current-research-projects\/harmonic-direction-finding-radar\/","title":{"rendered":"Harmonic Direction Finding Radar"},"content":{"rendered":"

Tracking Juvenile Wood Frogs With Harmonic Radar (2010 – 2013)<\/strong><\/p>\n

\"Juvenile
Juvenile wood frog with harmonic tag attached to its waist.<\/figcaption><\/figure>\n
\"Photo
5.8 GHz \/ 11.6 GHz harmonic direction finding radar instrument.<\/figcaption><\/figure>\n
\"Photo
Graduate and undergraduate students field testing the HDF radar instrument.<\/figcaption><\/figure>\n

 <\/p>\n

Wood frogs are a source of nutrients for other wildlife, hence their health and survival determines the health of the forest. Juvenile frogs have a length of less then 4 centimeters and a weight of approximately 0.6 grams, making battery powered tag applications impractical. A passive tag using a Schottky diode was developed, along with a 5.8 GHz \/ 11.6 GHz harmonic direction finding radar, to track juvenile wood frogs in the field.<\/p>\n

This research was been funded by the National Science Foundation.<\/p>\n

    \n
  • Faculty: Nuri Emanetoglu (ECE), Herbert Aumann (ECE), Malcolm Hunter (WLE)<\/li>\n
  • Graduate students: Brittany Cline<\/li>\n
  • Undergraduate students: Evan Kus, Matthew Krenik, Margaret Thompson<\/li>\n<\/ul>\n

    Publications<\/em><\/p>\n

      \n
    • \u201cApplication of Huygens\u2019 Principle to a Dual Frequency Constant Beamwidth Reflector Operating in the Focused Near-Field\u201d, H. Aumann, N.W. Emanetoglu, 36th Annual Symposium of the Antenna Measurement Techniques Association<\/em>, Tuscon, AZ, Oct. 12-17, 2014<\/li>\n
    • \u201cA Constant Beamwidth Reflector Antenna for a Harmonic Radar Operating in the Near-Field\u201d, H. Aumann, N.W. Emanetoglu, 16th Intl. on Antenna Tech. and Applied Electromagnetics<\/em>, Victoria, BC, Canada, July 13-17, DOI: 10.1109\/ANTEM.2014.6887680, 2014<\/li>\n
    • \u201cA Wideband Harmonic Radar for Tracking Small Wood Frogs\u201d, H. Aumann, N.W. Emanetoglu, 2014 IEEE Radar Conference<\/em>, Cincinnati, OH May 19 – 23, 2014, pp. 108-111, DOI: 10.1109\/RADAR.2014.6875565, 2014<\/li>\n
    • \u201cA Technique for Determining the Amplitude Center Location of an End-Fire Antenna in the Near Field,\u201d Herbert Aumann, Nuri Emanetoglu, 35th Annual Symposium of the Antenna Measurement Techniques Association<\/em>, Columbus, OH, Oct. 6-11, 2013<\/li>\n
    • \u201cA Low-Cost Harmonic Radar for Tracking Very Small Tagged Amphibians\u201d, H. Aumann, E. Kus, B. Cline, Nuri W. Emanetoglu, Proceedings of the <\/em>2013 IEEE International Instrumentation and Measurement Technology Conference<\/em>, pp. 234-237, DOI: 10.1109\/I2MTC.2013.6555415, 2013<\/li>\n
    • \u201cA 5.8 GHz Folded Dipole Harmonic Tag for Tracking Small Animals\u201d, H. Aumann, E. Kus, B. Cline and Nuri W. Emanetoglu, Proceedings of the 2012 IEEE International Conference on Wireless Information Technology and Systems<\/em>, 109.4.1-4, DOI 1109\/ICWITS.2012.6417669, 2012<\/li>\n
    • \u201cAn Asymmetrical Dipole Tag with Optimum Harmonic Conversion Efficiency\u201d, H. Aumann, E. Kus, B. Cline, Nuri Emanetoglu, Proceedings of the 2012 IEEE Antennas and Propagation Society International Symposium<\/em>, 511.7.1-4, DOI: 10.1109\/APS.2012.6348447, 2012<\/li>\n<\/ul>\n

       <\/p>\n","protected":false},"excerpt":{"rendered":"

      Tracking Juvenile Wood Frogs With Harmonic Radar (2010 – 2013)   Wood frogs are a source of nutrients for other wildlife, hence their health and survival determines the health of the forest. Juvenile frogs have a length of less then 4 centimeters and a weight of approximately 0.6 grams, making battery powered tag applications impractical. 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