A Study of Interpulse Instability in Gallium Nitride Power Amplifiers in Multifunction Radars
The incorporation of gallium nitride (GaN) power amplifiers (PAs) into future high-power aperture radar systems is certain; however, the introduction of this technology into multifunction radar systems will present new challenges to radar engineers. This paper describes a broad investigation into am...
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| Veröffentlicht in: | IEEE transactions on microwave theory and techniques 2016-11, Vol.64 (11), p.3732-3747 |
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| creator | Tua, Carlos G. Pratt, Timothy Zaghloul, Amir I. |
| description | The incorporation of gallium nitride (GaN) power amplifiers (PAs) into future high-power aperture radar systems is certain; however, the introduction of this technology into multifunction radar systems will present new challenges to radar engineers. This paper describes a broad investigation into amplitude and phase transients produced by GaN PAs when they are excited with multifunction radar waveforms. These transients are the result of self-heating electrothermal memory effects and are manifested as interpulse instabilities that can negatively impact the coherent processing of multiple pulses. A behavioral model based on a Foster network topology has been developed to replicate the measured amplitude and phase transients accurately. This model has been used to develop a digital predistortion technique that successfully mitigates the impact of the transients. The moving target indicator improvement factor and the root mean square pulse-to-pulse stability are used as a metric to assess the impact of transients on radar system performance and to test the effectiveness of a novel digital predistortion concept. |
| doi_str_mv | 10.1109/TMTT.2016.2604808 |
| format | Article |
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This paper describes a broad investigation into amplitude and phase transients produced by GaN PAs when they are excited with multifunction radar waveforms. These transients are the result of self-heating electrothermal memory effects and are manifested as interpulse instabilities that can negatively impact the coherent processing of multiple pulses. A behavioral model based on a Foster network topology has been developed to replicate the measured amplitude and phase transients accurately. This model has been used to develop a digital predistortion technique that successfully mitigates the impact of the transients. The moving target indicator improvement factor and the root mean square pulse-to-pulse stability are used as a metric to assess the impact of transients on radar system performance and to test the effectiveness of a novel digital predistortion concept.</description><subject>Behavioral modeling</subject><subject>Digital technology</subject><subject>electrothermal memory effects</subject><subject>Gallium nitride</subject><subject>gallium nitride (GaN) monolithic microwave integrated circuit (MMIC)</subject><subject>Gallium nitrides</subject><subject>interpulse stability</subject><subject>Microwave theory and techniques</subject><subject>MMICs</subject><subject>moving target indicator (MTI)</subject><subject>Moving target indicators</subject><subject>multifunction radar system</subject><subject>Power amplifiers</subject><subject>power amplifiers (PAs)</subject><subject>Predistortion</subject><subject>Radar</subject><subject>Radar systems</subject><subject>Stability</subject><subject>Stability analysis</subject><subject>Transient analysis</subject><subject>Waveforms</subject><issn>0018-9480</issn><issn>1557-9670</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNo9kF1LwzAUhoMoOKc_QLwJeN2ZNB9NLsfQOdhUtF5KSNMEMrq2Jimyf2_LxJvzwXnf98ADwC1GC4yRfCh3ZbnIEeaLnCMqkDgDM8xYkUleoHMwQwiLTI6HS3AV435cKUNiBr6W8CMN9RF2Dm7aZEM_NNGOY0y68o1PR-hbuNZN44cDfPEp-NrCt-7HBrg89I133oY4aXZDk7wbWpN818J3XesQr8GF02PezV-fg8-nx3L1nG1f15vVcpsZmsuUVazKZeGqyjCCHM1pZWohclMZToThuOaW4YJJ7oQkhksrKNWSEywN0khSMgf3p9w-dN-DjUntuyG040uFBSkwYWgsc4BPKhO6GIN1qg_-oMNRYaQmimqiqCaK6o_i6Lk7eby19l9fsEJiKsgvlMtuIg</recordid><startdate>20161101</startdate><enddate>20161101</enddate><creator>Tua, Carlos G.</creator><creator>Pratt, Timothy</creator><creator>Zaghloul, Amir I.</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. (IEEE)</general><scope>97E</scope><scope>RIA</scope><scope>RIE</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>8FD</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0002-6342-9141</orcidid></search><sort><creationdate>20161101</creationdate><title>A Study of Interpulse Instability in Gallium Nitride Power Amplifiers in Multifunction Radars</title><author>Tua, Carlos G. ; Pratt, Timothy ; Zaghloul, Amir I.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c429t-b5b297fbbc530f424bcd882cbc638c61d6e517596f893c69e844a96319c0a0943</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Behavioral modeling</topic><topic>Digital technology</topic><topic>electrothermal memory effects</topic><topic>Gallium nitride</topic><topic>gallium nitride (GaN) monolithic microwave integrated circuit (MMIC)</topic><topic>Gallium nitrides</topic><topic>interpulse stability</topic><topic>Microwave theory and techniques</topic><topic>MMICs</topic><topic>moving target indicator (MTI)</topic><topic>Moving target indicators</topic><topic>multifunction radar system</topic><topic>Power amplifiers</topic><topic>power amplifiers (PAs)</topic><topic>Predistortion</topic><topic>Radar</topic><topic>Radar systems</topic><topic>Stability</topic><topic>Stability analysis</topic><topic>Transient analysis</topic><topic>Waveforms</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Tua, Carlos G.</creatorcontrib><creatorcontrib>Pratt, Timothy</creatorcontrib><creatorcontrib>Zaghloul, Amir I.</creatorcontrib><collection>IEEE All-Society Periodicals Package (ASPP) 2005-present</collection><collection>IEEE All-Society Periodicals Package (ASPP) 1998-Present</collection><collection>IEEE Electronic Library (IEL)</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>IEEE transactions on microwave theory and techniques</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Tua, Carlos G.</au><au>Pratt, Timothy</au><au>Zaghloul, Amir I.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A Study of Interpulse Instability in Gallium Nitride Power Amplifiers in Multifunction Radars</atitle><jtitle>IEEE transactions on microwave theory and techniques</jtitle><stitle>TMTT</stitle><date>2016-11-01</date><risdate>2016</risdate><volume>64</volume><issue>11</issue><spage>3732</spage><epage>3747</epage><pages>3732-3747</pages><issn>0018-9480</issn><eissn>1557-9670</eissn><coden>IETMAB</coden><abstract>The incorporation of gallium nitride (GaN) power amplifiers (PAs) into future high-power aperture radar systems is certain; however, the introduction of this technology into multifunction radar systems will present new challenges to radar engineers. 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| subjects | Behavioral modeling Digital technology electrothermal memory effects Gallium nitride gallium nitride (GaN) monolithic microwave integrated circuit (MMIC) Gallium nitrides interpulse stability Microwave theory and techniques MMICs moving target indicator (MTI) Moving target indicators multifunction radar system Power amplifiers power amplifiers (PAs) Predistortion Radar Radar systems Stability Stability analysis Transient analysis Waveforms |
| title | A Study of Interpulse Instability in Gallium Nitride Power Amplifiers in Multifunction Radars |
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