Theory of high-power wide-band traveling-wave tube using coaxial inverted helical groove slow-wave structure
A novel slow-wave structure (SWS), the coaxial inverted helical groove structure, is presented and those of its properties used for wide-band traveling-wave tube (TWT) are investigated. The first part of the paper concerns the wave properties of this structure in the case of a vacuum. The influence...
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| Veröffentlicht in: | IEEE transactions on plasma science 2002-10, Vol.30 (5), p.2010-2018 |
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| container_issue | 5 |
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| container_title | IEEE transactions on plasma science |
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| creator | Yanyu Wei Baofu Jia Gun-Sik Park Young-Do Joo Guofen Yu Wenxiang Wang Shenggang Liu Uhm, H.S. |
| description | A novel slow-wave structure (SWS), the coaxial inverted helical groove structure, is presented and those of its properties used for wide-band traveling-wave tube (TWT) are investigated. The first part of the paper concerns the wave properties of this structure in the case of a vacuum. The influence of the geometrical dimensions on dispersion characteristics and interaction impedance are investigated. The theoretical results reveal a very weak dispersion for the fundamental wave in the structure. The negative dispersion can be realized by a suitable selection of the structural parameters. The interaction impedance of the fundamental wave is about 10 /spl Omega/. The interaction impedance of the -1 space harmonic wave is much lower than that of the fundamental wave. Thus, the risk of backward wave oscillation is reduced. The software high frequency structure simulator (HFSS) is also used to calculate the dispersion property of the SWS. The simulation results from HFSS and the theoretical results agree well, which supports the theory. In the second part, a self-consistent linear theory of a coaxial inverted helical groove TWT is presented. The typical small signal gain per period is about 0.5 dB and the 3-dB small-signal gain bandwidth can exceed 25% with a 33-dB gain of tube. |
| doi_str_mv | 10.1109/TPS.2002.807498 |
| format | Article |
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The first part of the paper concerns the wave properties of this structure in the case of a vacuum. The influence of the geometrical dimensions on dispersion characteristics and interaction impedance are investigated. The theoretical results reveal a very weak dispersion for the fundamental wave in the structure. The negative dispersion can be realized by a suitable selection of the structural parameters. The interaction impedance of the fundamental wave is about 10 /spl Omega/. The interaction impedance of the -1 space harmonic wave is much lower than that of the fundamental wave. Thus, the risk of backward wave oscillation is reduced. The software high frequency structure simulator (HFSS) is also used to calculate the dispersion property of the SWS. The simulation results from HFSS and the theoretical results agree well, which supports the theory. In the second part, a self-consistent linear theory of a coaxial inverted helical groove TWT is presented. The typical small signal gain per period is about 0.5 dB and the 3-dB small-signal gain bandwidth can exceed 25% with a 33-dB gain of tube.</description><identifier>ISSN: 0093-3813</identifier><identifier>EISSN: 1939-9375</identifier><identifier>DOI: 10.1109/TPS.2002.807498</identifier><identifier>CODEN: ITPSBD</identifier><language>eng</language><publisher>New York, NY: IEEE</publisher><subject>Applied sciences ; Bandwidth ; Coaxial components ; Coupling circuits ; Dispersions ; Electronic tubes, masers ; Electronics ; Exact sciences and technology ; Frequency ; Gain ; Grooves ; Helical ; Impedance ; Laboratories ; Microwave tubes (eg, klystrons, magnetrons, traveling-wave, backward-wave tubes, etc.) ; Microwaves ; Noise levels ; Physics ; Physics of gases, plasmas and electric discharges ; Physics of plasmas and electric discharges ; Plasma interactions (nonlaser) ; Plasma interactions with antennas; plasma-filled waveguides ; Signal analysis ; Simulation ; Structural engineering ; Theory ; Traveling wave tubes ; Wideband</subject><ispartof>IEEE transactions on plasma science, 2002-10, Vol.30 (5), p.2010-2018</ispartof><rights>2003 INIST-CNRS</rights><rights>Copyright Institute of Electrical and Electronics Engineers, Inc. (IEEE) Oct 2002</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c410t-b766a305663e65a1208f1abd1d946f079b3c2486cac60b2d20d8ca3fac753e4d3</citedby><cites>FETCH-LOGICAL-c410t-b766a305663e65a1208f1abd1d946f079b3c2486cac60b2d20d8ca3fac753e4d3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/1178018$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>314,780,784,796,27924,27925,54758</link.rule.ids><linktorsrc>$$Uhttps://ieeexplore.ieee.org/document/1178018$$EView_record_in_IEEE$$FView_record_in_$$GIEEE</linktorsrc><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=14530131$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Yanyu Wei</creatorcontrib><creatorcontrib>Baofu Jia</creatorcontrib><creatorcontrib>Gun-Sik Park</creatorcontrib><creatorcontrib>Young-Do Joo</creatorcontrib><creatorcontrib>Guofen Yu</creatorcontrib><creatorcontrib>Wenxiang Wang</creatorcontrib><creatorcontrib>Shenggang Liu</creatorcontrib><creatorcontrib>Uhm, H.S.</creatorcontrib><title>Theory of high-power wide-band traveling-wave tube using coaxial inverted helical groove slow-wave structure</title><title>IEEE transactions on plasma science</title><addtitle>TPS</addtitle><description>A novel slow-wave structure (SWS), the coaxial inverted helical groove structure, is presented and those of its properties used for wide-band traveling-wave tube (TWT) are investigated. The first part of the paper concerns the wave properties of this structure in the case of a vacuum. The influence of the geometrical dimensions on dispersion characteristics and interaction impedance are investigated. The theoretical results reveal a very weak dispersion for the fundamental wave in the structure. The negative dispersion can be realized by a suitable selection of the structural parameters. The interaction impedance of the fundamental wave is about 10 /spl Omega/. The interaction impedance of the -1 space harmonic wave is much lower than that of the fundamental wave. Thus, the risk of backward wave oscillation is reduced. The software high frequency structure simulator (HFSS) is also used to calculate the dispersion property of the SWS. The simulation results from HFSS and the theoretical results agree well, which supports the theory. In the second part, a self-consistent linear theory of a coaxial inverted helical groove TWT is presented. The typical small signal gain per period is about 0.5 dB and the 3-dB small-signal gain bandwidth can exceed 25% with a 33-dB gain of tube.</description><subject>Applied sciences</subject><subject>Bandwidth</subject><subject>Coaxial components</subject><subject>Coupling circuits</subject><subject>Dispersions</subject><subject>Electronic tubes, masers</subject><subject>Electronics</subject><subject>Exact sciences and technology</subject><subject>Frequency</subject><subject>Gain</subject><subject>Grooves</subject><subject>Helical</subject><subject>Impedance</subject><subject>Laboratories</subject><subject>Microwave tubes (eg, klystrons, magnetrons, traveling-wave, backward-wave tubes, etc.)</subject><subject>Microwaves</subject><subject>Noise levels</subject><subject>Physics</subject><subject>Physics of gases, plasmas and electric discharges</subject><subject>Physics of plasmas and electric discharges</subject><subject>Plasma interactions (nonlaser)</subject><subject>Plasma interactions with antennas; plasma-filled waveguides</subject><subject>Signal analysis</subject><subject>Simulation</subject><subject>Structural engineering</subject><subject>Theory</subject><subject>Traveling wave tubes</subject><subject>Wideband</subject><issn>0093-3813</issn><issn>1939-9375</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2002</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNqNkcFrFDEUxoNYcG09e_ASBPU02_eSTCY5SqlWKFhwPYdMJrObMp2syUzX_vfNMoVCD-Ipycvv--B9HyHvEdaIoM83N7_WDICtFTRCq1dkhZrrSvOmfk1WAJpXXCF_Q97mfAuAoga2IsNm52N6oLGnu7DdVft48IkeQuer1o4dnZK990MYt9WhXOg0t57Oubypi_ZvsAMN471Pk-_ornCuDLYpxoLmIR4WUZ7S7KY5-TNy0tsh-3dP5yn5_e1yc3FVXf_8_uPi63XlBMJUtY2UlkMtJfeytshA9WjbDjstZA-NbrljQklnnYSWdQw65SzvrWtq7kXHT8mXxXef4p_Z58nchez8MNjRxzkbXTxqITUv5Od_kkypkqLQ_wE2wBFEAT--AG_jnMayrkFdYwOSHd3OF8ilmHPyvdmncGfTg0EwxzZNadMc2zRLm0Xx6cnW5hJyn-zoQn6WiZoDcizch4UL3vvnb2wUoOKP-Xyoig</recordid><startdate>20021001</startdate><enddate>20021001</enddate><creator>Yanyu Wei</creator><creator>Baofu Jia</creator><creator>Gun-Sik Park</creator><creator>Young-Do Joo</creator><creator>Guofen Yu</creator><creator>Wenxiang Wang</creator><creator>Shenggang Liu</creator><creator>Uhm, H.S.</creator><general>IEEE</general><general>Institute of Electrical and Electronics Engineers</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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The first part of the paper concerns the wave properties of this structure in the case of a vacuum. The influence of the geometrical dimensions on dispersion characteristics and interaction impedance are investigated. The theoretical results reveal a very weak dispersion for the fundamental wave in the structure. The negative dispersion can be realized by a suitable selection of the structural parameters. The interaction impedance of the fundamental wave is about 10 /spl Omega/. The interaction impedance of the -1 space harmonic wave is much lower than that of the fundamental wave. Thus, the risk of backward wave oscillation is reduced. The software high frequency structure simulator (HFSS) is also used to calculate the dispersion property of the SWS. The simulation results from HFSS and the theoretical results agree well, which supports the theory. In the second part, a self-consistent linear theory of a coaxial inverted helical groove TWT is presented. The typical small signal gain per period is about 0.5 dB and the 3-dB small-signal gain bandwidth can exceed 25% with a 33-dB gain of tube.</abstract><cop>New York, NY</cop><pub>IEEE</pub><doi>10.1109/TPS.2002.807498</doi><tpages>9</tpages></addata></record> |
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| subjects | Applied sciences Bandwidth Coaxial components Coupling circuits Dispersions Electronic tubes, masers Electronics Exact sciences and technology Frequency Gain Grooves Helical Impedance Laboratories Microwave tubes (eg, klystrons, magnetrons, traveling-wave, backward-wave tubes, etc.) Microwaves Noise levels Physics Physics of gases, plasmas and electric discharges Physics of plasmas and electric discharges Plasma interactions (nonlaser) Plasma interactions with antennas plasma-filled waveguides Signal analysis Simulation Structural engineering Theory Traveling wave tubes Wideband |
| title | Theory of high-power wide-band traveling-wave tube using coaxial inverted helical groove slow-wave structure |
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