Z45: A new 45-GHz band dual-polarization HEMT receiver for the NRO 45-m radio telescope

Nakamura Fumitaka; Ogawa Hideo; Yonekura Yoshinori; Kimura Kimihiko; Okada Nozomi; Kozu Minato; Hasegawa Yutaka; Tokuda Kazuki; Ochiai Tetsu; Mizuno Izumi; Dobashi Kazuhito; Shimoikura Tomomi; Kameno Seiji; Taniguchi Kotomi; Shinnaga Hiroko; Takano Shuro; Kawabe Ryohei; Nakajima Taku; Iono Daisuke; Kuno Nario; Onishi Toshikazu; Momose Munetake; Yamamoto Satoshi

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Z45: A new 45-GHz band dual-polarization HEMT receiver for the NRO 45-m radio telescope

机译：Z45：用于NRO 45-m射电望远镜的新型45-GHz波段双极化HEMT接收器

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Wedevelopedadual-linear-polarizationHEMT(HighElectronMobilityTransistor)amplifierreceiversystemofthe45-GHzband(hereafterZ45),andinstalleditintheNobeyama45-mradiotelescope.Thereceiversystemisdesignedtoconductpolarizationobservationsbytakingthecross-correlationoftwolinearlypolarizedcomponents,fromwhichweprocessfullStokesspectroscopy.WeaimtomeasurethemagneticfieldstrengththroughtheZeemaneffectoftheemissionlineofCCS(JNa€‰=a€‰43a€“32)towardpre-protostellarcores.Alinear-polarizationreceiversystemhasasmallercontributionofinstrumentalpolarizationcomponentstotheStokesVspectrathanthatofthecircularpolarizationsystem,sothatitiseasiertoobtaintheStokesVspectra.ThereceiverhasanRFfrequencyof42a€“46a€‰GHzandanintermediatefrequency(IF)bandof4a€“8a€‰GHz.Thetypicalnoisetemperatureisabout50a€‰K,andthesystemnoisetemperaturerangesfrom100to150a€‰Koverthefrequencyof42a€“46a€‰GHz.Thereceiversystemisconnectedtotwospectrometers,SAM45andPolariS.SAM45isahighlyflexibleFX-typedigitalspectrometerwithafinestfrequencyresolutionof3.81??kHz.PolariSisanewlydevelopeddigitalspectrometerwithafinestfrequencyresolutionof60??Hz,andwhichhasacapabilitytoprocessthefull-Stokesspectroscopy.Thehalf-powerbeamwidth(HPBW)wasmeasuredtobe37a€3at43a€‰GHz.ThemainbeamefficiencyoftheGaussianmainbeamwasderivedtobe0.72at43a€‰GHz.TheSiOmaserobservationsshowthatthebeampatternisreasonablyroundatabout10%ofthepeakintensityandtheside-lobelevelwaslessthan3%ofthepeakintensity.Finally,wepresentsomeexamplesofastronomicalobservationsusingZ45.

机译：Wedevelopedadual-线性polarizationHEMT（HighElectronMobilityTransistor）amplifierreceiversystemofthe45-GHzband（hereafterZ45），andinstalleditintheNobeyama45-mradiotelescope.Thereceiversystemisdesignedtoconductpolarizationobservationsbytakingthecross-correlationoftwolinearlypolarizedcomponents，fromwhichweprocessfullStokesspectroscopy.WeaimtomeasurethemagneticfieldstrengththroughtheZeemaneffectoftheemissionlineofCCS（JNA€‰=一个€‰43A€“32）towardpre-protostellarcores.Alinear-polarizationreceiversystemhasasmallercontributionofinstrumentalpolarizationcomponentstotheStokesVspectrathanthatofthecircularpolarizationsystem，sothatitiseasiertoobtaintheStokesVspectra.ThereceiverhasanRFfrequencyof42a “ 46a GHz GHz和4a 8a GHz的中频（IF）频段。典型噪声温度约为50 a K‰，系统噪声温度范围为42 a 46 GHz GHz的100至150 a K范围。接收器系统连接到两个光谱仪上，有一个高频率的FM频谱仪，SAM45和可配SPF的SPA。 solutionof3.81 ?? kHz.PolariSisanewlydevelopeddigitalspectrometerwithafinestfrequencyresolutionof60 ??赫兹，andwhichhasacapabilitytoprocessthefull-Stokesspectroscopy.Thehalf-powerbeamwidth（HPBW）wasmeasuredtobe37a€3at43a€‰GHz.ThemainbeamefficiencyoftheGaussianmainbeamwasderivedtobe0.72at43a€‰GHz.TheSiOmaserobservationsshowthatthebeampatternisreasonablyroundatabout10％ofthepeakintensityandtheside-lobelevelwaslessthan3％ofthepeakintensity.Finally，wepresentsomeexamplesofastronomicalobservationsusingZ45。

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《PASJ: Publications of the Astronomical Society of Japan》 |2015年第6期|共页
作者
Nakamura Fumitaka; Ogawa Hideo; Yonekura Yoshinori; Kimura Kimihiko; Okada Nozomi; Kozu Minato; Hasegawa Yutaka; Tokuda Kazuki; Ochiai Tetsu; Mizuno Izumi; Dobashi Kazuhito; Shimoikura Tomomi; Kameno Seiji; Taniguchi Kotomi; Shinnaga Hiroko; Takano Shuro; Kawabe Ryohei; Nakajima Taku; Iono Daisuke; Kuno Nario; Onishi Toshikazu; Momose Munetake; Yamamoto Satoshi;
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1. Z45: A new 45-GHz band dual-polarization HEMT receiver for the NRO 45-m radio telescope [J] . Nakamura Fumitaka, Ogawa Hideo, Yonekura Yoshinori, PASJ: Publications of the Astronomical Society of Japan . 2015,第6期

机译：Z45：用于NRO 45-m射电望远镜的新型45-GHz波段双极化HEMT接收器
2. A new 100-GHz band front-end system with a waveguide-type dual-polarization sideband-separating SIS receiver for the NRO 45-m radio telescope [J] . Nakajima T, Sakai T, Asayama S, PASJ: Publications of the Astronomical Society of Japan . 2008,第3期

机译：用于NRO 45-m射电望远镜的带有波导型双极化边带分离SIS接收器的新型100 GHz频带前端系统
3. A New 100-GHz Band Front-End System with a Waveguide-Type Dual-Polarization Sideband-Separating SIS Receiver for the NRO 45-m Radio Telescope [J] . Nakajima Taku, Sakai Takeshi, Asayama Shina€?ichiro, PASJ: Publications of the Astronomical Society of Japan . 2008,第3期

机译：用于NRO 45-m射电望远镜的具有波导类型双极化边带分离SIS接收器的新型100-GHz频带前端系统
4. Development of a Waveguide-Type Dual-Polarization Sideband-Separating SIS Receiver System in 100 GHz Band for the NRO 45-m Telescope [C] . Taku Nakajima, Takeshi Sakai, Shinichiro Asayama, International symposium on space terahertz technology;ISSTT 2008 . 2008

机译：NRO 45-m望远镜在100 GHz频段的波导型双极化边带分离SIS接收器系统的开发
5. Band-Pass Filter Feedback System for Use in AM Radio Receivers. [D] . Ford, Kevin Robert. 2011

机译：用于AM无线电接收机的带通滤波器反馈系统。
6. Experimental Verification of the Concept of Using LOFAR Radio-Telescopes as Receivers in Passive Radiolocation Systems [O] . Julia Kłos, Konrad Jędrzejewski, Aleksander Droszcz, 2021

机译：使用Lofar射频望远镜作为被动式放射系统中的接收器的实验验证
7. A New 100-GHz Band Front-End System with a Waveguide-Type Dual-Polarization Sideband-Separating SIS Receiver for the NRO 45-m Radio Telescope [O] . Taku Nakajima, Takeshi Sakai, Shin’ichiro Asayama, 2008

机译：一种新的100-GHz带前端系统，具有用于NRO 45-M射频望远镜的波导型双极化边带分离SIS接收器
8. Sensitivity Aspects of Radio Telescope Receivers for Astronomy [R] . Mallat, J. A. 1995

机译：用于天文学的射电望远镜接收器的灵敏度方面

Z45: A new 45-GHz band dual-polarization HEMT receiver for the NRO 45-m radio telescope

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