The purpose of this technical note is to show the comparison between the measured and simulated patterns of the feed horns at 30 and 44 GHz

SANDRI, MAURA

VILLA, Fabrizio

OA@INAF - Istituto Nazionale di Astrofisica

2003Publication Year2023-02-21T14:15:55ZAcceptance in OA@INAFComparison between tests and simulations on QM 30 GHz and 44 GHz feed hornsTitleSANDRI, MAURA; VILLA, FabrizioAuthorshttp://hdl.handle.net/20.500.12386/33686HandlePL-LFI-PST-TN-053Number IASF/CNR Sezione di BOLOGNA LFI Project System Team Planck LFI   TITLE: COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS DOC. TYPE: TECHNICAL NOTE PROJECT REF.: PL-LFI-PST-TN-053 PAGE:  I  of IV, 34 ISSUE/REV.: 1.0 DATE:  December, 2003    Prepared by  M. SANDRI F.VILLA LFI Project System Team Date: Signature: December 18th, 2003   _____________________  Checked by M.BERSANELLI  LFI Instrument Scientist Date: Signature: December 18th, 2003  _____________________  Agreed by  C. BUTLER LFI Program Manager  Date: Signature: December 18th, 2003  ____________________   Approved by N. MANDOLESI LFI Principal Investigator Date: Signature: December 18th, 2003  ____________________   COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page: PL-LFI-PST-TN-0531.0December 2003ii IASF/CNR – Sezione di BOLOGNA LFI Project System Team  DISTRIBUTION LIST Recipient Company / Institute E-mail address SentR.C. BULTER IASF/CNR – Bologna bulter@bo.iasf.cnr.it YES N. MANDOLESI IASF/CNR – Bologna mandolesi@bo.iasf.cnr.it YES M. BERSANELLI UNIMI – Milano Marco.Bersanelli@uni.mi.astro.it YES     M. BALASINI LABEN – Vimodrone balasini.m@laben.it YES P. BATTAGLIA LABEN – Vimodrone battaglia.p@laben.it YES G. CAFAGNA LABEN – Vimodrone cafagna.g@laben.it YES O. D'ARCANGELO IFP/CNR – Milano ocleto@ifp.cnr.it YES L. FIGINI IFP/CNR – Milano figini@ifp.cnr.it YES P. GUZZI LABEN – Vimodrone guzzi.p@laben.it YES F. MONZANI LABEN – Vimodrone monzani.f@laben.it YES R. NESTI CAISMI/CNR – Firenze nesti@arcetri.astro.it YES E. PAGANA CONS – LABEN   A. SIMONETTO IFP/CNR – Milano simonetto@ifp.cnr.it YES C. SOZZI IFP/CNR – Milano sozzi@ifp.cnr.it YES         LFI SPCC  IASF/CNR – Bologna lfispcc@bo.iasf.cnr.it YES                                                                  COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page: PL-LFI-PST-TN-0531.0December 2003iii IASF/CNR – Sezione di BOLOGNA LFI Project System Team  CHANGE RECORD  Issue Date Sheet Description of Change Release1.0 Dec. 2003 All First Issue of the Document ===                                                                                                                                                                  COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page: PL-LFI-PST-TN-0531.0December 2003iv IASF/CNR – Sezione di BOLOGNA LFI Project System Team  TABLE OF CONTENTS 1 INTRODUCTION AND SCOPE ........................................................................................................... 1 2 APPLICABLE DOCUMENTS .............................................................................................................. 2 3 REFERENCE DOCUMENTS................................................................................................................ 2 4 30 GHZ FEED HORN............................................................................................................................. 3 5 44 GHZ FEED HORN........................................................................................................................... 22          COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 20031 IASF/CNR – Sezione di BOLOGNA LFI Project System Team  1 INTRODUCTION AND SCOPE The purpose of this technical note is to show the comparison between the measured and simulated patterns of the feed horns at 30 and 44 GHz.                                             COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 20032 IASF/CNR – Sezione di BOLOGNA LFI Project System Team  2 APPLICABLE DOCUMENTS [AD 1] PLANCK−LFI: FEED HORNS REQUIREMENT SPECIFICATION, PL-LFI-PST-SP-005, Issue 2, 2002 [AD 2] PLANCK−LFI: TESTS ON QM 30 GHz FEEDHORN, Part. No. 700100401, 2003 [AD 3] PLANCK−LFI: TESTS ON QM 44 GHz FEEDHORN, Part. No. 700100405, 2003 3 REFERENCE DOCUMENTS [RD 1] LFI detector data processing, H-P-3-ASP-TN-0517, D. Dubruel                               COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 20033 IASF/CNR – Sezione di BOLOGNA LFI Project System Team  4 30 GHz FEED HORN  The feed horn pattern was computed using GRASP8 and the source was specified by its spherical wave expansion provided by Alcatel Space Industriesc [RD 1]. The feed horn simulated directivity is 21.68 dBi and the ET is specified to be 30 dB ± 1 dB at 22°, at the center frequency [AD 1]. Both the near field and the far field were computed. The near field distance set in the simulations is equal to the distance between the source and the target in the measurements, in order to obtain comparable results. The measurements were carried out at the IFP [AD 2].   In Tab. 1 a comparison between the measured Edge Taper and the simulated one (in the far and near field, respectively) is reported. In figures from page 3 to page 20, the feed horn patterns are shown, in amplitude and phase. The solid red line represents the simulated data and the blu asterisks are the measured data. In the title of each plot an indication of the measured component and plane is reported, together with a label identifying the field computed (NF: near field, FF: far field).     Plane Freq (GHz) ET sff (dB@22°) ET snf (dB@22°) ET m (dB@22°)      E− plane 0° 27 -18.57 -18.12 -19.06  30 -30.42 -27.92 -28.81  33 -41.00 -36.19 -36.37           E− plane 180° 27 -18.57 -18.12 -18.95  30 -30.42 -27.92 -28.76  33 -41.00 -36.19 -34.25           H− plane 0° 27 -18.70 -18.23 -19.24  30 -26.92 -25.92 -26.89  33 -39.80 -34.15 -35.19           H− plane 180° 27 -18.70 -18.23 -18.96  30 -26.92 -25.92 -26.89  33 -39.80 -34.15 -34.57           +45° plane 27 -18.64 -18.17 -18.88  30 -28.64 -27.01 -27.58  33 -41.07 -35.22 -35.16           −45° plane 0° 27 -18.64 -18.17 -18.98  30 -28.64 -27.01 -27.91  33 -41.07 -35.22 -35.10      Tab. 1 ET sff: Edge Taper of the simulated far field, ET snf: Edge Taper of the simulated near field (94 cm), ET m: Edge Taper of the measured field, interpolated at 22°.  COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 20034 IASF/CNR – Sezione di BOLOGNA LFI Project System Team    COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 20035 IASF/CNR – Sezione di BOLOGNA LFI Project System Team     COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 20036 IASF/CNR – Sezione di BOLOGNA LFI Project System Team                     COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 20037 IASF/CNR – Sezione di BOLOGNA LFI Project System Team     COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 20038 IASF/CNR – Sezione di BOLOGNA LFI Project System Team     COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 20039 IASF/CNR – Sezione di BOLOGNA LFI Project System Team                     COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 200310 IASF/CNR – Sezione di BOLOGNA LFI Project System Team     COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 200311 IASF/CNR – Sezione di BOLOGNA LFI Project System Team     COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 200312 IASF/CNR – Sezione di BOLOGNA LFI Project System Team                     COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 200313 IASF/CNR – Sezione di BOLOGNA LFI Project System Team     COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 200314 IASF/CNR – Sezione di BOLOGNA LFI Project System Team     COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 200315 IASF/CNR – Sezione di BOLOGNA LFI Project System Team                     COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 200316 IASF/CNR – Sezione di BOLOGNA LFI Project System Team     COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 200317 IASF/CNR – Sezione di BOLOGNA LFI Project System Team     COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 200318 IASF/CNR – Sezione di BOLOGNA LFI Project System Team                     COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 200319 IASF/CNR – Sezione di BOLOGNA LFI Project System Team     COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 200320 IASF/CNR – Sezione di BOLOGNA LFI Project System Team     COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 200321 IASF/CNR – Sezione di BOLOGNA LFI Project System Team                     COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 200322 IASF/CNR – Sezione di BOLOGNA LFI Project System Team  5 44 GHz FEED HORN The feed horn pattern was computed using GRASP8 and the source was specified by its spherical wave expansion provided by Alcatel Space Industriesc [RD 1]. The feed horn simulated directivity is 21.95 dBi and the ET is specified to be 30 dB ± 1 dB at 22°, at the center frequency [AD 1]. Both the near field and the far field were computed. The near field distance set in the simulations is equal to the distance between the source and the target in the measurements, in order to obtain comparable results. The measurements were carried out at the IFP [AD 3].   In Tab. 2 a comparison between the measured Edge Taper and the simulated one (in the far and near field, respectively) is reported. In figures from page 22 to page 34, the feed horn patterns are shown, in amplitude and phase. The solid red line represent the simulated data and the blu asterisks are the measured data. In the title of each plot an indication of the measured component and plane is reported, together with a label identifying the field computed (NF: near field, FF: far field).      Plane Freq (GHz) ET sff (dB@22°) ET snf (dB@22°) ET m (dB@22°)      E− plane 0° 39.6 -21.27 -20.63 -21.03  44.0 -32.55 -30.70 -30.65  48.8 -39.63 -43.73 -48.41           E− plane 180° 39.6 -21.27 -20.63 -21.10  44.0 -32.55 -30.70 -30.67  48.8 -39.63 -43.73 -47.42           H− plane 0° 39.6 -21.10 -20.49 -21.50  44.0 -28.88 -27.68 -28.75  48.8 -36.47 -33.95 -36.21           +45° plane 39.6 -21.19 -20.56 -21.18  44.0 -30.52 -29.07 -29.69  48.8 -52.81 -42.51 -41.36           −45° plane 0° 39.6 -21.19 -20.56 -21.28  44.0 -30.52 -29.07 -29.66  48.8 -52.81 -42.51 -43.30      Tab. 2 ET sff: Edge Taper of the simulated far field, ET snf: Edge Taper of the simulated near field (98 cm), ET m: Edge Taper of the measured field, interpolated at 22°.      COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 200323 IASF/CNR – Sezione di BOLOGNA LFI Project System Team     COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 200324 IASF/CNR – Sezione di BOLOGNA LFI Project System Team     COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 200325 IASF/CNR – Sezione di BOLOGNA LFI Project System Team     COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 200326 IASF/CNR – Sezione di BOLOGNA LFI Project System Team     COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 200327 IASF/CNR – Sezione di BOLOGNA LFI Project System Team     COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 200328 IASF/CNR – Sezione di BOLOGNA LFI Project System Team     COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 200329 IASF/CNR – Sezione di BOLOGNA LFI Project System Team     COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 200330 IASF/CNR – Sezione di BOLOGNA LFI Project System Team     COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 200331 IASF/CNR – Sezione di BOLOGNA LFI Project System Team     COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 200332 IASF/CNR – Sezione di BOLOGNA LFI Project System Team     COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 200333 IASF/CNR – Sezione di BOLOGNA LFI Project System Team     COMPARISON BETWEEN TESTS AND SIMULATIONS ON QM 30 GHz AND 44 GHz FEED HORNS Document No.: Issue/Rev. No.: Date: Page : PL-LFI-PST-TN-0531.0December 200334 IASF/CNR – Sezione di BOLOGNA LFI Project System Team    

Comparison between tests and simulations on QM 30 GHz and 44 GHz feed horns

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Comparison between tests and simulations on QM 30 GHz and 44 GHz feed horns

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