1 ************************************* * * * * * OHIO STATE UNIVERSITY * * ANTENNA ANALYSIS PROGRAM * * MODIFIED FOR USE AT * * NAVAL POSTGRADUATE SCHOOL * * 17 JULY 1974 * * * * * * FURTHER MODIFIED JULY 1989 * * FOR USE ON * * PC * WORKSTATIONS * MAINFRAMES * * * * VERSION 3.0 * * (JANUARY 1998) * * * ************************************* C AN EXAMPLE PROBLEM C C V ANTENNA C DATA CARDS 1 WIRE(RADIUS=1M) 2 GEOM(0,-.18,+.18/0,-.09,+.09/0,0,0/0,0.09,.09/0,.18,.18) 3 DESC(1-2/2-3/3-4/4-5) 4 FEED(3) 5 OUTPUT(FARF=45,50,65,80/STEP=5) 6 CHANGE 0 ***************************** * * * INPUT DATA * * * ***************************** WIRE RADIUS (METERS) .10000E-02 WIRE INSULATED (NO/YES) NO EXTERIOR MEDIUM FREE SPACE GROUND PLANE (NO/YES) NO WIRE STRUCTURE SEG NODE LOCATION NODE LOCATION NO. NO. X Y Z NO. X Y Z 1 1 .00000E+00 -.18000E+00 .18000E+00 2 .00000E+00 -.90000E-01 .90000E-01 2 2 .00000E+00 -.90000E-01 .90000E-01 3 .00000E+00 .00000E+00 .00000E+00 3 3 .00000E+00 .00000E+00 .00000E+00 4 .00000E+00 .90000E-01 .90000E-01 4 4 .00000E+00 .90000E-01 .90000E-01 5 .00000E+00 .18000E+00 .18000E+00 ANTENNA FEEDS NODE VOLTS NO. REAL IMAGINARY 3 .10000E+01 .00000E+00 ***************************** * * * OUTPUT REQUESTED * * * ***************************** FAR FIELDS FOR PHI VARYING FROM 45.0 TO 50.0AND THETA VARYING FROM 65.0 TO 80.0 IN STEPS OF 5.0 DEGREES. 0 1 ***************************** * * * ANTENNA * * CALCULATIONS * * * ***************************** THE INPUT IMPEDANCE AT NODE 3 IS 46.2781800 + J 26.5542100 THE RADIATION EFFICIENCY (PERCENT) IS 99.9944700 THE TIME-AVERAGE POWER INPUT IS .16256E-01 THE ANTENNA IMPEDANCE IS 46.2781800 +J 26.5542100 1 ***************************** * * * FAR FIELD * * CALCULATIONS * * * ***************************** ELECTRIC FIELD INTENSITY DEGREES POWER GAIN THETA PHI THETA PHI THETA PHI REAL IMAG MAGN PHASE REAL IMAG MAGN PHASE 65.0 45.0 .2144E+00 .6663E+00 -.2811E+00 -.1596E+00 .3233E+00 -150.4 -.2148E+00 -.5278E+00 .5699E+00 -112.1 70.0 45.0 .1816E+00 .6635E+00 -.2802E+00 -.9983E-01 .2975E+00 -160.4 -.2315E+00 -.5194E+00 .5686E+00 -114.0 75.0 45.0 .1554E+00 .6611E+00 -.2723E+00 -.3959E-01 .2752E+00 -171.7 -.2484E+00 -.5104E+00 .5676E+00 -116.0 80.0 45.0 .1365E+00 .6591E+00 -.2571E+00 .1988E-01 .2579E+00 175.6 -.2654E+00 -.5008E+00 .5668E+00 -117.9 65.0 50.0 .2482E+00 .5408E+00 -.3028E+00 -.1710E+00 .3478E+00 -150.6 -.1939E+00 -.4754E+00 .5134E+00 -112.2 70.0 50.0 .2101E+00 .5378E+00 -.3017E+00 -.1066E+00 .3200E+00 -160.5 -.2088E+00 -.4674E+00 .5119E+00 -114.1 75.0 50.0 .1799E+00 .5352E+00 -.2931E+00 -.4190E-01 .2961E+00 -171.9 -.2238E+00 -.4591E+00 .5107E+00 -116.0 80.0 50.0 .1581E+00 .5331E+00 -.2767E+00 .2190E-01 .2776E+00 175.5 -.2388E+00 -.4503E+00 .5097E+00 -117.9 0 1 CONTINUE EXECUTION WITH THE FOLLOWING ADDITIONS AND/OR CHANGES DATA CARDS 7 OUTPUT(BIST=45,45,45,45/BACK=0,0,10,12) 8 OUTPUT(CURRENT) 9 CHANGE 0 ***************************** * * * INPUT DATA * * * ***************************** ANTENNA FEEDS NODE VOLTS NO. REAL IMAGINARY 3 .10000E+01 .00000E+00 ***************************** * * * OUTPUT REQUESTED * * * ***************************** STRUCTURE CURRENTS BACKSCATTERING FOR PHI VARYING FROM .0 TO .0 AND THETA VARYING FROM 10.0 TO 12.0 IN STEPS OF 1.0 DEGREES. BISTATIC SCATTERING FOR PHI VARYING FROM 45.0 TO 45.0 AND THETA VARYING FROM 45.0 TO 45.0 IN STEPS OF 1.0 DEGREES. 0 1 ***************************** * * * ANTENNA * * CALCULATIONS * * * ***************************** THE INPUT IMPEDANCE AT NODE 3 IS 46.2781800 + J 26.5542100 ANTENNA BRANCH CURRENTS NORMALIZED NORMALIZED SEG NODE REAL IMAGINARY MAGNITUDE MAGNITUDE PHASE NODE REAL IMAGINARY MAGNITUDE MAGNITUDE PHASE 1 1 .00000E+00 .00000E+00 .00000E+00 .00000E+00 .0 2 .12023E-01 -.79176E-02 .14396E-01 .76810E+00 -33.4 2 2 .12023E-01 -.79176E-02 .14396E-01 .76810E+00 -33.4 3 .16256E-01 -.93278E-02 .18742E-01 .10000E+01 -29.8 3 3 .16256E-01 -.93278E-02 .18742E-01 .10000E+01 -29.8 4 .12023E-01 -.79176E-02 .14396E-01 .76810E+00 -33.4 4 4 .12023E-01 -.79176E-02 .14396E-01 .76810E+00 -33.4 5 .00000E+00 .00000E+00 .00000E+00 .00000E+00 .0 0 THE RADIATION EFFICIENCY (PERCENT) IS 99.9944700 THE TIME-AVERAGE POWER INPUT IS .16256E-01 THE ANTENNA IMPEDANCE IS 46.2781800 +J 26.5542100 1 ***************************** * * * BACKSCATTERING * * CALCULATIONS * * * ***************************** BRANCH CURRENTS ASSOCIATED WITH PLANE-WAVE SCATTERING FOR THE INCIDENT ANGLES, PHI= .0 AND THETA= 10.0 CURRENTS INDUCED BY THE PHI POLARIZED WAVE NORMALIZED NORMALIZED SEG NODE REAL IMAGINARY MAGNITUDE MAGNITUDE PHASE NODE REAL IMAGINARY MAGNITUDE MAGNITUDE PHASE 1 1 .00000E+00 .00000E+00 .00000E+00 .00000E+00 .0 2 .31772E-02 -.49078E-03 .32148E-02 .73326E+00 -8.8 2 2 .31772E-02 -.49078E-03 .32148E-02 .73326E+00 -8.8 3 .43371E-02 -.64184E-03 .43843E-02 .10000E+01 -8.4 3 3 .43371E-02 -.64184E-03 .43843E-02 .10000E+01 -8.4 4 .31772E-02 -.49078E-03 .32148E-02 .73326E+00 -8.8 4 4 .31772E-02 -.49078E-03 .32148E-02 .73326E+00 -8.8 5 .00000E+00 .00000E+00 .00000E+00 .00000E+00 .0 0 CURRENTS INDUCED BY THE THETA POLARIZED WAVE NORMALIZED NORMALIZED SEG NODE REAL IMAGINARY MAGNITUDE MAGNITUDE PHASE NODE REAL IMAGINARY MAGNITUDE MAGNITUDE PHASE 1 1 .00000E+00 .00000E+00 .00000E+00 .00000E+00 .0 2 -.16843E-04 .28762E-04 .33331E-04 .99998E+00 120.4 2 2 -.16843E-04 .28762E-04 .33331E-04 .99998E+00 120.4 3 .70517E-09 .30616E-10 .70583E-09 .21176E-04 2.5 3 3 .70517E-09 .30616E-10 .70583E-09 .21176E-04 2.5 4 .16844E-04 -.28762E-04 .33332E-04 .10000E+01 -59.6 4 4 .16844E-04 -.28762E-04 .33332E-04 .10000E+01 -59.6 5 .00000E+00 .00000E+00 .00000E+00 .00000E+00 .0 0 BRANCH CURRENTS ASSOCIATED WITH PLANE-WAVE SCATTERING FOR THE INCIDENT ANGLES, PHI= .0 AND THETA= 11.0 CURRENTS INDUCED BY THE PHI POLARIZED WAVE NORMALIZED NORMALIZED SEG NODE REAL IMAGINARY MAGNITUDE MAGNITUDE PHASE NODE REAL IMAGINARY MAGNITUDE MAGNITUDE PHASE 1 1 .00000E+00 .00000E+00 .00000E+00 .00000E+00 .0 2 .31773E-02 -.49503E-03 .32156E-02 .73328E+00 -8.9 2 2 .31773E-02 -.49503E-03 .32156E-02 .73328E+00 -8.9 3 .43372E-02 -.64770E-03 .43853E-02 .10000E+01 -8.5 3 3 .43372E-02 -.64770E-03 .43853E-02 .10000E+01 -8.5 4 .31773E-02 -.49503E-03 .32156E-02 .73328E+00 -8.9 4 4 .31773E-02 -.49503E-03 .32156E-02 .73328E+00 -8.9 5 .00000E+00 .00000E+00 .00000E+00 .00000E+00 .0 0 CURRENTS INDUCED BY THE THETA POLARIZED WAVE NORMALIZED NORMALIZED SEG NODE REAL IMAGINARY MAGNITUDE MAGNITUDE PHASE NODE REAL IMAGINARY MAGNITUDE MAGNITUDE PHASE 1 1 .00000E+00 .00000E+00 .00000E+00 .00000E+00 .0 2 -.18454E-04 .31644E-04 .36631E-04 .99998E+00 120.2 2 2 -.18454E-04 .31644E-04 .36631E-04 .99998E+00 120.2 3 .78301E-09 .55290E-10 .78496E-09 .21428E-04 4.0 3 3 .78301E-09 .55290E-10 .78496E-09 .21428E-04 4.0 4 .18455E-04 -.31644E-04 .36632E-04 .10000E+01 -59.7 4 4 .18455E-04 -.31644E-04 .36632E-04 .10000E+01 -59.7 5 .00000E+00 .00000E+00 .00000E+00 .00000E+00 .0 0 BRANCH CURRENTS ASSOCIATED WITH PLANE-WAVE SCATTERING FOR THE INCIDENT ANGLES, PHI= .0 AND THETA= 12.0 CURRENTS INDUCED BY THE PHI POLARIZED WAVE NORMALIZED NORMALIZED SEG NODE REAL IMAGINARY MAGNITUDE MAGNITUDE PHASE NODE REAL IMAGINARY MAGNITUDE MAGNITUDE PHASE 1 1 .00000E+00 .00000E+00 .00000E+00 .00000E+00 .0 2 .31774E-02 -.49969E-03 .32165E-02 .73330E+00 -8.9 2 2 .31774E-02 -.49969E-03 .32165E-02 .73330E+00 -8.9 3 .43373E-02 -.65412E-03 .43863E-02 .10000E+01 -8.6 3 3 .43373E-02 -.65412E-03 .43863E-02 .10000E+01 -8.6 4 .31774E-02 -.49969E-03 .32165E-02 .73330E+00 -8.9 4 4 .31774E-02 -.49969E-03 .32165E-02 .73330E+00 -8.9 5 .00000E+00 .00000E+00 .00000E+00 .00000E+00 .0 0 CURRENTS INDUCED BY THE THETA POLARIZED WAVE NORMALIZED NORMALIZED SEG NODE REAL IMAGINARY MAGNITUDE MAGNITUDE PHASE NODE REAL IMAGINARY MAGNITUDE MAGNITUDE PHASE 1 1 .00000E+00 .00000E+00 .00000E+00 .00000E+00 .0 2 -.20044E-04 .34526E-04 .39922E-04 .99998E+00 120.1 2 2 -.20044E-04 .34526E-04 .39922E-04 .99998E+00 120.1 3 .79241E-09 .27539E-10 .79289E-09 .19860E-04 2.0 3 3 .79241E-09 .27539E-10 .79289E-09 .19860E-04 2.0 4 .20045E-04 -.34526E-04 .39923E-04 .10000E+01 -59.9 4 4 .20045E-04 -.34526E-04 .39923E-04 .10000E+01 -59.9 5 .00000E+00 .00000E+00 .00000E+00 .00000E+00 .0 0 BACKSCATTERING INCIDENT ELECTRIC FIELD POLARIZATION SCATTERING MATRIX PLANE (INCIDENT-SCATTERED) WAVE PHI-PHI PHI-THETA THETA-PHI THETA-THETA PHI THETA REAL IMAG REAL IMAG REAL IMAG REAL IMAG .0 10.0 .47449E-01 -.18107E+00 .12743E-07 -.28868E-07 .12719E-07 -.28462E-07 .93990E-04 .17889E-03 .0 11.0 .46998E-01 -.18128E+00 .14584E-07 -.30477E-07 .14786E-07 -.31223E-07 .11430E-03 .21566E-03 .0 12.0 .46503E-01 -.18150E+00 .14241E-07 -.33474E-07 .13874E-07 -.32191E-07 .13677E-03 .25562E-03 1 ***************************** * * * BISTATIC SCATTERING * * CALCULATIONS * * * ***************************** FOR BISTATIC SCATTERING THE INCIDENT PLANE WAVE IS PHI= .0 THETA= 12.0 BISTATIC ELECTRIC FIELD POLARIZATION SCATTERING MATRIX OBSERVATION (INCIDENT-SCATTERED) POINT PHI-PHI PHI-THETA THETA-PHI THETA-THETA PHI THETA REAL IMAG REAL IMAG REAL IMAG REAL IMAG 45.0 45.0 .17343E-01 -.12954E+00 -.14329E-01 -.98727E-01 .23252E-03 -.15151E-03 .74104E-03 .65082E-03 1 CONTINUE EXECUTION WITH THE FOLLOWING ADDITIONS AND/OR CHANGES C C CHANGE STRUCTURE SHAPE TO DIPOLE C DATA CARDS 10 GEOM(0,-.25,0/0,-.125,0/0,0,0/0,.125,0/0,.25,0) 11 PLOT(FARF/PHI=90) 12 GROUND(HEIGHT=.25/GOOD) 13 STOP 0 ***************************** * * * INPUT DATA * * * ***************************** GROUND PLANE (NO/YES) YES GROUND DIELECTRIC CONSTANT (RELATIVE) .30000E+02 GROUND CONDUCTIVITY (MHOS/METER) .20000E-01 ANTENNA HEIGHT (METERS) .25000E+00 WIRE STRUCTURE SEG NODE LOCATION NODE LOCATION NO. NO. X Y Z NO. X Y Z 1 1 .00000E+00 -.25000E+00 .00000E+00 2 .00000E+00 -.12500E+00 .00000E+00 2 2 .00000E+00 -.12500E+00 .00000E+00 3 .00000E+00 .00000E+00 .00000E+00 3 3 .00000E+00 .00000E+00 .00000E+00 4 .00000E+00 .12500E+00 .00000E+00 4 4 .00000E+00 .12500E+00 .00000E+00 5 .00000E+00 .25000E+00 .00000E+00 ANTENNA FEEDS NODE VOLTS NO. REAL IMAGINARY 3 .10000E+01 .00000E+00 ***************************** * * * OUTPUT REQUESTED * * * ***************************** PLOT FOR FAR FIELD PHI= 90.0 0 1 ***************************** * * * ANTENNA * * CALCULATIONS * * * ***************************** THE INPUT IMPEDANCE AT NODE 3 IS 94.1886100 + J 63.6245600 THE RADIATION EFFICIENCY (PERCENT) IS 99.9962500 THE TIME-AVERAGE POWER INPUT IS .72904E-02 THE ANTENNA IMPEDANCE IS 94.1886100 +J 63.6245600 1 ***************************** * * * FAR FIELD * * CALCULATIONS * * * ***************************** 0 1PHI ELECTRIC FIELD ANTENNA PATTERN FOR SPECIFIED PLANE. NORMALIZING FACTOR= .61273E-06 . . . . . . . . . . . . . . . . . . . 120 . . . 060 . . . . . .. . .. .. . .. . . . . . . . . . ... . . . . . . . . . . . . . . . . . . . . . . . . . . .. . * .. . . . . . . . . . . . . * . . . . . . . * . . . . . . . ..... . . . . . . . . . . * . . . . . . . . . . . * . . . . . 150 . . . . . . ************** . . 030 . . . . . * . **** . *** . . . . . . . * *** . . *** . . . . . . . . * **. . . *** . . . . . . . * ** . . . . ** . . . . . . ... . **** . . . * . . . . . . . . . . . . . * . . . . . . . . . . . ** . . . . . . . . . . . . . **. . . . . . . . . . . * . . . . . . . . . . . . . **. . . . . . . . . . . . . *. . . . . . . . . . . . . *. . . . . . . . . . . . . ** . . . . . . . . . . . . * . . . . . . . . . . . . . . * . . . . . . . . . . . . . . *. . . . . . . . . . . . . * . . . . . . . . . . . . . . * . . . . . . . . . . . . * . . . . . . . . . . . . * 180 1........4/5.......3/5.......2/5.......1/5........*........1/5.......2/5.......3/5.......4/5........* 000 . . . . . . . . . . . . * . . . . . . . . . . . . * . . . . . . . . . . . . . . * . . . . . . . . . . . . * . . . . . . . . . . . . . . *. . . . . . . . . . . . . . . * . . . . . . . . . . . . * . . . . . . . . . . . . ** . . . . . . . . . . . . *. . . . . . . . . . . . . *. . . . . . . . . . . . . **. . . . . . . . . . . * . . . . . . . . . . . . . **. . . . . . . . . . . ** . . . . . . . . . . . . . * . . . . . . ... . **** . . . * . . . . . . . * ** . . . . ** . . . . . . . * **. . . *** . . . . . . . * *** . . *** . . . . . . . * . **** . *** . 210 . . . . . . ************** . . 330 . . . . . . * . . . . . . . . . . . * . . . . . . . . . ..... . . . . . . . . * . . . . . . . * . . . . . . . . . . . .. . * .. . . . . . . . . . . . . . . . . . . .* . . . . . . . ... . . . . . . . . . .. . .. .. . .. . . . . . 240 . . . 300 . . . . . . . . . . . . . . . . . . . 1THET ELECTRIC FIELD ANTENNA PATTERN FOR SPECIFIED PLANE. NORMALIZING FACTOR= .95775E+00 . . . . . . . . . . . . . . . . . . . 120 . . . 060 . . . . . .. . .. .. . .. . . . . . . . . . ... . . . . . . . . . . . . . . . . . . . . . . . . . . .. . .. . . . . . . . . . . . . . . . . . . . . . . . . . . ..... . . . . . . . . . . . . . . . . . . . . . . . . . . 150 . . . . . . . . . 030 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . . ******* ******. . . . . . . . . . . **** . . *** . . . . . . . . *** . . . *** . . . . . . . . . .* . . . ** . . . . . . . .***. . . ** . . . . . . . . .* . . . . * . . . . . . . . ** . . . . ** . . . . . . . . ** . . . . ** . . . . . . . . . *. . . . * . . . . . . . . **. . . . . *. . . . . . . . . *. . . . . . *. . . . . . . . . * . . . . . . *. . . . . . . .**. . . . . *. . . . . . . . **. . . . . . * . . . . . . * . . . . . * . . . . . . * . . . . . * 180 1........4/5.......3/5.......2/5.......1/5........*........1/5.......2/5.......3/5.......4/5........* 000 . . . . . . * . . . . . * . . . . . . * . . . . . * . . . . . . . **. . . . . . * . . . . . . .**. . . . . *. . . . . . . . . * . . . . . . *. . . . . . . . . *. . . . . . *. . . . . . . . **. . . . . *. . . . . . . . . *. . . . * . . . . . . . . ** . . . . ** . . . . . . . . ** . . . . ** . . . . . . . . .* . . . . * . . . . . . . .***. . . ** . . . . . . . . . .* . . . ** . . . . . . . . *** . . . *** . . . . . . . . . . **** . . *** . . . . . . ... . . **************. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210 . . . . . . . . . 330 . . . . . . . . . . . . . . . . . . . . . . . . . . ..... . . . . . . . . . . . . . . . . . . . . . . . . . . .. . .. . . . . . . . . . . . . . . . . . . . . . . . . . . ... . . . . . . . . . .. . .. .. . .. . . . . . 240 . . . 300 . . . . . . . . . . . . . . . . . . .