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Antennas_CD-ROM_Walnut_Creek_September_1996.iso
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cros.asc
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1996-06-30
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8KB
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175 lines
2 ON ERROR GOTO 60000
3 CLS
10 PRINT " **************************************************************"
20 PRINT " * CROSS ANTENNAS *"
30 PRINT " * REFERENCE- ROEDERER, IEEE TRANS ANT. & PROP., MAY 1990 *"
40 PRINT " * PROGRAM BY R.P. HAVILAND, W4MB *"
50 PRINT " * COPYRGHT 1990 *"
60 PRINT " * MINILAB BOOKS, DAYTONA BEACH, FL 32121-1086 *"
70 PRINT " **************************************************************"
80 DEF FNP(X)=INT(100*X+.5)/100
90 MTOIN=39.37
200 PRINT " A CROSS ANTENNA IF FORMED OF THREE OR MORE IDENTICAL U-SHAPED"
210 PRINT " ARMS FACING A COMMON CENTER, WITH ADJACENT ENDS JOINED."
220 PRINT " THE LONG SIDES ARE ONE-HALF WAVE LONG, AND THE SHORT SIDES"
230 PRINT " HAVE A LENGTH OF 360 DEGREES/NO. OF ARMS."
240 PRINT " THE CROSS MAY BE FED AT THE CENTER OF ANY SIDE, GIVING SIMULTANEOUS"
250 PRINT " H AND V POLARIZATION. IT MAY BE FED AGAINST A REFLECTOR, WITH"
260 PRINT " A LOAD RESISTOR AT THE END AWAY FROM THE FEED POINT, GIVING"
270 PRINT " CIRCULAR POLARIZATION."
280 PRINT
400 PRINT " ENTER 1- SEE DESIGN SKETCH"
410 PRINT " 2- DO PROTOTYPE DESIGN"
420 PRINT " 3- SCALE DESIGN TO NEW FREQUENCY"
430 PRINT " 4- PRINTOUT DESIGN DATA
440 PRINT " 5- QUIT
450 INPUT TEM
460 IF TEM<1 OR TEM >5 THEN 400
470 ON TEM GOSUB 1000,2000,3000,4000,50000
480 CLS
490 GOTO 400
1000 CLS
1010 PRINT " SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS"
1020 PRINT " S S"
1030 PRINT " S CCCCC S STANDING-WAVE"
1040 PRINT " S C C S FOUR-ARM CROSS"
1050 PRINT " S C C S S- REFLECTOR SCREEN EDGE"
1060 PRINT " S C C S C- CONDUCTOR"
1070 PRINT " S CCCCCCCC CCCCCCCC S F- BALANCED FEED"
1080 PRINT " S C C S"
1090 PRINT " S CCCCCCCC CCCFFCCC S RADIATION IS NORMAL TO"
1100 PRINT " S C C S REFLECTOR, AND IS"
1110 PRINT " S C C S BOTH H AND V POLARIZED"
1120 PRINT " S C C S"
1130 PRINT " S CCCCC S"
1140 PRINT " S S"
1150 PRINT " SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS"
1160 PRINT
1170 INPUT "PRESS RETURN FOR MORE";T$
1400 CLS
1410 PRINT " SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS"
1420 PRINT " S S"
1430 PRINT " S CCCCC S TRAVELING-WAVE"
1440 PRINT " S C C S FOUR-ARM CROSS"
1450 PRINT " S C C S S- REFLECTOR SCREEN EDGE"
1460 PRINT " S C C S C- CONDUCTOR"
1470 PRINT " S CCCCCCCC CCCCCCCC S F- FEED AGAINST SCREEN"
1480 PRINT " S C C S R- RESISTOR TO SCREEN"
1490 PRINT " S CCCCCCCC CCCCCCCC S NOTE UNBALANCED FEED"
1500 PRINT " S C C S"
1510 PRINT " S C C S RADIATION IS NORMAL TO"
1520 PRINT " S C C S REFLECTOR, AND IS"
1530 PRINT " S CF RC S CIRCULARY POLARIZED"
1540 PRINT " S S"
1550 PRINT " SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS"
1560 PRINT
1570 INPUT "PRESS RETURN FOR MORE";T$
1999 RETURN
2000 CLS
2010 PRINT " DATA FOR 4-ARM PROTOTYPE
2020 PRINT
2030 PRINT " LENGTH LONG ARMS= 0.5 METER"
2040 PRINT " LENGTH SHORT ARMS= 0.25 METER"
2050 PRINT " CONDUCTOR DIAMETER= 0.012 METER"
2060 PRINT " RADIATOR-SCREEN SPACING= 0.2 METER"
2070 PRINT " MINIMUM REFLECTOR SCREEN SIZE- 1.5 BY 1.5 WAVELANGTHS
2080 PRINT " (INFINITE GROUND-PLANE USED IN PROTOTYPE ANALYSIS)"
2100 PRINT
2110 PRINT " PERFORMANCE OF STANDING WAVE VERSION"
2120 PRINT " FREQUENCY OF MAXIMUM GAIN- 320 MHZ"
2130 PRINT " MAXIMUM GAIN- 12.8 DB ISOTROPIC, NORMAL TO SCREEN PLANE"
2140 PRINT " 3 DB GAIN BANDWIDTH- 40 MHZ"
2150 PRINT " BEAMWIDTH-42 DEGREES"
2160 PRINT " DRIVE RESISTANCE= 180 +/- 20 OHMS OVER BANDWIDTH"
2170 PRINT " REACTANCE= -25 +/- 25 OHMS OVER BANDWIDTH"
2180 PRINT " MAJOR LOBE GAIN EXCEEDS 7.5 DB OVER FREQUENCY RANGE 75-475 MHZ"
2190 PRINT
2220 INPUT " PRESS RETURN FOR MORE";T$
2400 PRINT
2410 PRINT " PERFORMANCE OF CIRCULARY POLARIZED VERSION"
2420 PRINT " FREQUENCY OF PURELY CIRCULAR POLARIZATION- 307 MHZ"
2430 PRINT " GAIN AT THIS FREQUENCY- 11.5 DB ISOTROPIC"
2440 PRINT " DRIVE RESISTANCE- 290 OHMS
2450 PRINT " REACTANCE- 40 OHMS"
2460 PRINT
2500 PRINT " THESE VALUES ARE FOR A LOAD RESISTANCE OF 168 OHMS"
2510 PRINT " AND WILL VARY WITH LOAD RESISTANCE AND SPACING FROM SCREEN"
2520 PRINT
2530 INPUT " PRESS RETURN FOR MORE";T$
2999 RETURN
3000 INPUT " ENTER OPERATING FREQUENCY, MHZ";FO
3010 IF FO=<0 THEN 400
3020 LAM=299.8/FO
3030 LAMIN=LAM*39.37
3040 RATCP=307/FO
3050 RATSW=320/FO
3060 PRINT " WAVELENGTH=";FNP(LAM);"METERS"
3070 PRINT " =";FNP(LAMIN);"INCHES"
3100 INPUT " ENTER 1=CIRCULAR POLARIZED, 2- STANDING WAVE TYPE";TCODE
3110 IF TCODE<1 OR TCODE>2 THEN 3100
3120 IF TCODE=1 THEN RAT=RATCP
3130 IF TCODE=2 THEN RAT=RATSW
3180 PRINT
3200 LLONG=.5*RAT
3210 LLONGIN=LLONG*MTOIN
3220 LSHORT=.25*RAT
3230 LSHORTIN=LSHORT*MTOIN
3240 SEP=.2*RAT
3250 SEPIN=SEP*RAT
3260 DIA=.012*RAT
3270 DIAIN=DIA*MTOIN
3300 PRINT
3310 PRINT " LONG ARM LENGTH=";FNP(LLONG);"METER"
3320 PRINT " =";FNP(LLONGIN);"INCHES"
3330 PRINT " SHORT ARM LENGTH=";FNP(LSHORT);"METER"
3340 PRINT " =";FNP(LSHORTIN);"INCHES
3350 PRINT " ELEMENT-SCREEN SPACING=";FNP(SEP);"METER"
3360 PRINT " =";FNP(SEPIN);"INCHES"
3370 PRINT " ELEMENT DIAMETER=";DIA;"METER"
3380 PRINT " =";FNP(DIAIN);"INCHES"
3390 PRINT " MINIMUM SCREEN SIZE=";FNP(1.5*LAM);"METERS SQUARE"
3400 PRINT " =";FNP(1.5*LAMIN);"INCHES SQUARE"
3500 IF TCODE<>1 THEN 3600
3510 PRINT " LOAD RESISTOR= 168 OHMS"
3520 PRINT " WITH A DISSIPATION RATION OF 5 TO 10 PERCENT OF INPUT POWER."
3600 PRINT " FOR PERFORMANCE VALUES SEE ROUTINE 2"
3610 PRINT
3990 INPUT " PRESS RETURN TO CONTINUE";T$
3999 RETURN
4000 INPUT " PRESS RETURN FOR ELEMENT SKETCH AND DIMENSIONS";T$
4010 LPRINT " LONG ARM LENGTH=";FNP(LLONG);"METER"
4020 LPRINT " =";FNP(LLONGIN);"INCHES"
4030 LPRINT " SHORT ARM LENGTH=";FNP(LSHORT);"METER"
4040 LPRINT " =";FNP(LSHORTIN);"INCHES
4050 LPRINT " ELEMENT-SCREEN SPACING=";FNP(SEP);"METER"
4060 LPRINT " =";FNP(SEPIN);"INCHES"
4070 LPRINT " ELEMENT DIAMETER=";DIA;"METER"
4080 LPRINT " =";FNP(DIAIN);"INCHES"
4090 LPRINT " MINIMUM SCREEN SIZE=";FNP(1.5*LAM);"METERS SQUARE"
4100 LPRINT " =";FNP(1.5*LAMIN);"INCHES SQUARE"
4110 LPRINT " FOR TRAVELING WAVE VERSION, OPEN SHORT ARM, GENERATOR/LOAD TO ENDS."
4120 LPRINT " LOAD RESISTOR= 168 OHMS"
4130 LPRINT " WITH A DISSIPATION RATION OF 5 TO 10 PERCENT OF INPUT POWER."
4200 LPRINT
4210 LPRINT " PERFORMANCE OF STANDING WAVE VERSION"
4220 LPRINT " FREQUENCY OF MAXIMUM GAIN-";320/RAT;"MHZ"
4230 LPRINT " MAXIMUM GAIN- 12.8 DB ISOTROPIC, NORMAL TO SCREEN PLANE"
4240 LPRINT " 3 DB GAIN BANDWIDTH- 40 MHZ"
4250 LPRINT " BEAMWIDTH-42 DEGREES"
4260 LPRINT " DRIVE RESISTANCE= 180 +/- 20 OHMS OVER BANDWIDTH"
4270 LPRINT " REACTANCE= -25 +/- 25 OHMS OVER BANDWIDTH"
4280 LPRINT " MAJOR LOBE GAIN EXCEEDS 7.5 DB OVER FREQUENCY RANGE 75-475 MHZ"
4400 LPRINT
4410 LPRINT " PERFORMANCE OF CIRCULARY POLARIZED VERSION"
4420 LPRINT " FREQUENCY OF PURELY CIRCULAR POLARIZATION-";307/RAT;"MHZ"
4430 LPRINT " GAIN AT THIS FREQUENCY- 11.5 DB ISOTROPIC"
4440 LPRINT " DRIVE RESISTANCE- 290 OHMS
4450 LPRINT " REACTANCE- 40 OHMS"
4460 LPRINT
4500 LPRINT " THESE VALUES ARE FOR A LOAD RESISTANCE OF 168 OHMS"
4510 LPRINT " AND WILL VARY WITH LOAD RESISTANCE AND SPACING FROM SCREEN"
4600 RETURN
50000 END
60000 PRINT "ERROR";ERR;"AT LINE";ERL
60010 STOP