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Antennas_CD-ROM_Walnut_Creek_September_1996.iso
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w4mb
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vol2
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stda.asc
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1996-06-30
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6KB
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123 lines
2 ON ERROR GOTO 60000
3 CLS
10 PRINT " ***************************************************************"
20 PRINT " * STANDARD GAIN REFERENCE ANTENNA *"
30 PRINT " * REFERENCE- ARRL ANTENNA HANDBOOK *
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(1000*X+.5)/1000
90 PI=3.141592
200 PRINT " THIS PROGRAM GIVES DESIGN DATA FOR A 'STANDARD' OR 'REFERENCE' ANTENNA"
210 PRINT " FOR USE IN COMPARATIVE ANTENNA MEASUREMENTS."
220 PRINT " CAREFULLY CONSTRUCTED, THE GAIN WILL BE 7.7 +/- 0.25 DB ABOVE A DIPOLE."
230 PRINT " THE DESIGN IS NOT PRACTICAL BELOW ABOUT 140 MHZ"
240 PRINT " AND IS TROUBLESOME TO HANDLE BELOW 400 MHZ. THE PRECISION"
250 PRINT " REQUIRED LIMITS THE UPPER FREQUENCY TO 1500-2000 MHZ."
260 PRINT " FOR HIGHER FREQUENCIES USE A PRECISION HORN ANTENNA."
270 INPUT " SEE SCHEMATIC OF ANTENNA, Y/N";T$
290 IF T$="Y" THEN GOSUB 5000
400 PRINT
410 INPUT " ENTER DESIGN FREQUENCY, MHZ";FO
420 LAMDA=299.8/FO
430 LAMIN=LAMDA*39.37
440 CLS
450 PRINT " WAVELENGTH=";FNP(LAMDA);"METERS"
460 PRINT " =";FNP(LAMIN);"INCHES"
600 PRINT
610 PRINT " THE ANTENNA IS CONSTRUCTED ON A SQUARE REFLECTING SCREEN"
620 PRINT " ";FNP(LAMDA);"METERS ON A SIDE"
630 PRINT " OR";FNP(LAMIN);"INCHES SQUARE"
640 PRINT
650 PRINT " ABOVE ABOUT 400 MHZ, PRINTED CIRCUIT BOARD IS GOOD"
660 PRINT " FOR LOWER FREQUENCIES, COPPER SCREEN ON PLYWOOD IS SATISFACTORY"
800 PRINT
810 PRINT " AT EXACT CENTER OF SQUARE, INSTALL FEED TUBE,"
820 PRINT " OF 7/8 COPPER TUBING, SPLIT INTO TWO HALVES,
830 PRINT " WITH SLOT PARALLEL TO TRANSMISSION LINE IN SCHEMATIC.
840 PRINT " BOND TO GROUND PLANE."
850 PRINT " LENGTH OF FEED TUBE=";FNP(LAMDA/4-.003969);"METERS"
860 PRINT " =";FNP(LAMIN/4-.15625);"INCHES"
870 INPUT " PRESS RETURN TO CONTINUE";T$
1000 CLS:PRINT
1010 PRINT " TWO=WIRE TRANSMISSION LINE IS CONSTRUCTED OF 5/16 COPPER TUBING"
1020 PRINT " BENT INTO TWO U's, WITH,"
1030 PRINT " BOTTOM OF U=";FNP(LAMDA/2);"METERS"
1040 PRINT " (C-C) =";FNP(LAMIN/2);"INCHES"
1050 PRINT " AND SIDES=";FNP(LAMDA/4);"METERS"
1060 PRINT " (END TO C) =";FNP(LAMIN/4);"INCHES"
1100 PRINT " BOND EXACT CENTER OF U AT TO FEED TUBE HALVES,"
1110 PRINT " WITH LINE SEPARATION 11/16 INCHES CENTER-CENTER."
1120 PRINT " BOND ENDS OF U's TO GROUND PLANE, MAINTAINING SPACING."
1130 PRINT " DIPOLES ARE 1/2 WAVELENGTH LONG, END-TO-END"
1200 PRINT " LENGTH OA=";FNP(LAMDA/2);"METERS"
1210 PRINT " =";FNP(LAMIN)/2;"INCHES"
1220 PRINT " AND ARE OF 3/8 INCH DIAMETER COPPER TUBING"
1230 PRINT " CUT TO LENGTH=";FNP(LAMDA/4-.0127);"METERS
1240 PRINT " =";FNP(LAMIN/4-.5);"INCHES"
1250 PRINT " BOND TO TRANSMISSION LINE AT BENDS."
1260 INPUT " PRESS RETURN TO CONTINUE";T$
1400 CLS: PRINT
1410 PRINT " AN ADJUSTABLE ASSEMBLY JIG SIMPLIFIES MAINTAINING ACCURACY"
1420 PRINT " HARD SOLDER OF ANTENNA/LINE ELEMENTS IS SUGGESTED"
1500 PRINT
1510 PRINT " FEED LINE IS RG-8A/U OR RG-213/U, WITH JACKET REMAINING ON"
1520 PRINT " FED THROUGH CENTER FEED TUBE"
1530 PRINT " MATCH TO FEED LINE WITH 1.0 SWR, AS CLOSE AS POSSIBLE."
1540 PRINT " PLACE MATCHING ELEMENTS ON BACK OF GROUMD PLANE"
1550 PRINT " FOR A SELF-CONTAINED ASSEMBLY."
2000 PRINT
2010 INPUT "ENTER P=PRINT DIMENSIONS, R=RERUN, Q=QUIT";T$
2020 IF T$="R" THEN 270
2030 IF T$="Q" THEN STOP
2040 IF T$<>"P" THEN 2000
3000 LPRINT " STANDARD ANTENNA, GAIN= 7.7+/-.25 DB, AT";FO;"MHZ"
3010 LPRINT " WAVELENGTH=";FNP(LAMDA);"METERS"
3020 LPRINT " =";FNP(LAMIN);"INCHES"
3030 LPRINT " THE ANTENNA IS CONSTRUCTED ON A SQUARE REFLECTING SCREEN"
3040 LPRINT " ";FNP(LAMDA);"METERS ON A SIDE"
3050 LPRINT " OR";FNP(LAMIN);"INCHES SQUARE"
3060 LPRINT " AT EXACT CENTER OF SQUARE, INSTALL FEED TUBE,"
3070 LPRINT " OF 7/8 COPPER TUBING, SPLIT INTO TWO HALVES,
3080 LPRINT " LENGTH OF FEED TUBE=";FNP(LAMDA/4);"METERS"
3090 LPRINT " =";FNP(LAMIN/4);"INCHES"
3100 LPRINT " TWO=WIRE TRANSMISSION LINE IS CONSTRUCTED OF 5/16 COPPER TUBING
3110 LPRINT " BOTTOM OF U=";FNP(LAMDA/2);"METERS"
3120 LPRINT " =";FNP(LAMIN/2);"INCHES"
3130 LPRINT " AND SIDES=";FNP(LAMDA/4);"METERS"
3140 LPRINT " =";FNP(LAMIN/4);"INCHES"
3150 LPRINT " DIPOLES ARE 1/2 WAVELENGTH LONG, END-END"
3160 LPRINT " LENGTH OA=";FNP(LAMDA/2);"METERS"
3170 LPRINT " =";FNP(LAMIN)/2;"INCHES"
3180 LPRINT " AND ARE OF 3/8 INCH DIAMETER COPPER TUBING"
3190 LPRINT " CUT TO LENGTH=";FNP(LAMDA/4-.0127);"METERS
3200 LPRINT " =";FNP(LAMIN/4-.5);"INCHES"
3210 LPRINT " BOND TO TRANSMISSION LINE AT BENDS."
3500 GOTO 2000
5000 CLS:PRINT :PRINT
5010 PRINT " GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG"
5020 PRINT " G G"
5030 PRINT " G DDDDDDDDS SDDDDDDDD G"
5040 PRINT " G T T G"
5050 PRINT " G T T G"
5060 PRINT " G T T G"
5070 PRINT " G F F G"
5080 PRINT " G T T G"
5090 PRINT " G T T G"
5100 PRINT " G T T G"
5110 PRINT " G DDDDDDDDS SDDDDDDDD G"
5120 PRINT " G G"
5130 PRINT " GGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGG"
5200 PRINT
5210 PRINT " WHERE- G= GROUND PLANE, 1/4 WAVELENGTH BEHIND ANTENNA ASSEMBLY"
5230 PRINT " D-D= HALF-WAVE DIPOLE"
5240 PRINT " TT= 2-WIRE TRANSMISSION LINE, 1/2 WAVELENGTH LONG"
5250 PRINT " SS= 1/4 WAVE 2-WIRE STUB SUPPORT POINTS"
5260 PRINT " FF= COAX/BALUN FEED POINTS"
5300 PRINT
5310 INPUT "PRESS RETURN TO CONTINUE";T$
5320 RETURN
60000 PRINT "ERROR";ERR;"AT LINE";ERL
60010 STOP