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Science & Engineering Crossword Puzzle
August 23rd, 2020

August 23rd's custom Science & Engineering themed crossword puzzle contains only only words (1,000s of them) from my custom-created lexicon related to engineering, science, mathematics, chemistry, physics, astronomy, etc. You will never find among the words names of politicians, mountain ranges, exotic foods or plants, movie stars, or anything of the sort. You might, however, find someone or something in the otherwise excluded list directly related to this puzzle's technology theme, such as Hedy Lamarr or the Bikini Atoll, respectively. The technically inclined cruciverbalists amongst us will appreciate the effort.

cruciverbalist: [noun]  cruci- ("cross") +‎ verbal ("words") +‎ -ist ("agent, person") -- A person who constructs crosswords.

Reproduction of this puzzle without the express permission of RF Cafe is prohibited.

acr. = acronym, abbr. = abbreviation, pl. = plural, wds. = words

Science & Engineering Crossword Puzzle for August 23, 2020 - RF Cafe


1. Opposite of set

5. La Place, Z-, and Fourier for example

11. Cambridge University _____, technical book publisher

15. A common battery cell size

16. Tie a bundle of wires together

17. Chemical symbol for silicon

18. Start frequency (abbr.)

19. Workplace safety group (abbr.)

20. Chemical symbol for europium

21. Electrical safety organization (abbr.)

22. Chemical symbol for antimony

24. Complex Instruction Set Computer

25. Chemical symbol for thallium

26. Logarithmic ratio (abbr.)

28. Communication between stations by reflecting the radio waves off of the ionosphere

30. Mate to an RX

31. Opposite of O.D.

32. Type of chart

33. Sound frequency in the human hearing range (abbr.)

35. Yard (abbr.)

36. Optical storage media

37. Opposite of a LO

38. Chemical symbol for praseodymium

39. Keyboard key

41. Boolean expression (pl.)

44. Used logic gates

46. Ham's code for "Does my frequency vary?"

47. CB slang for CB radio or antenna

49. Having a single polarity

52. Teflon (abbr.)

53. The highest numerical exponent describes this property of a polynomial

54. Chemical symbol for argon

55. Microprocessor vendor

56. Stock symbol for National Instruments

59. Filter type with maximally flat group delay

60. Weatherproof cover for a radar antenna

63. System for guiding aircraft (abbr.)

64. Mechanical engineering organization (abbr.)

66. Equipment

69. Special diode type that can be switched (abbr.)

70. Front edge of a wing (abbr.)

71. Chemical symbol for scandium

72. Web's most popular radio frequency engineering site (2 ltrs. + 1 wd.)

75. Unit of inductance (abbr.)

77. Chemical symbol for molybdenum

78. "Texting" (abbr.)

79. Chemical symbol for niobium

81. Unit of length (abbr.)

82. FCC Part 15 rules apply in this band (abbr.)

84. 1/000 of an amp (abbr.)

85. Schema for computer or device presentation to the operator (abbr.)

86. Move from cell to cell

87. European equivalent to the U.L.

88. Centimeter (abbr.)

89. Band between RF and BB

91. Upward force generated by an airfoil

93. Modulation type (abbr.)

94. Chemical symbol for terbium

96. Unit of length equal to 5.5 yards (pl.)

98. Cyanide (abbr.)

99. Creates an impenetrable physical barrier

100. 3-D geometrical figure that is symmetrical about each of three perpendicular axes, and has circular sections along one axis and elliptical sections along the others (pl.)

101. Graphics workshop software

1. Mathematical calculation of RF component string (2 wds.)

2. Chemical symbol for lanthanum

3. Metal mixture

4. Chemical symbol for radium

5. Verified proper functionality of a product

6. Chemical symbol for arsenic

7. Rechargeable battery type (abbr.)

8. The UK's equivalent of the FCC

9. Type of flip-flop

10. 60/40, PbSn, for example

11. Unit of inductance (abbr.)

12. Half of the diameter (pl.)

13. Chemical symbol for selenium

14. Radio receiver scheme which mixes a second frequency (LO) with the incoming radio signals

21. Unit of inductance (abbr.)

23. Armored cable type

25. Semiconductor and calculator company (abbr.)

27. Chemical symbol for beryllium

29. BlackBerry or Palm for example (abbr.)

32. It can follow an MS

34. Finite Element Analysis (abbr.)

38. Rate of a radar transmitter's output waveform (abbr.)

40. Chemical symbol for lawrencium

42. Current summing point (pl.)

43. Sudden, short-lived increase in voltage or current

44. Using a logical connection scheme for redundant power supplies

45. The highest level Amateur Radio license rating

46. Unit of liquid measure (abbr.)

48. Semiconductor On Insulator (abbr.)

50. Last stage in transmitter (abbr., pl.)

51. Type of logic gate (pl.)

52. Programmable Logic Device (abbr.)

57. Automated Test Equipment (abbr.)

58. Coefficient of temperature (abbr.)

61. Unix, Linux or Windows (abbr.)

62. Wire diameter unit (abbr.)

64. Automatic Calibration System (abbr.)

65. 60 seconds

67. Traditional term for a person who enjoys helping newcomers get started in ham radio - a mentor (pl.)

68. Radio frequency interference (abbr.)

71. The "S" in SOIC

73. Enrico _____, nuclear physicist

74. 10E-15 numerical prefix

76. High-speed circuit-switched data (abbr.)

78. Type of component package (abbr.)

80. Chemical symbol for bismuth

81. Unit of frequency (archaic, abbr.)

83. Unit of length (abbr.)

90. Chemical symbol for iron

92. Network department (abbr.)

93. Chemical symbol for aluminum

95. Chemical symbol for bismuth

97. 10E1 numerical prefix

98. Unlicensed FCC Part 95 realm for personal and business radio use (abbr.)

See solution below

2020 Crossword Puzzle Archive

Visit the Crossword Express website - RF CafeTake a well-deserved break and try your hand at some of these goodies. Every word in the RF Cafe crossword puzzles is specifically related to engineering, mathematics, and science. There are no generic backfill words like many other puzzles give you, so you'll never see a clue asking for the name of a movie star or a mountain on the Russia-China border.

All of these crossword puzzles were created using the fabulous Crossword Express (now called "Magnum Opus") software.

2024 | 2023 |2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 | Sudoku


A cruciverbalist is a person who is skilled at creating or solving crossword puzzles. The term is a combination of "cruci-" from "crucifix," meaning cross, and "verbalist" from "verbal," indicating a person who deals with words. cruciverbalists are often responsible for designing crossword puzzles, and they possess a deep knowledge of wordplay, vocabulary, and the techniques used in constructing and solving crosswords. They aim to make puzzles that are both challenging and enjoyable for crossword enthusiasts.

December 27

December 20

December 13

December 7

November 29

Thanksgiving Day

November 22

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April 5

March 29

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March 15

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Science & Engineering Crossword Puzzle Solution for August 23, 2020 - RF Cafe

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Kirt Blattenberger - RF Cafe Webmaster

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    Kirt Blattenberger,


RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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