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RF Cafe Engineering & Science Crossword Puzzle
September 29, 2019

For two decades, I have been creating custom engineering- and science-themed crossword puzzles for the brain-exercising benefit and pleasure of RF Cafe visitors who are fellow cruciverbalists. The jury is out on whether or not this type of mental challenge helps keep your gray matter from atrophying in old age, but it certainly helps maintain your vocabulary and cognitive skills at all ages. This September 29, 2019, puzzle uses a database of thousands of words which I have built up over the years and contains only clues and terms associated with engineering, science, physical, astronomy, mathematics, chemistry, etc. You will never find a word taxing your knowledge of a numbnut soap opera star or the name of some obscure village in the Andes mountains. You might, however, encounter the name of a movie star like Hedy Lamarr or a geographical location like Tunguska, Russia, for reasons which, if you don't already know, might surprise you.

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

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

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

Engineering & Science Crossword Puzzle September 29, 2019 - RF Cafe

<click for full size to print>

1. Megavolt / 1000

6. Facility where semiconductors are manufactured

9. RF ________ for Visio, RF Cafe's amazing block diagram and schematic shapes

15. Engineering Change Order (abbr.)

16. Greek letter, used to indicate summation

18. European Telecommunications Standards Institute (abbr.)

20. One component of a complex number (abbr.)

21. Indium phosphide (abbr.)

23. Automated Test Equipment (abbr.)

24. Programmable Logic Device (abbr.)

25. Prefix for 10E-18

26. Chemical symbol for radium

28. Telex-Over-Radio (abbr.)

30. Below ELF

32. Cellphone band directly above DCS

33. Frequency band at low end of audio spectrum

34. Antenna radiated power measurement (abbr.)

37. Bands between RF and baseband

39. Impurity in a semiconductor (pl.)

43. 1e-6 mA

44. Edge of an airplane wing where ailerons and flaps are attached (abbr.)

45. Benjamin Franklin's kite was struck by it

48. Radio Amateur Satellite Corporation (abbr.)

50. Chemical symbol for rubidium

52. Chemical symbol for polonium

53. System for guiding aircraft (abbr.)

54. Army-Navy specification prefix

56. __ + , 42 Down, the world's best engineering website

57. 3 GHz to 30 GHz

59. Opposite of I.D.

62. Chemical symbol for neodymium

64. Hydrogen, argon, neon, xenon, etc.

67. X-ray film image (pl.)

71. A common battery cell size

73. Band between RF and BB

74. Its chemical symbol is Bi

76. Resistive component of a capacitor's lumped element model (abbr.)

77. Electrical unit of potential difference

78. Target indication on a radar display

79. Filter type (abbr.)

80. System On Chip

82. Logic family (abbr.)

84. Chemical symbol for lutetium

85. Mr. Dirac's first name

87. The cell band above DCN

90. Internet address (abbr.)

91. Half of a DIP

92. PC follower

93. Positive emitter-coupled logic (abbr.)

95. _____ factor, the peak-to-average waveform value

98. Permeability-tuned oscillator (abbr.)

99. RF Cascade ________, the world's best Excel-based spreadsheet of its kind

100. Using the moon as a passive reflector to establish a signal path; moonbounce (abbr.)

101. Type of power supply

1. It connects the software to the hardware

2. Current-voltage phase mnemonic

3. Local Oscillator (abbr.)

4. Opening for airflow

5. Local Oscillator (abbr.)

6. The "F" in EMF

7. Chemical symbol for silver

8. Graphics file extension

10. Test equipment (abbr.)

11. On-the-air meeting of hams at a set time, day and radio frequency (pl.)

12. Logic gate output configuration (abbr.)

13. A line on a map which joins points of equal pressure

14. Chemical symbol for lithium

16. Official Space Shuttle designation (abbr.)

17. Chemical symbol for aluminum

19. Similar to a laser, but at lower frequencies

22. The tip of a PCB probe (pl.)

25. Automatic Calibration System (abbr.)

26. Readability, Signal, and Tone (QoS report type)

27. Its chemical symbol is Ar

29. RF integrated circuit (abbr.)

31. Finite Element Analysis (abbr.)

32. Push to Talk (abbr.)

35. Input intercept point (abbr.)

36. Unit of inductance (abbr.)

38. Chemical symbol for tin

40. Type of modulation (abbr.)

41. Resistive component of a capacitor's lumped element model (abbr.)

42. 56 Across + ____, the world's best engineering website

46. Chemical symbol for tantalum

47. High frequency semiconductor (abbr.)

49. Causes circuit path with very low or 0 ohms of impedance

51. Its chemical symbol is B

55. Stock symbol for National Semiconductor

57. Switch configuration (abbr.)

58. Start frequency (abbr.)

60. Keyboard key

61. Wire

63. Slang for Ursa Major

64. Image file format name extension

65. Chemical symbol for europium

66. Official Space Shuttle designation (abbr.)

68. Chemical symbol for xenon

69. PCB mask exposing ray (abbr.)

70. The stationary part of a motor

72. Arithmetic Logic Unit (abbr.)

74. Method of sending high-speed digital signals on electric distribution wires, a Ham's nemesis (abbr.)

75. Artech _____, technical book publisher

79. Illumination device

81. Type of computer display (abbr.)

83. Upward force generated by an airfoil

86. Abbreviation for acknowledge (also a common word used by Bill the Cat)

88. Unit of volume (abbr.)

89. The design component of total product cost (abbr.)

92. Automated Test Equipment (abbr.)

93. Chemical symbol for polonium

94. Galilean moon

96. Electromagnetic (abbr.)

97. Bandwidth (abbr.)

98. Unit of inductance (abbr.)

See solution below


2019 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.

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Espresso Engineering Workbook - RF Cafe

About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

1996 - 2024


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...

Copyright  1996 - 2026

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

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