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RF Cafe Science & Engineering Crossword Puzzle
March 29, 2020

This March 29, 2020, tech-themed crossword puzzle contains only clues and terms associated with engineering, science, physical, astronomy, mathematics, chemistry, etc., which I have personally built over nearly two decades. Many new words and company names have been added that had not even been created when I started in the year 2002. 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 March 29, 2020 - RF Cafe 

<click for full size to print>

1. Greek letter often used to represent an angle

4. Ratio of a mechanical drawing

8. Opposite of output

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

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

17. Automated Test Equipment (abbr.)

18. Ticker symbol for Analog Devices

19. Electromotive force (abbr.)

21. Chemical symbol for europium

23. Direct Memory Access (abbr.)

25. Volt-ohmmeter (abbr.)

27. Low Noise Amplifier (abbr.)

28. Stock symbol for Lockheed Martin

29. Chemical symbol for gallium

30. Family of ICs with a certain component density level (abbr.)

32. Logic gate output configuration (abbr.)

34. Type of component package (abbr.)

35. Opposite of I.D.

36. Degree of IC sophistication (abbr.)

37. Peak Inverse Voltage

38. CB slang for CB radio or antenna

39. Software drafting tool (abbr.)

41. Digital storage oscilloscope (abbr.)

42. 2 x SSB

43. RF ____, the world's best engineering website

45. Bands between RF and baseband

46. Peripheral Component Interface (abbr.)

48. Electrical component the stores energy in a magnetic field

49. Branch of the military with airborne laser weapon (2 wds.)

50. Online service

52. Method of self-detection and self-fixing transmission of digital data (abbr.)

53. Greek letter

56. Circuit for maintaining constant voltage (abbr.)

58. Internet address (abbr.)

59. "Texting" (abbr.)

62. Aerodynamic opposition to thrust

65. The unit of electrical resistance

66. Variable Frequency Oscillator

67. Chemical symbol for mercury

68. Chemical symbol for silver

70. High Data Rate

72. Transmit Incremental Tuning (abbr.)

73. Home state of Los Alamos lab (abbr.)

74. System On Chip

75. Amateur radio operator who is qualified to administer Amateur Radio licensing examinations (abbr., pl.)

76. Uppermost surface

78. High Data Rate

80. Chemical symbol for rhodium

81. Specialized mobile radio (abbr.)

82. Circuit element connecting PCB layers

83. Be behind in phase

85. Facility where semiconductors are manufactured

87. Substrate for mounting components (abbr.)

88. Determines proper functionality

89. Summed

90. Printer output resolution unit (abbr.)

2. Chemical symbol for helium

3. Intermodulation distortion (abbr.)

5. Chemical symbol for calcium

6. Amateur radio operating mode for sharing realtime video (abbr.)

7. Low altitude earth orbit

9. Logic gate

10. BlackBerry or Palm for example (abbr.)

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

12. Nordic Mobile Telephone

13. Part of this website's title

14. Audiovisual devices often the topic of Mac's Service Shop stories

16. Science of assuring operation amid dense EM background noise (abbr.)

19. Electromagnetic interference (abbr.)

20. Measured distance of a cycle from beginning to end (pl.)

22. Country of RF Cafe's residency

24. System for guiding aircraft (abbr.)

26. Multichannel multipoint distribution service

27. Open-______ or closed-______ system

28. Opposite of USB

29. Image file format name extension

31. Infrared (abbr.)

33. Chemical symbol for tantalum

36. 1E6 nanoseconds

37. Last stage in a transmitter (abbr.)

40. English theoretical physicist who created the delta function now named after him

42. Trigger diode that conducts current only after its breakdown voltage has been exceeded momentarily (pl.)

44. Effective frontal area presented to a microwave interrogation system (abbr.)

47. Trade magazine covering RF & microwaves topics (abbr.)

51. Cable termination type (pl.)

52. Area on a shaft for accommodating a setscrew

54. Unit of resistance

55. Chemical symbol for thulium

56. Scheme to maintain proper frequency (abbr.)

57. Local Oscillator (abbr.)

60. Unit of inductance (abbr.)

61. Synchronous Digital Hierarchy

63. Mate to a TX

64. Powers pneumatic devices

66. Aircraft navigation system (abbr.)

67. Form of energy arising from the kinetic energy of atoms and molecules

69. A common IC bond wire metal

71. Radio Direction Finding (abbr.)

74. Miniature RF connector

75. Digital encoding of the transmission mode in the vertical sync portion of an SSTV image (abbr.)

77. Attenuator

79. Radio Amateurs of Canada (abbr.)

81. Chemical symbol for scandium

82. Amateur radio operator who is qualified to administer Amateur Radio licensing examinations (abbr.)

84. Electronics manufacturer with "meatball" logo

86. Filter type that blocks frequencies below and above a specified band (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.

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Engineering & Science Crossword Solution March 29 - RF Cafe

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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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