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Technology Theme Crossword Puzzle
April 4, 2021

This Technology Theme Crossword Puzzle for April 4th has many words and clues related to RF, microwave, and mm-wave engineering, optics, mathematics, chemistry, physics, and other technical subjects. As always, this crossword contains no names of politicians, mountain ranges, exotic foods or plants, movie stars, or anything of the sort unless it/he/she is related to this puzzle's technology theme (e.g., Reginald Denny or the Tunguska event in Siberia). The technically inclined cruciverbalists amongst us will appreciate the effort. Enjoy!

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

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

Engineering-Theme Crossword Puzzle for April 4th, 2021 - RF Cafe

1. Symbols and lines used to construct a representative drawing of a system at a high level - and what RF Symbols for Visio and Office are perfect for (2 wds., pl.)

10. Constellation : The lion

11. He developed an alphabet composed of dots and dashes

12. Powers pneumatic devices

14. Automatic Calibration System (abbr.)

17. SIP x 2

18. Describes the action of cleaving a crystal plane

20. Summed

21. Vertical cavity-surface emitting laser (pl.)

23. Common average used for sinewaves (abbr.)

24. Type of chart

26. Adjust a pot

28. Opposite of I.D.

29. Chemical symbol for thallium

30. Color quality

31. Chemical symbol for antimony

33. Ham abbreviation for "distant station"

34. Analog-to-Digital (abbr.)

35. Causes a voltage or current waveform to gradually die out

37. Multifunctional silicon devices (abbr.)

39. Chemical symbol for tin

40. Akin to EEs, CEs, AEs, etc. (abbr., pl.)

41. Radio Amateurs of Canada (abbr.)

43. Amateur radio abbreviation for the Oceania region (abbr.)

45. PC follower

46. Voltage-controlled oscillator (abbr.)

47. Exponent that returns the original number

48. Unit of inductance (abbr.)

49. Radio term for indicating the end of a transmission segment

51. Adjusts

53. Describes when a synchronous motor loses phase lock

55. Its chemical symbol is Xe

57. "Texting" (abbr.)

58. Type of antenna constructed from one or more winding(s) of wire or rods (pl.)

59. Apollo 11 astronaut ____ Armstrong

61. Adjust

62. Electronics Industry Association (abbr.)

64. Graphics file extension

67. Chemical symbol for scandium

68. Opposite of a LO

70. Filter type that blocks frequencies below and above a specified band (abbr.)

72. 3 MHz to 30 MHz

73. Reduction of receiver sensitivity due to overload from a nearby transmitter

1. Chemical symbol for beryllium

2. Terminations

3. Unit of length (abbr.)

4. U.S. military organization (abbr.)

5. A famous LEO satellite constellation (originally to be 77 satellites)

6. MS's server-side script engine for dynamically-generated web pages (abbr.)

7. Electronics manufacturer with "meatball" logo

8. Joins a male and a female connector

9. Chemical symbol for silicon

10. Chemical symbol for lanthanum

13. Chemical symbol for rhodium

15. Chemical symbol for cadmium

16. Impenetrable physical barrier

18. Imaging device (abbr., pl.)

19. Unit of time (abbr.)

20. Stock symbol for Advanced Micro Devices

22. Semiconductor lamp

23. Read-only (abbr.)

24. A vector quantity (typically a complex number) representing a sinusoidally varying current or voltage (pl.)

25. Type of reconfigurable memory (abbr., pl.)

27. Mate to an RX

29. Time delay (abbr.)

32. Chemical symbol for bismuth

34. RF radiating structure

35. Digital Enhanced Cordless Telephone

36. Prefix for font without serifs

38. Unit of electrical charge

39. File menu option

40. 1e3 uV

42. European equivalent to the U.L.

44. The shortest-duration modulation state in a spread spectrum system

49. Shorthand for oxygen

50. Term indicating profitability of a company (abbr.)

52. Type of high frequency diode (abbr.)

53. Semiconductor On Insulator (abbr.)

54. Unit of time (abbr.)

56. Chemical symbol for nickel

58. Chemical symbol for lawrencium

60. Front edge of a wing (abbr.)

61. Coefficient of temperature (abbr.)

62. IC killer (abbr.)

63. Current-voltage phase mnemonic

65. Unit of admittance

66. Circuit for firing a radar magnetron (abbr.)

68. Chemical symbol for helium

69. One port of an amplifier

70. Stock symbol for Boeing

71. Chemical symbol for platinum

See solution below


2021 Crosswords 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-Theme Crossword Puzzle Solution for March April 4th, 2021 - 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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