Electronics World articles Popular Electronics articles QST articles Radio & TV News articles Radio-Craft articles Radio-Electronics articles Short Wave Craft articles Wireless World articles Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs LinkedIn Crosswords Engineering Humor Kirt's Cogitations RF Engineering Quizzes Notable Quotes App Notes Calculators Education Engineering magazine articles Engineering software Engineering smorgasbord RF Cafe Archives RF Cascade Workbook 2018 RF Symbols for Visio - Word Advertising RF Cafe Forums Magazine USAF Radr Shop Sponsor RF Cafe RF Electronics Symbols for Visio RF Electronics Symbols for Office Word RF Electronics Stencils for Visio Thank you for visiting RF Cafe!
RIGOL Technologies (test equipment) - RF Cafe
Innovative Power Products Passive RF Products - RF Cafe

About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 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 typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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

My Hobby Website:


Exodus Advanced Communications Best in Class RF Amplifier SSPAs

Engineering-Theme Crossword Puzzle
March 21, 2021

This Engineering-Theme Crossword Puzzle for March 21st has many words and clues related to... you guessed it... engineering - including RF, microwave, 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., Hedy Lamarr or the Bikini Atoll). 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 March 21st, 2021 - RF Cafe

1. French scientist after whom the unit of current is named (3 wds.)
11. Chemical symbol for polonium
12. Person responsible for program spending (abbr.)
13. Stock symbol for Harris Communications
15. Sound frequency in the human hearing range (abbr.)
17. Airflow rate (abbr.)
19. Stock symbol for Google
21. Part of a FOR loop
22. Sudden, brief increase in wind speed
24. Greek letter (micro)
26. Tie a bundle of wires together
27. Circuit that reduces interference (abbr.)
28. Charged particle
30. Current-voltage phase mnemonic
32. Min-to-max voltage of a waveform (abbr.)
33. Filter type that blocks frequencies below and above a specified band (abbr.)
35. Chemical symbol for cadmium
36. Equalizer (abbr.)
38. Government program to bring electricity to farms (abbr.)
40. Amateur Radio Direction Finding (abbr.)
42. A type of average
44. RF connector type
45. Total radiated power (abbr.)
47. Chemical symbol for antimony
48. Unit of inductance (abbr.)
49. Chemical symbol for lead
50. S12 or S21 (abbr.)
51. Unit of time (abbr.)
52. Opposite of I.D.
53. Unit of inductance (abbr.)
54. Chemical symbol for tantalum
55. Opposite of a LO
56. Unit of frequency (archaic, abbr.)
57. Internet protocol (abbr.)
58. Analog-to-Digital (abbr.)
60. Facsimile
62. Gallium nitride chemical symbol
63. 1E6 bits per second
65. Moon of Saturn discovered in 1672
67. ___/IP scheme for networked connectivity
69. Chemical symbol for magnesium
70. Infrared (abbr.)
72. Type of component package (abbr.)
73. One component of a complex number (abbr.)
74. Schematic label for voltage supply node
76. Unit of resistance
78. 30 GHz to 300 GHz
79. Another name for a test lead
81. Radio signals from the cosmos (abbr.)
83. Radio term for indicating the end of a transmission segment
85. Local Oscillator (abbr.)
86. 80 Down + ____ is this websites title
87. Engineering Change Notice (abbr.)
88. Write-Once (abbr.)
89. Fast Fourier transform (abbr.)
90. Communication between stations by reflecting the radio waves off of the ionosphere
92. Unix, Linux or Windows (abbr.)
94. A variation of the cubical quad with triangular elements (3 wds.)
2. Chemical symbol for neptunium
3. Ph.D.
4. Type of current flow (abbr.)
5. CRT electron beam scan type (pl.)
6. Intermodulation (abbr.)
7. Moon of Saturn with retrograde orbit
8. Unit of energy
9. Type of flip-flop
10. Entity created by virtue of a changing electric current (2 wds.)
14. Tool used to attach electronic components to a PCB (2 wds.)
16. Upper frequency (abbr.)
18. Unit of length (abbr.)
19. Key feature in a high level overvoltage protection device
20. Amateur radio abbreviation for the Oceania region (abbr.)
21. RF connector type
23. Chemical symbol for silicon
25. Schema for computer or device presentation to the operator (abbr.)
26. Filter type that blocks upper frequencies (abbr.)
29. On-the-air meeting of hams at a set time, day and radio frequency (pl.)
31. Chemical symbol for calcium
34. International phonetic alphabet letter "P"
37. Ham's code for "Your net frequency is Low."
39. Chemical symbol for argon
41. Logarithmic ratio (abbr.)
42. Unit of inductance (abbr.)
43. Chemical symbol for niobium
46. Type of e-mail address system (abbr.)
48. 300 MHz to 3 GHz
51. Substrate for mounting component (abbr., pl.)
54. Temperature-compensated crystal oscillator
55. Amateur radio enthusiast
56. Unit of length (abbr.)
57. Network department (abbr.)
58. ampere-hour (abbr.)
59. Go through the process of planned creation
61. PC follower
64. Type of high frequency diode (abbr.)
65. Positive voltage lead color
66. Type of current flow (abbr.)
68. Quantum of energy or a quasiparticle associated with a compressional wave
71. Greek letter
73. Term indicating profitability of a company (abbr.)
75. European equivalent to the U.L.
77. 1e3 μV
80. __ + 86 Across is this website's title
82. Test equipment (abbr.)
84. Modern battlefield technique (abbr.)
86. Curly-Q type light bulb (abbr.)
89. Chemical symbol for iron
90. Chemical symbol for holmium
91. Last stage in a transmitter (abbr.)
93. Chemical symbol for tin

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.

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

December 26

December 19

December 12

December 5

November 28

November 21

November 14

November 7

October 31

October 24

October 17

October 10

October 3

September 26

September 19

September 12

September 5

August 29

August 22

August 15

August 8

August 1

July 25

July 18

July 11

July 4

June 27

June 20

June 13

June 6

May 30

May 23

May 16

May 9

May 2

April 25

April 18

April 11

April 4

March 28

March 21

March 14

March 7

February 28

February 21

February 14

February 7

January 31

January 24

January 17

January 10

January 3
















Engineering-Theme Crossword Puzzle Solution for March 21st, 2021 - RF Cafe

Triad RF Systems Amplifiers - RF Cafe
everythingRF RF & Microwave Parts Database - RF Cafe
Windfreak Technologies Frequency Synthesizers - RF Cafe

Please Support RF Cafe by purchasing my  ridiculously low−priced products, all of which I created.

These Are Available for Free