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!
everythingRF RF & Microwave Parts Database - RF Cafe
Windfreak Technologies Frequency Synthesizers - 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:


Anatech Electronics - RF Cafe

Science Theme Crossword Puzzle
June 20, 2021

This Science Theme Crossword Puzzle for June 20th has many words and clues related to RF, microwave, and mm-wave engineering, optics, mathematics, chemistry, physics, and other technical subjects. Also, it contains a message for this special day (celebrated in the USA and other countries). 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

Science Theme Crossword Puzzle for June 20, 2021 - RF Cafe

1. Antenna driven element (pl.)
9. Type of logic gate
11. _____ delay, which describes the time taken for information to pass through a circuit element
17. _____ + 62 Across + 86 Across, a special message for the day
18. Electrical overstress (abbr.)
20. Course heading
22. BS__ - the degree held by many RF Cafe visitors
23. Range of frequencies (pl.)
25. Ham's code for "Station is leaving the net."
26. Last stage in a transmitter (abbr.)
28. Type of chart
29. Pick-and-_____ automated PCB component insertion tool
30. Error checking scheme (abbr.)
32. Mr. Blattenberger of RF Cafe
34. BER, 8 bits at a time
37. Query an input for changes
39. Adjust a pot
41. Audible frequency
42. One of many similar appendages of a fan
45. Computer monitor resolution measure (abbr.)
46. Unix, Linux or Windows (abbr.)
47. Unit of length equal to 5.5 yards
50. Type of data conversion device (abbr.)
51. Service of the ARRL that helps hams solve technical problems (abbr.)
53. Upper frequency (abbr.)
54. Synthetic
55. A property of memristors
56. Ability to store a charge
62. 17 Across + ______'_ + 86 Across, a special message for the day
66. Chemical symbol for molybdenum
68. Gallium nitride chemical symbol
69. Push to Talk (abbr.)
71. Akin to EEs, CEs, AEs, etc. (abbr., pl.)
72. Chemical symbol for arsenic
73. Electronics Industry Association (abbr.)
75. Electrical unit of potential difference (pl.)
76. Regarding light
78. 2 x SSB
80. Attenuator topology (hyph.)
83. System On Chip
85. Small representative graphic
86. 17 Across + 62 Across + ___, a special message for the day
88. Vertical cavity-surface emitting laser (pl.)
91. Type of e-mail address system (abbr.)
92. Mate to a TX
95. Lowest power level capable of being demodulated (abbr.)
96. Units of 1000 CPS
98. Chemical symbol for mendelevium
99. Overall functional units
103. Last stage in transmitter (abbr., pl.)
104. Crystal face
107. Constellation : The scales
108. Stock symbol for Harris Communications
109. Chunks of space rocks
2. ampere-hour (abbr.)
3. Type of data conversion device (abbr.)
4. Internet protocol (abbr.)
5. Nearest and furthest points to the center of gravitational attraction for a body in orbit (pl.)
6. Enter data using the keyboard
7. Sounding device vehicle
8. Unit of energy
10. A measure of receiver quality (abbr.)
11. Mr. Ohm's first name
12. Chemical symbol for radium
13. Type of logic gate (pl.)
14. Schema for computer or device presentation to the operator (abbr.)
15. Silicon transistor type
16. Instrument used to measure the maximum attained transmitter waveform output level (3 wds., pl.)
18. Effective Radiated Power (abbr.)
19. Miniature threaded RF connector
20. Low- to mid- frequency RF connector
21. GaAs (2 wds.)
24. Mathematical quantity having magnitude, but no direction
27. Ham's code for "Shall I send more slowly?"
31. Uppermost surface
33. Prefix meaning ground or earth
34. Moving air
35. Effective frontal area presented to a microwave interrogation system (abbr.)
36. Type of data conversion device (abbr., pl.)
38. Filter type that blocks upper frequencies (abbr.)
40. An array of 12 or 16 numbered keys that generate the standard telephone dual tone multiple frequency (DTMF) dialing signals (2 wds.)
43. Ticker symbol for Analog Devices
44. Early printer type (2 wds.)
48. Decimeter (abbr.)
49. CBer exclamation of emphasis
51. Chemical symbol for tantalum
52. Chemical symbol for scandium
57. Chemical symbol for silver
58. Army-Navy specification prefix
59. Apple's popular media playing device
60. Logic family (abbr.)
61. Capture leading edge of a signal
63. Application Specific Integrated Circuit (abbr.)
64. 1/100 meter (abbr.)
65. Receiver power level circuitry (abbr.)
67. Output intercept point (abbr.)
70. Bits per second (abbr.)
74. A common battery cell size
77. Tall structures for antennas
79. Digital pattern coding type (abbr.)
81. Greek letter used for coefficient of reflection
82. Electro-mechanical switching device
84. David ____ - popular author on microwave engineering
87. 36 in. (abbr., pl.)
89. Half of a DIP
90. Line of Sight (abbr.)
91. Teflon (abbr.)
93. Amateurese for "wife"
94. Mathematical basis for calculating noise power for a given bandwidth and temperature (abbr.)
97. Anatech Electronics Inc., (abbr.)
100. Chemical symbol for silicon
101. Chemical symbol for erbium
102. Infrared (abbr.)
105. Chemical symbol for cobalt
106. Time delay (abbr.)

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
















Science Theme Crossword Solution for June 20, 2021 - RF Cafe

Axiom Test Equipment - RF Cafe
Copper Mountain Technologies (VNA) - RF Cafe

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

These Are Available for Free