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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

ACROSS DOWN
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.

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

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    BSEE - KB3UON

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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