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Science Theme Crossword Puzzle
August 22, 2021

This Science Theme crossword puzzle for August 22nd, 2021, contains only words and clues related to engineering, mathematics, chemistry, physics, and other technical words. 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

Science Theme Crossword Puzzle for August 22nd, 2021 - RF Cafe

1. Diode type whose capacitance is controlled by a reverse bias (pl.)

7. Ham's code for "Take over as net control station."

10. Numerical basis for decibels (abbr.)

13. This crossword puzzle's theme

18. Switch position

19. Data transmission pathway

20. Total radiated power (abbr.)

21. 10E1 numerical prefix

22. Greek letter (micro)

23. Chemical symbol for aluminum

24. Person responsible for program spending (abbr.)

27. Electronics Industry Association (abbr.)

29. International Reply Coupon (abbr.)

31. Precision landing system (abbr.)

34. Unix, Linux or Windows (abbr.)

35. Lowest power level capable of being demodulated (abbr.)

37. Automatic network analyzer (abbr.)

39. Jack ______, "Microwaves & RF" magazine editor (c2014)

41. SIP x 2

43. Chemical symbol for europium

44. The "F" in EMF

46. Amateur Radio Association (abbr.)

48. Network department (abbr.)

49. Electronics manufacturer with "meatball" logo

50. 1/000 of an amp (abbr.)

52. The "S" in SOIC

53. Finite Element Analysis (abbr.)

55. Aerodynamic opposition to thrust

58. 30 kHz to 300 kHz

59. Last stage in a transmitter (abbr.)

61. National Television System Committee (abbr.)

64. Stock symbol for Lockheed Martin

66. Type of secondary radar system (abbr.)

67. Part of CAD

69. An ellipse has two of them

70. Akin to an EE, CE, AE, etc.

71. ampere-hour (abbr.)

73. NIST radio station (broadcasts time signals)

74. Maximum voltages in a waveform

76. FCC Part 15 rules apply in this band (abbr.)

78. Ham abbreviation indicating contacts with all major land masses

80. Current summing point

81. JavaScript (abbr.)

82. Unit of time (abbr.)

83. Move in a raster pattern

85. Add two or more inputs

87. Sharp bends in I-V curves

88. Decimeter (abbr.)

90. A common battery cell size

91. Chemical symbol for iron

93. Government program to bring electricity to farms (abbr.)

95. The Brits call them valves

97. PC follower

99. Compressed image file format

101. Frequency band at high end of audio spectrum

103. Multiplexer (abbr.)

104. ___-back transformer

105. 1e3 μV

106. Nordic Mobile Telephone

108. Circuit element connecting PCB layers

109. User Datagram Protocol

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

113. Filter type that blocks lower frequencies (abbr.)

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

116. Greek letter (micro)

118. Heatsink feature

120. Mate to a bolt

122. A BPF specification (abbr.)

123. Small motored tool for model drilling, grinding, shaping, etc. (pl.)

124. Governmental agency that monitors pollution (abbr.)

125. Type of logic gate

126. Mr. Marconi's first name

1. Volt-ohmmeter (abbr.)

2. Army-Navy specification prefix

3. Positive electrode

4. Chemical symbol for terbium

5. One port of an amplifier

6. Type of flip-flop

7. Unit of liquid measure (abbr.)

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

9. Started as HPIB

11. Opposite of I.D.

12. Ratio of output to input power, voltage, current, light, etc. (pl.)

13. Miniature RF connector

14. Chemical symbol for copper

15. European Telecommunications Standards Institute (abbr.)

16. Chemical symbol for calcium

17. Voltage-current phase mnemonic

24. Alloy of copper and nickel used in some thermocouples

25. Chemical symbol for arsenic

26. Plug-in for computer bus

28. Flash caused by an electric current ionizing a gas or vapor

30. One component of a complex number (abbr.)

32. Front edge of a wing (abbr.)

33. __________ approximation DAC

35. 1/000 of an inch

36. Below ELF

38. 1e-6 mA

40. Refers to the IEEE802.11 networks (abbr.)

41. Morse Code for "from"

42. Related to FM by a differential

44. Contains imperfections in a crystal lattice

45. Keyboard key

47. Amateur Radio on the International Space Station (acr.)

49. Chemical symbol for gallium

51. Negatively charged ions

54. Volts divided by resistance

56. Sound frequency in the human hearing range (abbr.)

57. Ground fault interrupter (abbr., pl.)

58. Hedy _____, Hollywood actress with first patent for spread spectrum communications

59. BlackBerry or Jordana for example (abbr., pl.)

60. Electrical overstress (abbr.)

62. Type of component package (abbr.)

63. Common plastic insulation type (abbr.)

65. Test equipment (abbr.)

68. Modern battlefield technique (abbr.)

72. Chemical symbol for holmium

75. Sharp bend in I-V curve

77. Chemical symbol for scandium

79. Describes the action of cleaving a crystal plane

81. Intel x86 command for " jump if above"

84. Electric enclosure standard organization (abbr.)

86. Maximum Usable Frequency

87. Send Morse Code

89. Unit for 1,000,000 watt-seconds (abbr.)

90. Chemical symbol for silver

91. A complete set of data bits in a stream

92. Arithmetic Logic Unit (abbr.)

94. Chemical symbol for gold

96. One of many similar appendages of a fan

98. Chemical symbol for thulium

100. Type of data storage IC (abbr.)

101. Semiconductor and calculator company (abbr.)

102. Erbium Doped Fiber Amplifier (abbr.)

105. Unit of length (abbr.)

107. Amplifier linearity specification (abbr.)

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

110. Part of a male connector

111. A semi-automatic mechanical code key

112. Engineering Change Order (abbr.)

114. Chemical symbol for praseodymium

115. Electrical safety organization (abbr.)

117. One type of electron spin

119. Chemical symbol for neodymium

120. Greek letter used for frequency

121. Chemical symbol for thallium

122. Type of modulation (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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A cruciverbalist is a person who is skilled at creating or solving crossword puzzles. The term is a combination of "cruci-" from "crucifix," meaning cross, and "verbalist" from "verbal," indicating a person who deals with words. cruciverbalists are often responsible for designing crossword puzzles, and they possess a deep knowledge of wordplay, vocabulary, and the techniques used in constructing and solving crosswords. They aim to make puzzles that are both challenging and enjoyable for crossword enthusiasts.

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

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May 2

April 25

April 18

April 11

April 4

March 28

March 21

March 14

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February 28

February 21

February 14

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