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Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024

Webmaster:

    Kirt Blattenberger,

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

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Technology Theme Crossword Puzzle
April 25, 2021

This Technology Theme Crossword Puzzle for April 25th 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

Technology Theme Crossword Puzzle for April 25th, 2021 - RF Cafe

ACROSS DOWN
2. Threaded fastener (pl.)

5. Temporary high-speed blast of data

8. ______ Marietta, or Lockheed ______

13. Computer communication scheme (abbr.)

15. Unit of apparent power (abbr.)

16. Wired Equivalent Privacy (abbr.)

18. Discipline for aircraft navigation in low visibility environments (abbr.)

21. Chemical symbol for iron

22. Crystal filter type (abbr.)

24. Electrical safety organization (abbr.)

25. Unit of volume (abbr.)

27. Longitudinal shape-forming structural element

29. Type of data conversion device (abbr.)

31. Telecommunications Information Network Architecture (abbr.)

33. 30 kHz to 300 kHz

35. Chemical symbol for helium

36. Type of data storage IC (pl.)

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

39. Strong cable covering

41. Electronics manufacturer with "meatball" logo

42. Used logic gates

44. Digital Signal Processor (abbr.)

45. Unit of admittance

46. Country of RF Cafe's residency

47. Color quality

48. Capacitor manufacturer

49. Graphics file extension

50. Million multiply accumulate operations (abbr.)

53. Chemical symbol for tantalum

55. Current-voltage phase mnemonic

56. Chemical symbol for praseodymium

57. Cellular Telecommunications Industry Association

60. PCB mask exposing ray (abbr.)

61. Movement

62. Web's most popular radio frequency engineering site (2 ltrs. + 1 wd.)

63. Intermodulation (abbr.)

64. Award offered by ARRL for contacting and confirming 100 or more different countries (abbr.)

66. Chemical symbol for neon

67. 3-phase transformer configuration

68. Chemical symbol for lithium

69. Primary U.S. standards organization founded in 1918 (abbr.)

71. Mr. Piper's famous yellow airplane

72. Ticker symbol for Analog Devices

73. Anatech Electronics Inc., (abbr.)

75. Nordic Mobile Telephone

77. Last statement in a BASIC program

78. Logical negation operator

80. Propagation by means of ionospheric reflection

83. "Calling any amateur radio station"

85. PCB interconnect

87. Chemical symbol for thallium

88. Describes when a synchronous motor loses phase lock

91. 1e-6 mA

93. JavaScript (abbr.)

94. Type of spread spectrum that does not use frequency hopping (abbr.)

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

97. ____RF, passive RF component manufacturer in Huntersville, NC

99. Switch position

100. Chemical symbol for nickel

101. RF connector type

103. 1/100 meter (abbr.)

104. Digital pattern coding type (abbr.)

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

107. Weight (abbr.)

109. Sound-pressure level derived using A-weighting

110. Image storage format

111. RF IC manufacturer located in Dübendorf, Switzerland (now owned by ON Semiconductor)

112. The "A" in DARPA

1. Adhered

2. Chemical symbol for tin

3. 1.602E-19 Joules

4. Akin to WAC, only just in America

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

6. Move from cell to cell

7. Semiconductor and calculator company (abbr.)

9. Colorado Springs military school (abbr.)

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

11. Unit of time (abbr.)

12. O-scope time base action

14. Chemical symbol for aluminum

16. Wireless application protocol (abbr.)

17. Chemical symbol for erbium

19. Unit of length (abbr.)

20. Slang for transmitter and/or receiver

23. ampere-hour (abbr.)

25. Chemical symbol for calcium

26. Centimeter (abbr.)

28. Electro-_________, RF components & design services company in Palm City, FL - Also, the science of light

29. Conductor used to bleed charge from a high voltage supply bank (2 wds.)

30. Being in-phase

32. RF region defined at less than wavelength/(2 x pi)

33. Chemical symbol for lawrencium

34. Chemical symbol for iron

36. Angular speed unit

37. Miniature RF connector

39. Chemical symbol for arsenic

40. Chemical symbol for ruthenium

42. Optical cross-connect (abbr.)

43. Sound-pressure level derived using A-weighting

51. Multiplexer (abbr.)

52. A feedback scheme to level out the receiver audio volume (abbr.)

54. Automated Test Equipment (abbr.)

56. Programmable logic device (abbr.)

58. Chemical element abbreviated Sn

59. International Microwave Symposium (abbr.)

64. Logarithmic unit of ratio (abbr., pl.)

65. Common shorthand reference for a capacitor

69. Agilent's EE design software (abbr.)

70. Indium phosphide (abbr.)

71. 10E-2 numerical prefix

74. Radio signals from the cosmos (abbr.)

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

79. Type of shielded RF cable with two inner conductors

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

82. Network department (abbr.)

84. Ham's code for "Are my signals fading?"

86. Volts divided by resistance

87. Service of the ARRL that helps hams solve technical problems (abbr.)

89. Local Oscillator (abbr.)

90. One port of an amplifier

92. Army-Navy specification prefix

94. Direct Memory Access (abbr.)

95. Chemical symbol for scandium

97. Amateur radio operator who is qualified to administer Amateur Radio licensing examinations (abbr.)

98. Conductor size unit (abbr.)

100. Chemical symbol for niobium

102. Unlicensed FCC Part 95 realm for personal and business radio use (abbr.)

103. 1/100 meter (abbr.)

105. 10E1 numerical prefix

106. Unit of length (abbr.)

108. Test equipment (abbr.)

109. Chemical symbol for dysprosium


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

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May 30

May 23

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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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Technology Theme Crossword Solution for April 25th, 2021 - RF Cafe

RIGOL Technologies (test equipment) - RF Cafe

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