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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 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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RF Cafe Science & Engineering Crossword Puzzle
February 16, 2020

Here is a science and engineering-themed crossword puzzle for your next long flight or boring meeting. This one for February 16, 2020, contains only clues and terms associated with engineering, science, physical, astronomy, mathematics, chemistry, etc., which I have built up over nearly two decades. Many new words and company names have been added that had not even been created when I started in the year 2002. You will never find a word taxing your knowledge of a numbnut soap opera star or the name of some obscure village in the Andes mountains. You might, however, encounter the name of a movie star like Hedy Lamarr or a geographical location like Tunguska, Russia, for reasons which, if you don't already know, might surprise you.

cruciverbalist: [noun]  cruci- ("cross") +‎ verbal ("words") +‎ -ist ("agent, person") -- A person who constructs or works crosswords.

Reproduction of this puzzle without the express permission of RF Cafe is prohibited.
acr. = acronym, abbr. = abbreviation, pl. = plural, wds. = words

Engineering & Science Crossword Puzzle February 16, 2020 - RF Cafe 

<click for full size to print>

1. Length times width
4. An induction electromechanical device whose speed is not synchronous with the frequency of the supply line (2 wds.)
15. Complex Instruction Set Computer
18. Ham's code for "What is your location?"
20. Chemical symbol for calcium
21. One component of a complex number (abbr.)
22. Filter type that blocks frequencies in a specified band (abbr.)
23. Type of current
24. Amateur radio enthusiast
25. Chemical symbol for silicon
26. Programmable logic device (abbr.)
28. Term used in soldering to achieve the condition that occurs when the metals being soldered are hot enough to melt the solder so it flows over the surface
30. Decimeter (abbr.)
31. Unit of time (abbr.)
33. FCC Part 15 rules apply in this band (abbr.)
35. 3-phase transformer configuration
36. Chemical symbol for nobelium
38. Semiconductor lamp
39. Logarithmic ratio (abbr.)
41. Akin to an EE, CE, AE, etc.
42. One system's phonetic letter "z"
44. Web's most popular radio frequency engineering site (2 ltrs. + 1 wd.)
46. Finite Element Analysis (abbr.)
48. Opposite of a source (pl.)
51. Radio Amateurs of Canada (abbr.)
53. Securing devices
55. Type of high speed Internet service (abbr.)
56. Numerical prefix for 10E2
58. Semiconductor device type (abbr.)
59. Fuses metals together using heat
61. Exponent that returns the original number
62. Chemical symbol for erbium
64. Innovative Power Products, Holbrook, NY (abbr.)
66. Temperature-compensated crystal oscillator (abbr., pl.)
68. One of many similar appendages of a fan
70. Unit of energy
72. Intel x86 command for " jump if above"
73. Type of flip-flop
74. Switch position
75. Chemical symbol for strontium
76. Unit of volume (abbr.)
78. Type of current flow (abbr.)
79. Unit of inductance (abbr.)
81. Finite-Element Model
83. Chemical symbol for tin
84. Circuit configuration w/o feedback (2 wds.)
87. Its chemical symbol is Xe
90. Constellation : The lesser lion (3,5)
93. Period between radar transmitter's output waveform (abbr.)
94. System On Chip
95. Chemical symbol for tantalum
97. Lowest power level capable of being demodulated (abbr.)
98. Read-only (abbr.)
99. Attenuator
100. Negation prefix
102. The "B" in BER
104. UMTS terrestrial radio access (abbr.)
106. Primary U.S. standards organization founded in 1918 (abbr.)
108. Sample group
110. Input winding of a transformer (pl.)
111. Chemical symbol for copper
112. Network department (abbr.)
113. Keyboard character deleter key
114. End of soldering iron
115. Steady-state voltage reference
119. ECM response
122. Newest buzz phrase for ubiquitous remote control and monitoring of everything (abbr.)
123. Ham award meaning Worked All Zones
124. Facility where semiconductors are manufactured
126. Cyanide (abbr.)
127. Hub of the solar system
129. Radio signals from the cosmos (abbr.)
130. Last statement in a BASIC program
132. Numerical basis for decibels (abbr.)
134. Like a surface mount component
137. The shape of a circularly polarized antenna
139. Tool for removing insulation from a wire
143. CPS
145. Angular speed unit
146. Chemical symbol for ruthenium
147. Chemical symbol for gold
148. Type of logic gate
150. Chemical symbol for mercury
151. 10E1 numerical prefix (pl.)
152. Unit of inductance (abbr.)
153. One port of an amplifier
154. The computer in 2001: A Space Odyssey
156. Short for modulator/demodulator
159. Securing device
161. Network file transfer protocol (abbr.)
162. Chemical symbol for neon
163. The design component of total product cost (abbr.)
165. Describes a region on a semiconductor that has a linear and symmetric I-V curve
167. Country of RF Cafe's residency
169. 36 inches (pl.)
171. Feedback system used to maintain constant signal level (abbr.)
174. High power density battery chemistry (abbr.)
176. 1/000 of an inch
177. RF IC manufacturer located in Dübendorf, Switzerland
179. Direct Memory Access (abbr.)
180. Type of formation for a pushrod end where it connects to a control arm (hyph., pl.)
181. Input intercept point (abbr.)
182. Chemical symbol for molybdenum
183. Unit of capacitance (abbr.)
184. Type of chart
185. One port of an amplifier
186. Numerical basis for decibels (abbr.)
187. Computer monitor cable type (abbr.)
189. Front edge of a wing (abbr.)
191. Sound frequency in the human hearing range (abbr.)
192. Circuit for maintaining constant voltage (abbr.)
194. Cooling device
196. Part of a FOR loop
197. Charged particle
198. Chemical symbol for gallium
199. Ratio of circumference to diameter
201. 1e3 uV
202. PC follower
204. Unit of length equal to 5.5 yards
206. Possess luminosity
207. He united electricity and magnetism into the concept of the electro-magnetic field (3 wds.)
208. Enter data using the keyboard
1. Spongy material used in anechoic chambers (pl.)
2. Equalizer (abbr.)
3. Test document for verifying proper function (abbr.)
5. Chemical symbol for scandium
6. Rotate about the vertical axis
7. Type of computer display (abbr.)
8. Chemical symbol for helium
9. Original Equipment Manufacturer (abbr.)
10. Output intercept point (abbr.)
11. Chemical symbol for antimony
12. Degree of IC sophistication (abbr.)
13. Time Division Multiplexing
14. Amateur radio abbreviation for the Oceania region (abbr.)
15. Software engineering tool (abbr.)
16. Intermodulation (abbr.)
17. Able to receive or transmit on different bands
19. Time taken for half the atoms of a radioactive sample to decay (hyph.)
24. Its chemical symbol is H
27. Mr. de Forest's first name
29. The "E" in TEM
30. Logarithmic unit of ratio (abbr., pl.)
32. "Texting" (abbr.)
34. A triangle that has all three sides unequal in length
35. One of the Ws in WWW
37. Display type
40. Ham's code for "Entire net stand by."
43. Current-voltage phase mnemonic
45. Chemical symbol for arsenic
46. Chemical symbol for iron
47. System for guiding aircraft (abbr.)
49. Bands between RF and baseband
50. Mathematical basis for calculating noise power for a given bandwidth and temperature (abbr.)
51. Positive voltage lead color
52. Chemical symbol for cadmium
54. Army-Navy specification prefix
56. Filter type that blocks lower frequencies (abbr.)
57. Optical cross-connect (abbr.)
59. Ham abbreviation indicating contacts with all major land masses
60. Chemical symbol for selenium
63. Type of flip-flop
65. Circuit for firing a radar magnetron (abbr., pl.)
67. Ovenized crystal oscillator (abbr.)
69. Computer communication scheme (abbr.)
71. The "D" in RFID (pl.)
72. JavaScript (abbr.)
74. Software routing that adjusts circuit parameters for best performance
75. System On Chip
77. Boolean expression (pl.)
80. Communication between stations by reflecting the radio waves off of the ionosphere
82. Isolated charges
84. Probable location of an element's electron
85. Pertaining to Boolean operations
86. Push to Talk (abbr.)
88. Electromagnetic (abbr.)
89. Unix, Linux or Windows (abbr.)
90. Line of Sight (abbr.)
91. Father of radio
92. Device attached to an antenna mast which rotates it so that the antenna can point in different directions
96. Chemical symbol for argon
98. Chemical symbol for radon
101. Compressed image file format
103. Transformer interwinding connection
104. Popular computer device interface (abbr.)
105. Automatic Calibration System (abbr.)
106. Automated Test Equipment (abbr.)
107. Big Blue
108. Family of ICs with a certain component density level (abbr.)
109. BER, 8 bits at a time
116. Multifunctional silicon devices (abbr., pl.)
117. Army-Navy specification prefix
118. Illumination device
120. European equivalent to the U.L.
121. A common RS-232 serial bus command (abbr.)
124. Frequency division multiple access (abbr.)
125. Digital transmission figure of merit (abbr.)
127. Chemical symbol for selenium
128. Chemical symbol for nickel
130. Unit of energy
131. Switch configuration (abbr.)
133. Metallic outer wrapper used to contain or reject RF signals
135. Maximum distance in orbit around the sun
136. Adding two or more inputs
137. Color quality
138. Type of logic gate
140. Column of rising hot air
141. CB slang for male police officer (2 wds.)
142. Type of bridge circuit
144. Chemical symbol for zinc
147. Type of data conversion device (abbr.)
149. Straight line emanating from a point source
152. Chemical symbol for manganese
155. Local Oscillator (abbr.)
157. Lubricant
158. Multiplexer (abbr.)
159. The UK's largest defense electronics contractor (abbr.)
160. Software drafting tool (abbr.)
161. Start frequency (abbr.)
163. Silicon transistor type (abbr.)
164. Read-only (abbr.)
166. 1/100 meter (abbr.)
168. Half of DSB
170. 10E1 numerical prefix
172. Electronics manufacturer with "meatball" logo
173. Carrier-to-noise ratio (abbr.)
175. Compound used as the frequency determining element in microwave oscillators
177. Online service
178. Maximum Usable Frequency
180. IC socket type for easy insertion & removal (abbr.)
186. The "L" in VLF
187. Type of data storage IC
188. Bits per second (abbr.)
190. Using the moon as a passive reflector to establish a signal path; moonbounce (abbr.)
191. A type of digital modulation (abbr.)
192. Capacitor menufacturer
193. Software engineering tool (abbr.)
195. Logical negation operator
197. Galilean moon
198. Chemical symbol for gallium
200. Multifunctional silicon devices (abbr.)
201. 1/000 of an amp (abbr.)
203. Chemical symbol for thallium
205. Chemical symbol for dysprosium

See solution below


2020 Crossword Puzzle 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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Engineering & Science Crossword Solution February 16, 2020 - RF Cafe

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