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Science Celebrity Theme Crossword Puzzle
December 5, 2021

This Science Celebrity themed crossword puzzle for December 12th contains no fewer than 18 names of notable scientists and engineers (marked with an asterisk *) known famously to folks like you who visit RF Cafe. It took quite a while to design. Elsewise, only clues and words which are directly to RF, microwave, and wireless engineering, optics, mathematics, chemistry, physics, and other science 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

Science Celebrity Theme Crossword Puzzle for December 12th, 2021 - RF Cafe
<Click for larger image>

1. Jules Antoine _________ described these patterns created by feeding the horizontal and vertical axes of an o-scope *
8. Opposite of transmitted
16. Home state of Los Alamos lab (abbr.)
17. Type of spread spectrum that does not use frequency hopping (abbr.)
20. Samuel Finley Breese _____ developed an alphabet composed of dots and dashes *
21. Chemical symbol for antimony
23. Aircraft tracking system
24. Unit of inductance (abbr.)
25. The great circle equidistant from the poles
28. Greek letter
29. European equivalent to the U.L.
31. Unit of time (abbr.)
33. Amateur radio operating mode for sharing real-time video (abbr.)
34. 3 MHz to 30 MHz
35. Johannes _____ was the the German astronomer who formulated the three laws of planetary motion *
37. 300 Hz to 3 kHz in audio (abbr.)
38. Data transmission pathway
39. Type of data conversion device (abbr.)
41. 30 kHz to 300 kHz
42. Stock symbol for Harris Communications
44. Software layer that allows a system to be programmed via a defined set of commands (abbr.)
46. Pass-Fail ________, defining limits for acceptance test
49. Intermodulation (abbr.)
50. Capacitor dielectric type
53. A common battery cell size
55. Engineering Change Order (abbr.)
56. MS's server-side script engine for dynamically-generated web pages (abbr.)
57. Weight (abbr.)
59. World's largest yearly convention of gadget and device manufacturers (abbr.)
60. Cellular Telecommunications Industry Association
61. Lunar depressions
62. Official Space Shuttle designation (abbr.)
65. Automatic Testing, Evaluation & Reporting (abbr.)
67. Bulk Acoustic Wave
69. Peak envelope power (abbr.)
71. Mass unit (abbr.)
72. Keeps wires from shorting together
75. One component of a complex number (abbr.)
76. A class of subatomic particles that are composed of quarks and take part in the strong interaction
77. Semiconductor and calculator company (abbr.)
78. Niels Henrik David ____ invented of the pre-quantum atomic model *
79. Chemical symbol for neptunium
80. Wireless local loop (abbr.)
81. Slang for when a professor hints at an exam problem (abbr.)
83. Automated Test Equipment (abbr.)
85. MS's server-side script engine for dynamically-generated web pages (abbr.)
86. Gallium nitride chemical symbol
87. Switch position
88. Defense Advanced Research Projects Agency
91. Polynomial of second order
94. International phonetic alphabet letter "P"
96. Stock symbol for Hewlett Packard
99. Chemical symbol for radium
100. An unlicensed radio band in the U.S. often used for walkie-talkies (abbr.)
101. Chemical symbol for tantalum
102. Chemical symbol for erbium
103. Harry _______ described sampling rate criteria for signals *
105. Finite Element Analysis (abbr.)
106. Part of a FOR loop
108. Digital Signal Processor (abbr.)
109. Filter type that blocks frequencies in a specified band (abbr.)
111. Image file format name extension, (pl.)
113. 10E1 numerical prefix (pl.)
115. Radio signals from the cosmos (abbr.)
116. Transmit Incremental Tuning (abbr.)
118. Unit of length (abbr.)
119. Filter type that blocks upper frequencies (abbr.)
121. Chemical symbol for praseodymium
122. Miniature RF connector
123. Amateur radio enthusiast
125. Plural of locus
127. 24 hours
129. One port of an amplifier
131. Very small aperture terminal
133. Radio frequency interference (abbr.)
134. Very large unit of apparent power (abbr.)
136. 1e-6 mA
137. Unit of inductance (abbr.)
138. Chemical symbol for silicon
139. Common shorthand reference for a capacitor
140. Unit of inductance (abbr.)
141. Radio Amateurs of Canada (abbr.)
142. James _____ Maxwell united electricity and magnetism into the concept of the electro-magnetic field *
147. Logarithmic ratio (abbr.)
149. Type of logic gate
150. Word used in describing 2-D and 3-D object dimensions; i.e., 10 mm __ 25 mm
152. Elemental compound used for microwave frequency reference oscillators (abbr.)
153. In geometry, what is a figure having ten straight sides called
155. S12 or S21 (abbr.)
157. Unit of inductance (abbr.)
158. Colorado Springs military school (abbr.)
161. Chemical symbol for gold
163. Rotate about the vertical axis
165. Airfoil shapers
167. Promotes the flow of electrical current
170. Karl Friedrich _____, after whom the unit of magnetic field strength is named *
174. Chemical symbol for strontium
175. Carrier-to-noise ratio (abbr.)
176. ___/IP scheme for networked connectivity
179. Frequency Division Duplex
180. Chemical symbol for krypton
181. Using the moon as a passive reflector to establish a signal path; moonbounce (abbr.)
184. Time delay (abbr.)
185. Electric enclosure standard organization (abbr.)
186. Chemical symbol for helium
187. George ____________, Jr. backed Nikola Tesla in "The Current Wars" against Mr. Edison *
188. Chemical symbol for europium
189. The "I" in IP2 and IP3 (pl.)
193. One port of an amplifier
195. Nordic Mobile Telephone
196. Positive voltage lead color
197. Amateur radio operators
198. Programmable Logic Device (abbr.)
199. Does a Ctrl+Alt+Del
202. The "O" in ROM
206. Base 16 number system (abbr.)
207. Galilean moon
209. Maximum Usable Frequency
211. Semiconductor lamp
212. 3 MHz to 30 MHz
213. Wire or cable connecting a radio to an antenna
215. Chemical symbol for aluminum
216. Like the moon
218. Logical negation operator
219. 1/000 of an inch
220. Part of this website's title
221. Multiplexer (abbr.)
222. Measure of source / load mismatch (abbr.)
224. Chemical symbol for lawrencium
225. Product of power and time
227. ampere-hour (abbr.)
228. FCC's Universal Licensing System (abbr.)
230. PC follower
231. Chemical symbol for lead
232. Resistive component of a capacitor's lumped element model (abbr.)
234. Guglielmo Giovanni Maria _______, aka "Father of Radio" *
236. Equalizer (abbr.)
238. The "A" in BGA
240. Electrical safety organization (abbr.)
241. Heinrich Rudolf _____ is honored with the unit of frequency named after him *
244. Type of cryptographic algorithm that takes a string and converts it to a numeric code
246. Chemical symbol for polonium
247. Parabolic antenna-to-waveguide interface component
248. Ludwig Eduard _________ determined the constant equal to 1.3806503 × 10E-23 m2 kg s-2 K-1 *
2. Electrical component the stores energy in a magnetic field
3. Miniature threaded RF connector (pl.)
4. Analog-to-Digital (abbr.)
5. Java server pages (abbr.)
6. Workplace safety group (abbr.)
7. Unit of time (abbr.)
9. Electromagnetic (abbr.)
10. Solid of rotation whose sides are the hypoteneuse of a right triangle
11. Chemical symbol for erbium
12. Prevent the direct physical transfer of signals from one point to another
13. Amateur radio operator who is qualified to administer Amateur Radio licensing examinations (abbr.)
14. Satellite TV system
15. Type of matrix barcode used with laser scanning(abbr.)
18. "Calling any amateur radio station"
19. Jean-Baptiste Joseph _______ described this type of numerical transform used in electronics *
22. Chemical symbol for bismuth
25. 1.602E-19 Joules
26. 300 MHz to 3 GHz
27. Sound frequency in the human hearing range (abbr.)
28. Common computer peripheral device (pl.)
29. Chemical symbol for copper
30. A keyboard key
32. Thomas Alva ______ inventor the incandescent light bulb
36. Governmental agency that monitors pollution (abbr.)
37. Alessandro Giuseppe Antonio Anastasio _____ invented the electric pile (battery) *
38. Circuit or equipment that is analyzed only with regards to its external behavior (2 wds.)
39. Amateur Radio Association (abbr.)
40. Common shorthand reference for a capacitor
41. The "L" in VLF
43. "Texting" (abbr.)
45. What is a number said to be if it is the square root of a negative number
47. Last statement in a BASIC routine
48. Current-voltage phase mnemonic
51. Type of current flow (abbr.)
52. Schema for computer or device presentation to the operator (abbr.)
54. Its chemical symbol is Ar
58. Loose end of a cable
59. 10E-2 numerical prefix
62. Force a signal to an insignificant level
63. Chemical symbol for thallium
64. Crystal filter type (abbr.)
66. Part of a FOR loop
67. Light rays
68. Sir Charles __________ invented the bridge circuit used for accurate electrical measurements *
69. BlackBerry or Palm for example (abbr.)
70. Type of e-mail address system (abbr.)
72. Intermodulation distortion (abbr.)
73. Signal-to-noise ratio (abbr.)
74. Chemical symbol for thallium
77. Medium for storing large amounts of digital data
82. Ham's code for "Net is Free (not controlled)."
84. Semiconductor and calculator company (abbr.)
86. Chemical symbol for gallium
89. A common battery cell size
90. A common battery cell size
91. Semiconductor device type (abbr.)
92. Type of logic gate
93. Polish a crystal to an exact frequency
94. Substrate for mounting components (abbr.)
95. What is the name of the curve traced out by a point on the circumference of a circle being rolled along a straight line
96. Color quality
97. Ratio of circumference to diameter
98. ARRL's magazine
104. End of a soldering iron (pl.)
105. Small unit of capacitance (abbr.)
107. Georg Simon ___ has the unit of resistance named after him *
108. Keyboard key
110. Slang for antenna
112. Joseph Ritter von __________ discovered of the dark absorption lines in the sun's spectrum *
113. Type of current
114. 3 GHz to 30 GHz
116. Greek letter
117. Time delay (abbr.)
120. Chemical symbol for plutonium
124. Powers pneumatic devices
126. Plug-in for computer bus
128. Modulation type (abbr.)
130. Coefficient of temperature (abbr.)
131. Abbreviation for peak voltage
132. Amplifier linearity specification (abbr.)
133. Computer monitor cable type (abbr.)
134. Unit of frequency (archaic, abbr.)
135. Put into motion
143. Local Oscillator (abbr.)
144. Send Morse Code
145. Crystal filter type (abbr.)
146. Gustav Robert _________ developed a law stating the sum of all currents into and out of a node is zero *
148. Bits per second (abbr.)
149. Scheme to maintain proper frequency (abbr.)
151. 36 in. (abbr., pl.)
152. Yttrium Aluminum Garnet
154. Chemical symbol for calcium
156. Geometric entity with only length
158. Summed
159. Upper frequency (abbr.)
160. Abbreviation for acknowledge (also a common word used by Bill the Cat)
162. Chemical symbol for arsenic
164. ________ function, mathematically relates output to input
166. Filter type that blocks frequencies in a specified band (abbr.)
168. Chemical symbol for neodymium
169. Type of shielded RF cable with two inner conductors
171. User Datagram Protocol
172. Official Space Shuttle designation (abbr.)
173. Integrate data onto a carrier wave
174. Phillip Hagar _____ developed the eponomously named chart used to plot immittance *
176. Base of the decimal number system
177. Power adding device
178. Period between radar transmitter's output waveform (abbr.)
181. European Telecommunications Standards Institute (abbr.)
182. Akin to an EE, CE, AE, etc.
183. Effective Radiated Power (abbr.)
190. Home state of Los Alamos lab (abbr.)
191. Chemical symbol for chlorine
192. Constellation : The bull
194. Opposite of set
197. One type of filter construction used in the 500 MHz to 1.5 GHz range
200. Negatively charged elementary particle
201. Digital transmission figure of merit (abbr.)
203. Chemical symbol for neon
204. Yard (abbr.)
205. Measured
206. Amateur radio enthusiast
208. Switch position
209. Wire diameter unit (abbr.)
210. Facsimile
214. Negation prefix
217. Digital Signal Processor (abbr.)
220. Greek letter
223. Unit of magnetic flux(abbr.)
226. BASIC program command
227. Type of current flow (abbr.)
228. Schema for computer or device presentation to the operator (abbr.)
229. Impenetrable physical barrier
230. Advanced Research Projects Agency (abbr.)
232. Chemical symbol for europium
233. Below ELF
235. Chemical symbol for nickel
237. ARRL's magazine
239. Ham-ese for Young Lady
241. Chemical symbol for helium
242. Chemical symbol for rhodium
243. Chemical symbol for zirconium
244. Chemical symbol for holmium
245. CPS

Reproduction of this puzzle without the express permission of RF Cafe is prohibited.

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.

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Science Celebrity Theme Crossword Solution for December 5th, 2021 - RF Cafe

Windfreak Technologies Frequency Synthesizers - RF Cafe
withwave microwave devices - RF Cafe

Innovative Power Products Passive RF Products - RF Cafe

TotalTemp Technologies (Thermal Platforms) - RF Cafe