RADARS crossword

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Across
  1. 4. room where an Amateur Radio operator keeps his or her station equipment
  2. 5. array of dipole antennas mounted in such a manner that every element of each antenna is in an extension, with respect to its long axis, of its counterparts in the other antennas in the array, usually mounted vertically in order to increase overall gain and directivity in the horizontal direction
  3. 8. aerial consisting of two poles or sections to the radiating element - in its most common it is a half-wavelength long at the frequency of operation
  4. 10. lowest portion of Earth's atmosphere where nearly all weather takes place
  5. 11. term coined by John R. Pierce as a contraction of the term transresistance
  6. 14. the direction of a magnetic or electrical field
  7. 16. instrument for converting sound waves into electrical energy
  8. 17. process of configuring an instrument to provide a result for a sample within an acceptable range
  9. 20. electrical device that transfers electrical energy between two or more circuits through electromagnetic induction
  10. 22. concentric conductors separated by an insulator
  11. 24. distance a radio wave travels in one RF cycle
  12. 26. the behaviour of radio waves as they travel from one point to another
  13. 27. in radio amateur use, bi-directional communication on a single frequency
  14. 28. used when it is possible to transmit and receive simultaneously
  15. 30. device used to store an electric charge, consisting of one or more pairs of conductors separated by an insulator
  16. 31. horizontal dipole fed at the centre with parallel wire transmission line
  17. 32. process of varying one or more properties of a periodic waveform, called the carrier signal, with information to be transmitted
Down
  1. 1. electronic device that can increase the power of a signal
  2. 2. combination of a radio receiver and a radio transmitter that receives a signal and retransmits it, so that two-way radio signals can cover longer distances
  3. 3. used for measuring the input impedance of antenna systems in radio applications
  4. 6. one or more cells, in which chemical energy is converted into electricity and used as a source of power
  5. 7. conversation between two radio amateurs
  6. 9. the measurement of a network of triangles in order to determine distance and relative positions of points spread over an area
  7. 12. the layer of the earth's atmosphere which contains a high concentration of ions and free electrons
  8. 13. conductive substance with a low melting point used to connect components in a circuit
  9. 15. passive two-terminal electrical component that stores electrical energy in a magnetic field when electrical current flows through it
  10. 17. used to generate electricity, or one that is used to make chemical reactions possible by applying electricity
  11. 18. unit of power in the metric system
  12. 19. used to recover the information content from the modulated carrier wave
  13. 21. electrical component that limits the flow of electrical current in a circuit
  14. 23. specific range of frequencies in the radio frequency spectrum
  15. 25. arrangement of resistors which reduces the strength of a radio or audio signal
  16. 29. typically an electrical transformer used to connect an unbalanced circuit to a balanced one