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