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