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