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ANSWERS TO QUESTIONS Q1. THROUGH Q48.

A1. Half-wave (Hertz) and quarter-wave (Marconi).
A2. Coupling device, feeder, and antenna.
A3. Frequency of operation of the transmitter, amount of power to be radiated, and general direction of the receiving set.
A4. One-half the wavelength.
A5. Current and voltage loops.
A6. Current and voltage nodes.
A7. Reciprocity of antennas.
A8. Electric (E) field.
A9. Circular polarization.
A10. Vertical polarization.
A11. Less interference is experienced by man-made noise sources.
A12. Vertical polarization.
A13. 73 ohms.
A14. Anisotropic radiator.
A15. Isotropic radiator.
A16. Anisotropic radiator.
A17. Dipole, doublet and Hertz.
A18. Nondirectional.
A19. Vertical plane.
A20. The pattern would flatten.
A21. To connect one end through a capacitor to the final output stage of the transmitter.
A22. A circular radiation pattern in the horizontal plane, or same as a half wave.
A23. It is composed of a series of conductors arranged in a radial pattern and buried 1 to 2 feet below the ground.
A24. Nine times the feed-point impedance.
A25. Folded dipole.

A26. To produce desired phase relationship between connected elements.
A27. Major lobes have the greatest amount of radiation.
A28. Four.
A29. As more elements are added, an unbalanced condition in the system occurs which impairs efficiency.
A30. By increasing the lengths of the elements of the array.
A31. Directivity increases.
A32. Lower radiation resistance.
A33. Parallel and in the same plane.
A34. They sharpen.
A35. Extremely low radiation resistance, confined to one frequency, and affected by atmospheric conditions.
A36. Along the major axis
A37. Symmetrically.
A38. Length of the parasitic element (tuning) and spacing between the parasitic and driven elements.
A39. Increased gain and directivity.
A40. Rotary array.
A41. Their adjustment is critical and they do not operate over a wide frequency range.
A42. Increased gain.
A43. Multielement parasitic array.
A44. One-half wavelength.
A45. Wave antenna.
A46. Opposite.
A47. It requires a large antenna site.
A48. For omnidirectional vhf communications.