| 11. | Phased-array antennas became practical with the introduction of tunable high-power coherent radio frequency oscillators in the 1960s.
|
| 12. | The technology advance that makes the system possible is a proprietary solid-state, phased-array antenna developed by Boeing.
|
| 13. | Japanese researcher Hidetsugu Yagi also investigated wireless energy transmission using a directional array antenna that he designed.
|
| 14. | Additionally, the non-moving phased-array antennas were mounted directly in concrete and could be hardened too much greater strengths.
|
| 15. | On the scientific front, his contributions are reported in the areas of monopulse array antennas and polarimetric Radars.
|
| 16. | The APQ-159's primary upgrade was the addition of a new planar phased array antenna, replacing the-153's parabolic dish.
|
| 17. | Phased array antennas are composed of evenly spaced similar antenna elements, such as aerials or rows of slotted waveguide.
|
| 18. | In contract to the normal array antenna, the array elements are different and are arranged in a pseudo-periodic manner.
|
| 19. | A commonly proposed approach to ensuring fail-safe beam targeting is to use a retrodirective phased array antenna / rectenna.
|
| 20. | One of the early applications of digital computers was in switching the signal phase in elements of large phased-array antennas.
|
