21. This caused the collapse of the tower and destroyed the directional antenna system . 22. A directional antenna system is used during the station's nighttime hours. 23. Applications of the hybrid include monopulse comparators, modulators, and phased array radar antenna systems . 24. The station is reportedly off the air with antenna systems dismantled in October, 2012. 25. A smaller antenna system was built but was less efficient. 26. More than 30, 000 60 cm antenna systems were sold in the early 1980s. 27. Thermal radiation enters the instrument through a three-mirror antenna system . 28. This is an antenna system that you can walk to it and touch it. 29. Patented in 2004, one phased array antenna system is useful in automotive radar applications. 30. Distributed antenna systems may be placed inside buildings for increasing wireless signals within buildings.
