Overview
The antenna is available in models directly interchangeable with all NI50- Series to facilitate low-cost updates to BCAS, Airborne Separation Assurance System (ASAS) or Traffic Collision Avoidance System (TCAS). The 1601354 directly mounts to NI50-2 mounting holes. Some may require the use of adapters, but no airframe modifications are necessary.
Radiation Pattern and Gain
The radiation pattern is adjusted omnidirectional. It has forward directivity to improve gain for ASAS, BCAS and TCAS. This adjustment in pattern and in gain improves reception and transmission characteristics while still meeting the following ARINC characteristics:
- 709-1 (Distance Measuring Equipment)
- 718 (Air Traffic Control Transponder)
- 730 (ASAS)
A slightly eccentric radiation pattern allows the forward gain to approximate that of a vertically polarized quarter wave stub. The rearward gain is within 2.5 decibels below the forward gain.
