Title :
Mechanical antenna downtilt and its impact on system design
Author :
Lee, David J Y ; Xu, Ce
Author_Institution :
AirTouch Commun. Inc., USA
Abstract :
Mechanical antenna downtilting has been an effective way to reduce interference by confining the signal in its own coverage cell. It can reduce co-channel interference significantly when a notch is developed in the direction of the co-channel cell. We define the condition for the antenna pattern to develop a notch and discuss the impact of downtilt on the system design. We also introduce the concept of significant and optimal notch. Computer simulation of different antenna patterns is done to illustrate the notch developing process
Keywords :
antenna radiation patterns; cellular radio; cochannel interference; directive antennas; interference suppression; land mobile radio; radiofrequency interference; antenna patterns; cellular radio system; cochannel interference; computer simulation; coverage cell; directional antenna; interference reduction; mechanical antenna downtilt; optimal notch; significant notch; system design; Computer simulation; Directional antennas; Directive antennas; Equations; Guidelines; Interchannel interference;
Conference_Titel :
Vehicular Technology Conference, 1997, IEEE 47th
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-7803-3659-3
DOI :
10.1109/VETEC.1997.600366
