Antenna Design

An HRP showing licensed and predicted emissionsThe corresponding VRP for the antenna system aboveMany benefits can be obtained from a properly designed antenna system. For example, the transmitted signal can be directed towards the desired population and reduced in other areas. This reduces unwanted interference, maximises spectrum utilisation and can reduce transmit power requirements.

JDA has designed hundreds of antenna systems of various complexities, frequencies and powers throughout New Zealand, Samoa and Fiji. A high profile example is the FM antennas on Sky Tower. We can design systems with third party antennas or with antennas designed 'in house' by JDA. Two graphs showing the types of results obtained from our computer modelling are shown to the right, providing: the system's horizontal radiation pattern (HRP) and the vertical radiation pattern (VRP). 

Once a system has been designed and a transmission site has been selected, we can enter the information obtained from our models into our coverage prediction software to predict the area covered by the antenna in its environment.