4.5 Recommended technical standards for New Zealand

It should be noted that measurements at this frequency order are difficult to carry out and tend to be confined to laboratory testing only. Taking into account that New Zealand users will probably want to be able to source equipment from as wide a range of suppliers as possible throughout the world, the MED is of the view that the technical standards adopted should not be unnecessarily restrictive.

4.5.1 Frequency Bands

It is recommended that New Zealand adopt the same frequency plan as Australia and the UK. That is that the frequency bands 71.125-75.575 GHz and 81.125-85.875 GHz be allocated on a primary basis for point to point fixed linking in New Zealand.

4.5.2 Transmitter Power

The difference between the US (3 watts) and the UK/Australia (1 watt) limits is small, hence it is proposed that New Zealand adopt the US transmitter power standards of 3 watts with a maximum spectral density of 150 mW/100 MHz as this would give slightly better performance and provide for a wider range of equipment.

4.5.3 Antenna characteristics.

There is merit in having a minimum gain specified as it ensures only very narrow beam widths are used. The figure of 43 dBi is generally accepted in both North America and Europe for this standard. The directivity pattern adopted by Australia and the US would appear to be relevant to New Zealand to ensure a high level of frequency re-use.

4.5.4 Maximum Radiated Power

The higher limit adopted by the UK and the USA of +55 dBW e.i.r.p. would appear to be appropriate to enable the introduction of equipment from a wider range of sources.