Advanced Technologies Development
The Advanced Technology Development Center not only focuses on longer-term R&D but also coordinates with other Anritsu sections to challenge ideas and issues using the full breadth of abilities and resources across the group.
Typical key development themes are mm-Wave measurement and antenna-related OTA measurements [*1], both of which are critical technologies in deployment of fifth-generation (5G) mobile communications system.
[*1] OTA Measurement
OTA is the abbreviation for Over The Air, meaning measuring the antenna TRx performance of wireless equipment, which is conventionally measured by a cable connected to a wireless equipment connector.
Research into fifth-generation (5G) mobile communications system is advancing with focus on using massive MIMO and beam forming technologies, etc., in the microwave and mm-Wave bands. Additionally, RF ports may disappear with mm-Wave deployment, increasing the importance of OTA measurements for evaluating antenna directivity, power, etc.
The previous Far-Field Measurement (FFM) method requires long-term measurement in a large-scale measurement environment. Additionally, at mm-Wave band measurements expected to be adopted by fifth-generation (5G) mobile communications system due to the large transmission capacity, FFM suffers from decreased sensitivity due to attenuation of the signal strength as the signal propagates over longer distances.
The advance technology development center is working to develop a low-cost Near-Field Measurement (NFM) method that solves this issue.
Development of technologies for measuring mm-Wave bands up to frequencies of 300 GHz used by fifth-generation (5G) mobile communications system is in progress.
In 2014, we successfully developed a pre-selector (variable filter) for frequencies above 100 GHz, which had proved difficult to implement previously, and Anritsu was the first company in the world to develop a spectrum analyzer incorporating a variable filter. A 300-GHz band spectrum analyzer is currently being developed to support future measurement needs using the expanded mm-Wave band.