Is there a TV antenna that only works in Japan？

With the second generation of mobile communication technology, we have entered the cellular era. The antenna at this stage has gradually evolved into a directional antenna, and the general lobe width includes 60°, 90° and 120°. Take 120° as an example, it has three sectors.IDSB antenna for Japan.

Antennas in the 1980s were mainly single-polarized antennas, and the concept of arrays had already been introduced. Although omnidirectional antennas also have arrays, they are only vertical arrays, and single-polarized antennas have planar and directional antennas. In terms of form, the current antenna is very similar to the second generation antenna.,ISDB Antenna for Car.

In 1997, dual-polarized antennas (±45° crossed dual-polarized antennas) began to enter the stage of history. At this time, the antenna performance has been greatly improved compared to the previous generation. Whether it is 3G or 4G, the main trend is dual-polarized antennas.

In the era of 2.5G and 3G, many multi-band antennas have appeared. Because the system at this time is very complex, for example, GSM, CDMA, etc. need to coexist, so multi-band antennas are an inevitable trend. In order to reduce cost and space, multi-band became mainstream at this stage.

In 2013, we introduced the MIMO (Multiple-Input Multiple-Output) antenna system for the first time. Originally a 4×4 MIMO antenna.

MIMO technology has improved the communication capacity, and the antenna system at this time has entered a new era, that is, from the original single antenna to the array antenna and multiple antennas.