Singaporean engineers from the Institute of Microelectronics (IME) have made the world’s smallest silicon antenna type CBS (cavity-backed slot), which operates at a frequency of 135 GHz. As compared to conventional antennas on chips, it gives up to 30 times more powerful signal, measuring 1.6 x 1.2 mm, that is smaller than the wavelength, which is at a frequency of 135 GHz in a vacuum of 2 mm. The photo orange antenna is located in the center of the chip.
Antenna, in conjunction with other parts of millimeter size, is capable of transmitting data at up to 20 Gbit / s, which is 200 times faster than conventional WiFi.
In the press release author of the research indicate that they have managed to reduce the size of the antenna by 70% and achieved a record gain – 5.68 dBi at the frequency of 135 GHz – by filling the cavity with a special polymer instead of air.
Established technology is quite suitable for mass production, and cheaper counterparts due to less material. In addition to the antenna, the developers designed a 3D-model of the modem chip, where this antenna will work. This chip will be different minimum dimensions and low electromagnetic interference with surrounding devices.