https://www.cnx-software.com/2013/05/23/88-50-jesurun-nx003ii-quad-core-mini-pc-comes-with-a-webcam-and-an-external-wi-fi-antenna/?amp=1
Do you remember MK812, a dual core mini PC with a built-in camera, and an external high-gain Wi-Fi antenna? Well, I've just noticed a similar device
quad coremini pcjesuruncomes
https://www.mdpi.com/2072-666X/14/7/1316
A dual-band four-element MIMO antenna was designed and fabricated with enhanced isolation. The introduced antenna was fed by a coplanar waveguide (CPW) and...
dual bandmimo antennadesignquadelement
https://www.sparkfun.com/quad-band-wired-cellular-antenna-sma.html
A Quad-band antenna for embedded cellular devices. This antenna will allow you to connect your cellular module to the outside world. Operates on four...
quad bandcellular antennasparkfun electronicswiredsma
https://www.sparkfun.com/quad-band-cellular-duck-antenna-sma.html
This is a fantastic find for SFE. A small, high-quality, quad-band, standard SMA terminated, cellular antenna. Specifications: GSM/850E : 824 to 894MHz GSM :...
quad bandduck antennasparkfun electronicscellularsma