The ANT500 is a telescopic antenna designed for operation from 75 MHz to 1 GHz with a total length that is configurable from 20 cm to 88 cm long. Each ANT500 is made of stainless steel and features an SMA male connector, rotating shaft, and adjustable elbow.
2.4 GHz Antenna for Wireless Modules with Adapter Cable
GSM / Cellular Antenna Quad Band Slim Sticker Type 3dBi uFL
A GSM antenna really very fine and compact.