This is an Ultra-wideband Vivaldi antenna. This antenna provides good gain from about 1.7GHz through to at least 6GHz(possibly higher). Above 1.7GHz the antenna provides directional gain. Below this frequency the antenna pattern is less defined, but still usable in many situations.

The antenna provides an excellent SWR of less than 2.5:1 from 1.7GHz.

Gain Plot

VSWR Plot

Antenna measures 90mm x 156mm x 1mm (excluding SMA)

Supplied with SMA connector.

This antenna is designed as a cheap multipurpose antenna for use primarily with SDR radios such as the HackRF/BladeRF/RTL Dongle/LimeSDR/Airspy etc etc.

For a really portable tool, this antenna can be used with a smartphone running RF Analyzer or SDRTouch.

The antenna suitable for both Receive and Transmit (please play nicely with the spectrum). It can be used for the following bands and more.

WiFi – both 2.4 and 5GHz
Bluetooth
Cellular 1800/1900/2100/2600 (reduced performance for 800/850/900)
ISM 868 or 915 (reduced performance)
FPV video and Telemetry
S-Band
C-Band

Details aspects of the design and performance of this antenna. See here

https://hexandflex.wordpress.com/2017/12/11/making-an-ultra-wideband-antenna-part-3-performance/

https://hexandflex.wordpress.com/2017/12/06/making-an-ultra-wideband-antenna-part-2/

https://hexandflex.wordpress.com/2017/12/03/making-an-ultrawideband-antenna-pt1/

Some simple Tripod Mounts are designed to fix pairs of antenna to a standard camera tripod. The files for this can be freely downloaded from Thingiverse Small cheap tripods are readily available from Amazon. If you do not have a 3D printer you can select the appropriate product option and I will send you a high quality 3D printed ABS antenna mount with appropriate mounting screws.

Dual Antenna Tripod Mount - Horizontal Orientation