Wandel & Goltermann WG CPM-10 DECT Omnidirectional Antenna Protocol Monitor [Used]
( 231197286539) )
Wandel & Goltermann CPM-10 DECT Omnidirectional Antenna for Protocol Monitor • Believed Fully Working
Photo shows the actual item for sale
Here's a DECT antenna. Looks like it's from a very high end German-made protocol analyzer. Very expensive new...
Note that the cable end is unterminated (it's just 50 ohm coax cable, so it should be easy to add a suitable connector)