Description     Claims     Drawing  

EP17175123A   [0005] 
GB2316539A   [0007] 

A Sleeve Monopole Antenna with Wide Impedance Bandwidth for Indoor Base Station Applications   [0006] 
Design of a wideband sleeve antenna with symmetrical ridges   [0006] 
A novel wideband sleeve antenna with capacitive annulus for wireless communication applications   [0006]