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Sleeve baluns
Printed Sleeve Monopole Antenna | IntechOpen
Figure 1 from Design of Sleeve Dipole Antenna for Suppressing Leakage Current on a Coaxial Cable | Semantic Scholar
Build a Sleeve Dipole Antenna for 2m VHF - DW1ZWS - Philippines
Design of Dual Band Sleeve Dipole Antenna for Mobile Jammer Applications | Semantic Scholar
Team BlackSheep Online Store - TBS Tracer Sleeve Dipole RX Antenna (2pcs)
A new compact and wideband CPW-fed sleeve antenna | International Journal of Microwave and Wireless Technologies | Cambridge Core
Sleeve Dipole Antenna Design and Build - In Compliance Magazine
Sleeve Dipole Antenna Design and Build - In Compliance Magazine
The Construction Principles for "open-sleeve"-Elements