JJB Series Embeddable 1/4-wave Monopole Antenna TE Connectivity / Linx Technologies JJB Series Embedded 1/4-wave Monopole Antennas pack near the performance of a conventional monopole into an incredibly compact quarter-inch (7mm) diameter package. These JJB Series Monopole Antennas are ideal for any OEM application requiring a compact, cosmetically-attractive, low-cost antenna solution. The TE Connectivity / Linx Technologies JJB Series antennas feature a through-hole feedline that can attach directly to a user's PCB. Internal or external mounting is possible.