High band antenna elements and a multi-band antenna

An antenna element for a multiband antenna, said multiband antenna configured to operate in at least two frequency bands, said antenna element being configured to resonate in a higher frequency band of said at least two frequency bands, and said antenna element being configured to receive a signal from an unbalanced signal feed, said antenna element comprising:

• a stalk mounted on an intermediate ground plane;
• at least one radiating element extending from said stalk;
• a balun mounted on said stalk and configured to receive and convert an unbalanced signal from an unbalanced signal feed to a balanced signal and to supply said balanced signal to said at least one radiating element;
• and
• at least one resonance suppression filter, said at least one resonance suppression filter comprising an inductive component and a capacitive component arranged in parallel, said at least one resonance suppression filter being configured to suppress signals in a frequency band that is lower than said higher frequency band,
• wherein said at least one resonance suppression filter is positioned to decouple said stalk from a ground plane at frequencies within said lower frequency band, said at least one resonance suppression filter being mounted such that said intermediate ground plane is coupled to said ground plane at the higher frequency band and is decoupled from said ground plane at the lower frequency band.