Monopole antenna

Port (circuit theory)

Engineering

MIMO

Bandwidth (computing)

Particle physics

Telecommunications

Computer science

Antenna (radio)

Acoustics

Broadside

Beamforming

Physics

Wideband

Optics

Resonance (particle physics)

Electronic engineering

Patch antenna

Microstrip antenna

Channel (broadcasting)

IEEE Transactions on Antennas and Propagation

A low-profile wideband tri-polarized multi-input multi-output (MIMO) antenna is proposed in this communication. Based on characteristic mode analysis (CMA) of a circular patch, four slots are etched symmetrically on the patch to transform the high-order monopole-like modes into broadside modes with lower resonant frequencies. Four sets of shorting pins are also applied to simultaneously adjust the resonant frequencies of the monopole-like modes and broadside fundamental modes of the patch. The effects of the slots and the shorting pins on these modes are analyzed in detail. Three dual-resonance ports with high isolation are achieved by exciting three pairs of orthogonal modes of the patch. The proposed antenna is wideband with respect to its profile (bandwidth/height = 216), as facilitated by the dual-resonance property of each port. Experimental results show that the proposed antenna features high port isolation (>35 dB) and high gain (>5.58 dB). The proposed low-profile wideband tri-port antenna can be applied in highly integrated MIMO systems.

A Low-Profile Wideband Dual-Resonance Tri-Port MIMO Antenna