Controllable beam directive antenna has been developed by integrating a TM01 mode patch antenna with an electromagnetic bandgap (EBG) surface. The beam direction is steered when vias in each EBG sector are switched in and out. Each of the six sectors has the vias grouped together for ease of switching. The sector switching steers the radiation beam with a stable antenna reflection coefficient. Radiation patterns are presented showing six sector steering.

Antenna control using EBG

In this paper, a low profile patch antenna switchable radiation pattern diversity with total thickness of less than λ 0 /14 has been established.. The novel antenna structure is based on a conformal patch antenna operating in TM01 mode is integrated over an electromagnetic band gap (EBG) surface to provide a beam scanning antenna. The circular EBG elements are arranged in 6-sectors and the vias on each sector of the EBG are switched in and out to steer the beam into that sectors. The reflection coefficients for the antenna when the vias are switched remain stable. The simulation and experimentation results have shown that the antenna power pattern directed toward the sector, without via or the middle of sectors, without via. Overall a flexible low profile beam steering antenna is demonstrated. The antenna is designed for wireless network application especially to improve the system performance in multipath propagation environment. Furthermore, the low profile antenna makes it suitable to be used in vehicular application

A Low Profile Switchable Pattern Directivity Antenna using Circular Sectorized EBG

Using a dielectric resonator ring around the monopole to reduce the profile of the parasitic antenna array, it is shown that less than 50% of the original height can be achieved, and a parasitic array with a dielectric ring for each monopole is studied.

Low profile parasitic antenna array of monopole by using dielectric resonator ring

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Low profile parasitic antenna array of monopole by using dielectric resonator ring