Dipole Antenna On Metamaterial Ground Plane For WLAN Applications

TitleDipole Antenna On Metamaterial Ground Plane For WLAN Applications
Publication TypeConference Paper
Year of Publication2006
AuthorsGoussetis, G, Feresidis, A, Kitra, MI, McEvoy, P, Vardaxoglou, JC
Conference NameLAPC - Loughborough Antennas & Propagation Conference
Conference Start Date11/04/2006
PublisherLoughborough University
Conference LocationLoughborough, UK

The public uptake of the now ubiquitous wireless phone communications is being succeeded by demand for broadband data communications systems with radio access. The linearly polarized omni-directional radiation pattern of a monopole antenna is widely used in wireless communications. In order to achieve an adequate match of the antenna to the radio, the antenna’s length should be about a quarter of the operating frequency wavelength. At low frequencies this minimum length can become aesthetically obtrusive in some applications. While printed surface antennas (e.g. patch antennas) can comply with the requirement for low profile antennas, they do not readily provide an equivalent monopole type of radiation pattern. In a simple static case, a monopole type radiation pattern may be convenient when suspended from a ceiling location to cover an open-plan environment. The pattern offers improved gain, over that of the dipole type to the peripheral users in the room. Since the signal level received by each user is inversely proportional to the square of their distance to the base-station, the users directly below the dipole pattern of, receive excessive signal strengths at the expense of users at the room periphery. With careful design, it can be arranged that all users get a similar level of signal irrespective of their location in the room, therefore minimising the total power levels.

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