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A beam steerable square loop antenna over hybrid high impedance surface is designed and simulated with the help of Agilent ADS momentum and its benefit in increasing the Wi-Fi range and speed is demonstrated. At a test frequency of 4.7 GHz, the antenna produces a tilted beam in the direction of Φmax = 315° and θmax = 30° with 8 dB gain. Compared to conventional laptop antennas, the proposed antenna...
A novel method of producing multiple axial and tilted beams using eight feed double square loop (DSL) antenna is proposed. With varying permittivity value of dielectric substrate, the DSL antenna produces multiple beams and steer each of the beam produced at step of 45° throughout the 360° of space, thus offering wide range of option for any modern wireless device integrated with this antenna to focus...
A novel method of producing and switching multiple beams using double square loop (DSL) antenna is proposed. By switching the feed point, the pattern can be steered at a coarse step of 45?? throughout the 360?? of space and the associated beam can be directed in eight directions, thus offering a wide range of options for modern wireless devices to focus the beam at a desired target direction. Furthermore,...
Systematic investigations for three beam switched antenna configurations, namely, the square loop with middle feeding, the square loop with corner feeding and the circular loop antenna are undertaken and the results focusing on their radiation patterns are presented. All these configurations exhibit two zones of impedance bandwidth in the UWB region (3.1 GHz - 10.6 GHz), however, only one of them...
A beam switched loop antenna with eight symmetrical feeding ports is proposed for beam steering applications. The feeding ports when excited one by one generate eight steerable tilted beams capable of covering complete space in front of antenna. The return loss, polarisation and all other antenna parameters stays the same for all the eight feeding configurations. The directivity of the antenna for...
A circular loop antenna with feed points on the loop is proposed. This antenna is envisaged to be useful for some beam steering applications. An example of this antenna with 8 feed points is analyzed. The eight feed points are placed symmetrically on the loop, which when excited one at a time steer the beam in eight different directions at steps of 45deg. Apart from the direction of the beam, the...
A novel hybrid high impedance surface is presented and a beam steerable four feed square loop antenna is built on this structure. At a test frequency of 4.7 GHz, the proposed hybrid high impedance surface based square loop antenna is 4.69 mm high and has an impedance bandwidth of 650 MHz and directivity of 8.7 dBi. Compared with the earlier reported steerable square loop antenna the new antenna s...
A novel form of double square loop (DSL) antenna for beam adaptive applications is proposed. The double square loop antenna consists of two individual square loops placed at 45deg to each other with a common centre. The antenna has eight feeding points on the inner track, which when excited one at a time steer the beam at 45deg throughout the 360deg of space. In addition, the DSL antenna operates...
This paper covers five different types of single element beam scanning antennas under electronic switch control. Firstly, a rectangular spiral antenna with shorting and open switches is presented. Following that, its polarization and other antenna parameter limitations are addressed. Then new structures, namely: star strip, star patch and square loop antennas, introduced to overcome the polarization...
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