The paper presents a two-phase state based multi-beam-switching scheme implemented on a customdesigned 4 × 4 antenna array operating with a bandwidth of 1.5 GHz around 14 GHz. The antenna array and the beam-switching scheme have been experimentally validated. A phasing network designed to produce two phase states is used to experimentally validate the beam-switching and five beam states are presented, though this can be extended to other configurations using the split beam as a building block to construct multiple beams. The antenna can find potential use in multiuser millimetre-wave massive MIMO scenarios which require simultaneous multiple beams along selective directions.

Abstract-In this paper, a multifunctional microstrip antenna is designed, fabricated and experimentally verified for operation in AWS, GSM, WiMAX and WLAN bands. This microstrip patch antenna has two U-shaped slots to achieve the dual wideband operation required to meet these specifications. The dimensions and locations of the Uslots are designed appropriately. The thick substrate used here helps in integrating the antenna with the existing aircraft panel material while achieving wide bandwidths. Experimental results of this single feed antenna indicate that it meets all current requirements for in-cabin wireless communication needs.

A Digital Video Broadcast Terrestrial (DVB-T)-based passive radar requires the development of a dedicated antenna array that performs satisfactorily over the entire DVB-T band. The array should require no mechanical adjustments to the interelement spacing to correspond to the DVB-T carrier frequency used for any particular measurement. This study describes the challenges involved in designing an ultra high frequency (UHF) antenna array with a bandwidth of 450 MHz. The design procedure is discussed and a number of simulated array configurations are demonstrated. The final configuration of the array will be shown along with the simulations of the expected performance over the desired frequency span. Finally, the actual array is characterised to evaluate its performance based on data from anechoic chamber measurements.

A Digital Video Broadcast Terrestrial (DVB-T) based passive radar requires the development of a dedicated antenna array that performs satisfactorily over the entire DVB-T band. The array should require no mechanical adjustments to interelement spacing to correspond to the DVB-T carrier frequency used for any particular measurement. This paper describes the challenges involved in designing an antenna array with a bandwidth of 450 MHz. The design procedure is discussed and a number of simulated array configurations are demonstrated. The final configuration of the array will be shown as well as simulations of the expected performance over the desired frequency span