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In this paper, a method of stagger tuned resonant frequency shift is proposed for improving the bandwidth of planar switched parasitic array antenna. By setting the active and parasitic elements of different sizes, and adjusting the feeding location on active element and loading positions on parasitic elements respectively, the bandwidth of this antenna is improved. The simulated results show that...
A novel shunt-fed triband printed two-element collinear dipole array is presented in this letter. The planar dipole array configuration is designed using two shunt-fed back-to-back dipole elements with omnidirectional pattern. The motivation for this work was to devise a novel feed structure that has an advantage of structural simplicity with good performance. The proposed antenna can provide the...
A compact and planar dual-antenna structure is reported which combines a printed monopole and a half-slot antenna to provide dual polarization. Different excited current modes are utilized to obtain low mutual coupling between elements. A prototype is fabricated and the measured results are presented. Relative bandwidth of 23.5% and isolation of better than 23 dB are achieved.
By using inconsistent patch elements in PESPAR (planar electronically steerable passive array radiator) antenna, bandwidth enhancement of this antenna is demonstrated and the relative bandwidth is 5%. Moreover, a new impedance matching method is introduced. Details of the antenna design and results are presented and discussed to validate the performance improvement.
The effect of inter-element spacing on performance of planar switched parasitic array antenna is present in this paper. Compared with the conventional planar switched parasitic element playing its role of director in reference, the paper emphasizes the switched parasitic element also act as a reflector to provide beam switching. Thus, the antenna size reduction is achieved. This advantage makes it...
Planar electronic steering passive array radiator (ESPAR) antenna for wireless mobile terminals is proposed in this paper. To achieve conical elevation pattern and compact size, a modified central grounded hexagonal patch antenna is utilized. A robust sidelobe reduction (SLR) adaptive algorithm is invented to optimize the reactive load for each passive element. Fabrication and measurement have been...
This paper presents an investigation into the design parameters of a planar switched parasitic array antenna for possible use in wireless communication. This proposed antenna provides multiple radiation patterns by controlling the status of switches. The effect of the central cylindrical metal via radius, the feed location, the hexagonal patch size, the spacing between patch elements, and the ground...
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