A novel wideband planar quasi-yagi antenna loading with parasitical patches and multiple reflectors

Abstract

In this paper, a novel wideband microstrip-fed quasi-Yagi antenna is presented. The proposed quasi-Yagi antenna consists of a microstrip-fed monopole, three radiating patches (two square patches and a rectangular patch), and three parasitic strip elements as the function of reflector. In order to achieve wide bandwidth, two parasitical patches are etched on both sides of the substrate. Furthermore, the stepped microstrip feeding line is adopted so as to get a good impedance matching. A fabricated prototype with the dimensions of 40 mm × 55.5 mm yields a directional far-field radiation pattern with no director, a −10 dB bandwidth (2.21-5.4 GHz) of 83.8% and a peak radiation gain of 4.17 dBi. Finally, the proposed antenna is analyzed, fabricated and measured. Measured and simulated results are in good agreement.

VHF/UHF wideband slim monopole antenna with meander line loading and slot-modified ground designed by characteristic mode analysis

“…[13] proposes a wideband microstrip antenna loaded with parasitic strips. [14] presents a microstrip-fed monopole antenna with parasitic patches to achieve wideband characteristics. [15] presents a planar wideband monopole antenna with two asymmetrical ground planes.…”

A wideband and low-cost square radial line slot array antenna for circularly polarized applications

“…Since the ruling of wideband technology by the Federal Communication Commission [1], the wideband antennas have drawn more attention for use in many applications such as modern high-speed wireless communication systems [2,3,4,5]. For example, different types of wideband antennas with relatively good performance in published works [6,7,8,9,10,11] have been developed. However, compared with circular polarized antennas [12,13,14,15,16,17,18], these wideband linearly polarized antennas are more likely to cause polarization mismatch.…”