Design of a wide bandwidth and high efficiency circularly polarized microstrip patch antenna using coaxial feeding technique

Abstract

A single band circularly polarized rectangular microstrip patch antenna has been simulated from the cavity equation at first and then the antenna design has been extended to 2 3 2 array. The length and thickness of the each element of the rectangular patch antenna with a slot in the center of the rectangular patch are 38 mm and 0.1 mm, respectively, which are comparatively smaller than our previously presented single-element circularly polarized microstrip antenna with an I-slot. In comparison to the bandwidth and efficiency of single element antenna, the quantity have increased about 39% and more than 90%, respectively, in the desired array antenna at the same resonant frequency that is 2.8 GHz. In this article, we also have studied and presented the return loss, bandwidth, gain, directivity, axial ratio of our aimed antenna. K E Y W O R D S cavity model, coaxial probe feed, microstrip antenna, return loss, single band antennaAbstract A novel compact X-band bandpass filter with a flat and wide passband as well as enhanced out-of-band performance is presented based on a source-load coupling architecture. The proposed architecture is symmetrically constructed of a pair of stepped-impedance feed structures and an embedded T-shape resonator, substantially improving the filter's frequency selectivity and passband performance. In order to obtain a broader stopband region, a set of stubs is loaded at the edges of the tapped open stub in the T-shape resonator. By utilizing a two-layer low temperature co-fired ceramic substrate, a prototype filter is

Artificial bee colony algorithm based modified circular‐shaped compact hybrid fractal antenna for industrial, scientific, and medical band applications

“…Selvi et al 27 have illustrated the behavior of a dual‐band antenna in which multiple split‐ring resonators were used. Hossain et al 28 have presented a circularly polarized patch antenna design in which a coaxial feeding technique was used. The measured results showed a wide bandwidth and high gain at 2.8 GHz.…”

Modeling of an electromagnetic bandgap antenna

“…Although these techniques accurately predict the antenna parameters performance, they are complex, computationally intense and do not provide an obvious understanding of the operational mechanism of the antenna. Other methods employing models such as the cavity model and transmission‐line model provide a clearer understanding of the coupling mechanism and provide initial parameters. They however do not provide explicit effects of various structure parameters.…”