Wide beamwidth planar self‐balanced magnetic dipole antenna with enhanced front‐to‐back ratio

Abstract

A design approach to a novel planar self‐balanced, wide beamwidth magnetic dipole antenna with high front‐to‐back ratio (FBR) is advanced. The principle for FBR enhancement is revealed at first. As seen, the back‐lobe level can be effectively suppressed by adjusting the unbalanced current ratio (UCR) factor: By varying the radius of the circular sector magnetic dipole antenna on the bottom layer and incorporating an arc‐shaped branch at the end of the parasitic strip, the UCR factor can be properly tuned, and the back‐lobe level can be flexibly controlled. Then, a set of closed‐form formulas is derived to provide basic design guidelines and determine the initial value of key parameters. Parametric studies on FBR are then carried out to attain the ultimate designs in a step‐by‐step manner. As numerically and experimentally verified at the 2.45‐GHz band, the FBR of a planar, air‐substrate magnetic dipole antenna is indeed increased to over 30 dB with broadened E‐/H‐plane half‐power beamwidth up to 130°/90°. Good agreement between the theoretical, numerical, and experimental results has evidently validated the proposed antenna design approach.

Dual‐band stacked patch antenna with wide e‐plane beam width and stable gain at both bands

“…Also, the beam width ratio of the two main E-planes is able to be changed by modifying the PSMDA's bottom size as well as its shape. 31 It is seen the antenna exhibits wide E-plane beamwidth at both bands.…”

“…As seen from Figure 5(C)‐(F), antenna's HPBWs at 5 and 5.5 GHz are 115°/116° in E ‐plane and 45°/50° in H ‐plane. Also, the beam width ratio of the two main E ‐planes is able to be changed by modifying the PSMDA's bottom size as well as its shape 31 . It is seen the antenna exhibits wide E‐plane beamwidth at both bands.…”

A novel lens antenna with wide beamwidth using three dimensional printing

“…In addition to this, many electromagnetic dipole antennas have essential wide beamwidth radiation patterns. [10][11][12][13] The three dimensional printing technology has been significant focused due to flexibility in the choice of materials, capability to fabricate complex structures, and including time saving. 14 In the microwave region, there are many reports of antenna designs with three-dimensional printing technology.…”

“…A crossed‐dipole antenna with wide axial‐ratio beamwidth has been introduced in Reference 9. In addition to this, many electromagnetic dipole antennas have essential wide beamwidth radiation patterns 10‐13 …”

Low‐profilecomplementary dipole antenna under quadruple mode resonance with nearly equal E‐ andH‐planepatterns

“…Motivated by this task, the quadruple mode resonance concept 46 and the self-balanced principle 47,48 may possibly provide beneficial solutions with low configuration complexity. Unfortunately, on one hand, the original quadruple mode resonant prototype 46 should be specifically implemented by coaxial cable structures and it could be hardly integrated in planar format.…”